+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+/*
+$Log$
+Revision 1.18 2000/04/17 09:37:33 kowal2
+removed obsolete AliTPCDigitsDisplay.C
+
+Revision 1.17.2.2 2000/04/10 08:15:12 kowal2
+
+New, experimental data structure from M. Ivanov
+New tracking algorithm
+Different pad geometry for different sectors
+Digitization rewritten
+
+Revision 1.17.2.1 2000/04/10 07:56:53 kowal2
+Not used anymore - removed
+
+Revision 1.17 2000/01/19 17:17:30 fca
+Introducing a list of lists of hits -- more hits allowed for detector now
+
+Revision 1.16 1999/11/05 09:29:23 fca
+Accept only signals > 0
+
+Revision 1.15 1999/10/08 06:26:53 fca
+Removed ClustersIndex - not used anymore
+
+Revision 1.14 1999/09/29 09:24:33 fca
+Introduction of the Copyright and cvs Log
+
+*/
+
///////////////////////////////////////////////////////////////////////////////
// //
// Time Projection Chamber //
#include <fstream.h>
#include "AliMC.h"
-//MI change
+
#include "AliTPCParam.h"
-#include "AliTPCD.h"
#include "AliTPCPRF2D.h"
#include "AliTPCRF1D.h"
+#include "AliDigits.h"
+#include "AliSimDigits.h"
+
+#include "AliTPCDigitsArray.h"
+#include "AliCluster.h"
+#include "AliClusters.h"
+#include "AliTPCClustersRow.h"
+#include "AliTPCClustersArray.h"
+
ClassImp(AliTPC)
fNtracks = 0;
fNclusters= 0;
//MI changes
- fDigParam= new AliTPCD();
- fDigits = fDigParam->GetArray();
+ fDigitsArray = 0;
+ fClustersArray = 0;
+ fTPCParam = 0;
}
//_____________________________________________________________________________
//
// Initialise arrays of hits and digits
fHits = new TClonesArray("AliTPChit", 176);
- // fDigits = new TClonesArray("AliTPCdigit",10000);
- //MI change
- fDigParam= new AliTPCD;
- fDigits = fDigParam->GetArray();
+ gAlice->AddHitList(fHits);
+ //MI change
+ fDigitsArray = 0;
+ fClustersArray= 0;
+ fTPCParam = 0;
//
// Initialise counters
fClusters = 0;
fTracks = 0;
- fNsectors = 72;
+ fNsectors = 0;
fNtracks = 0;
fNclusters= 0;
- fDigitsIndex = new Int_t[fNsectors+1];
- fClustersIndex = new Int_t[fNsectors+1];
+
//
fIshunt = 0;
//
delete fDigits;
delete fClusters;
delete fTracks;
- delete fDigParam;
- if (fDigitsIndex) delete [] fDigitsIndex;
- if (fClustersIndex) delete [] fClustersIndex;
+ if (fDigitsArray!=0) delete fDigitsArray;
+ if (fClustersArray!=0) delete fClustersArray;
+
+ if (fTPCParam) delete fTPCParam;
}
//_____________________________________________________________________________
//
// Add a simulated cluster copy to the list
//
- if(!fClusters) fClusters=new TClonesArray("AliTPCcluster",10000);
+ if(!fClusters) fClusters=new TClonesArray("AliTPCcluster",900000);
TClonesArray &lclusters = *fClusters;
new(lclusters[fNclusters++]) AliTPCcluster(c);
}
-//_____________________________________________________________________________
-void AliTPC::AddDigit(Int_t *tracks, Int_t *digits)
-{
- //
- // Add a TPC digit to the list
- //
- // TClonesArray &ldigits = *fDigits;
- //MI change
- TClonesArray &ldigits = *fDigParam->GetArray();
- new(ldigits[fNdigits++]) AliTPCdigit(tracks,digits);
-}
-
//_____________________________________________________________________________
void AliTPC::AddHit(Int_t track, Int_t *vol, Float_t *hits)
{
//_____________________________________________________________________________
void AliTPC::BuildGeometry()
{
+
//
// Build TPC ROOT TNode geometry for the event display
//
TTUBS *tubs;
Int_t i;
const int kColorTPC=19;
- char name[5], title[20];
+ char name[5], title[25];
const Double_t kDegrad=TMath::Pi()/180;
- const Double_t loAng=30;
- const Double_t hiAng=15;
- const Int_t nLo = Int_t (360/loAng+0.5);
- const Int_t nHi = Int_t (360/hiAng+0.5);
+ const Double_t kRaddeg=180./TMath::Pi();
+
+
+ Float_t InnerOpenAngle = fTPCParam->GetInnerAngle();
+ Float_t OuterOpenAngle = fTPCParam->GetOuterAngle();
+
+ Float_t InnerAngleShift = fTPCParam->GetInnerAngleShift();
+ Float_t OuterAngleShift = fTPCParam->GetOuterAngleShift();
+
+ Int_t nLo = fTPCParam->GetNInnerSector()/2;
+ Int_t nHi = fTPCParam->GetNOuterSector()/2;
+
+ const Double_t loAng = (Double_t)TMath::Nint(InnerOpenAngle*kRaddeg);
+ const Double_t hiAng = (Double_t)TMath::Nint(OuterOpenAngle*kRaddeg);
+ const Double_t loAngSh = (Double_t)TMath::Nint(InnerAngleShift*kRaddeg);
+ const Double_t hiAngSh = (Double_t)TMath::Nint(OuterAngleShift*kRaddeg);
+
+
const Double_t loCorr = 1/TMath::Cos(0.5*loAng*kDegrad);
const Double_t hiCorr = 1/TMath::Cos(0.5*hiAng*kDegrad);
+
+ Double_t rl,ru;
+
+
//
// Get ALICE top node
- Top=gAlice->GetGeometry()->GetNode("alice");
//
- // Inner sectors
+
+ Top=gAlice->GetGeometry()->GetNode("alice");
+
+ // inner sectors
+
+ rl = fTPCParam->GetInnerRadiusLow();
+ ru = fTPCParam->GetInnerRadiusUp();
+
+
for(i=0;i<nLo;i++) {
sprintf(name,"LS%2.2d",i);
- sprintf(title,"TPC low sector %d",i);
- tubs = new TTUBS(name,title,"void",88*loCorr,136*loCorr,250,loAng*(i-0.5),loAng*(i+0.5));
+ name[4]='\0';
+ sprintf(title,"TPC low sector %3d",i);
+ title[24]='\0';
+
+ tubs = new TTUBS(name,title,"void",rl*loCorr,ru*loCorr,250.,
+ loAng*(i-0.5)+loAngSh,loAng*(i+0.5)+loAngSh);
tubs->SetNumberOfDivisions(1);
Top->cd();
Node = new TNode(name,title,name,0,0,0,"");
Node->SetLineColor(kColorTPC);
fNodes->Add(Node);
}
+
// Outer sectors
+
+ rl = fTPCParam->GetOuterRadiusLow();
+ ru = fTPCParam->GetOuterRadiusUp();
+
for(i=0;i<nHi;i++) {
sprintf(name,"US%2.2d",i);
+ name[4]='\0';
sprintf(title,"TPC upper sector %d",i);
- tubs = new TTUBS(name,title,"void",142*hiCorr,250*hiCorr,250,hiAng*(i-0.5),hiAng*(i+0.5));
+ title[24]='\0';
+ tubs = new TTUBS(name,title,"void",rl*hiCorr,ru*hiCorr,250,
+ hiAng*(i-0.5)+hiAngSh,hiAng*(i+0.5)+hiAngSh);
tubs->SetNumberOfDivisions(1);
Top->cd();
Node = new TNode(name,title,name,0,0,0,"");
Node->SetLineColor(kColorTPC);
fNodes->Add(Node);
}
-}
+
+
+}
+
+
+
//_____________________________________________________________________________
Int_t AliTPC::DistancetoPrimitive(Int_t , Int_t )
{
return 9999;
}
-//_____________________________________________________________________________
-//const int MAX_CLUSTER=nrow_low+nrow_up;
-const int MAX_CLUSTER=200;
-const int S_MAXSEC=24;
-const int L_MAXSEC=48;
-const int ROWS_TO_SKIP=21;
-const Float_t MAX_CHI2=12.;
-
-
//_____________________________________________________________________________
static Double_t SigmaY2(Double_t r, Double_t tgl, Double_t pt)
{
//
- // Calculate spread in Y
+ // Parametrised error of the cluster reconstruction (pad direction)
//
pt=TMath::Abs(pt)*1000.;
Double_t x=r/pt;
tgl=TMath::Abs(tgl);
Double_t s=a_rphi - b_rphi*r*tgl + c_rphi*x*x + d_rphi*x;
if (s<0.4e-3) s=0.4e-3;
+ s*=1.3; //Iouri Belikov
return s;
}
static Double_t SigmaZ2(Double_t r, Double_t tgl)
{
//
- // Calculate spread in Z
+ // Parametrised error of the cluster reconstruction (drift direction)
//
tgl=TMath::Abs(tgl);
Double_t s=a_z - b_z*r*tgl + c_z*tgl*tgl;
if (s<0.4e-3) s=0.4e-3;
+ s*=1.3; //Iouri Belikov
return s;
}
//_____________________________________________________________________________
-inline Double_t f1(Double_t x1,Double_t y1, //C
+inline Double_t f1(Double_t x1,Double_t y1,
Double_t x2,Double_t y2,
Double_t x3,Double_t y3)
{
+ //-----------------------------------------------------------------
+ // Initial approximation of the track curvature
//
- // Function f1
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
(y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
//_____________________________________________________________________________
-inline Double_t f2(Double_t x1,Double_t y1, //eta=C*x0
+inline Double_t f2(Double_t x1,Double_t y1,
Double_t x2,Double_t y2,
Double_t x3,Double_t y3)
{
+ //-----------------------------------------------------------------
+ // Initial approximation of the track curvature times center of curvature
//
- // Function f2
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
(y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
}
//_____________________________________________________________________________
-inline Double_t f3(Double_t x1,Double_t y1, //tgl
+inline Double_t f3(Double_t x1,Double_t y1,
Double_t x2,Double_t y2,
Double_t z1,Double_t z2)
{
+ //-----------------------------------------------------------------
+ // Initial approximation of the tangent of the track dip angle
//
- // Function f3
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
}
//_____________________________________________________________________________
-static int FindProlongation(AliTPCtrack& t, const AliTPCSector *sec,
- int s, int ri, int rf=0)
+static Int_t FindProlongation(AliTPCtrack& t, const AliTPCSector *sec,
+ Int_t s, Int_t rf=0)
{
+ //-----------------------------------------------------------------
+ // This function tries to find a track prolongation.
//
- // Propagate track
- //
- int try_again=ROWS_TO_SKIP;
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ const Int_t ROWS_TO_SKIP=(t<10) ? 10 : Int_t(0.5*sec->GetNRows());
+ const Float_t MAX_CHI2=12.;
+ Int_t try_again=ROWS_TO_SKIP;
Double_t alpha=sec->GetAlpha();
- int ns=int(2*TMath::Pi()/alpha)+1;
+ Int_t ns=Int_t(2*TMath::Pi()/alpha+0.5);
- for (int nr=ri; nr>=rf; nr--) {
- Double_t x=sec[s].GetX(nr), ymax=sec[s].GetMaxY(nr);
- if (!t.PropagateTo(x)) return -1;
+ for (Int_t nr=sec->GetRowNumber(t.GetX())-1; nr>=rf; nr--) {
+ Double_t x=sec->GetX(nr), ymax=sec->GetMaxY(nr);
+ if (!t.PropagateTo(x)) return 0;
- const AliTPCcluster *cl=0;
+ AliTPCcluster *cl=0;
Double_t max_chi2=MAX_CHI2;
const AliTPCRow& row=sec[s][nr];
Double_t sy2=SigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
Double_t sz2=SigmaZ2(t.GetX(),t.GetTgl());
- Double_t road=3.*sqrt(t.GetSigmaY2() + 4*sy2), y=t.GetY(), z=t.GetZ();
+ Double_t road=5.*sqrt(t.GetSigmaY2() + sy2), y=t.GetY(), z=t.GetZ();
if (road>30) {
- if (t>3) cerr<<t<<" AliTPCtrack warning: Too broad road !\n";
- return -1;
+ if (t>4) cerr<<t<<" FindProlongation warning: Too broad road !\n";
+ return 0;
}
if (row) {
- for (int i=row.Find(y-road); i<row; i++) {
+ for (Int_t i=row.Find(y-road); i<row; i++) {
AliTPCcluster* c=(AliTPCcluster*)(row[i]);
if (c->fY > y+road) break;
if (c->IsUsed()) continue;
- if ((c->fZ - z)*(c->fZ - z) > 9.*(t.GetSigmaZ2() + 4*sz2)) continue;
+ if ((c->fZ - z)*(c->fZ - z) > 25.*(t.GetSigmaZ2() + sz2)) continue;
Double_t chi2=t.GetPredictedChi2(c);
if (chi2 > max_chi2) continue;
max_chi2=chi2;
}
if (cl) {
t.Update(cl,max_chi2);
+ cl->fdEdX=sec->GetPadPitchWidth()*TMath::Sqrt((1+t.GetTgl()*t.GetTgl())/
+ (1-(t.GetC()*x-t.GetEta())*(t.GetC()*x-t.GetEta())));
try_again=ROWS_TO_SKIP;
} else {
if (try_again==0) break;
if (y > ymax) {
s = (s+1) % ns;
- if (!t.Rotate(alpha)) return -1;
+ if (!t.Rotate(alpha)) return 0;
} else if (y <-ymax) {
- s = (s-1+ns) % ns;
- if (!t.Rotate(-alpha)) return -1;
+ s = (s-1+ns) % ns;
+ if (!t.Rotate(-alpha)) return 0;
}
try_again--;
}
}
- return s;
+ return 1;
+
}
//_____________________________________________________________________________
-static void MakeSeeds(TObjArray& seeds,const AliTPCSector* sec,int i1,int i2,
-const AliTPCParam *p)
+static void MakeSeeds(TObjArray& seeds,const AliTPCSector *sec, Int_t max_sec,
+Int_t i1, Int_t i2)
{
+ //-----------------------------------------------------------------
+ // This function creates track seeds.
