+/**************************************************************************
+ * 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 1.20 2000/06/30 12:07:49 kowal2
+Updated from the TPC-PreRelease branch
+
+Revision 1.19.2.4 2000/06/26 07:39:42 kowal2
+Changes to obey the coding rules
+
+Revision 1.19.2.3 2000/06/25 08:38:41 kowal2
+Splitted from AliTPCtracking
+
+Revision 1.19.2.2 2000/06/16 12:59:28 kowal2
+Changed parameter settings
+
+Revision 1.19.2.1 2000/06/09 07:15:07 kowal2
+
+Defaults loaded automatically (hard-wired)
+Optional parameters can be set via macro called in the constructor
+
+Revision 1.19 2000/04/18 19:00:59 fca
+Small bug fixes to TPC files
+
+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 <TMath.h>
#include <TRandom.h>
#include <TVector.h>
#include <TObjectTable.h>
#include "TParticle.h"
#include "AliTPC.h"
+#include <TFile.h>
#include "AliRun.h"
#include <iostream.h>
#include <fstream.h>
#include "AliMC.h"
-//MI change
-#include "AliTPCParam.h"
-#include "AliTPCD.h"
+
+#include "AliTPCParamSR.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"
+#include "AliTPCcluster.h"
+#include "AliTPCclusterer.h"
+#include "AliTPCtracker.h"
+
+#include <TInterpreter.h>
ClassImp(AliTPC)
// Default constructor
//
fIshunt = 0;
- fClusters = 0;
fHits = 0;
fDigits = 0;
- fTracks = 0;
fNsectors = 0;
- fNtracks = 0;
- fNclusters= 0;
-
- fDigParam= new AliTPCD();
- fDigits = fDigParam->GetArray();
+ //MI changes
+ 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();
-
- AliTPCParam *fTPCParam = &(fDigParam->GetParam());
-
+ gAlice->AddHitList(fHits);
+ //MI change
+ fDigitsArray = 0;
+ fClustersArray= 0;
//
// Initialise counters
- //
- fClusters = 0;
- fTracks = 0;
- fNsectors = fTPCParam->GetNSector();
- fNtracks = 0;
- fNclusters= 0;
- fDigitsIndex = new Int_t[fNsectors+1];
- fClustersIndex = new Int_t[fNsectors+1];
+ fNsectors = 0;
+
//
fIshunt = 0;
//
// Initialise color attributes
SetMarkerColor(kYellow);
+
+ //
+ // Set TPC parameters
+ //
+
+ if (!strcmp(title,"Default")) {
+ fTPCParam = new AliTPCParamSR;
+ } else {
+ cerr<<"AliTPC warning: in Config.C you must set non-default parameters\n";
+ fTPCParam=0;
+ }
+
}
//_____________________________________________________________________________
//
// TPC destructor
//
+
fIshunt = 0;
delete fHits;
delete fDigits;
- delete fClusters;
- delete fTracks;
- delete fDigParam;
- if (fDigitsIndex) delete [] fDigitsIndex;
- if (fClustersIndex) delete [] fClustersIndex;
+ delete fTPCParam;
}
-//_____________________________________________________________________________
-void AliTPC::AddCluster(Float_t *hits, Int_t *tracks)
-{
- //
- // Add a simulated cluster to the list
- //
- if(!fClusters) fClusters=new TClonesArray("AliTPCcluster",10000);
- TClonesArray &lclusters = *fClusters;
- new(lclusters[fNclusters++]) AliTPCcluster(hits,tracks);
-}
-
-//_____________________________________________________________________________
-void AliTPC::AddCluster(const AliTPCcluster &c)
-{
- //
- // Add a simulated cluster copy to the list
- //
- if(!fClusters) fClusters=new TClonesArray("AliTPCcluster",10000);
- 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)
{
new(lhits[fNhits++]) AliTPChit(fIshunt,track,vol,hits);
}
-//_____________________________________________________________________________
-void AliTPC::AddTrack(Float_t *hits)
-{
- //
- // Add a track to the list of tracks
- //
- TClonesArray <racks = *fTracks;
- new(ltracks[fNtracks++]) AliTPCtrack(hits);
-}
-
-//_____________________________________________________________________________
-void AliTPC::AddTrack(const AliTPCtrack& t)
-{
- //
- // Add a track copy to the list of tracks
- //
- if(!fTracks) fTracks=new TClonesArray("AliTPCtrack",10000);
- TClonesArray <racks = *fTracks;
- new(ltracks[fNtracks++]) AliTPCtrack(t);
-}
-
//_____________________________________________________________________________
void AliTPC::BuildGeometry()
{
+
//
// Build TPC ROOT TNode geometry for the event display
//
- TNode *Node, *Top;
+ TNode *nNode, *nTop;
TTUBS *tubs;
Int_t i;
const int kColorTPC=19;
const Double_t kDegrad=TMath::Pi()/180;
const Double_t kRaddeg=180./TMath::Pi();
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- Float_t InnerOpenAngle = fTPCParam->GetInnerAngle();
- Float_t OuterOpenAngle = fTPCParam->GetOuterAngle();
+ Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
+ Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
- Float_t InnerAngleShift = fTPCParam->GetInnerAngleShift();
- Float_t OuterAngleShift = fTPCParam->GetOuterAngleShift();
+ 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 kloAng = (Double_t)TMath::Nint(innerOpenAngle*kRaddeg);
+ const Double_t khiAng = (Double_t)TMath::Nint(outerOpenAngle*kRaddeg);
+ const Double_t kloAngSh = (Double_t)TMath::Nint(innerAngleShift*kRaddeg);
+ const Double_t khiAngSh = (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);
+ const Double_t kloCorr = 1/TMath::Cos(0.5*kloAng*kDegrad);
+ const Double_t khiCorr = 1/TMath::Cos(0.5*khiAng*kDegrad);
Double_t rl,ru;
// Get ALICE top node
//
- Top=gAlice->GetGeometry()->GetNode("alice");
+ nTop=gAlice->GetGeometry()->GetNode("alice");
// inner sectors
- rl = fTPCParam->GetInSecLowEdge();
- ru = fTPCParam->GetInSecUpEdge();
+ rl = fTPCParam->GetInnerRadiusLow();
+ ru = fTPCParam->GetInnerRadiusUp();
for(i=0;i<nLo;i++) {
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 = new TTUBS(name,title,"void",rl*kloCorr,ru*kloCorr,250.,
+ kloAng*(i-0.5)+kloAngSh,kloAng*(i+0.5)+kloAngSh);
tubs->SetNumberOfDivisions(1);