//
- // Find seed for tracking
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
TMatrix C(5,5); TVector x(5);
- int max_sec=L_MAXSEC/2;
- for (int ns=0; ns<max_sec; ns++) {
- int nl=sec[(ns-1+max_sec)%max_sec][i2];
- int nm=sec[ns][i2];
- int nu=sec[(ns+1)%max_sec][i2];
- Double_t alpha=sec[ns].GetAlpha();
+ Double_t alpha=sec->GetAlpha(), shift=sec->GetAlphaShift();
+ Double_t cs=cos(alpha), sn=sin(alpha);
+ for (Int_t ns=0; ns<max_sec; ns++) {
+ Int_t nl=sec[(ns-1+max_sec)%max_sec][i2];
+ Int_t nm=sec[ns][i2];
+ Int_t nu=sec[(ns+1)%max_sec][i2];
const AliTPCRow& r1=sec[ns][i1];
- for (int is=0; is < r1; is++) {
- Double_t x1=sec[ns].GetX(i1), y1=r1[is]->fY, z1=r1[is]->fZ;
- for (int js=0; js < nl+nm+nu; js++) {
+ for (Int_t is=0; is < r1; is++) {
+ Double_t x1=sec->GetX(i1), y1=r1[is]->fY, z1=r1[is]->fZ;
+ for (Int_t js=0; js < nl+nm+nu; js++) {
const AliTPCcluster *cl;
- Double_t cs,sn;
- int ks;
-
+ Int_t ks;
+ Double_t x2=sec->GetX(i2), y2, z2, tmp;
+
if (js<nl) {
ks=(ns-1+max_sec)%max_sec;
const AliTPCRow& r2=sec[(ns-1+max_sec)%max_sec][i2];
cl=r2[js];
- cs=cos(alpha); sn=sin(alpha);
+ y2=cl->fY; z2=cl->fZ;
+ tmp= x2*cs+y2*sn;
+ y2 =-x2*sn+y2*cs; x2=tmp;
} else
if (js<nl+nm) {
ks=ns;
const AliTPCRow& r2=sec[ns][i2];
cl=r2[js-nl];
- cs=1; sn=0.;
+ y2=cl->fY; z2=cl->fZ;
} else {
ks=(ns+1)%max_sec;
const AliTPCRow& r2=sec[(ns+1)%max_sec][i2];
cl=r2[js-nl-nm];
- cs=cos(alpha); sn=-sin(alpha);
+ y2=cl->fY; z2=cl->fZ;
+ tmp=x2*cs-y2*sn;
+ y2 =x2*sn+y2*cs; x2=tmp;
}
- Double_t x2=sec[ns].GetX(i2), y2=cl->fY, z2=cl->fZ;
- //if (z1*z2 < 0) continue;
- //if (TMath::Abs(z1) < TMath::Abs(z2)) continue;
-
- Double_t tmp= x2*cs+y2*sn;
- y2 =-x2*sn+y2*cs;
- x2=tmp;
-
+
+ Double_t zz=z1 - z1/x1*(x1-x2);
+ if (TMath::Abs(zz-z2)>5) continue;
+
+ Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
+ if (d==0.) {cerr<<"MakeSeeds warning: Straight seed !\n"; continue;}
+
+ Double_t x3=0., y3=0.;//gRandom->Gaus(0.,TMath::Sqrt(cl->fSigmaY2));
+
x(0)=y1;
x(1)=z1;
- x(2)=f1(x1,y1,x2,y2,0.,0.);
- x(3)=f2(x1,y1,x2,y2,0.,0.);
+ x(2)=f1(x1,y1,x2,y2,x3,y3);
+ x(3)=f2(x1,y1,x2,y2,x3,y3);
x(4)=f3(x1,y1,x2,y2,z1,z2);
if (TMath::Abs(x(2)*x1-x(3)) >= 0.999) continue;
Double_t a=asin(x(3));
Double_t zv=z1 - x(4)/x(2)*(a+asin(x(2)*x1-x(3)));
- if (TMath::Abs(zv)>33.) continue;
+ if (TMath::Abs(zv)>10.) continue;
TMatrix X(6,6); X=0.;
X(0,0)=r1[is]->fSigmaY2; X(1,1)=r1[is]->fSigmaZ2;
X(2,2)=cl->fSigmaY2; X(3,3)=cl->fSigmaZ2;
- X(4,4)=3./12.; X(5,5)=3./12.;
+ X(4,4)=cl->fSigmaY2; X(5,5)=cl->fSigmaZ2;
+ //X(4,4)=3./12.; X(5,5)=3./12.;
TMatrix F(5,6); F.UnitMatrix();
Double_t sy=sqrt(X(0,0)), sz=sqrt(X(1,1));
- F(2,0)=(f1(x1,y1+sy,x2,y2,0.,0.)-x(2))/sy;
- F(2,2)=(f1(x1,y1,x2,y2+sy,0.,0.)-x(2))/sy;
- F(2,4)=(f1(x1,y1,x2,y2,0.,0.+sy)-x(2))/sy;
- F(3,0)=(f2(x1,y1+sy,x2,y2,0.,0.)-x(3))/sy;
- F(3,2)=(f2(x1,y1,x2,y2+sy,0.,0.)-x(3))/sy;
- F(3,4)=(f2(x1,y1,x2,y2,0.,0.+sy)-x(3))/sy;
+ F(2,0)=(f1(x1,y1+sy,x2,y2,x3,y3)-x(2))/sy;
+ F(2,2)=(f1(x1,y1,x2,y2+sy,x3,y3)-x(2))/sy;
+ F(2,4)=(f1(x1,y1,x2,y2,x3,y3+sy)-x(2))/sy;
+ F(3,0)=(f2(x1,y1+sy,x2,y2,x3,y3)-x(3))/sy;
+ F(3,2)=(f2(x1,y1,x2,y2+sy,x3,y3)-x(3))/sy;
+ F(3,4)=(f2(x1,y1,x2,y2,x3,y3+sy)-x(3))/sy;
F(4,0)=(f3(x1,y1+sy,x2,y2,z1,z2)-x(4))/sy;
F(4,1)=(f3(x1,y1,x2,y2,z1+sz,z2)-x(4))/sz;
F(4,2)=(f3(x1,y1,x2,y2+sy,z1,z2)-x(4))/sy;
TMatrix t(F,TMatrix::kMult,X);
C.Mult(t,TMatrix(TMatrix::kTransposed,F));
- TrackSeed *track=new TrackSeed(*(r1[is]),x,C,p);
- int rc=FindProlongation(*track,sec,ns,i1-1,i2);
+ AliTPCtrack *track=new AliTPCtrack(r1[is], x, C, x1, ns*alpha+shift);
+ Int_t rc=FindProlongation(*track,sec,ns,i2);
if (rc<0 || *track<(i1-i2)/2) delete track;
else seeds.AddLast(track);
}
}
//_____________________________________________________________________________
+AliTPCParam *AliTPCSector::param;
void AliTPC::Clusters2Tracks()
{
+ //-----------------------------------------------------------------
+ // This is a track finder.
//
- // TPC Track finder from clusters.
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
if (!fClusters) return;
- AliTPCParam *p=&fDigParam->GetParam();
- Int_t nrow_low=p->GetNRowLow();
- Int_t nrow_up=p->GetNRowUp();
+ AliTPCParam *p=fTPCParam;
+ AliTPCSector::SetParam(p);
- AliTPCSSector ssec[S_MAXSEC/2];
- for (int i=0; i<S_MAXSEC/2; i++) ssec[i].SetUp(p);
+ const Int_t nis=p->GetNInnerSector()/2;
+ AliTPCSSector *ssec=new AliTPCSSector[nis];
+ Int_t nrow_low=ssec->GetNRows();
- AliTPCLSector lsec[L_MAXSEC/2];
- for (int j=0; j<L_MAXSEC/2; j++) lsec[j].SetUp(p);
+ const Int_t nos=p->GetNOuterSector()/2;
+ AliTPCLSector *lsec=new AliTPCLSector[nos];
+ Int_t nrow_up=lsec->GetNRows();
- int ncl=fClusters->GetEntriesFast();
+ Int_t ncl=fClusters->GetEntriesFast();
while (ncl--) {
AliTPCcluster *c=(AliTPCcluster*)fClusters->UncheckedAt(ncl);
+ Int_t sec=c->fSector, row=c->fPadRow;
- int sec=int(c->fSector)-1, row=int(c->fPadRow)-1;
-
- if (sec<24) {
- if (row<0 || row>nrow_low) {cerr<<"low !!!"<<row<<endl; continue;}
- ssec[sec%12][row].InsertCluster(c);
+ if (sec<nis*2) {
+ ssec[sec%nis][row].InsertCluster(c);
} else {
- if (row<0 || row>nrow_up ) {cerr<<"up !!!"<<row<<endl; continue;}
- sec -= 24;
- lsec[sec%24][row].InsertCluster(c);
+ sec -= nis*2;
+ lsec[sec%nos][row].InsertCluster(c);
}
}
-
TObjArray seeds(20000);
- MakeSeeds(seeds,lsec,nrow_up-1,nrow_up-1-8,p);
- MakeSeeds(seeds,lsec,nrow_up-1-4,nrow_up-1-4-8,p);
+
+ Int_t nrows=nrow_low+nrow_up;
+ Int_t gap=Int_t(0.125*nrows), shift=Int_t(0.5*gap);
+ MakeSeeds(seeds, lsec, nos, nrow_up-1, nrow_up-1-gap);
+ MakeSeeds(seeds, lsec, nos, nrow_up-1-shift, nrow_up-1-shift-gap);
seeds.Sort();
-
- int found=0;
- int nseed=seeds.GetEntriesFast();
-
- for (int s=0; s<nseed; s++) {
- AliTPCtrack& t=*((AliTPCtrack*)seeds.UncheckedAt(s));
+
+ Int_t found=0;
+ Int_t nseed=seeds.GetEntriesFast();
+
+ for (Int_t s=0; s<nseed; s++) {
+ AliTPCtrack *pt=(AliTPCtrack*)seeds.UncheckedAt(s), &t=*pt;
Double_t alpha=t.GetAlpha();
if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
if (alpha < 0. ) alpha += 2.*TMath::Pi();
- int ns=int(alpha/lsec->GetAlpha() + 0.5);
-
- Double_t x=t.GetX();
- int nr;
- if (x<p->GetPadRowRadiiUp(nrow_up-1-4-7)) nr=nrow_up-1-4-8;
- else if (x<p->GetPadRowRadiiUp(nrow_up-1-7)) nr=nrow_up-1-8;
- else {cerr<<x<<" =x !!!\n"; continue;}
-
- int ls=FindProlongation(t,lsec,ns,nr-1);
- if (ls<0) continue;
- x=t.GetX(); alpha=lsec[ls].GetAlpha(); //
- Double_t phi=ls*alpha + atan(t.GetY()/x); // Find S-sector
- int ss=int(0.5*(phi/alpha+1)); //
- alpha *= 2*(ss-0.5*ls); // and rotation angle
- if (!t.Rotate(alpha)) continue; //
- ss %= (S_MAXSEC/2); //
+ Int_t ns=Int_t(alpha/lsec->GetAlpha())%nos;
+
+ if (!FindProlongation(t,lsec,ns)) continue;
+
+ alpha=t.GetAlpha() + 0.5*ssec->GetAlpha() - ssec->GetAlphaShift();
+ if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
+ if (alpha < 0. ) alpha += 2.*TMath::Pi();
+ ns=Int_t(alpha/ssec->GetAlpha())%nis; //index of the inner sector needed
+
+ alpha=ns*ssec->GetAlpha() - t.GetAlpha();
+ if (!t.Rotate(alpha)) continue;
- if (FindProlongation(t,ssec,ss,nrow_low-1)<0) continue;
- if (t < 30) continue;
+ if (!FindProlongation(t,ssec,ns)) continue;
- AddTrack(t);
- t.UseClusters();
- cerr<<found++<<'\r';
+ if (t >= Int_t(0.4*nrows)) {
+ AddTrack(t);
+ t.UseClusters();
+ cerr<<found++<<'\r';
+ }
+ delete pt;
}
+
+ delete[] ssec;
+ delete[] lsec;
+
}
//_____________________________________________________________________________
//-----------------------------------------------------------------
// Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
//-----------------------------------------------------------------
-
- AliMC* pMC = AliMC::GetMC();
Int_t ISXFLD=gAlice->Field()->Integ();
Float_t SXMGMX=gAlice->Field()->Max();
+
+ Float_t amat[5]; // atomic numbers
+ Float_t zmat[5]; // z
+ Float_t wmat[5]; // proportions
+
+ Float_t density;
+
+ // ********************* Gases *******************
+
+ //--------------------------------------------------------------
+ // pure gases
+ //--------------------------------------------------------------
+
+ // Ne
+
+
+ Float_t a_ne = 20.18;
+ Float_t z_ne = 10.;
- Float_t absl, radl, a, d, z;
- Float_t dg;
- Float_t x0ne;
- Float_t buf[1];
- Int_t nbuf;
-
- // --- Methane (CH4) ---
- Float_t am[2] = { 12.,1. };
- Float_t zm[2] = { 6.,1. };
- Float_t wm[2] = { 1.,4. };
- Float_t dm = 7.17e-4;
- // --- The Neon CO2 90/10 mixture ---
- Float_t ag[2] = { 20.18 };
- Float_t zg[2] = { 10. };
- Float_t wg[2] = { .8,.2 };
- Float_t dne = 9e-4; // --- Neon density in g/cm3 ---
-
- // --- Mylar (C5H4O2) ---
- Float_t amy[3] = { 12.,1.,16. };
- Float_t zmy[3] = { 6.,1.,8. };
- Float_t wmy[3] = { 5.,4.,2. };
- Float_t dmy = 1.39;
- // --- CO2 ---
- Float_t ac[2] = { 12.,16. };
- Float_t zc[2] = { 6.,8. };
- Float_t wc[2] = { 1.,2. };
- Float_t dc = .001977;
- // --- Carbon density and radiation length ---
- Float_t densc = 2.265;
- Float_t radlc = 18.8;
- // --- Silicon ---
- Float_t asi = 28.09;
- Float_t zsi = 14.;
- Float_t desi = 2.33;
- Float_t radsi = 9.36;
-
- // --- Define the various materials for GEANT ---
- AliMaterial(0, "Al $", 26.98, 13., 2.7, 8.9, 37.2);
- x0ne = 28.94 / dne;
- AliMaterial(1, "Ne $", 20.18, 10., dne, x0ne, 999.);
-
- // -- Methane, defined by the proportions of atoms
-
- AliMixture(2, "Methane$", am, zm, dm, -2, wm);
-
- // --- CO2, defined by the proportion of atoms
-
- AliMixture(7, "CO2$", ac, zc, dc, -2, wc);
+ density = 0.0009;
+
+ AliMaterial(20,"Ne",a_ne,z_ne,density,999.,999.);
+
+ // Ar
+
+ Float_t a_ar = 39.948;
+ Float_t z_ar = 18.;
+
+ density = 0.001782;
+
+ AliMaterial(21,"Ar",a_ar,z_ar,density,999.,999.);
+
+ Float_t a_pure[2];
- // -- Get A,Z etc. for CO2
+ a_pure[0] = a_ne;
+ a_pure[1] = a_ar;
+
+ //--------------------------------------------------------------
+ // gases - compounds
+ //--------------------------------------------------------------
+
+ Float_t amol[3];
+
+ // CO2
+
+ amat[0]=12.011;
+ amat[1]=15.9994;
+
+ zmat[0]=6.;
+ zmat[1]=8.;
+
+ wmat[0]=1.;
+ wmat[1]=2.;
+
+ density=0.001977;
+
+ amol[0] = amat[0]*wmat[0]+amat[1]*wmat[1];
+
+ AliMixture(10,"CO2",amat,zmat,density,-2,wmat);
+
+ // CF4
+
+ amat[0]=12.011;
+ amat[1]=18.998;
+
+ zmat[0]=6.;
+ zmat[1]=9.;
+
+ wmat[0]=1.;
+ wmat[1]=4.;
+
+ density=0.003034;
+
+ amol[1] = amat[0]*wmat[0]+amat[1]*wmat[1];
+
+ AliMixture(11,"CF4",amat,zmat,density,-2,wmat);
+
+ // CH4
+
+ amat[0]=12.011;
+ amat[1]=1.;
+
+ zmat[0]=6.;
+ zmat[1]=1.;
+
+ wmat[0]=1.;
+ wmat[1]=4.;
+
+ density=0.000717;
+
+ amol[2] = amat[0]*wmat[0]+amat[1]*wmat[1];
+
+ AliMixture(12,"CH4",amat,zmat,density,-2,wmat);
+
+ //----------------------------------------------------------------
+ // gases - mixtures, ID >= 20 pure gases, <= 10 ID < 20 -compounds
+ //----------------------------------------------------------------
+
char namate[21];
- pMC->Gfmate((*fIdmate)[7], namate, a, z, d, radl, absl, buf, nbuf);
- ag[1] = a;
- zg[1] = z;
- dg = dne * .9 + dc * .1;
+
+ density = 0.;
+ Float_t am=0;
+ Int_t nc;
+
+ Float_t a,z,rho,absl,X0,buf[1];
+ Int_t nbuf;
+
+ for(nc = 0;nc<fNoComp;nc++)
+ {
+
+ // retrive material constants
+
+ gMC->Gfmate((*fIdmate)[fMixtComp[nc]],namate,a,z,rho,X0,absl,buf,nbuf);
+
+ amat[nc] = a;
+ zmat[nc] = z;
+
+ Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
+
+ am += fMixtProp[nc]*((fMixtComp[nc]>=20) ? a_pure[nnc] : amol[nnc]);
+ density += fMixtProp[nc]*rho; // density of the mixture
+
+ }
+
+ // mixture proportions by weight!
+
+ for(nc = 0;nc<fNoComp;nc++)
+ {
+
+ Int_t nnc = (fMixtComp[nc]>=20) ? fMixtComp[nc]%20 : fMixtComp[nc]%10;
+
+ wmat[nc] = fMixtProp[nc]*((fMixtComp[nc]>=20) ? a_pure[nnc] : amol[nnc])/am;
+
+ }
- // -- Create Ne/CO2 90/10 mixture
+ AliMixture(31,"Drift gas 1",amat,zmat,density,fNoComp,wmat);
+ AliMixture(32,"Drift gas 2",amat,zmat,density,fNoComp,wmat);
+ AliMixture(33,"Drift gas 3",amat,zmat,density,fNoComp,wmat);
+
+ AliMedium(2, "Drift gas 1", 31, 0, ISXFLD, SXMGMX, 10., 999.,.1, .001, .001);
+ AliMedium(3, "Drift gas 2", 32, 0, ISXFLD, SXMGMX, 10., 999.,.1, .001, .001);
+ AliMedium(4, "Drift gas 3", 33, 1, ISXFLD, SXMGMX, 10., 999.,.1, .001, .001);
+
+ // Air
+
+ AliMaterial(24, "Air", 14.61, 7.3, .001205, 30420., 67500.);
+
+ AliMedium(24, "Air", 24, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1);
+
+ //----------------------------------------------------------------------
+ // solid materials
+ //----------------------------------------------------------------------
+
+ // Al
+
+ AliMaterial(30, "Al", 26.98, 13., 2.7, 8.9, 37.2);
+
+ AliMedium(0, "Al",30, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1);
+
+ // Si
+
+ AliMaterial(31, "Si", 28.086, 14.,2.33, 9.36, 999.);
+
+ AliMedium(7, "Al",31, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1);
- AliMixture(3, "Gas-mixt $", ag, zg, dg, 2, wg);
- AliMixture(4, "Gas-mixt $", ag, zg, dg, 2, wg);
+
+ // Mylar C5H4O2
+
+ amat[0]=12.011;
+ amat[1]=1.;
+ amat[2]=15.9994;
+
+ zmat[0]=6.;
+ zmat[1]=1.;
+ zmat[2]=8.;
+
+ wmat[0]=5.;
+ wmat[1]=4.;
+ wmat[2]=2.;
+
+ density = 1.39;
- AliMaterial(5, "G10$", 20., 10., 1.7, 19.4, 999.);
- AliMixture(6, "Mylar$", amy, zmy, dmy, -3, wmy);
+ AliMixture(32, "Mylar",amat,zmat,density,-3,wmat);
+
+ AliMedium(5, "Mylar",32, 0, ISXFLD, SXMGMX, 10., .1, .1, .001, .01);
+
+
+
+
+ // Carbon (normal)
+
+ AliMaterial(33,"C normal",12.011,6.,2.265,18.8,999.);
+
+ AliMedium(6,"C normal",33,0, ISXFLD, SXMGMX, 10., .1, .1, .001, .01);
+
+ // G10 for inner and outr field cage
+ // G10 is 60% SiO2 + 40% epoxy, right now I use A and Z for SiO2
+
+ Float_t rhoFactor;
+
+ amat[0]=28.086;
+ amat[1]=15.9994;
+
+ zmat[0]=14.;
+ zmat[1]=8.;
+
+ wmat[0]=1.;
+ wmat[1]=2.;
+
+ density = 1.7;
- a = ac[0];
- z = zc[0];
- AliMaterial(8, "Carbon", a, z, densc, radlc, 999.);
+
+ AliMixture(34,"G10 aux.",amat,zmat,density,-2,wmat);
+
+
+ gMC->Gfmate((*fIdmate)[34],namate,a,z,rho,X0,absl,buf,nbuf);
+
+ Float_t thickX0 = 0.0052; // field cage in X0 units
- AliMaterial(9, "Silicon", asi, zsi, desi, radsi, 999.);
- AliMaterial(99, "Air$", 14.61, 7.3, .001205, 30420., 67500.);
+ Float_t thick = 2.; // in cm
+
+ X0=19.4; // G10
+
+ rhoFactor = X0*thickX0/thick;
+ density = rho*rhoFactor;
+
+ AliMaterial(35,"G10-fc",a,z,density,999.,999.);
+
+ AliMedium(8,"G10-fc",35,0, ISXFLD, SXMGMX, 10., .1, .1, .001, .01);
+
+ thickX0 = 0.0027; // inner vessel (eta <0.9)
+ thick=0.5;
+ rhoFactor = X0*thickX0/thick;
+ density = rho*rhoFactor;
+
+ AliMaterial(36,"G10-iv",a,z,density,999.,999.);
+
+ AliMedium(9,"G10-iv",36,0, ISXFLD, SXMGMX, 10., .1, .1, .001, .01);
+
+ // Carbon fibre
- AliMedium(400, "Al wall$", 0, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1);
- AliMedium(402, "Gas mix1$", 3, 0, ISXFLD, SXMGMX, 10., .01,.1, .001, .01);
- AliMedium(403, "Gas mix2$", 3, 0, ISXFLD, SXMGMX, 10., .01,.1, .001, .01);
- AliMedium(404, "Gas mix3$", 4, 1, ISXFLD, SXMGMX, 10., .01,.1, .001, .01);
- AliMedium(405, "G10 pln$", 5, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1 );
- AliMedium(406, "Mylar $", 6, 0, ISXFLD, SXMGMX, 10., .01,.1, .001, .01);
- AliMedium(407, "CO2 $", 7, 0, ISXFLD, SXMGMX, 10., .01,.1, .01, .01);
- AliMedium(408, "Carbon $", 8, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1 );
- AliMedium(409, "Silicon$", 9, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1 );
- AliMedium(499, "Air gap$", 99, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1 );
+ gMC->Gfmate((*fIdmate)[33],namate,a,z,rho,X0,absl,buf,nbuf);
+
+ thickX0 = 0.0133; // outer vessel
+ thick=3.0;
+ rhoFactor = X0*thickX0/thick;
+ density = rho*rhoFactor;
+
+
+ AliMaterial(37,"C-ov",a,z,density,999.,999.);
+
+ AliMedium(10,"C-ov",37,0, ISXFLD, SXMGMX, 10., .1, .1, .001, .01);
+
+ thickX0=0.015; // inner vessel (cone, eta > 0.9)
+ thick=1.5;
+ rhoFactor = X0*thickX0/thick;
+ density = rho*rhoFactor;
+
+ AliMaterial(38,"C-ivc",a,z,density,999.,999.);
+
+ AliMedium(11,"C-ivc",38,0, ISXFLD, SXMGMX, 10., .1, .1, .001, .01);
+
+ //
+
+ AliMedium(12,"CO2",10,0, ISXFLD, SXMGMX, 10., 999.,.1, .001, .001);
+
}
//_____________________________________________________________________________
struct Bin {
- const AliTPCdigit *dig;
- int idx;
- Bin() {dig=0; idx=-1;}
+ UShort_t q;
+ UInt_t mask;
+ Bin();
};
+Bin::Bin() {q=0; mask=0xFFFFFFFE;}
-struct PreCluster : public AliTPCcluster {
- const AliTPCdigit* summit;
- int idx;
- int cut;
- int npeaks;
- PreCluster();
+struct Peak {
+ Int_t k;
+ UInt_t mask;
};
-PreCluster::PreCluster() : AliTPCcluster() {cut=npeaks=0;}
+inline Bool_t IsMaximum(Int_t k, Int_t max, const Bin *bins) {
+ UShort_t q=bins[k].q;
+ if (q==1023) return kFALSE;
+ if (bins[k-max].q > q) return kFALSE;
+ if (bins[k-1 ].q > q) return kFALSE;
+ if (bins[k+max].q > q) return kFALSE;
+ if (bins[k+1 ].q > q) return kFALSE;
+ if (bins[k-max-1].q > q) return kFALSE;
+ if (bins[k+max-1].q > q) return kFALSE;
+ if (bins[k+max+1].q > q) return kFALSE;
+ if (bins[k-max+1].q > q) return kFALSE;
+ return kTRUE;
+}
+static void FindPeaks(Int_t k, Int_t max, Bin *bins, Peak *peaks, Int_t& n) {
+//if (n>=31) return;
+ if (n<31)
+ if (IsMaximum(k,max,bins)) {
+ peaks[n].k=k; peaks[n].mask=(2<<n);
+ n++;
+ }
+ bins[k].mask=0;
+ if (bins[k-max].mask&1) FindPeaks(k-max,max,bins,peaks,n);
+ if (bins[k-1 ].mask&1) FindPeaks(k-1 ,max,bins,peaks,n);
+ if (bins[k+max].mask&1) FindPeaks(k+max,max,bins,peaks,n);
+ if (bins[k+1 ].mask&1) FindPeaks(k+1 ,max,bins,peaks,n);
+}
+static void MarkPeak(Int_t k, Int_t max, Bin *bins, UInt_t m) {
+ UShort_t q=bins[k].q;
-//_____________________________________________________________________________
-static void FindCluster(int i, int j, Bin bins[][MAXTPCTBK+2], PreCluster &c)
-{
- //
- // Find clusters
- //
- Bin& b=bins[i][j];
- double q=double(b.dig->fSignal);
+ bins[k].mask |= m;
- if (q<0) { // digit is at the edge of the pad row
- q=-q;
- c.cut=1;
- }
- if (b.idx >= 0 && b.idx != c.idx) {
- c.idx=b.idx;
- c.npeaks++;
- }
-
- if (q > TMath::Abs(c.summit->fSignal)) c.summit=b.dig;
-
+ if (bins[k-max].q <= q)
+ if ((bins[k-max].mask&m) == 0) MarkPeak(k-max,max,bins,m);
+ if (bins[k-1 ].q <= q)
+ if ((bins[k-1 ].mask&m) == 0) MarkPeak(k-1 ,max,bins,m);
+ if (bins[k+max].q <= q)
+ if ((bins[k+max].mask&m) == 0) MarkPeak(k+max,max,bins,m);
+ if (bins[k+1 ].q <= q)
+ if ((bins[k+1 ].mask&m) == 0) MarkPeak(k+1 ,max,bins,m);
+}
+
+static void MakeCluster(Int_t k,Int_t max,Bin *bins,UInt_t m,AliTPCcluster &c){
+ Float_t q=(Float_t)bins[k].q;
+ Int_t i=k/max, j=k-i*max;
c.fY += i*q;
c.fZ += j*q;
c.fSigmaY2 += i*i*q;
c.fSigmaZ2 += j*j*q;
c.fQ += q;
- b.dig = 0; b.idx = c.idx;
-
- if (bins[i-1][j].dig) FindCluster(i-1,j,bins,c);
- if (bins[i][j-1].dig) FindCluster(i,j-1,bins,c);
- if (bins[i+1][j].dig) FindCluster(i+1,j,bins,c);
- if (bins[i][j+1].dig) FindCluster(i,j+1,bins,c);
+ bins[k].mask = 0xFFFFFFFE;
+ if (bins[k-max].mask == m) MakeCluster(k-max,max,bins,m,c);
+ if (bins[k-1 ].mask == m) MakeCluster(k-1 ,max,bins,m,c);
+ if (bins[k+max].mask == m) MakeCluster(k+max,max,bins,m,c);
+ if (bins[k+1 ].mask == m) MakeCluster(k+1 ,max,bins,m,c);
}
//_____________________________________________________________________________
void AliTPC::Digits2Clusters()
{
+ //-----------------------------------------------------------------
+ // This is a simple cluster finder.
//
- // simple TPC cluster finder from digits.