- Top->cd();
- Node = new TNode(name,title,name,0,0,0,"");
- Node->SetLineColor(kColorTPC);
- fNodes->Add(Node);
+ nTop->cd();
+ nNode = new TNode(name,title,name,0,0,0,"");
+ nNode->SetLineColor(kColorTPC);
+ fNodes->Add(nNode);
}
// Outer sectors
- rl = fTPCParam->GetOuSecLowEdge();
- ru = fTPCParam->GetOuSecUpEdge();
+ 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);
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 = new TTUBS(name,title,"void",rl*khiCorr,ru*khiCorr,250,
+ khiAng*(i-0.5)+khiAngSh,khiAng*(i+0.5)+khiAngSh);
tubs->SetNumberOfDivisions(1);
- Top->cd();
- Node = new TNode(name,title,name,0,0,0,"");
- Node->SetLineColor(kColorTPC);
- fNodes->Add(Node);
+ nTop->cd();
+ nNode = new TNode(name,title,name,0,0,0,"");
+ nNode->SetLineColor(kColorTPC);
+ fNodes->Add(nNode);
}
-}
-
-
+
+}
//_____________________________________________________________________________
Int_t AliTPC::DistancetoPrimitive(Int_t , Int_t )
return 9999;
}
-//_____________________________________________________________________________
-static Double_t SigmaY2(Double_t r, Double_t tgl, Double_t pt)
-{
- //
- // 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)
-{
- //
- // 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,
- Double_t x2,Double_t y2,
- Double_t x3,Double_t y3)
-{
- //-----------------------------------------------------------------
- // Initial approximation of the track curvature
- //
- // 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));
- Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
- (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
-
- Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
-
- return -xr*yr/sqrt(xr*xr+yr*yr);
-}
-
-
-//_____________________________________________________________________________
-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
- //
- // 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));
- Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
- (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
-
- Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
-
- return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
-}
-
-//_____________________________________________________________________________
-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
- //
- // 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 rf=0)
-{
- //-----------------------------------------------------------------
- // This function tries to find a track prolongation.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- const int ROWS_TO_SKIP=int(0.5*sec->GetNRows());
- const Float_t MAX_CHI2=12.;
- int try_again=ROWS_TO_SKIP;
- Double_t alpha=sec->GetAlpha();
- int ns=int(2*TMath::Pi()/alpha+0.5);
-
- for (int 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;
-
- 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=5.*sqrt(t.GetSigmaY2() + sy2), y=t.GetY(), z=t.GetZ();
-
- if (road>30) {
- 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++) {
- AliTPCcluster* c=(AliTPCcluster*)(row[i]);
- if (c->fY > y+road) break;
- if (c->IsUsed()) 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;
- cl=c;
- }
- }
- if (cl) {
- t.Update(cl,max_chi2);
- Double_t ll=TMath::Sqrt((1+t.GetTgl()*t.GetTgl())/
- (1-(t.GetC()*x-t.GetEta())*(t.GetC()*x-t.GetEta())));
- cl->fdEdX = cl->fQ/ll;
- try_again=ROWS_TO_SKIP;
- } else {
- if (try_again==0) break;
- if (y > ymax) {
- s = (s+1) % ns;
- if (!t.Rotate(alpha)) return 0;
- } else if (y <-ymax) {
- s = (s-1+ns) % ns;
- if (!t.Rotate(-alpha)) return 0;
- }
- try_again--;
- }
- }
-
- return 1;
-}
-
-
-//_____________________________________________________________________________
-static void MakeSeeds(TObjArray& seeds,const AliTPCSector *sec, int max_sec,
-int i1, int i2)
-{
- //-----------------------------------------------------------------
- // This function creates track seeds.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- TMatrix C(5,5); TVector x(5);
- double alpha=sec->GetAlpha(), shift=sec->GetAlphaShift();
- double cs=cos(alpha), sn=sin(alpha);
- 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];
- const AliTPCRow& r1=sec[ns][i1];
- for (int is=0; is < r1; is++) {
- double x1=sec->GetX(i1), y1=r1[is]->fY, z1=r1[is]->fZ;
- for (int js=0; js < nl+nm+nu; js++) {
- const AliTPCcluster *cl;
- int ks;
- double 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];
- 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];
- 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];
- y2=cl->fY; z2=cl->fZ;
- tmp=x2*cs-y2*sn;
- y2 =x2*sn+y2*cs; x2=tmp;
- }
-
- double d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
- if (d==0.) {cerr<<"MakeSeeds warning: Straight seed !\n"; continue;}
-
- 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(4)=f3(x1,y1,x2,y2,z1,z2);
-
- if (TMath::Abs(x(2)*x1-x(3)) >= 0.999) continue;
-
- if (TMath::Abs(x(4)) > 1.2) 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;
-
- 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.;
- 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(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;
- F(4,3)=(f3(x1,y1,x2,y2,z1,z2+sz)-x(4))/sz;
- F(4,4)=0;
- F(3,3)=0;
-
- TMatrix t(F,TMatrix::kMult,X);
- C.Mult(t,TMatrix(TMatrix::kTransposed,F));
-
- AliTPCtrack *track=new AliTPCtrack(r1[is], x, C, x1, ns*alpha+shift);
- int 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()
-{
+void AliTPC::Clusters2Tracks(TFile *of) {
//-----------------------------------------------------------------
// This is a track finder.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
//-----------------------------------------------------------------
- if (!fClusters) return;
-
- AliTPCParam *p=&fDigParam->GetParam();
- AliTPCSector::SetParam(p);
-
- const int nis=p->GetNInnerSector()/2;
- AliTPCSSector *ssec=new AliTPCSSector[nis];
- int nrow_low=ssec->GetNRows();
-
- const int nos=p->GetNOuterSector()/2;
- AliTPCLSector *lsec=new AliTPCLSector[nos];
- int nrow_up=lsec->GetNRows();
-
- int ncl=fClusters->GetEntriesFast();
- while (ncl--) {
- AliTPCcluster *c=(AliTPCcluster*)fClusters->UncheckedAt(ncl);
- Int_t sec=c->fSector, row=c->fPadRow;
- if (sec<nis*2) {
- ssec[sec%nis][row].InsertCluster(c);
- } else {
- sec -= nis*2;
- lsec[sec%nos][row].InsertCluster(c);
- }
- }
-
- TObjArray seeds(20000);
-
- int nrows=nrow_low+nrow_up;
- int gap=int(0.125*nrows), shift=int(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));
- double 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())%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(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,ns)) continue;
-
- if (t < int(0.4*nrows)) continue;
-
- AddTrack(t);
- t.UseClusters();
- cerr<<found++<<'\r';
- }
-
- delete[] ssec;
- delete[] lsec;
+ AliTPCtracker::Clusters2Tracks(fTPCParam,of);
}
//_____________________________________________________________________________
// Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
//-----------------------------------------------------------------
- Int_t ISXFLD=gAlice->Field()->Integ();
- Float_t SXMGMX=gAlice->Field()->Max();
+ Int_t iSXFLD=gAlice->Field()->Integ();
+ Float_t sXMGMX=gAlice->Field()->Max();
Float_t amat[5]; // atomic numbers
Float_t zmat[5]; // z
// Ne
- Float_t a_ne = 20.18;
- Float_t z_ne = 10.;
+ Float_t aNe = 20.18;
+ Float_t zNe = 10.;
density = 0.0009;
- AliMaterial(20,"Ne",a_ne,z_ne,density,999.,999.);
+ AliMaterial(20,"Ne",aNe,zNe,density,999.,999.);
// Ar
- Float_t a_ar = 39.948;
- Float_t z_ar = 18.;
+ Float_t aAr = 39.948;
+ Float_t zAr = 18.;
density = 0.001782;
- AliMaterial(21,"Ar",a_ar,z_ar,density,999.,999.);
+ AliMaterial(21,"Ar",aAr,zAr,density,999.,999.);
- Float_t a_pure[2];
+ Float_t aPure[2];
- a_pure[0] = a_ne;
- a_pure[1] = a_ar;
+ aPure[0] = aNe;
+ aPure[1] = aAr;
//--------------------------------------------------------------
Float_t am=0;
Int_t nc;
- Float_t a,z,rho,absl,X0,buf[1];
+ 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);
+ 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]);
+ am += fMixtProp[nc]*((fMixtComp[nc]>=20) ? aPure[nnc] : amol[nnc]);
density += fMixtProp[nc]*rho; // density of the mixture
}
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;
+ wmat[nc] = fMixtProp[nc]*((fMixtComp[nc]>=20) ? aPure[nnc] : amol[nnc])/am;
}
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);
+ 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);
+ AliMedium(24, "Air", 24, 0, iSXFLD, sXMGMX, 10., .1, .1, .1, .1);
//----------------------------------------------------------------------
// solid materials
AliMaterial(30, "Al", 26.98, 13., 2.7, 8.9, 37.2);
- AliMedium(0, "Al",30, 0, ISXFLD, SXMGMX, 10., .1, .1, .1, .1);
+ 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);
+ AliMedium(7, "Al",31, 0, iSXFLD, sXMGMX, 10., .1, .1, .1, .1);
// Mylar C5H4O2
AliMixture(32, "Mylar",amat,zmat,density,-3,wmat);
- AliMedium(5, "Mylar",32, 0, ISXFLD, SXMGMX, 10., .1, .1, .001, .01);
+ AliMedium(5, "Mylar",32, 0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
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);
+ 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
AliMixture(34,"G10 aux.",amat,zmat,density,-2,wmat);
- gMC->Gfmate((*fIdmate)[34],namate,a,z,rho,X0,absl,buf,nbuf);
+ gMC->Gfmate((*fIdmate)[34],namate,a,z,rho,x0,absl,buf,nbuf);
Float_t thickX0 = 0.0052; // field cage in X0 units
Float_t thick = 2.; // in cm
- X0=19.4; // G10
+ x0=19.4; // G10
- rhoFactor = X0*thickX0/thick;
+ 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);
+ 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;
+ 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);
+ AliMedium(9,"G10-iv",36,0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
// Carbon fibre
- gMC->Gfmate((*fIdmate)[33],namate,a,z,rho,X0,absl,buf,nbuf);
+ gMC->Gfmate((*fIdmate)[33],namate,a,z,rho,x0,absl,buf,nbuf);
thickX0 = 0.0133; // outer vessel
thick=3.0;
- rhoFactor = X0*thickX0/thick;
+ 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);
+ 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;
+ 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(11,"C-ivc",38,0, iSXFLD, sXMGMX, 10., .1, .1, .001, .01);
//
- AliMedium(12,"CO2",10,0, ISXFLD, SXMGMX, 10., 999.,.1, .001, .001);
+ AliMedium(12,"CO2",10,0, iSXFLD, sXMGMX, 10., 999.,.1, .001, .001);
-
-
}
-//_____________________________________________________________________________
-struct Bin {
- const AliTPCdigit *dig;
- int idx;
- Bin() {dig=0; idx=-1;}
-};
-
-struct PreCluster : public AliTPCcluster {
- const AliTPCdigit* summit; //pointer to the maximum digit of this precluster
- int idx; //index in AliTPC::fClusters
- int npeaks; //number of peaks in this precluster
- int ndigits; //number of digits in this precluster
- PreCluster();
-};
-PreCluster::PreCluster() : AliTPCcluster() {npeaks=ndigits=0;}
-
-//_____________________________________________________________________________
-static void FindPreCluster(int i,int j,int maxj,Bin *bins,PreCluster &c)
-{
- //-----------------------------------------------------------------
- // This function looks for "preclusters".