- //
- //
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
-
- const Int_t MAX_PAD=200+2, MAX_BUCKET=MAXTPCTBK+2;
- const Int_t Q_min=60;
- const Int_t THRESHOLD=20;
-
- TTree *t=(TTree*)gDirectory->Get("TreeD0_Param1");
- t->GetBranch("Digits")->SetAddress(&fDigits);
- Int_t sectors_by_rows=(Int_t)t->GetEntries();
-
- int ncls=0;
-
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ AliTPCParam *par = fTPCParam;
+ const Int_t MAXZ=par->GetMaxTBin()+2;
+
+ TTree *t = (TTree *)gDirectory->Get("TreeD_75x40_100x60");
+ AliSimDigits digarr, *dummy=&digarr;
+ t->GetBranch("Segment")->SetAddress(&dummy);
+ Stat_t sectors_by_rows = t->GetEntries();
for (Int_t n=0; n<sectors_by_rows; n++) {
- if (!t->GetEvent(n)) continue;
- Bin bins[MAX_PAD][MAX_BUCKET];
- AliTPCdigit *dig=(AliTPCdigit*)fDigits->UncheckedAt(0);
- Int_t nsec=dig->fSector, nrow=dig->fPadRow;
- Int_t ndigits=fDigits->GetEntriesFast();
-
- int npads; int sign_z;
- if (nsec<25) {
- sign_z=(nsec<13) ? 1 : -1;
- npads=fTPCParam->GetNPadsLow(nrow-1);
- } else {
- sign_z=(nsec<49) ? 1 : -1;
- npads=fTPCParam->GetNPadsUp(nrow-1);
+ t->GetEvent(n);
+ Int_t sec, row;
+ if (!par->AdjustSectorRow(digarr.GetID(),sec,row)) {
+ cerr<<"AliTPC warning: invalid segment ID ! "<<digarr.GetID()<<endl;
+ continue;
}
-
- int ndig;
- for (ndig=0; ndig<ndigits; ndig++) {
- dig=(AliTPCdigit*)fDigits->UncheckedAt(ndig);
- int i=dig->fPad, j=dig->fTime;
- if (dig->fSignal >= THRESHOLD) bins[i][j].dig=dig;
- if (i==1 || i==npads || j==1 || j==MAXTPCTBK) dig->fSignal*=-1;
+
+ Float_t rx=par->GetPadRowRadii(sec,row);
+
+ Int_t npads, sign;
+ {
+ Int_t nis=par->GetNInnerSector(), nos=par->GetNOuterSector();
+ if (sec < nis) {
+ npads = par->GetNPadsLow(row);
+ sign = (sec < nis/2) ? 1 : -1;
+ } else {
+ npads = par->GetNPadsUp(row);
+ sign = ((sec-nis) < nos/2) ? 1 : -1;
+ }
}
-
- int ncl=0;
- int i,j;
-
- for (i=1; i<MAX_PAD-1; i++) {
- for (j=1; j<MAX_BUCKET-1; j++) {
- if (bins[i][j].dig == 0) continue;
- PreCluster c; c.summit=bins[i][j].dig; c.idx=ncls;
- FindCluster(i, j, bins, c);
- c.fY /= c.fQ;
- c.fZ /= c.fQ;
-
- double s2 = c.fSigmaY2/c.fQ - c.fY*c.fY;
- c.fSigmaY2 = s2 + 1./12.;
- c.fSigmaY2 *= fTPCParam->GetPadPitchWidth()*
- fTPCParam->GetPadPitchWidth();
- if (s2 != 0.) c.fSigmaY2 *= 0.022*8*4;
-
- s2 = c.fSigmaZ2/c.fQ - c.fZ*c.fZ;
- c.fSigmaZ2 = s2 + 1./12.;
- c.fSigmaZ2 *= fTPCParam->GetZWidth()*fTPCParam->GetZWidth();
- if (s2 != 0.) c.fSigmaZ2 *= 0.068*4*4;
-
- c.fY = (c.fY - 0.5 - 0.5*npads)*fTPCParam->GetPadPitchWidth();
- c.fZ = fTPCParam->GetZWidth()*(c.fZ+1);
- c.fZ -= 3.*fTPCParam->GetZSigma(); // PASA delay
- c.fZ = sign_z*(z_end - c.fZ);
- //c.fZ += 0.023;
- c.fSector=nsec;
- c.fPadRow=nrow;
- c.fTracks[0]=c.summit->fTracks[0];
- c.fTracks[1]=c.summit->fTracks[1];
- c.fTracks[2]=c.summit->fTracks[2];
-
- if (c.cut) {
- c.fSigmaY2 *= 25.;
- c.fSigmaZ2 *= 4.;
- }
-
- AddCluster(c); ncls++; ncl++;
+
+ const Int_t MAXBIN=MAXZ*(npads+2);
+ Bin *bins=new Bin[MAXBIN];
+
+ digarr.First();
+ do {
+ Short_t dig=digarr.CurrentDigit();
+ if (dig<=par->GetZeroSup()) continue;
+ Int_t j=digarr.CurrentRow()+1, i=digarr.CurrentColumn()+1;
+ bins[i*MAXZ+j].q=dig;
+ bins[i*MAXZ+j].mask=1;
+ } while (digarr.Next());
+
+ Int_t ncl=0;
+ for (Int_t i=0; i<MAXBIN; i++) {
+ if ((bins[i].mask&1) == 0) continue;
+ Peak peaks[32]; Int_t npeaks=0;
+ FindPeaks(i, MAXZ, bins, peaks, npeaks);
+
+ if (npeaks>30) continue;
+
+ Int_t k,l;
+ for (k=0; k<npeaks-1; k++){//mark adjacent peaks
+ if (peaks[k].k < 0) continue; //this peak is already removed
+ for (l=k+1; l<npeaks; l++) {
+ if (peaks[l].k < 0) continue; //this peak is already removed
+ Int_t ki=peaks[k].k/MAXZ, kj=peaks[k].k - ki*MAXZ;
+ Int_t li=peaks[l].k/MAXZ, lj=peaks[l].k - li*MAXZ;
+ Int_t di=TMath::Abs(ki - li);
+ Int_t dj=TMath::Abs(kj - lj);
+ if (di>1 || dj>1) continue;
+ if (bins[peaks[k].k].q > bins[peaks[l].k].q) {
+ peaks[l].mask=peaks[k].mask;
+ peaks[l].k*=-1;
+ } else {
+ peaks[k].mask=peaks[l].mask;
+ peaks[k].k*=-1;
+ break;
+ }
+ }
}
- }
-
- for (ndig=0; ndig<ndigits; ndig++) {
- dig=(AliTPCdigit*)fDigits->UncheckedAt(ndig);
- if (TMath::Abs(dig->fSignal) >= 0)
- bins[dig->fPad][dig->fTime].dig=dig;
- }
-
- for (i=1; i<MAX_PAD-1; i++) {
- for (j=1; j<MAX_BUCKET-1; j++) {
- if (bins[i][j].dig == 0) continue;
- PreCluster c; c.summit=bins[i][j].dig; c.idx=ncls;
- FindCluster(i, j, bins, c);
- if (c.fQ <= Q_min) continue; //noise cluster
- if (c.npeaks>1) continue; //overlapped cluster
- c.fY /= c.fQ;
- c.fZ /= c.fQ;
-
- double s2 = c.fSigmaY2/c.fQ - c.fY*c.fY;
- c.fSigmaY2 = s2 + 1./12.;
- c.fSigmaY2 *= fTPCParam->GetPadPitchWidth()*
- fTPCParam->GetPadPitchWidth();
- if (s2 != 0.) c.fSigmaY2 *= 0.022*4*0.6*4;
-
- s2 = c.fSigmaZ2/c.fQ - c.fZ*c.fZ;
- c.fSigmaZ2 = s2 + 1./12.;
- c.fSigmaZ2 *= fTPCParam->GetZWidth()*fTPCParam->GetZWidth();
- if (s2 != 0.) c.fSigmaZ2 *= 0.068*4*0.4;
-
- c.fY = (c.fY - 0.5 - 0.5*npads)*fTPCParam->GetPadPitchWidth();
- c.fZ = fTPCParam->GetZWidth()*(c.fZ+1);
- c.fZ -= 3.*fTPCParam->GetZSigma(); // PASA delay
- c.fZ = sign_z*(z_end - c.fZ);
- //c.fZ += 0.023;
- c.fSector=nsec;
- c.fPadRow=nrow;
- c.fTracks[0]=c.summit->fTracks[0];
- c.fTracks[1]=c.summit->fTracks[1];
- c.fTracks[2]=c.summit->fTracks[2];
-
- if (c.cut) {
- c.fSigmaY2 *= 25.;
- c.fSigmaZ2 *= 4.;
- }
-
- if (c.npeaks==0) {AddCluster(c); ncls++; ncl++;}
- else {
- new ((*fClusters)[c.idx]) AliTPCcluster(c);
- }
+
+ for (k=0; k<npeaks; k++) {
+ MarkPeak(TMath::Abs(peaks[k].k), MAXZ, bins, peaks[k].mask);
+ }
+
+ for (k=0; k<npeaks; k++) {
+ if (peaks[k].k < 0) continue; //removed peak
+ AliTPCcluster c;
+ MakeCluster(peaks[k].k, MAXZ, bins, peaks[k].mask, c);
+ if (c.fQ < 5) continue; //noise cluster
+ c.fY /= c.fQ;
+ c.fZ /= c.fQ;
+
+ Double_t s2 = c.fSigmaY2/c.fQ - c.fY*c.fY;
+ c.fSigmaY2 = s2 + 1./12.;
+ c.fSigmaY2 *= par->GetPadPitchWidth(sec)*par->GetPadPitchWidth(sec);
+ if (s2 != 0.) {
+ c.fSigmaY2 *= 0.064*1.3*1.3;
+ if (sec<par->GetNInnerSector()) c.fSigmaY2 *= 1.44*1.44;
+ }
+
+ s2 = c.fSigmaZ2/c.fQ - c.fZ*c.fZ;
+ c.fSigmaZ2 = s2 + 1./12.;
+ c.fSigmaZ2 *= par->GetZWidth()*par->GetZWidth();
+ if (s2 != 0.) {
+ c.fSigmaZ2 *= 0.10*1.3*1.3;
+ if (sec<par->GetNInnerSector()) c.fSigmaZ2 *= 1.33*1.33;
+ }
+
+ c.fY = (c.fY - 0.5 - 0.5*npads)*par->GetPadPitchWidth(sec);
+ c.fZ = par->GetZWidth()*(c.fZ-1);
+ c.fZ -= 3.*par->GetZSigma(); // PASA delay
+ c.fZ = sign*(z_end - c.fZ);
+
+ if (rx<230./250.*TMath::Abs(c.fZ)) continue;
+
+ c.fSector=sec;
+ c.fPadRow=row;
+ Int_t ki=peaks[k].k/MAXZ, kj=peaks[k].k - ki*MAXZ;
+ c.fTracks[0]=digarr.GetTrackID(kj-1,ki-1,0);
+ c.fTracks[1]=digarr.GetTrackID(kj-1,ki-1,1);
+ c.fTracks[2]=digarr.GetTrackID(kj-1,ki-1,2);
+
+ c.fQ=bins[peaks[k].k].q;
+
+ if (ki==1 || ki==npads || kj==1 || kj==MAXZ-2) {
+ c.fSigmaY2 *= 25.;
+ c.fSigmaZ2 *= 4.;
+ }
+
+ AddCluster(c); ncl++;
}
}
-
- cerr<<"sector, row, digits, clusters: "
- <<nsec<<' '<<nrow<<' '<<ndigits<<' '<<ncl<<" \r";
-
- fDigits->Clear();
-
- }
-}
-
-//_____________________________________________________________________________
-void AliTPC::ElDiff(Float_t *xyz)
-{
- //--------------------------------------------------
- // calculates the diffusion of a single electron
- //--------------------------------------------------
-
- //-----------------------------------------------------------------
- // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
- //-----------------------------------------------------------------
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- Float_t driftl;
-
- Float_t z0=xyz[2];
-
- driftl=z_end-TMath::Abs(xyz[2]);
-
- if(driftl<0.01) driftl=0.01;
-
- // check the attachment
-
- driftl=TMath::Sqrt(driftl);
- // Float_t sig_t = driftl*diff_t;
- //Float_t sig_l = driftl*diff_l;
- Float_t sig_t = driftl*fTPCParam->GetDiffT();
- Float_t sig_l = driftl*fTPCParam->GetDiffL();
- xyz[0]=gRandom->Gaus(xyz[0],sig_t);
- xyz[1]=gRandom->Gaus(xyz[1],sig_t);
- xyz[2]=gRandom->Gaus(xyz[2],sig_l);
-
- if (TMath::Abs(xyz[2])>z_end){
- xyz[2]=TMath::Sign(z_end,z0);
+ cerr<<"sector, row, compressed digits, clusters: "
+ <<sec<<' '<<row<<' '<<digarr.GetSize()<<' '<<ncl<<" \r";
+
+ delete[] bins;
}
- if(xyz[2]*z0 < 0.){
- Float_t eps = 0.0001;
- xyz[2]=TMath::Sign(eps,z0);
- }
}
//_____________________________________________________________________________
//-----------------------------------------------------------------
// Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
//-----------------------------------------------------------------
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
+
+ if(fTPCParam == 0){
+ printf("AliTPCParam MUST be created firstly\n");
+ return;
+ }
+
Float_t sigma_rphi,sigma_z,cl_rphi,cl_z;
//
TParticle *particle; // pointer to a given particle
Stat_t ntracks = TH->GetEntries();
//------------------------------------------------------------
- // Loop over all sectors (72 sectors)
- // Sectors 1-24 are lower sectors, 1-12 z>0, 13-24 z<0
- // Sectors 25-72 are upper sectors, 25-48 z>0, 49-72 z<0
+ // Loop over all sectors (72 sectors for 20 deg
+ // segmentation for both lower and upper sectors)
+ // Sectors 0-35 are lower sectors, 0-17 z>0, 17-35 z<0
+ // Sectors 36-71 are upper sectors, 36-53 z>0, 54-71 z<0
//
- // First cluster for sector 1 starts at "0"
+ // First cluster for sector 0 starts at "0"
//------------------------------------------------------------
-
-
- fClustersIndex[0] = 0;
-
- //
- for(Int_t isec=1;isec<fNsectors+1;isec++){
+
+ for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++){
//MI change
- fTPCParam->AdjustAngles(isec,cph,sph);
+ fTPCParam->AdjustCosSin(isec,cph,sph);
//------------------------------------------------------------
// Loop over tracks
//
for(Int_t hit=0;hit<nhits;hit++){
tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
+ if (tpcHit->fQ == 0.) continue; //information about track (I.Belikov)
sector=tpcHit->fSector; // sector number
if(sector != isec) continue; //terminate iteration
ipart=tpcHit->fTrack;
// smearing --> rotate to the 1 (13) or to the 25 (49) sector,
// then the inaccuracy in a X-Y plane is only along Y (pad row)!
//
- Float_t xprim= tpcHit->fX*cph + tpcHit->fY*sph;
+ //Float_t xprim= tpcHit->fX*cph + tpcHit->fY*sph;
Float_t yprim=-tpcHit->fX*sph + tpcHit->fY*cph;
xyz[0]=gRandom->Gaus(yprim,TMath::Sqrt(sigma_rphi)); // y
- Double_t alpha=(sector<25) ? alpha_low : alpha_up;
- if (TMath::Abs(xyz[0]/xprim) > TMath::Tan(0.5*alpha)) xyz[0]=yprim;
xyz[1]=gRandom->Gaus(tpcHit->fZ,TMath::Sqrt(sigma_z)); // z
- if (TMath::Abs(xyz[1]) > 250) xyz[1]=tpcHit->fZ;
xyz[2]=tpcHit->fQ; // q
xyz[3]=sigma_rphi; // fSigmaY2
xyz[4]=sigma_z; // fSigmaZ2
- //find row number
- //MI we must change
- Int_t row = fTPCParam->GetPadRow(sector,xprim) ;
- // and finally add the cluster
- Int_t tracks[5]={tpcHit->fTrack, -1, -1, sector, row+1};
+ Int_t tracks[5]={tpcHit->fTrack, -1, -1, sector, tpcHit->fPadRow};
AddCluster(xyz,tracks);
} // end of loop over hits
- } // end of loop over tracks
+ } // end of loop over tracks
- fClustersIndex[isec] = fNclusters; // update clusters index
-
- } // end of loop over sectors
+ } // end of loop over sectors
- fClustersIndex[fNsectors]--; // set end of the clusters buffer
+} // end of function
+
+//_________________________________________________________________
+void AliTPC::Hits2ExactClustersSector(Int_t isec)
+{
+ //--------------------------------------------------------
+ //calculate exact cross point of track and given pad row
+ //resulting values are expressed in "digit" coordinata
+ //--------------------------------------------------------
+
+ //-----------------------------------------------------------------
+ // Origin: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
+ //-----------------------------------------------------------------
+ //
+ if (fClustersArray==0){
+ return;
+ }
+ //
+ TParticle *particle; // pointer to a given particle
+ AliTPChit *tpcHit; // pointer to a sigle TPC hit
+ TClonesArray *Particles; //pointer to the particle list
+ Int_t sector,nhits;
+ Int_t ipart;
+ const Int_t cmaxhits=30000;
+ TVector * xxxx = new TVector(cmaxhits*4);
+ TVector & xxx = *xxxx;
+ Int_t maxhits = cmaxhits;
+ //construct array for each padrow
+ for (Int_t i=0; i<fTPCParam->GetNRow(isec);i++)
+ fClustersArray->CreateRow(isec,i);
+
+ //---------------------------------------------------------------
+ // Get the access to the tracks
+ //---------------------------------------------------------------
+ TTree *TH = gAlice->TreeH();
+ Stat_t ntracks = TH->GetEntries();
+ Particles=gAlice->Particles();
+ Int_t npart = Particles->GetEntriesFast();
+
+ //------------------------------------------------------------
+ // Loop over tracks
+ //------------------------------------------------------------
+
+ for(Int_t track=0;track<ntracks;track++){
+ ResetHits();
+ TH->GetEvent(track);
+ //
+ // Get number of the TPC hits and a pointer
+ // to the particles
+ //
+ nhits=fHits->GetEntriesFast();
+ //
+ // Loop over hits
+ //
+ Int_t currentIndex=0;
+ Int_t lastrow=-1; //last writen row
+ for(Int_t hit=0;hit<nhits;hit++){
+ tpcHit=(AliTPChit*)fHits->UncheckedAt(hit);
+ if (tpcHit==0) continue;
+ sector=tpcHit->fSector; // sector number
+ if(sector != isec) continue;
+ ipart=tpcHit->fTrack;
+ if (ipart<npart) particle=(TParticle*)Particles->UncheckedAt(ipart);
+
+ //find row number
+
+ Float_t x[3]={tpcHit->fX,tpcHit->fY,tpcHit->fZ};
+ Int_t index[3]={1,isec,0};
+ Int_t currentrow = fTPCParam->GetPadRow(x,index) ;
+ if (currentrow<0) continue;
+ if (lastrow<0) lastrow=currentrow;
+ if (currentrow==lastrow){
+ if ( currentIndex>=maxhits){
+ maxhits+=cmaxhits;
+ xxx.ResizeTo(4*maxhits);
+ }
+ xxx(currentIndex*4)=x[0];
+ xxx(currentIndex*4+1)=x[1];
+ xxx(currentIndex*4+2)=x[2];
+ xxx(currentIndex*4+3)=tpcHit->fQ;
+ currentIndex++;
+ }
+ else
+ if (currentIndex>2){
+ Float_t sumx=0;
+ Float_t sumx2=0;
+ Float_t sumx3=0;
+ Float_t sumx4=0;
+ Float_t sumy=0;
+ Float_t sumxy=0;
+ Float_t sumx2y=0;
+ Float_t sumz=0;
+ Float_t sumxz=0;
+ Float_t sumx2z=0;
+ Float_t sumq=0;
+ for (Int_t index=0;index<currentIndex;index++){
+ Float_t x,x2,x3,x4;
+ x=x2=x3=x4=xxx(index*4);
+ x2*=x;
+ x3*=x2;
+ x4*=x3;
+ sumx+=x;
+ sumx2+=x2;
+ sumx3+=x3;
+ sumx4+=x4;
+ sumy+=xxx(index*4+1);
+ sumxy+=xxx(index*4+1)*x;
+ sumx2y+=xxx(index*4+1)*x2;
+ sumz+=xxx(index*4+2);
+ sumxz+=xxx(index*4+2)*x;
+ sumx2z+=xxx(index*4+2)*x2;
+ sumq+=xxx(index*4+3);
+ }
+ Float_t CentralPad = (fTPCParam->GetNPads(isec,lastrow)-1)/2;
+ Float_t det=currentIndex*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumx*sumx4-sumx2*sumx3)+
+ sumx2*(sumx*sumx3-sumx2*sumx2);
+
+ Float_t detay=sumy*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxy*sumx4-sumx2y*sumx3)+
+ sumx2*(sumxy*sumx3-sumx2y*sumx2);
+ Float_t detaz=sumz*(sumx2*sumx4-sumx3*sumx3)-sumx*(sumxz*sumx4-sumx2z*sumx3)+
+ sumx2*(sumxz*sumx3-sumx2z*sumx2);
+
+ Float_t detby=currentIndex*(sumxy*sumx4-sumx2y*sumx3)-sumy*(sumx*sumx4-sumx2*sumx3)+
+ sumx2*(sumx*sumx2y-sumx2*sumxy);
+ Float_t detbz=currentIndex*(sumxz*sumx4-sumx2z*sumx3)-sumz*(sumx*sumx4-sumx2*sumx3)+
+ sumx2*(sumx*sumx2z-sumx2*sumxz);
+
+ Float_t y=detay/det+CentralPad;
+ Float_t z=detaz/det;
+ Float_t by=detby/det; //y angle
+ Float_t bz=detbz/det; //z angle
+ sumy/=Float_t(currentIndex);
+ sumz/=Float_t(currentIndex);
+ AliCluster cl;
+ cl.fX=z;
+ cl.fY=y;
+ cl.fQ=sumq;
+ cl.fSigmaX2=bz;
+ cl.fSigmaY2=by;
+ cl.fTracks[0]=ipart;
+
+ AliTPCClustersRow * row = (fClustersArray->GetRow(isec,lastrow));
+ if (row!=0) row->InsertCluster(&cl);
+ currentIndex=0;
+ lastrow=currentrow;
+ } //end of calculating cluster for given row
+
+
+
+ } // end of loop over hits
+ } // end of loop over tracks
+ //write padrows to tree
+ for (Int_t ii=0; ii<fTPCParam->GetNRow(isec);ii++) {
+ fClustersArray->StoreRow(isec,ii);
+ fClustersArray->ClearRow(isec,ii);
+ }
+ xxxx->Delete();
+
}
-
+//__________________________________________________________________
void AliTPC::Hits2Digits()
{
-
//----------------------------------------------------
- // Loop over all sectors (72 sectors)
- // Sectors 1-24 are lower sectors, 1-12 z>0, 13-24 z<0
- // Sectors 25-72 are upper sectors, 25-48 z>0, 49-72 z<0
- //----
- for(Int_t isec=1;isec<fNsectors+1;isec++) Hits2DigitsSector(isec);
+ // Loop over all sectors
+ //----------------------------------------------------
+
+ if(fTPCParam == 0){
+ printf("AliTPCParam MUST be created firstly\n");
+ return;
+ }
+
+ for(Int_t isec=0;isec<fTPCParam->GetNSector();isec++) Hits2DigitsSector(isec);
+
}
// Get the access to the track hits
//-------------------------------------------------------
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
+
TTree *TH = gAlice->TreeH(); // pointer to the hits tree
Stat_t ntracks = TH->GetEntries();
// Only if there are any tracks...
//-------------------------------------------
-
- // TObjArrays for three neighouring pad-rows
-
- TObjArray **rowTriplet = new TObjArray* [3];
-
- // TObjArray-s for each pad-row
-
TObjArray **row;
-
- for (Int_t trip=0;trip<3;trip++){
- rowTriplet[trip]=new TObjArray;
- }
-
-
printf("*** Processing sector number %d ***\n",isec);
// row[i] is the pointer to the TObjArray of TVectors,
// each one containing electrons accepted on this
// row, assigned into tracks
- //--------------------------------------------------------
-
- Int_t i;
-
- for (i=0;i<nrows;i++){
-
- // Triplets for i = 0 and i=1 are identical!
- // The same for i = nrows-1 and nrows!
-
- if(i != 1 && i != nrows-1){
- MakeTriplet(i,rowTriplet,row);
- }
-
- DigitizeRow(i,isec,rowTriplet);
-
- fDigParam->Fill();
-
- Int_t ndig=fDigParam->GetArray()->GetEntriesFast();
-
- printf("*** Sector, row, digits %d %d %d ***\n",isec,i,ndig);
-
- ResetDigits(); // reset digits for this row after storing them
-
- } // end of the sector digitization
-
- // delete the last triplet
-
- for (i=0;i<3;i++) rowTriplet[i]->Delete();
-
- delete [] row; // delete the array of pointers to TObjArray-s
-
- } // ntracks >0
-} // end of Hits2Digits
-//_____________________________________________________________________________
-void AliTPC::MakeTriplet(Int_t row,
- TObjArray **rowTriplet, TObjArray **prow)
-{
- //------------------------------------------------------------------
- // Makes the "triplet" of the neighbouring pad-row for the
- // digitization including the cross-talk between the pad-rows
- //------------------------------------------------------------------
-
- //-----------------------------------------------------------------
- // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
- //-----------------------------------------------------------------
-
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- Float_t gasgain = fTPCParam->GetGasGain();
- Int_t nTracks[3];
-
- Int_t nElements,nElectrons;
-
- TVector *pv;
- TVector *tv;
-
- //-------------------------------------------------------------------
- // pv is an "old" track, i.e. label + triplets of (x,y,z)
- // for each electron
- //
- //-------------------------------------------------------------------
-
-
- Int_t i1,i2;
- Int_t nel,nt;
-
- if(row == 0 || row == 1){
-
- // create entire triplet for the first AND the second row
-
- nTracks[0] = prow[0]->GetEntries();
- nTracks[1] = prow[1]->GetEntries();
- nTracks[2] = prow[2]->GetEntries();
-
- for(i1=0;i1<3;i1++){
- nt = nTracks[i1]; // number of tracks for this row
-
- for(i2=0;i2<nt;i2++){
- pv = (TVector*)prow[i1]->At(i2);
- TVector &v1 = *pv;
- nElements = pv->GetNrows();
- nElectrons = (nElements-1)/3;
-
- tv = new TVector(4*nElectrons+1); // create TVector for a modified track
- TVector &v2 = *tv;
- v2(0)=v1(0); //track label
-
- for(nel=0;nel<nElectrons;nel++){
- Int_t idx1 = nel*3;
- Int_t idx2 = nel*4;
- // Avalanche, including fluctuations
- Int_t aval = (Int_t) (-gasgain*TMath::Log(gRandom->Rndm()));
- v2(idx2+1)= v1(idx1+1);
- v2(idx2+2)= v1(idx1+2);
- v2(idx2+3)= v1(idx1+3);
- v2(idx2+4)= (Float_t)aval; // in number of electrons!
- } // end of loop over electrons
- //
- // Add this track to a row
- //
-
- rowTriplet[i1]->Add(tv);
-
-
- } // end of loop over tracks for this row
-
- prow[i1]->Delete(); // remove "old" tracks
- delete prow[i1]; // delete TObjArray for this row
- prow[i1]=0; // set pointer to NULL
-
- } // end of loop over row triplets
-
-
- }
- else{
-
- rowTriplet[0]->Delete(); // remove old lower row
-
- nTracks[0]=rowTriplet[1]->GetEntries(); // previous middle row
- nTracks[1]=rowTriplet[2]->GetEntries(); // previous upper row
- nTracks[2]=prow[row+1]->GetEntries(); // next row
-
-
- //-------------------------------------------
- // shift new tracks downwards
- //-------------------------------------------
-
- for(i1=0;i1<nTracks[0];i1++){
- pv=(TVector*)rowTriplet[1]->At(i1);
- rowTriplet[0]->Add(pv);
- }
-
- rowTriplet[1]->Clear(); // leave tracks on the heap!!!
-
- for(i1=0;i1<nTracks[1];i1++){
- pv=(TVector*)rowTriplet[2]->At(i1);
- rowTriplet[1]->Add(pv);
- }
-
- rowTriplet[2]->Clear(); // leave tracks on the heap!!!
-
- //---------------------------------------------
- // Create new upper row
- //---------------------------------------------
-
-
-
- for(i1=0;i1<nTracks[2];i1++){
- pv = (TVector*)prow[row+1]->At(i1);
- TVector &v1 = *pv;
- nElements = pv->GetNrows();
- nElectrons = (nElements-1)/3;
-
- tv = new TVector(4*nElectrons+1); // create TVector for a modified track
- TVector &v2 = *tv;
- v2(0)=v1(0); //track label
-
- for(nel=0;nel<nElectrons;nel++){
-
- Int_t idx1 = nel*3;
- Int_t idx2 = nel*4;
- // Avalanche, including fluctuations
- Int_t aval = (Int_t)
- (-gasgain*TMath::Log(gRandom->Rndm()));
-
- v2(idx2+1)= v1(idx1+1);
- v2(idx2+2)= v1(idx1+2);
- v2(idx2+3)= v1(idx1+3);
- v2(idx2+4)= (Float_t)aval; // in number of electrons!
- } // end of loop over electrons
-
- rowTriplet[2]->Add(tv);
-
- } // end of loop over tracks
-
- prow[row+1]->Delete(); // delete tracks for this row
- delete prow[row+1]; // delete TObjArray for this row
- prow[row+1]=0; // set a pointer to NULL
-
- }
-
-} // end of MakeTriplet
-//_____________________________________________________________________________
-void AliTPC::ExB(Float_t *xyz)
-{
- //------------------------------------------------
- // ExB at the wires and wire number calulation
- //------------------------------------------------
-
- //-----------------------------------------------------------------
- // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
- //-----------------------------------------------------------------
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
-
- Float_t x1=xyz[0];
- fTPCParam->GetWire(x1); //calculate nearest wire position
- Float_t dx=xyz[0]-x1;
- xyz[1]+=dx*fTPCParam->GetOmegaTau();
-
-} // end of ExB
-//_____________________________________________________________________________
-void AliTPC::DigitizeRow(Int_t irow,Int_t isec,TObjArray **rowTriplet)
-{
- //-----------------------------------------------------------
- // Single row digitization, coupling from the neighbouring
- // rows taken into account
- //-----------------------------------------------------------
-
- //-----------------------------------------------------------------
- // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
- //-----------------------------------------------------------------
-
-
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- Float_t chipgain= fTPCParam->GetChipGain();
- Float_t zerosup = fTPCParam->GetZeroSup();
- Int_t nrows =fTPCParam->GetNRow(isec);
-
- Int_t nTracks[3];
- Int_t n_of_pads[3];
- Int_t IndexRange[4];
- Int_t i1;
- Int_t iFlag;
-
- //
- // iFlag = 0 -> inner row, iFlag = 1 -> the middle one, iFlag = 2 -> the outer one
- //
-
- nTracks[0]=rowTriplet[0]->GetEntries(); // lower row
- nTracks[1]=rowTriplet[1]->GetEntries(); // middle row