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- Bin& b=bins[i*maxj+j];
- double q=(double)TMath::Abs(b.dig->fSignal);
-
- 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;
-
- c.fY += i*q;
- c.fZ += j*q;
- c.fSigmaY2 += i*i*q;
- c.fSigmaZ2 += j*j*q;
- c.fQ += q;
- c.ndigits++;
-
- b.dig = 0; b.idx = c.idx;
-
- if (bins[(i-1)*maxj+j].dig) FindPreCluster(i-1,j,maxj,bins,c);
- if (bins[i*maxj+(j-1)].dig) FindPreCluster(i,j-1,maxj,bins,c);
- if (bins[(i+1)*maxj+j].dig) FindPreCluster(i+1,j,maxj,bins,c);
- if (bins[i*maxj+(j+1)].dig) FindPreCluster(i,j+1,maxj,bins,c);
-
-}
-//_____________________________________________________________________________
-void AliTPC::Digits2Clusters()
+void AliTPC::Digits2Clusters(TFile *of)
{
//-----------------------------------------------------------------
// This is a simple cluster finder.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
//-----------------------------------------------------------------
- AliTPCParam *par = &(fDigParam->GetParam());
-
- int inp=par->GetNPads(0, par->GetNRowLow()-1);
- int onp=par->GetNPads(par->GetNSector()-1,par->GetNRowUp() -1);
- const int MAXY=(inp>onp) ? inp+2 : onp+2;
- const int MAXTBKT=int((z_end+6*par->GetZSigma())/par->GetZWidth())+1;
- const int MAXZ=MAXTBKT+2;
- const int 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;
-
- for (Int_t n=0; n<sectors_by_rows; n++) {
- if (!t->GetEvent(n)) continue;
- Bin *bins=new Bin[MAXY*MAXZ];
- AliTPCdigit *dig=(AliTPCdigit*)fDigits->UncheckedAt(0);
- int sec=dig->fSector, row=dig->fPadRow;
- int ndigits=fDigits->GetEntriesFast();
-
- int npads, sign;
- {
- int 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 ndig;
- for (ndig=0; ndig<ndigits; ndig++) {
- dig=(AliTPCdigit*)fDigits->UncheckedAt(ndig);
- int i=dig->fPad+1, j=dig->fTime+1;
- if (i > npads) {
- cerr<<"AliTPC::Digits2Clusters error: pad number is out of range ! ";
- cerr<<i<<' '<<npads<<endl;
- continue;
- }
- if (j > MAXTBKT) {
- cerr<<"AliTPC::Digits2Clusters error: time bucket is out of range ! ";
- cerr<<j<<' '<<MAXTBKT<<endl;
- continue;
- }
- if (dig->fSignal >= THRESHOLD) bins[i*MAXZ+j].dig=dig;
- if (i==1 || i==npads || j==1 || j==MAXTBKT) dig->fSignal*=-1;
- }
-
- int ncl=0;
- int i,j;
-
- for (i=1; i<MAXY-1; i++) {
- for (j=1; j<MAXZ-1; j++) {
- if (bins[i*MAXZ+j].dig == 0) continue;
- PreCluster c; c.summit=bins[i*MAXZ+j].dig; c.idx=ncls;
- FindPreCluster(i, j, MAXZ, 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 *= par->GetPadPitchWidth()*par->GetPadPitchWidth();
- if (s2 != 0.) c.fSigmaY2 *= 0.17;
-
- 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 *= 0.41;
-
- c.fY = (c.fY - 0.5 - 0.5*npads)*par->GetPadPitchWidth();
- c.fZ = par->GetZWidth()*c.fZ;
- c.fZ -= 3.*par->GetZSigma(); // PASA delay
- c.fZ = sign*(z_end - c.fZ);
-
- c.fSector=sec;
- c.fPadRow=row;
- c.fTracks[0]=c.summit->fTracks[0];
- c.fTracks[1]=c.summit->fTracks[1];
- c.fTracks[2]=c.summit->fTracks[2];
-
- if (c.summit->fSignal<0) {
- c.fSigmaY2 *= 25.;
- c.fSigmaZ2 *= 4.;
- }
-
- AddCluster(c); ncls++; ncl++;
- }
- }
-
- for (ndig=0; ndig<ndigits; ndig++) {
- dig=(AliTPCdigit*)fDigits->UncheckedAt(ndig);
- int i=dig->fPad+1, j=dig->fTime+1;
- if (i > npads) {
- cerr<<"AliTPC::Digits2Clusters error: pad number is out of range ! ";
- cerr<<i<<' '<<npads<<endl;
- continue;
- }
- if (j > MAXTBKT) {
- cerr<<"AliTPC::Digits2Clusters error: time bucket is out of range ! ";
- cerr<<j<<' '<<MAXTBKT<<endl;
- continue;
- }
- if (TMath::Abs(dig->fSignal)>=par->GetZeroSup()) bins[i*MAXZ+j].dig=dig;
- }
-
- for (i=1; i<MAXY-1; i++) {
- for (j=1; j<MAXZ-1; j++) {
- if (bins[i*MAXZ+j].dig == 0) continue;
- PreCluster c; c.summit=bins[i*MAXZ+j].dig; c.idx=ncls;
- FindPreCluster(i, j, MAXZ, bins, c);
- if (c.ndigits < 2) 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 *= par->GetPadPitchWidth()*par->GetPadPitchWidth();
- if (s2 != 0.) c.fSigmaY2 *= 0.04;
-
- 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;
-
- c.fY = (c.fY - 0.5 - 0.5*npads)*par->GetPadPitchWidth();
- c.fZ = par->GetZWidth()*c.fZ;
- c.fZ -= 3.*par->GetZSigma(); // PASA delay
- c.fZ = sign*(z_end - c.fZ);
-
- c.fSector=sec;
- c.fPadRow=row;
- c.fTracks[0]=c.summit->fTracks[0];
- c.fTracks[1]=c.summit->fTracks[1];
- c.fTracks[2]=c.summit->fTracks[2];
-
- if (c.summit->fSignal<0) {
- c.fSigmaY2 *= 25.;
- c.fSigmaZ2 *= 4.;
- }
-
- if (c.npeaks==0) {AddCluster(c); ncls++; ncl++;}
- else {
- new ((*fClusters)[c.idx]) AliTPCcluster(c);
- }
- }
- }
-
- cerr<<"sector, row, digits, clusters: "
- <<sec<<' '<<row<<' '<<ndigits<<' '<<ncl<<" \r";
-
- fDigits->Clear();
-
- delete[] bins;
- }
+ AliTPCclusterer::Digits2Clusters(fTPCParam,of);
}
+extern Double_t SigmaY2(Double_t, Double_t, Double_t);
+extern Double_t SigmaZ2(Double_t, Double_t);
//_____________________________________________________________________________
-void AliTPC::ElDiff(Float_t *xyz)
+void AliTPC::Hits2Clusters(TFile *of)
{
- //--------------------------------------------------
- // calculates the diffusion of a single electron
- //--------------------------------------------------
+ //--------------------------------------------------------