- nTracks[2]=rowTriplet[2]->GetEntries(); // upper row
-
-
- if(irow == 0){
- iFlag=0;
- n_of_pads[0]=fTPCParam->GetNPads(isec,0);
- n_of_pads[1]=fTPCParam->GetNPads(isec,1);
- }
- else if(irow == nrows-1){
- iFlag=2;
- n_of_pads[1]=fTPCParam->GetNPads(isec,irow-1);
- n_of_pads[2]=fTPCParam->GetNPads(isec,irow);
- }
- else {
- iFlag=1;
- for(i1=0;i1<3;i1++){
- n_of_pads[i1]=fTPCParam->GetNPads(isec,irow-1+i1);
- }
- }
-
- //
- // Integrated signal for this row
- // and a single track signal
- //
-
- TMatrix *m1 = new TMatrix(1,n_of_pads[iFlag],1,MAXTPCTBK); // integrated
- TMatrix *m2 = new TMatrix(1,n_of_pads[iFlag],1,MAXTPCTBK); // single
-
- //
-
- TMatrix &Total = *m1;
-
- // Array of pointers to the label-signal list
-
- Int_t NofDigits = n_of_pads[iFlag]*MAXTPCTBK; // number of digits for this row
-
- Float_t **pList = new Float_t* [NofDigits];
-
- Int_t lp;
-
- for(lp=0;lp<NofDigits;lp++)pList[lp]=0; // set all pointers to NULL
-
- //
- // Straight signal and cross-talk, cross-talk is integrated over all
- // tracks and added to the signal at the very end
- //
-
+ //--------------------------------------------------------
- for (i1=0;i1<nTracks[iFlag];i1++){
+ Int_t i;
- m2->Zero(); // clear single track signal matrix
-
- Float_t TrackLabel =
- GetSignal(rowTriplet[iFlag],i1,n_of_pads[iFlag],m2,m1,IndexRange);
+ if (fDigitsArray->GetTree()==0) fDigitsArray->MakeTree();
- GetList(TrackLabel,n_of_pads[iFlag],m2,IndexRange,pList);
+ for (i=0;i<nrows;i++){
- }
+ AliDigits * dig = fDigitsArray->CreateRow(isec,i);
- //
- // Cross talk from the neighbouring pad-rows
- //
+ DigitizeRow(i,isec,row);
- TMatrix *m3 = new TMatrix(1,n_of_pads[iFlag],1,MAXTPCTBK); // cross-talk
+ fDigitsArray->StoreRow(isec,i);
- TMatrix &Cross = *m3;
+ Int_t ndig = dig->GetSize();
+
+ printf("*** Sector, row, compressed digits %d %d %d ***\n",isec,i,ndig);
+
+ fDigitsArray->ClearRow(isec,i);
- if(iFlag == 0){
+
+ } // end of the sector digitization
- // cross-talk from the outer row only (first pad row)
+ for(i=0;i<nrows;i++){
+ row[i]->Delete();
+ }
+
+ delete [] row; // delete the array of pointers to TObjArray-s
+
+ } // ntracks >0
- GetCrossTalk(0,rowTriplet[1],nTracks[1],n_of_pads,m3);
+} // end of Hits2DigitsSector
- }
- else if(iFlag == 2){
- // cross-talk from the inner row only (last pad row)
+//_____________________________________________________________________________
+void AliTPC::DigitizeRow(Int_t irow,Int_t isec,TObjArray **rows)
+{
+ //-----------------------------------------------------------
+ // Single row digitization, coupling from the neighbouring
+ // rows taken into account
+ //-----------------------------------------------------------
- GetCrossTalk(2,rowTriplet[1],nTracks[1],n_of_pads,m3);
+ //-----------------------------------------------------------------
+ // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
+ // Modified: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
+ //-----------------------------------------------------------------
+
- }
- else{
+ Float_t zerosup = fTPCParam->GetZeroSup();
+ Int_t nrows =fTPCParam->GetNRow(isec);
+ fCurrentIndex[1]= isec;
+
- // cross-talk from both inner and outer rows
+ Int_t n_of_pads = fTPCParam->GetNPads(isec,irow);
+ Int_t n_of_tbins = fTPCParam->GetMaxTBin();
+ Int_t IndexRange[4];
+ //
+ // Integrated signal for this row
+ // and a single track signal
+ //
+ TMatrix *m1 = new TMatrix(0,n_of_pads,0,n_of_tbins); // integrated
+ TMatrix *m2 = new TMatrix(0,n_of_pads,0,n_of_tbins); // single
+ //
+ TMatrix &Total = *m1;
- GetCrossTalk(3,rowTriplet[0],nTracks[0],n_of_pads,m3); // inner
- GetCrossTalk(4,rowTriplet[2],nTracks[2],n_of_pads,m3); //outer
- }
+ // Array of pointers to the label-signal list
- Total += Cross; // add the cross-talk
+ Int_t NofDigits = n_of_pads*n_of_tbins; // number of digits for this row
+ Float_t **pList = new Float_t* [NofDigits];
+ Int_t lp;
+ Int_t i1;
+ for(lp=0;lp<NofDigits;lp++)pList[lp]=0; // set all pointers to NULL
//
- // Convert analog signal to ADC counts
- //
-
+ //calculate signal
+ //
+ Int_t row1 = TMath::Max(irow-fTPCParam->GetNCrossRows(),0);
+ Int_t row2 = TMath::Min(irow+fTPCParam->GetNCrossRows(),nrows-1);
+ for (Int_t row= row1;row<=row2;row++){
+ Int_t nTracks= rows[row]->GetEntries();
+ for (i1=0;i1<nTracks;i1++){
+ fCurrentIndex[2]= row;
+ fCurrentIndex[3]=irow;
+ if (row==irow){
+ m2->Zero(); // clear single track signal matrix
+ Float_t TrackLabel = GetSignal(rows[row],i1,m2,m1,IndexRange);
+ GetList(TrackLabel,n_of_pads,m2,IndexRange,pList);
+ }
+ else GetSignal(rows[row],i1,0,m1,IndexRange);
+ }
+ }
+
Int_t tracks[3];
- Int_t digits[5];
-
- for(Int_t ip=1;ip<n_of_pads[iFlag]+1;ip++){
- for(Int_t it=1;it<MAXTPCTBK+1;it++){
+ AliDigits *dig = fDigitsArray->GetRow(isec,irow);
+ for(Int_t ip=0;ip<n_of_pads;ip++){
+ for(Int_t it=0;it<n_of_tbins;it++){
Float_t q = Total(ip,it);
- Int_t gi =(it-1)*n_of_pads[iFlag]+ip-1; // global index
+ Int_t gi =it*n_of_pads+ip; // global index
- q = gRandom->Gaus(q,fTPCParam->GetNoise()); // apply noise
- q *= (q_el*1.e15); // convert to fC
- q *= chipgain; // convert to mV
- q *= (adc_sat/dyn_range); // convert to ADC counts
+ q = gRandom->Gaus(q,fTPCParam->GetNoise()*fTPCParam->GetNoiseNormFac());
- if(q <zerosup) continue; // do not fill zeros
+ q = (Int_t)q;
+
+ if(q <=zerosup) continue; // do not fill zeros
if(q > adc_sat) q = adc_sat; // saturation
//
tracks[j1] = (pList[gi]) ?(Int_t)(*(pList[gi]+j1)) : -1;
}
- digits[0]=isec;
- digits[1]=irow+1;
- digits[2]=ip;
- digits[3]=it;
- digits[4]= (Int_t)q;
-
- // Add this digit
-
- AddDigit(tracks,digits);
+//Begin_Html
+/*
+ <A NAME="AliDigits"></A>
+ using of AliDigits object
+*/
+//End_Html
+ dig->SetDigitFast((Short_t)q,it,ip);
+ if (fDigitsArray->IsSimulated())
+ {
+ ((AliSimDigits*)dig)->SetTrackIDFast(tracks[0],it,ip,0);
+ ((AliSimDigits*)dig)->SetTrackIDFast(tracks[1],it,ip,1);
+ ((AliSimDigits*)dig)->SetTrackIDFast(tracks[2],it,ip,2);
+ }
+
} // end of loop over time buckets
} // end of lop over pads
delete m1;
delete m2;
- delete m3;
+ // delete m3;
} // end of DigitizeRow
+
//_____________________________________________________________________________
-Float_t AliTPC::GetSignal(TObjArray *p1, Int_t ntr, Int_t np, TMatrix *m1, TMatrix *m2,
+
+Float_t AliTPC::GetSignal(TObjArray *p1, Int_t ntr, TMatrix *m1, TMatrix *m2,
Int_t *IndexRange)
{
//-----------------------------------------------------------------
// Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
+ // Modified: Marian Ivanov
//-----------------------------------------------------------------
TVector *tv;
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- AliTPCPRF2D * fPRF2D = &(fDigParam->GetPRF2D());
- AliTPCRF1D * fRF = &(fDigParam->GetRF());
- //to make the code faster we put parameters to the stack
-
- Float_t zwidth = fTPCParam->GetZWidth();
- Float_t zwidthm1 =1./zwidth;
-
tv = (TVector*)p1->At(ntr); // pointer to a track
TVector &v = *tv;
Float_t label = v(0);
+ Int_t CentralPad = (fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3])-1)/2;
- Int_t CentralPad = (np+1)/2;
- Int_t PadNumber;
Int_t nElectrons = (tv->GetNrows()-1)/4;
- Float_t range=((np-1)/2 + 0.5)*fTPCParam->GetPadPitchWidth(); // pad range
- range -= 0.5; // dead zone, 5mm from the edge, according to H.G. Fischer
-
- Float_t IneffFactor = 0.5; // inefficiency in the gain close to the edge, as above
-
-
- Float_t PadSignal[7]; // signal from a single electron
-
- TMatrix &signal = *m1;
- TMatrix &total = *m2;
-
-
IndexRange[0]=9999; // min pad
IndexRange[1]=-1; // max pad
IndexRange[2]=9999; //min time
IndexRange[3]=-1; // max time
+ // Float_t IneffFactor = 0.5; // inefficiency in the gain close to the edge, as above
+
+ TMatrix &signal = *m1;
+ TMatrix &total = *m2;
//
// Loop over all electrons
//
-
for(Int_t nel=0; nel<nElectrons; nel++){
- Int_t idx=nel*4;
- Float_t xwire = v(idx+1);
- Float_t y = v(idx+2);
- Float_t z = v(idx+3);
-
-
- Float_t absy=TMath::Abs(y);
-
- if(absy < 0.5*fTPCParam->GetPadPitchWidth()){
- PadNumber=CentralPad;
- }
- else if (absy < range){
- PadNumber=(Int_t) ((absy-0.5*fTPCParam->GetPadPitchWidth())/fTPCParam->GetPadPitchWidth() +1.);
- PadNumber=(Int_t) (TMath::Sign((Float_t)PadNumber, y)+CentralPad);
- }
- else continue; // electron out of pad-range , lost at the sector edge
+ Int_t idx=nel*4;
+ Float_t aval = v(idx+4);
+ Float_t eltoadcfac=aval*fTPCParam->GetTotalNormFac();
+ Float_t xyz[3]={v(idx+1),v(idx+2),v(idx+3)};
+ Int_t n = fTPCParam->CalcResponse(xyz,fCurrentIndex,fCurrentIndex[3]);
- Float_t aval = (absy<range-0.5) ? v(idx+4):v(idx+4)*IneffFactor;
-
-
- Float_t dist = y - (Float_t)(PadNumber-CentralPad)*fTPCParam->GetPadPitchWidth();
- for (Int_t i=0;i<7;i++){
- PadSignal[i]=fPRF2D->GetPRF(dist+(i-3)*fTPCParam->GetPadPitchWidth(),xwire)*aval;
- PadSignal[i] *= fTPCParam->GetPadCoupling();
- }
-
- Int_t LeftPad = TMath::Max(1,PadNumber-3);
- Int_t RightPad = TMath::Min(np,PadNumber+3);
-
- Int_t pmin=LeftPad-PadNumber+3; // lower index of the pad_signal vector
- Int_t pmax=RightPad-PadNumber+3; // upper index
-
- Float_t z_drift = (z_end-z)*zwidthm1;
- Float_t z_offset = z_drift-(Int_t)z_drift;
- //distance to the centre of nearest time bin (in time bin units)
- Int_t FirstBucket = (Int_t)z_drift+1;
-
-
- // loop over time bins (4 bins is enough - 3 sigma truncated Gaussian)
- for (Int_t i2=0;i2<4;i2++){
- Int_t TrueTime = FirstBucket+i2; // current time bucket
- Float_t dz = (Float_t(i2)+z_offset)*zwidth;
- Float_t ampl = fRF->GetRF(dz);
- if( (TrueTime>MAXTPCTBK) ) break; // beyond the time range
-
- IndexRange[2]=TMath::Min(IndexRange[2],TrueTime); // min time
- IndexRange[3]=TMath::Max(IndexRange[3],TrueTime); // max time
-
- // loop over pads, from pmin to pmax
- for(Int_t i3=pmin;i3<=pmax;i3++){
- Int_t TruePad = LeftPad+i3-pmin;
- IndexRange[0]=TMath::Min(IndexRange[0],TruePad); // min pad
- IndexRange[1]=TMath::Max(IndexRange[1],TruePad); // max pad
- signal(TruePad,TrueTime)+=(PadSignal[i3]*ampl); // not converted to charge!!!
- total(TruePad,TrueTime)+=(PadSignal[i3]*ampl); // not converted to charge!!!
- } // end of pads loop
- } // end of time loop
+ if (n>0) for (Int_t i =0; i<n; i++){
+ Int_t *index = fTPCParam->GetResBin(i);
+ Int_t pad=index[1]+CentralPad; //in digit coordinates central pad has coordinate 0
+ if ( ( pad<(fTPCParam->GetNPads(fCurrentIndex[1],fCurrentIndex[3]))) && (pad>0)) {
+ Int_t time=index[2];
+ Float_t weight = fTPCParam->GetResWeight(i); //we normalise response to ADC channel
+ weight *= eltoadcfac;
+
+ if (m1!=0) signal(pad,time)+=weight;
+ total(pad,time)+=weight;
+ IndexRange[0]=TMath::Min(IndexRange[0],pad);
+ IndexRange[1]=TMath::Max(IndexRange[1],pad);
+ IndexRange[2]=TMath::Min(IndexRange[2],time);
+ IndexRange[3]=TMath::Max(IndexRange[3],time);
+ }
+ }
} // end of loop over electrons
-
+
return label; // returns track label when finished
}
for(Int_t ip=IndexRange[0];ip<IndexRange[1]+1;ip++){
- Int_t GlobalIndex = (it-1)*np+ip-1; // GlobalIndex starts from 0!
+ // accept only the contribution larger than 500 electrons (1/2 s_noise)
+
+ if(signal(ip,it)<0.5) continue;
+
+
+ Int_t GlobalIndex = it*np+ip; // GlobalIndex starts from 0!
if(!pList[GlobalIndex]){
//
// Create new list (6 elements - 3 signals and 3 labels),
- // but only if the signal is > 0.
//
- if(signal(ip,it)>0.){
-
pList[GlobalIndex] = new Float_t [6];
// set list to -1
*pList[GlobalIndex] = label;
- *(pList[GlobalIndex]+3) = signal(ip,it);}
+ *(pList[GlobalIndex]+3) = signal(ip,it);
}
else{
-
}//end of GetList
//___________________________________________________________________
void AliTPC::MakeSector(Int_t isec,Int_t nrows,TTree *TH,
// Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
//-----------------------------------------------------------------
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
+ Float_t gasgain = fTPCParam->GetGasGain();
Int_t i;
- Float_t xyz[3];
+ Float_t xyz[4];
AliTPChit *tpcHit; // pointer to a sigle TPC hit
row[i] = new TObjArray;
}
Int_t *n_of_electrons = new Int_t [nrows]; // electron counter for each row
- TVector **tr = new TVector* [nrows]; //pointers to the track vectors
+ TVector **tracks = new TVector* [nrows]; //pointers to the track vectors
//--------------------------------------------------------------------
// Loop over tracks, the "track" contains the full history
tpcHit = (AliTPChit*)fHits->UncheckedAt(hit); // get a pointer to a hit
Int_t sector=tpcHit->fSector; // sector number
- if(sector != isec) continue; //terminate iteration
+ if(sector != isec) continue;
currentTrack = tpcHit->fTrack; // track number
if(currentTrack != previousTrack){
for(i=0;i<nrows;i++){
if(previousTrack != -1){
if(n_of_electrons[i]>0){
- TVector &v = *tr[i];
+ TVector &v = *tracks[i];
v(0) = previousTrack;
- tr[i]->ResizeTo(3*n_of_electrons[i]+1); // shrink if necessary
- row[i]->Add(tr[i]);
+ tracks[i]->ResizeTo(4*n_of_electrons[i]+1); // shrink if necessary
+ row[i]->Add(tracks[i]);
}
else{
- delete tr[i]; // delete empty TVector
- tr[i]=0;
+ delete tracks[i]; // delete empty TVector
+ tracks[i]=0;
}
}
n_of_electrons[i]=0;
- tr[i] = new TVector(361); // TVectors for the next fTrack
+ tracks[i] = new TVector(481); // TVectors for the next fTrack
} // end of loop over rows
// Calculate the electron attachment probability
//---------------------------------------------------
- Float_t time = 1.e6*(z_end-TMath::Abs(tpcHit->fZ))/fTPCParam->GetDriftV();
+
+ Float_t time = 1.e6*(fTPCParam->GetZLength()-TMath::Abs(tpcHit->fZ))
+ /fTPCParam->GetDriftV();
// in microseconds!
Float_t AttProb = fTPCParam->GetAttCoef()*
fTPCParam->GetOxyCont()*time; // fraction!
//-----------------------------------------------
// Loop over electrons
//-----------------------------------------------
-
+ Int_t index[3];
+ index[1]=isec;
for(Int_t nel=0;nel<QI;nel++){
// skip if electron lost due to the attachment
if((gRandom->Rndm(0)) < AttProb) continue; // electron lost!
xyz[0]=tpcHit->fX;
xyz[1]=tpcHit->fY;
- xyz[2]=tpcHit->fZ;
- ElDiff(xyz); // Appply the diffusion
+ xyz[2]=tpcHit->fZ;
+ xyz[3]= (Float_t) (-gasgain*TMath::Log(gRandom->Rndm()));
+ index[0]=1;
+
+ TransportElectron(xyz,index); //MI change -august
Int_t row_number;
- fTPCParam->XYZtoCRXYZ(xyz,isec,row_number,3);
-
- //transform position to local coordinates
- //option 3 means that we calculate x position relative to
- //nearest pad row
-
- if ((row_number<0)||row_number>=fTPCParam->GetNRow(isec)) continue;
- ExB(xyz); // ExB effect at the sense wires
+ fTPCParam->GetPadRow(xyz,index); //MI change august
+ row_number = index[2];
+ //transform position to local digit coordinates
+ //relative to nearest pad row
+ if ((row_number<0)||row_number>=fTPCParam->GetNRow(isec)) continue;
n_of_electrons[row_number]++;
//----------------------------------
// Expand vector if necessary
//----------------------------------
if(n_of_electrons[row_number]>120){
- Int_t range = tr[row_number]->GetNrows();
- if(n_of_electrons[row_number] > (range-1)/3){
- tr[row_number]->ResizeTo(range+150); // Add 50 electrons
+ Int_t range = tracks[row_number]->GetNrows();
+ if((n_of_electrons[row_number])>(range-1)/4){
+
+ tracks[row_number]->ResizeTo(range+400); // Add 100 electrons
}
}
- TVector &v = *tr[row_number];
- Int_t idx = 3*n_of_electrons[row_number]-2;
+ TVector &v = *tracks[row_number];
+ Int_t idx = 4*n_of_electrons[row_number]-3;
- v(idx)= xyz[0]; // X
- v(idx+1)=xyz[1]; // Y (along the pad-row)
- v(idx+2)=xyz[2]; // Z
-
+ v(idx)= xyz[0]; // X - pad row coordinate
+ v(idx+1)=xyz[1]; // Y - pad coordinate (along the pad-row)
+ v(idx+2)=xyz[2]; // Z - time bin coordinate
+ v(idx+3)=xyz[3]; // avalanche size
} // end of loop over electrons
} // end of loop over hits
for(i=0;i<nrows;i++){
if(n_of_electrons[i]>0){
- TVector &v = *tr[i];
+ TVector &v = *tracks[i];
v(0) = previousTrack;
- tr[i]->ResizeTo(3*n_of_electrons[i]+1); // shrink if necessary
- row[i]->Add(tr[i]);
+ tracks[i]->ResizeTo(4*n_of_electrons[i]+1); // shrink if necessary
+ row[i]->Add(tracks[i]);
}
else{
- delete tr[i];
- tr[i]=0;
+ delete tracks[i];
+ tracks[i]=0;
}
}
- delete [] tr;
- delete [] n_of_electrons;
-
-} // end of MakeSector
-//_____________________________________________________________________________
-void AliTPC::GetCrossTalk (Int_t iFlag,TObjArray *p,Int_t ntracks,Int_t *npads,
- TMatrix *m)
-{
-
- //-------------------------------------------------------------
- // Calculates the cross-talk from one row (inner or outer)
- //-------------------------------------------------------------
-
- //-----------------------------------------------------------------
- // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
- //-----------------------------------------------------------------
-
- //
- // iFlag=2 & 3 --> cross-talk from the inner row
- // iFlag=0 & 4 --> cross-talk from the outer row
- //
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- AliTPCPRF2D * fPRF2D = &(fDigParam->GetPRF2D());
- AliTPCRF1D * fRF = &(fDigParam->GetRF());
+ delete [] tracks;
+ delete [] n_of_electrons;
- //to make code faster
-
- Float_t zwidth = fTPCParam->GetZWidth();
- Float_t zwidthm1 =1/fTPCParam->GetZWidth();
-
- Int_t PadNumber;
- Float_t xwire;
-
- Int_t nPadsSignal; // for this pads the signal is calculated
- Float_t range; // sense wire range
- Int_t nPadsDiff;
-
- Float_t IneffFactor=0.5; // gain inefficiency close to the edges
-
- if(iFlag == 0){
- // 1-->0
- nPadsSignal = npads[1];
- range = ((npads[1]-1)/2 + 0.5)*fTPCParam->GetPadPitchWidth();
- nPadsDiff = (npads[1]-npads[0])/2;
- }
- else if (iFlag == 2){
- // 1-->2
- nPadsSignal = npads[2];
- range = ((npads[1]-1)/2 + 0.5)*fTPCParam->GetPadPitchWidth();
- nPadsDiff = 0;
- }
- else if (iFlag == 3){
- // 0-->1
- nPadsSignal = npads[1];
- range = ((npads[0]-1)/2 + 0.5)*fTPCParam->GetPadPitchWidth();
- nPadsDiff = 0;
- }
- else{
- // 2-->1
- nPadsSignal = npads[2];
- range = ((npads[2]-1)/2 + 0.5)*fTPCParam->GetPadPitchWidth();
- nPadsDiff = (npads[2]-npads[1])/2;
- }
-
- range-=0.5; // dead zone close to the edges
-
- TVector *tv;
- TMatrix &signal = *m;
-
- Int_t CentralPad = (nPadsSignal+1)/2;
- Float_t PadSignal[7]; // signal from a single electron
- // Loop over tracks
- for(Int_t nt=0;nt<ntracks;nt++){
- tv=(TVector*)p->At(nt); // pointer to a track
- TVector &v = *tv;
- Int_t nElectrons = (tv->GetNrows()-1)/4;
- // Loop over electrons
- for(Int_t nel=0; nel<nElectrons; nel++){
- Int_t idx=nel*4;
- xwire=v(idx+1);
-
- if (iFlag==0) xwire+=fTPCParam->GetPadPitchLength();
- if (iFlag==2) xwire-=fTPCParam->GetPadPitchLength();
- if (iFlag==3) xwire-=fTPCParam->GetPadPitchLength();
- if (iFlag==4) xwire+=fTPCParam->GetPadPitchLength();
-
- // electron acceptance for the cross-talk (only the closest wire)
-
- Float_t dxMax = fTPCParam->GetPadPitchLength()*0.5+fTPCParam->GetWWPitch();
- if(TMath::Abs(xwire)>dxMax) continue;
-
- Float_t y = v(idx+2);
- Float_t z = v(idx+3);
- Float_t absy=TMath::Abs(y);
-
- if(absy < 0.5*fTPCParam->GetPadPitchWidth()){
- PadNumber=CentralPad;
- }
- else if (absy < range){
- PadNumber=(Int_t) ((absy-0.5*fTPCParam->GetPadPitchWidth())/fTPCParam->GetPadPitchWidth() +1.);
- PadNumber=(Int_t) (TMath::Sign((Float_t)PadNumber, y)+CentralPad);
- }
- else continue; // electron out of sense wire range, lost at the sector edge
-
- Float_t aval = (absy<range-0.5) ? v(idx+4):v(idx+4)*IneffFactor;
-
- Float_t dist = y - (Float_t)(PadNumber-CentralPad)*fTPCParam->GetPadPitchWidth();
-
- for (Int_t i=0;i<7;i++){
- PadSignal[i]=fPRF2D->GetPRF(dist+(3-i)*fTPCParam->GetPadPitchWidth(),xwire)*aval;
-
- PadSignal[i] *= fTPCParam->GetPadCoupling();
- }
- // real pad range
-
- Int_t LeftPad = TMath::Max(1,PadNumber-3);
- Int_t RightPad = TMath::Min(nPadsSignal,PadNumber+3);
-
- Int_t pmin=LeftPad-PadNumber+3; // lower index of the pad_signal vector
- Int_t pmax=RightPad-PadNumber+3; // upper index
-
-
- Float_t z_drift = (z_end-z)*zwidthm1;
- Float_t z_offset = z_drift-(Int_t)z_drift;
- //distance to the centre of nearest time bin (in time bin units)
- Int_t FirstBucket = (Int_t)z_drift+1;
- // MI check it --time offset
- for (Int_t i2=0;i2<4;i2++){
- Int_t TrueTime = FirstBucket+i2; // current time bucket
- Float_t dz = (Float_t(i2)+z_offset)*zwidth;
- Float_t ampl = fRF->GetRF(dz);
- if((TrueTime>MAXTPCTBK)) break; // beyond the time range
-
-
- // loop over pads, from pmin to pmax
-
- for(Int_t i3=pmin;i3<pmax+1;i3++){
- Int_t TruePad = LeftPad+i3-pmin;
-
- if(TruePad<nPadsDiff+1 || TruePad > nPadsSignal-nPadsDiff) continue;
-
- TruePad -= nPadsDiff;
- signal(TruePad,TrueTime)+=(PadSignal[i3]*ampl); // not converted to charge!
-
- } // end of loop over pads
- } // end of loop over time bins
-
- } // end of loop over electrons
-
- } // end of loop over tracks
-
-} // end of GetCrossTalk
+} // end of MakeSector
//_____________________________________________________________________________
// reset clusters
//
fNdigits = 0;
- // if (fDigits) fDigits->Clear();
- if (fDigParam->GetArray()!=0) fDigParam->GetArray()->Clear();
+ if (fDigits) fDigits->Clear();
fNclusters = 0;
if (fClusters) fClusters->Clear();
}
fSens = sens;
}
+
+void AliTPC::SetSide(Float_t side)
+{
+ fSide = side;
+
+}
+//____________________________________________________________________________
+void AliTPC::SetGasMixt(Int_t nc,Int_t c1,Int_t c2,Int_t c3,Float_t p1,
+ Float_t p2,Float_t p3)
+{
+
+ fNoComp = nc;
+
+ fMixtComp[0]=c1;
+ fMixtComp[1]=c2;
+ fMixtComp[2]=c3;
+
+ fMixtProp[0]=p1;
+ fMixtProp[1]=p2;
+ fMixtProp[2]=p3;
+
+
+}
+//_____________________________________________________________________________
+
+void AliTPC::TransportElectron(Float_t *xyz, Int_t *index)
+{
+ //
+ // electron transport taking into account:
+ // 1. diffusion,
+ // 2.ExB at the wires
+ // 3. nonisochronity
+ //
+ // xyz and index must be already transformed to system 1
+ //
+
+ fTPCParam->Transform1to2(xyz,index);
+
+ //add diffusion
+ Float_t driftl=xyz[2];
+ if(driftl<0.01) driftl=0.01;
+ driftl=TMath::Sqrt(driftl);
+ Float_t sig_t = driftl*(fTPCParam->GetDiffT());
+ Float_t sig_l = driftl*(fTPCParam->GetDiffL());
+ xyz[0]=gRandom->Gaus(xyz[0],sig_t);
+ xyz[1]=gRandom->Gaus(xyz[1],sig_t);
+ xyz[2]=gRandom->Gaus(xyz[2],sig_l);
+ // ExB
+
+ if (fTPCParam->GetMWPCReadout()==kTRUE){
+ Float_t x1=xyz[0];
+ fTPCParam->Transform2to2NearestWire(xyz,index);
+ Float_t dx=xyz[0]-x1;
+ xyz[1]+=dx*(fTPCParam->GetOmegaTau());
+ }
+ //add nonisochronity (not implemented yet)
+
+}
//_____________________________________________________________________________
void AliTPC::Streamer(TBuffer &R__b)
{
R__b >> fNsectors;
R__b >> fNclusters;
R__b >> fNtracks;
- fClustersIndex = new Int_t[fNsectors+1];
- fDigitsIndex = new Int_t[fNsectors+1];
+
} else {
R__b.WriteVersion(AliTPC::IsA());
AliDetector::Streamer(R__b);
//
// Transformation from local to global coordinate system
//
- x[0]=par->GetPadRowRadii(fSector,fPadRow-1);
+ x[0]=par->GetPadRowRadii(fSector,fPadRow);
x[1]=fY;
x[2]=fZ;
- par->CRXYZtoXYZ(x,fSector,fPadRow-1,1);
+ Float_t cs, sn, tmp;
+ par->AdjustCosSin(fSector,cs,sn);
+ tmp = x[0]*cs-x[1]*sn;
+ x[1]= x[0]*sn+x[1]*cs; x[0]=tmp;
}
//_____________________________________________________________________________
{
//
// compare two clusters according y coordinata
+ //
AliTPCcluster *cl= (AliTPCcluster *)o;
if (fY<cl->fY) return -1;
if (fY==cl->fY) return 0;
{
//
//make AliTPCcluster sortabale
+ //
return kTRUE;
}
//
// Default creator for a TPC reconstructed track object
//
- ref=hits[0]; // This is dummy code !
+ fX=hits[0]; // This is dummy code !
}
+//_________________________________________________________________________
-AliTPCtrack::AliTPCtrack(const AliTPCcluster& c,const TVector& xx,
- const TMatrix& CC, const AliTPCParam *p):
- x(xx),C(CC),clusters(MAX_CLUSTER)
+AliTPCtrack::AliTPCtrack(const AliTPCcluster *c,const TVector& xx,
+ const TMatrix& CC, Double_t xref, Double_t alpha):
+ x(xx),C(CC),fClusters(200)
{
+ //-----------------------------------------------------------------
+ // This is the main track constructor.
//
- // Standard creator for a TPC reconstructed track object
- //
- chi2=0.;
- int sec=c.fSector-1, row=c.fPadRow-1;
- ref=p->GetPadRowRadii(sec+1,row);
-
- if (sec<24) {
- fAlpha=(sec%12)*alpha_low;
- } else {
- fAlpha=(sec%24)*alpha_up;
- }
- clusters.AddLast((AliTPCcluster*)(&c));
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ fX=xref;
+ fAlpha=alpha;
+ fChi2=0.;
+ fClusters.AddLast((AliTPCcluster*)(c));
}
//_____________________________________________________________________________
AliTPCtrack::AliTPCtrack(const AliTPCtrack& t) : x(t.x), C(t.C),
- clusters(t.clusters.GetEntriesFast())
+ fClusters(t.fClusters.GetEntriesFast())
{
+ //-----------------------------------------------------------------
+ // This is a track copy constructor.
//
- // Copy creator for a TPC reconstructed track
- //
- ref=t.ref;
- chi2=t.chi2;
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ fX=t.fX;
+ fChi2=t.fChi2;
fAlpha=t.fAlpha;
- int n=t.clusters.GetEntriesFast();
- for (int i=0; i<n; i++) clusters.AddLast(t.clusters.UncheckedAt(i));
+ Int_t n=t.fClusters.GetEntriesFast();
+ for (Int_t i=0; i<n; i++) fClusters.AddLast(t.fClusters.UncheckedAt(i));
}
//_____________________________________________________________________________
-Double_t AliTPCtrack::GetY(Double_t xk) const
-{
- //
- //
- //
- Double_t c2=x(2)*xk - x(3);
- if (TMath::Abs(c2) >= 0.999) {
- if (*this>10) cerr<<*this<<" AliTPCtrack warning: No y for this x !\n";
- return 0.;
- }
- Double_t c1=x(2)*ref - x(3);
- Double_t r1=sqrt(1.-c1*c1), r2=sqrt(1.-c2*c2);
- Double_t dx=xk-ref;
- return x(0) + dx*(c1+c2)/(r1+r2);
+Int_t AliTPCtrack::Compare(TObject *o) {
+ //-----------------------------------------------------------------
+ // This function compares tracks according to the uncertainty of their
+ // position in Y.
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ AliTPCtrack *t=(AliTPCtrack*)o;
+ Double_t co=t->GetSigmaY2();
+ Double_t c =GetSigmaY2();
+ if (c>co) return 1;
+ else if (c<co) return -1;
+ return 0;
}
//_____________________________________________________________________________
-int AliTPCtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho,Double_t pm)
+Int_t AliTPCtrack::PropagateTo(Double_t xk,Double_t x0,Double_t rho,Double_t pm)
{
+ //-----------------------------------------------------------------
+ // This function propagates a track to a reference plane x=xk.