+ // TPC simple cluster generator from hits
+ // obtained from the TPC Fast Simulator
+ // The point errors are taken from the parametrization
+ //--------------------------------------------------------
//-----------------------------------------------------------------
// Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
//-----------------------------------------------------------------
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- Float_t driftl;
+ // Adopted to Marian's cluster data structure by I.Belikov, CERN,
+ // Jouri.Belikov@cern.ch
+ //----------------------------------------------------------------
+
+ /////////////////////////////////////////////////////////////////////////////
+ //
+ //---------------------------------------------------------------------
+ // ALICE TPC Cluster Parameters
+ //--------------------------------------------------------------------
+
- Float_t z0=xyz[2];
-
- driftl=z_end-TMath::Abs(xyz[2]);
-
- if(driftl<0.01) driftl=0.01;
- // check the attachment
+ // Cluster width in rphi
+ const Float_t kACrphi=0.18322;
+ const Float_t kBCrphi=0.59551e-3;
+ const Float_t kCCrphi=0.60952e-1;
+ // Cluster width in z
+ const Float_t kACz=0.19081;
+ const Float_t kBCz=0.55938e-3;
+ const Float_t kCCz=0.30428;
- driftl=TMath::Sqrt(driftl);
+ TDirectory *savedir=gDirectory;
- // 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);
+ if (!of->IsOpen()) {
+ cerr<<"AliTPC::Hits2Clusters(): output file not open !\n";
+ return;
}
- if(xyz[2]*z0 < 0.){
- Float_t eps = 0.0001;
- xyz[2]=TMath::Sign(eps,z0);
- }
-}
-
-//_____________________________________________________________________________
-void AliTPC::Hits2Clusters()
-{
- //--------------------------------------------------------
- // TPC simple cluster generator from hits
- // obtained from the TPC Fast Simulator
- // The point errors are taken from the parametrization
- //--------------------------------------------------------
- //-----------------------------------------------------------------
- // Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
- //-----------------------------------------------------------------
+ if(fTPCParam == 0){
+ printf("AliTPCParam MUST be created firstly\n");
+ return;
+ }
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- Float_t sigma_rphi,sigma_z,cl_rphi,cl_z;
+ Float_t sigmaRphi,sigmaZ,clRphi,clZ;
//
TParticle *particle; // pointer to a given particle
AliTPChit *tpcHit; // pointer to a sigle TPC hit
- TClonesArray *Particles; //pointer to the particle list
+ TClonesArray *particles; //pointer to the particle list
Int_t sector,nhits;
Int_t ipart;
Float_t xyz[5];
// Get the access to the tracks
//---------------------------------------------------------------
- TTree *TH = gAlice->TreeH();
- Stat_t ntracks = TH->GetEntries();
- Particles=gAlice->Particles();
+ TTree *tH = gAlice->TreeH();
+ Stat_t ntracks = tH->GetEntries();
+ particles=gAlice->Particles();
+
+ //Switch to the output file
+ of->cd();
+
+ fTPCParam->Write(fTPCParam->GetTitle());
+ AliTPCClustersArray carray;
+ carray.Setup(fTPCParam);
+ carray.SetClusterType("AliTPCcluster");
+ carray.MakeTree();
+
+ Int_t nclusters=0; //cluster counter
//------------------------------------------------------------
- // Loop over all sectors (72 sectors)
- // Sectors 0-35 are lower sectors, 0-17 z>0, 18-35 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 0 starts at "0"
//------------------------------------------------------------
-
-
- //fClustersIndex[0] = 0;
-
- //
- int Nsectors=fDigParam->GetParam().GetNSector();
- for(Int_t isec=0; isec<Nsectors; 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 track=0;track<ntracks;track++){
ResetHits();
- TH->GetEvent(track);
+ tH->GetEvent(track);
//
- // Get number of the TPC hits and a pointer
- // to the particles
+ // Get number of the TPC hits
//
nhits=fHits->GetEntriesFast();
//
//
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;
- particle=(TParticle*)Particles->UncheckedAt(ipart);
+ particle=(TParticle*)particles->UncheckedAt(ipart);
pl=particle->Pz();
pt=particle->Pt();
if(pt < 1.e-9) pt=1.e-9;
tanth = TMath::Abs(tanth);
rpad=TMath::Sqrt(tpcHit->fX*tpcHit->fX + tpcHit->fY*tpcHit->fY);
ratio=0.001*rpad/pt; // pt must be in MeV/c - historical reason
-
+
// space-point resolutions
- sigma_rphi=SigmaY2(rpad,tanth,pt);
- sigma_z =SigmaZ2(rpad,tanth );
+ sigmaRphi=SigmaY2(rpad,tanth,pt);
+ sigmaZ =SigmaZ2(rpad,tanth );
// cluster widths
- cl_rphi=ac_rphi-bc_rphi*rpad*tanth+cc_rphi*ratio*ratio;
- cl_z=ac_z-bc_z*rpad*tanth+cc_z*tanth*tanth;
+ clRphi=kACrphi-kBCrphi*rpad*tanth+kCCrphi*ratio*ratio;
+ clZ=kACz-kBCz*rpad*tanth+kCCz*tanth*tanth;
// temporary protection
- if(sigma_rphi < 0.) sigma_rphi=0.4e-3;
- if(sigma_z < 0.) sigma_z=0.4e-3;
- if(cl_rphi < 0.) cl_rphi=2.5e-3;
- if(cl_z < 0.) cl_z=2.5e-5;
+ if(sigmaRphi < 0.) sigmaRphi=0.4e-3;
+ if(sigmaZ < 0.) sigmaZ=0.4e-3;
+ if(clRphi < 0.) clRphi=2.5e-3;
+ if(clZ < 0.) clZ=2.5e-5;
//
- // smearing --> rotate sectors firstly,
+
+ //
+ // 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 < fTPCParam->GetNInnerSector()) ?
- fTPCParam->GetInnerAngle() : fTPCParam->GetOuterAngle();
- 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+1;// q; let it be not equal to zero (Y.Belikov)
- xyz[3]=sigma_rphi; // fSigmaY2
- xyz[4]=sigma_z; // fSigmaZ2
-
- // and finally add the cluster
- Int_t tracks[5]={tpcHit->fTrack, -1, -1, sector, tpcHit->fPadRow};
- AddCluster(xyz,tracks);
-
+ xyz[0]=gRandom->Gaus(yprim,TMath::Sqrt(sigmaRphi)); // y
+ Float_t alpha=(isec < fTPCParam->GetNInnerSector()) ?
+ fTPCParam->GetInnerAngle() : fTPCParam->GetOuterAngle();
+ Float_t ymax=xprim*TMath::Tan(0.5*alpha);
+ if (TMath::Abs(xyz[0])>ymax) xyz[0]=yprim;
+ xyz[1]=gRandom->Gaus(tpcHit->fZ,TMath::Sqrt(sigmaZ)); // z
+ if (TMath::Abs(xyz[1])>fTPCParam->GetZLength()) xyz[1]=tpcHit->fZ;
+ xyz[2]=tpcHit->fQ; // q
+ xyz[3]=sigmaRphi; // fSigmaY2
+ xyz[4]=sigmaZ; // fSigmaZ2
+
+ AliTPCClustersRow *clrow=carray.GetRow(sector,tpcHit->fPadRow);
+ if (!clrow) clrow=carray.CreateRow(sector,tpcHit->fPadRow);
+
+ Int_t tracks[3]={tpcHit->fTrack, -1, -1};
+ AliTPCcluster cluster(xyz,tracks);
+
+ clrow->InsertCluster(&cluster); nclusters++;
+
} // end of loop over hits
- } // end of loop over tracks
-
- //fClustersIndex[isec] = fNclusters; // update clusters index
-
- } // end of loop over sectors
+
+ } // end of loop over tracks
+
+ Int_t nrows=fTPCParam->GetNRow(isec);
+ for (Int_t irow=0; irow<nrows; irow++) {
+ AliTPCClustersRow *clrow=carray.GetRow(isec,irow);
+ if (!clrow) continue;
+ carray.StoreRow(isec,irow);
+ carray.ClearRow(isec,irow);
+ }
+
+ } // end of loop over sectors
+
+ cerr<<"Number of made clusters : "<<nclusters<<" \n";
+
+ carray.GetTree()->Write();
+
+ savedir->cd(); //switch back to the input file
+
+} // 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 kcmaxhits=30000;
+ TVector * xxxx = new TVector(kcmaxhits*4);
+ TVector & xxx = *xxxx;
+ Int_t maxhits = kcmaxhits;
+ //construct array for each padrow
+ for (Int_t i=0; i<fTPCParam->GetNRow(isec);i++)
+ fClustersArray->CreateRow(isec,i);
- //fClustersIndex[fNsectors]--; // set end of the clusters buffer
+ //---------------------------------------------------------------
+ // 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+=kcmaxhits;
+ 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 0-35 are lower sectors, 0-17 z>0, 18-35 z<0
- // Sectors 36-71 are upper sectors, 36-53 z>0, 54-71 z<0
- //----
- int Nsectors=fDigParam->GetParam().GetNSector();
- for(Int_t isec=0;isec<Nsectors;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();
+
+ TTree *tH = gAlice->TreeH(); // pointer to the hits tree
+ Stat_t ntracks = tH->GetEntries();
if( ntracks > 0){
// 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= new TObjArray* [nrows];
- MakeSector(isec,nrows,TH,ntracks,row);
+ MakeSector(isec,nrows,tH,ntracks,row);
//--------------------------------------------------------
// Digitize this sector, row by row
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 (fDigitsArray->GetTree()==0) fDigitsArray->MakeTree();
- if(i != 1 && i != nrows-1){
- MakeTriplet(i,rowTriplet,row);
- }
+ for (i=0;i<nrows;i++){
- DigitizeRow(i,isec,rowTriplet);
+ AliDigits * dig = fDigitsArray->CreateRow(isec,i);
- fDigParam->Fill();
+ DigitizeRow(i,isec,row);
- Int_t ndig=fDigParam->GetArray()->GetEntriesFast();
+ fDigitsArray->StoreRow(isec,i);
- printf("*** Sector, row, digits %d %d %d ***\n",isec,i,ndig);
+ Int_t ndig = dig->GetDigitSize();
+
+ printf("*** Sector, row, compressed digits %d %d %d ***\n",isec,i,ndig);
+
+ fDigitsArray->ClearRow(isec,i);
- 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();
-
+ for(i=0;i<nrows;i++){
+ row[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!!!
+} // end of Hits2DigitsSector
- 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)
+void AliTPC::DigitizeRow(Int_t irow,Int_t isec,TObjArray **rows)
{
//-----------------------------------------------------------
// Single row digitization, coupling from the neighbouring
//-----------------------------------------------------------------
// Origin: Marek Kowalski IFJ, Krakow, Marek.Kowalski@ifj.edu.pl
+ // Modified: Marian Ivanov GSI Darmstadt, m.ivanov@gsi.de
//-----------------------------------------------------------------
- AliTPCParam * fTPCParam = &(fDigParam->GetParam());
- Float_t chipgain= fTPCParam->GetChipGain();
Float_t zerosup = fTPCParam->GetZeroSup();
Int_t nrows =fTPCParam->GetNRow(isec);
- const int MAXTBKT=
- int((z_end+6*fTPCParam->GetZSigma())/fTPCParam->GetZWidth())+1;
+ fCurrentIndex[1]= 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);
- }
- }
-
+ Int_t nofPads = fTPCParam->GetNPads(isec,irow);
+ Int_t nofTbins = fTPCParam->GetMaxTBin();
+ Int_t indexRange[4];
//
// Integrated signal for this row
// and a single track signal
- //
-
- TMatrix *m1 = new TMatrix(0,n_of_pads[iFlag]-1,0,MAXTBKT-1); // integrated
- TMatrix *m2 = new TMatrix(0,n_of_pads[iFlag]-1,0,MAXTBKT-1); // single
-
+ //
+ TMatrix *m1 = new TMatrix(0,nofPads,0,nofTbins); // integrated
+ TMatrix *m2 = new TMatrix(0,nofPads,0,nofTbins); // single
//
-
- TMatrix &Total = *m1;
+ TMatrix &total = *m1;
// Array of pointers to the label-signal list
- Int_t NofDigits = n_of_pads[iFlag]*MAXTBKT; // number of digits for this row
-
- Float_t **pList = new Float_t* [NofDigits];
+ Int_t nofDigits = nofPads*nofTbins; // 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++){
-
- m2->Zero(); // clear single track signal matrix
-
- Float_t TrackLabel =
- GetSignal(rowTriplet[iFlag],i1,n_of_pads[iFlag],m2,m1,IndexRange);
-
- GetList(TrackLabel,n_of_pads[iFlag],m2,IndexRange,pList);
-
- }
-
- //
- // Cross talk from the neighbouring pad-rows
- //
-
- TMatrix *m3 = new TMatrix(0,n_of_pads[iFlag]-1,0,MAXTBKT-1); // cross-talk
-
- TMatrix &Cross = *m3;
-
- if(iFlag == 0){
-
- // cross-talk from the outer row only (first pad row)
-
- GetCrossTalk(0,rowTriplet[1],nTracks[1],n_of_pads,m3);
-
- }
- else if(iFlag == 2){
-
- // cross-talk from the inner row only (last pad row)
-
- GetCrossTalk(2,rowTriplet[1],nTracks[1],n_of_pads,m3);
-
- }
- else{
-
- // cross-talk from both inner and outer rows
-
- GetCrossTalk(3,rowTriplet[0],nTracks[0],n_of_pads,m3); // inner
- GetCrossTalk(4,rowTriplet[2],nTracks[2],n_of_pads,m3); //outer
+ Int_t i1;
+ for(lp=0;lp<nofDigits;lp++)pList[lp]=0; // set all pointers to NULL
+ //
+ //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,nofPads,m2,indexRange,pList);
+ }
+ else GetSignal(rows[row],i1,0,m1,indexRange);
+ }
}
-
- Total += Cross; // add the cross-talk
-
- //
- // Convert analog signal to ADC counts
- //
-
+
Int_t tracks[3];
- Int_t digits[5];
+ AliDigits *dig = fDigitsArray->GetRow(isec,irow);
+ for(Int_t ip=0;ip<nofPads;ip++){
+ for(Int_t it=0;it<nofTbins;it++){
- for(Int_t ip=0;ip<n_of_pads[iFlag];ip++){
- for(Int_t it=0;it<MAXTBKT;it++){
+ Float_t q = total(ip,it);
- Float_t q = Total(ip,it);
+ Int_t gi =it*nofPads+ip; // global index
- Int_t gi =it*n_of_pads[iFlag]+ip; // global index
+ q = gRandom->Gaus(q,fTPCParam->GetNoise()*fTPCParam->GetNoiseNormFac());
- 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 = (Int_t)q;
- if(q <zerosup) continue; // do not fill zeros
- if(q > adc_sat) q = adc_sat; // saturation
+ if(q <=zerosup) continue; // do not fill zeros
+ if(q > fTPCParam->GetADCSat()) q = fTPCParam->GetADCSat(); // saturation
//
// "real" signal or electronic noise (list = -1)?
tracks[j1] = (pList[gi]) ?(Int_t)(*(pList[gi]+j1)) : -1;
}
- digits[0]=isec;
- digits[1]=irow;
- 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
// This row has been digitized, delete nonused stuff
//
- for(lp=0;lp<NofDigits;lp++){
+ for(lp=0;lp<nofDigits;lp++){
if(pList[lp]) delete [] pList[lp];
}
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,
- Int_t *IndexRange)
+
+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());
- const int MAXTBKT=
- int((z_end+6*fTPCParam->GetZSigma())/fTPCParam->GetZWidth())+1;
- //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
+ indexRange[0]=9999; // min pad
+ indexRange[1]=-1; // max pad
+ indexRange[2]=9999; //min time
+ indexRange[3]=-1; // max time
- 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
+ // Float_t IneffFactor = 0.5; // inefficiency in the gain close to the edge, as above
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
-
//
// 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(0,PadNumber-3);
- Int_t RightPad = TMath::Min(np-1,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*zwidthm1;
- Float_t z_offset = z_drift-(Int_t)z_drift;
-
- Int_t FirstBucket = (Int_t)z_drift; // numbering starts from "0"
-
-
- // 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)+1.-z_offset)*zwidth;
- Float_t ampl = fRF->GetRF(dz);
- if( (TrueTime>MAXTBKT-1) ) 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
}
//_____________________________________________________________________________
-void AliTPC::GetList(Float_t label,Int_t np,TMatrix *m,Int_t *IndexRange,
+void AliTPC::GetList(Float_t label,Int_t np,TMatrix *m,Int_t *indexRange,
Float_t **pList)
{
//----------------------------------------------------------------------
// lop over nonzero digits
- for(Int_t it=IndexRange[2];it<IndexRange[3]+1;it++){
- for(Int_t ip=IndexRange[0];ip<IndexRange[1]+1;ip++){
+ for(Int_t it=indexRange[2];it<indexRange[3]+1;it++){
+ for(Int_t ip=indexRange[0];ip<indexRange[1]+1;ip++){
- Int_t GlobalIndex = it*np+ip; // 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]){
+ 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];
+ pList[globalIndex] = new Float_t [6];
// set list to -1
- *pList[GlobalIndex] = -1.;
- *(pList[GlobalIndex]+1) = -1.;
- *(pList[GlobalIndex]+2) = -1.;
- *(pList[GlobalIndex]+3) = -1.;
- *(pList[GlobalIndex]+4) = -1.;
- *(pList[GlobalIndex]+5) = -1.;
+ *pList[globalIndex] = -1.;
+ *(pList[globalIndex]+1) = -1.;
+ *(pList[globalIndex]+2) = -1.;
+ *(pList[globalIndex]+3) = -1.;
+ *(pList[globalIndex]+4) = -1.;
+ *(pList[globalIndex]+5) = -1.;
- *pList[GlobalIndex] = label;
- *(pList[GlobalIndex]+3) = signal(ip,it);}
+ *pList[globalIndex] = label;
+ *(pList[globalIndex]+3) = signal(ip,it);
}
else{
// check the signal magnitude
- Float_t highest = *(pList[GlobalIndex]+3);
- Float_t middle = *(pList[GlobalIndex]+4);
- Float_t lowest = *(pList[GlobalIndex]+5);
+ Float_t highest = *(pList[globalIndex]+3);
+ Float_t middle = *(pList[globalIndex]+4);
+ Float_t lowest = *(pList[globalIndex]+5);
//
// compare the new signal with already existing list
//
if (signal(ip,it)>highest){
- *(pList[GlobalIndex]+5) = middle;
- *(pList[GlobalIndex]+4) = highest;
- *(pList[GlobalIndex]+3) = signal(ip,it);
+ *(pList[globalIndex]+5) = middle;
+ *(pList[globalIndex]+4) = highest;
+ *(pList[globalIndex]+3) = signal(ip,it);
- *(pList[GlobalIndex]+2) = *(pList[GlobalIndex]+1);
- *(pList[GlobalIndex]+1) = *pList[GlobalIndex];
- *pList[GlobalIndex] = label;
+ *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
+ *(pList[globalIndex]+1) = *pList[globalIndex];
+ *pList[globalIndex] = label;
}
else if (signal(ip,it)>middle){
- *(pList[GlobalIndex]+5) = middle;
- *(pList[GlobalIndex]+4) = signal(ip,it);
+ *(pList[globalIndex]+5) = middle;
+ *(pList[globalIndex]+4) = signal(ip,it);
- *(pList[GlobalIndex]+2) = *(pList[GlobalIndex]+1);
- *(pList[GlobalIndex]+1) = label;
+ *(pList[globalIndex]+2) = *(pList[globalIndex]+1);
+ *(pList[globalIndex]+1) = label;
}
else{
- *(pList[GlobalIndex]+5) = signal(ip,it);
- *(pList[GlobalIndex]+2) = label;
+ *(pList[globalIndex]+5) = signal(ip,it);
+ *(pList[globalIndex]+2) = label;
}
}
-
}//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
// of electrons, one TVector per each track.
//----------------------------------------------
+ Int_t *nofElectrons = new Int_t [nrows]; // electron counter for each row
+ TVector **tracks = new TVector* [nrows]; //pointers to the track vectors
for(i=0; i<nrows; i++){
row[i] = new TObjArray;
+ nofElectrons[i]=0;
+ tracks[i]=0;
}
- Int_t *n_of_electrons = new Int_t [nrows]; // electron counter for each row
- TVector **tr = 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];
+ if(nofElectrons[i]>0){
+ 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*nofElectrons[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
+ nofElectrons[i]=0;
+ tracks[i] = new TVector(481); // TVectors for the next fTrack
} // end of loop over rows
previousTrack=currentTrack; // update track label
}
- Int_t QI = (Int_t) (tpcHit->fQ); // energy loss (number of electrons)
+ Int_t qI = (Int_t) (tpcHit->fQ); // energy loss (number of electrons)
//---------------------------------------------------
// 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()*
+ Float_t attProb = fTPCParam->GetAttCoef()*
fTPCParam->GetOxyCont()*time; // fraction!
//-----------------------------------------------
// Loop over electrons
//-----------------------------------------------
-
- for(Int_t nel=0;nel<QI;nel++){
+ 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!
+ 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
- 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
- n_of_electrons[row_number]++;
+ xyz[2]=tpcHit->fZ;
+ xyz[3]= (Float_t) (-gasgain*TMath::Log(gRandom->Rndm()));
+ index[0]=1;
+
+ TransportElectron(xyz,index); //MI change -august
+ Int_t rowNumber;
+ fTPCParam->GetPadRow(xyz,index); //MI change august
+ rowNumber = index[2];
+ //transform position to local digit coordinates
+ //relative to nearest pad row
+ if ((rowNumber<0)||rowNumber>=fTPCParam->GetNRow(isec)) continue;
+ nofElectrons[rowNumber]++;
//----------------------------------
// 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
+ if(nofElectrons[rowNumber]>120){
+ Int_t range = tracks[rowNumber]->GetNrows();
+ if((nofElectrons[rowNumber])>(range-1)/4){
+
+ tracks[rowNumber]->ResizeTo(range+400); // Add 100 electrons
}
}
- TVector &v = *tr[row_number];
- Int_t idx = 3*n_of_electrons[row_number]-2;
+ TVector &