//
- // Propagate a TPC reconstructed track
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
if (TMath::Abs(x(2)*xk - x(3)) >= 0.999) {
- if (*this>3) cerr<<*this<<" AliTPCtrack warning: Propagation failed !\n";
+ if (*this>4) cerr<<*this<<" AliTPCtrack warning: Propagation failed !\n";
return 0;
}
- Double_t x1=ref, x2=x1+0.5*(xk-x1), dx=x2-x1, y1=x(0), z1=x(1);
+ Double_t x1=fX, x2=x1+(xk-x1), dx=x2-x1, y1=x(0), z1=x(1);
Double_t c1=x(2)*x1 - x(3), r1=sqrt(1.- c1*c1);
Double_t c2=x(2)*x2 - x(3), r2=sqrt(1.- c2*c2);
F(1,4)= dx*cc/cr;
TMatrix tmp(F,TMatrix::kMult,C);
C.Mult(tmp,TMatrix(TMatrix::kTransposed,F));
-
- ref=x2;
-
+
+ fX=x2;
+
//Multiple scattering******************
- Double_t ey=x(2)*ref - x(3);
+ Double_t ey=x(2)*fX - x(3);
Double_t ex=sqrt(1-ey*ey);
Double_t ez=x(4);
TMatrix Q(5,5); Q=0.;
F=0;
F(2,2)=-x(2)*ex; F(2,3)=-x(2)*ey;
- F(3,2)=-ex*(x(2)*ref-ey); F(3,3)=-(1.+ x(2)*ref*ey - ey*ey);
+ F(3,2)=-ex*(x(2)*fX-ey); F(3,3)=-(1.+ x(2)*fX*ey - ey*ey);
F(4,2)=-ez*ex; F(4,3)=-ez*ey; F(4,4)=1.;
tmp.Mult(F,Q);
Double_t p2=GetPt()*GetPt()*(1.+x(4)*x(4));
Double_t beta2=p2/(p2 + pm*pm);
- Double_t d=sqrt((x1-ref)*(x1-ref)+(y1-x(0))*(y1-x(0))+(z1-x(1))*(z1-x(1)));
- d*=2.;
+ Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-x(0))*(y1-x(0))+(z1-x(1))*(z1-x(1)));
Double_t theta2=14.1*14.1/(beta2*p2*1e6)*d/x0*rho;
Q*=theta2;
C+=Q;
-
+
//Energy losses************************
Double_t dE=0.153e-3/beta2*(log(5940*beta2/(1-beta2)) - beta2)*d*rho;
if (x1 < x2) dE=-dE;
x(2)*=(1.- sqrt(p2+pm*pm)/p2*dE);
//x(3)*=(1.- sqrt(p2+pm*pm)/p2*dE);
-
- x1=ref; x2=xk; y1=x(0); z1=x(1);
- c1=x(2)*x1 - x(3); r1=sqrt(1.- c1*c1);
- c2=x(2)*x2 - x(3); r2=sqrt(1.- c2*c2);
-
- x(0) += dx*(c1+c2)/(r1+r2);
- x(1) += dx*(c1+c2)/(c1*r2 + c2*r1)*x(4);
-
- F.UnitMatrix();
- rr=r1+r2; cc=c1+c2; xx=x1+x2;
- F(0,2)= dx*(rr*xx + cc*(c1*x1/r1+c2*x2/r2))/(rr*rr);
- F(0,3)=-dx*(2*rr + cc*(c1/r1 + c2/r2))/(rr*rr);
- cr=c1*r2+c2*r1;
- F(1,2)= dx*x(4)*(cr*xx-cc*(r1*x2-c2*c1*x1/r1+r2*x1-c1*c2*x2/r2))/(cr*cr);
- F(1,3)=-dx*x(4)*(2*cr + cc*(c2*c1/r1-r1 + c1*c2/r2-r2))/(cr*cr);
- F(1,4)= dx*cc/cr;
- tmp.Mult(F,C);
- C.Mult(tmp,TMatrix(TMatrix::kTransposed,F));
-
- ref=x2;
-
+
return 1;
}
//_____________________________________________________________________________
void AliTPCtrack::PropagateToVertex(Double_t x0,Double_t rho,Double_t pm)
{
+ //-----------------------------------------------------------------
+ // This function propagates tracks to the "vertex".
//
- // Propagate a reconstructed track from the vertex
- //
- Double_t c=x(2)*ref - x(3);
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ Double_t c=x(2)*fX - x(3);
Double_t tgf=-x(3)/(x(2)*x(0) + sqrt(1-c*c));
Double_t snf=tgf/sqrt(1.+ tgf*tgf);
Double_t xv=(x(3)+snf)/x(2);
//_____________________________________________________________________________
void AliTPCtrack::Update(const AliTPCcluster *c, Double_t chisq)
{
+ //-----------------------------------------------------------------
+ // This function associates a clusters with this track.
//
- // Update statistics for a reconstructed TPC track
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
TMatrix H(2,5); H.UnitMatrix();
TMatrix Ht(TMatrix::kTransposed,H);
TVector m(2); m(0)=c->fY; m(1)=c->fZ;
TMatrix K(C,TMatrix::kMult,Ht); K*=R;
TVector savex=x;
- x*=H; x-=m; x*=-1; x*=K; x+=savex;
- if (TMath::Abs(x(2)*ref-x(3)) >= 0.999) {
- if (*this>3) cerr<<*this<<" AliTPCtrack warning: Filtering failed !\n";
+ x*=H; x-=m;
+
+ x*=-1; x*=K; x+=savex;
+ if (TMath::Abs(x(2)*fX-x(3)) >= 0.999) {
+ if (*this>4) cerr<<*this<<" AliTPCtrack warning: Filtering failed !\n";
x=savex;
return;
}
TMatrix saveC=C;
C.Mult(K,tmp); C-=saveC; C*=-1;
-
- clusters.AddLast((AliTPCcluster*)c);
- chi2 += chisq;
+
+ fClusters.AddLast((AliTPCcluster*)c);
+ fChi2 += chisq;
}
//_____________________________________________________________________________
-int AliTPCtrack::Rotate(Double_t alpha)
+Int_t AliTPCtrack::Rotate(Double_t alpha)
{
+ //-----------------------------------------------------------------
+ // This function rotates this track.
//
- // Rotate a reconstructed TPC track
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
fAlpha += alpha;
- Double_t x1=ref, y1=x(0);
+ Double_t x1=fX, y1=x(0);
Double_t ca=cos(alpha), sa=sin(alpha);
- Double_t r1=x(2)*ref - x(3);
+ Double_t r1=x(2)*fX - x(3);
- ref = x1*ca + y1*sa;
+ fX = x1*ca + y1*sa;
x(0)=-x1*sa + y1*ca;
x(3)=x(3)*ca + (x(2)*y1 + sqrt(1.- r1*r1))*sa;
- Double_t r2=x(2)*ref - x(3);
+ Double_t r2=x(2)*fX - x(3);
if (TMath::Abs(r2) >= 0.999) {
- if (*this>3) cerr<<*this<<" AliTPCtrack warning: Rotation failed !\n";
+ if (*this>4) cerr<<*this<<" AliTPCtrack warning: Rotation failed !\n";
return 0;
}
Double_t y0=x(0) + sqrt(1.- r2*r2)/x(2);
if ((x(0)-y0)*x(2) >= 0.) {
- if (*this>3) cerr<<*this<<" AliTPCtrack warning: Rotation failed !!!\n";
+ if (*this>4) cerr<<*this<<" AliTPCtrack warning: Rotation failed !!!\n";
return 0;
}
//_____________________________________________________________________________
void AliTPCtrack::UseClusters() const
{
+ //-----------------------------------------------------------------
+ // This function marks clusters associated with this track.
//
- //
- //
- int num_of_clusters=clusters.GetEntriesFast();
- for (int i=0; i<num_of_clusters; i++) {
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ Int_t num_of_clusters=fClusters.GetEntriesFast();
+ for (Int_t i=0; i<num_of_clusters; i++) {
//if (i<=14) continue;
- AliTPCcluster *c=(AliTPCcluster*)clusters.UncheckedAt(i);
+ AliTPCcluster *c=(AliTPCcluster*)fClusters.UncheckedAt(i);
c->Use();
}
}
//_____________________________________________________________________________
Double_t AliTPCtrack::GetPredictedChi2(const AliTPCcluster *c) const
{
+ //-----------------------------------------------------------------
+ // This function calculates a predicted chi2 increment.
//
- // Calculate chi2 for a reconstructed TPC track
- //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
TMatrix H(2,5); H.UnitMatrix();
TVector m(2); m(0)=c->fY; m(1)=c->fZ;
TMatrix V(2,2); V(0,0)=c->fSigmaY2; V(0,1)=0.; V(1,0)=0.; V(1,1)=c->fSigmaZ2;
Double_t det=(Double_t)R(0,0)*R(1,1) - (Double_t)R(0,1)*R(1,0);
if (TMath::Abs(det) < 1.e-10) {
- if (*this>3) cerr<<*this<<" AliTPCtrack warning: Singular matrix !\n";
+ if (*this>4) cerr<<*this<<" AliTPCtrack warning: Singular matrix !\n";
return 1e10;
}
R(0,1)=R(0,0); R(0,0)=R(1,1); R(1,1)=R(0,1);
}
//_____________________________________________________________________________
-int AliTPCtrack::GetLab() const
+struct S { Int_t lab; Int_t max; };
+Int_t AliTPCtrack::GetLabel(Int_t nrows) const
{
+ //-----------------------------------------------------------------
+ // This function returns the track label. If label<0, this track is fake.
//
- //
- //
- int lab=123456789;
- struct {
- int lab;
- int max;
- } s[MAX_CLUSTER]={{0,0}};
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ Int_t num_of_clusters=fClusters.GetEntriesFast();
+ S *s=new S[num_of_clusters];
+ Int_t i;
+ for (i=0; i<num_of_clusters; i++) s[i].lab=s[i].max=0;
- int i;
- int num_of_clusters=clusters.GetEntriesFast();
+ Int_t lab=123456789;
for (i=0; i<num_of_clusters; i++) {
- AliTPCcluster *c=(AliTPCcluster*)clusters.UncheckedAt(i);
+ AliTPCcluster *c=(AliTPCcluster*)fClusters.UncheckedAt(i);
lab=TMath::Abs(c->fTracks[0]);
- int j;
- for (j=0; j<MAX_CLUSTER; j++)
+ Int_t j;
+ for (j=0; j<num_of_clusters; j++)
if (s[j].lab==lab || s[j].max==0) break;
s[j].lab=lab;
s[j].max++;
}
- int max=0;
+ Int_t max=0;
for (i=0; i<num_of_clusters; i++)
if (s[i].max>max) {max=s[i].max; lab=s[i].lab;}
-
+
+ delete[] s;
+
for (i=0; i<num_of_clusters; i++) {
- AliTPCcluster *c=(AliTPCcluster*)clusters.UncheckedAt(i);
+ AliTPCcluster *c=(AliTPCcluster*)fClusters.UncheckedAt(i);
if (TMath::Abs(c->fTracks[1]) == lab ||
TMath::Abs(c->fTracks[2]) == lab ) max++;
}
- if (1.-float(max)/num_of_clusters > 0.10) return -lab;
+ if (1.-Float_t(max)/num_of_clusters > 0.10) return -lab;
- if (num_of_clusters < 6) return lab;
+ Int_t tail=Int_t(0.08*nrows);
+ if (num_of_clusters < tail) return lab;
max=0;
- for (i=1; i<=6; i++) {
- AliTPCcluster *c=(AliTPCcluster*)clusters.UncheckedAt(num_of_clusters-i);
+ for (i=1; i<=tail; i++) {
+ AliTPCcluster *c=(AliTPCcluster*)fClusters.UncheckedAt(num_of_clusters-i);
if (lab == TMath::Abs(c->fTracks[0]) ||
lab == TMath::Abs(c->fTracks[1]) ||
lab == TMath::Abs(c->fTracks[2])) max++;
}
- if (max<3) return -lab;
+ if (max < Int_t(0.5*tail)) return -lab;
return lab;
}
//_____________________________________________________________________________
void AliTPCtrack::GetPxPyPz(Double_t& px, Double_t& py, Double_t& pz) const
{
+ //-----------------------------------------------------------------
+ // This function returns reconstructed track momentum in the global system.
//
- // Get reconstructed TPC track momentum
- //
- Double_t pt=0.3*FIELD/TMath::Abs(x(2))/100; // GeV/c
- Double_t r=x(2)*ref-x(3);
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ Double_t pt=TMath::Abs(GetPt()); // GeV/c
+ Double_t r=x(2)*fX-x(3);
Double_t y0=x(0) + sqrt(1.- r*r)/x(2);
px=-pt*(x(0)-y0)*x(2); //cos(phi);
- py=-pt*(x(3)-ref*x(2)); //sin(phi);
+ py=-pt*(x(3)-fX*x(2)); //sin(phi);
pz=pt*x(4);
Double_t tmp=px*TMath::Cos(fAlpha) - py*TMath::Sin(fAlpha);
py=px*TMath::Sin(fAlpha) + py*TMath::Cos(fAlpha);
}
//_____________________________________________________________________________
-//
-// Classes for internal tracking use
-//
-
-//_____________________________________________________________________________
-void AliTPCRow::InsertCluster(const AliTPCcluster* c)
-{
- //
- // Insert a cluster in the list
+Double_t AliTPCtrack::GetdEdX(Double_t low, Double_t up) const {
+ //-----------------------------------------------------------------
+ // This funtion calculates dE/dX within the "low" and "up" cuts.
//
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------
+ Int_t ncl=fClusters.GetEntriesFast();
+ Int_t n=0;
+ Double_t *q=new Double_t[ncl];
+ Int_t i;
+ for (i=1; i<ncl; i++) { //Shall I think of this "i=1" ? (I.Belikov)
+ AliTPCcluster *cl=(AliTPCcluster*)(fClusters.UncheckedAt(i));
+ q[n++]=TMath::Abs(cl->fQ)/cl->fdEdX;
+ if (cl->fSector<36) q[n-1]*=1.1;
+ }
+
+ //stupid sorting
+ Int_t swap;
+ do {
+ swap=0;
+ for (i=0; i<n-1; i++) {
+ if (q[i]<=q[i+1]) continue;
+ Double_t tmp=q[i]; q[i]=q[i+1]; q[i+1]=tmp;
+ swap++;
+ }
+ } while (swap);
+
+ Int_t nl=Int_t(low*n), nu=Int_t(up *n);
+ Double_t dedx=0.;
+ for (i=nl; i<=nu; i++) dedx += q[i];
+ dedx /= (nu-nl+1);
+ return dedx;
+}
+
+//_________________________________________________________________________
+//
+// Classes for internal tracking use
+//_________________________________________________________________________
+void AliTPCRow::InsertCluster(const AliTPCcluster* c) {
+ //-----------------------------------------------------------------------
+ // Insert a cluster into this pad row in accordence with its y-coordinate
+ //
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------------
if (num_of_clusters==MAX_CLUSTER_PER_ROW) {
cerr<<"AliTPCRow::InsertCluster(): Too many clusters !\n"; return;
}
if (num_of_clusters==0) {clusters[num_of_clusters++]=c; return;}
- int i=Find(c->fY);
+ Int_t i=Find(c->fY);
memmove(clusters+i+1 ,clusters+i,(num_of_clusters-i)*sizeof(AliTPCcluster*));
clusters[i]=c; num_of_clusters++;
}
+//___________________________________________________________________
-//_____________________________________________________________________________
-int AliTPCRow::Find(Double_t y) const
-{
- //
- //
+Int_t AliTPCRow::Find(Double_t y) const {
+ //-----------------------------------------------------------------------
+ // Return the index of the nearest cluster
//
+ // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
+ //-----------------------------------------------------------------------
if (y <= clusters[0]->fY) return 0;
if (y > clusters[num_of_clusters-1]->fY) return num_of_clusters;
- int b=0, e=num_of_clusters-1, m=(b+e)/2;
+ Int_t b=0, e=num_of_clusters-1, m=(b+e)/2;
for (; b<e; m=(b+e)/2) {
if (y > clusters[m]->fY) b=m+1;
else e=m;
}
return m;
}
+//________________________________________________________________________
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff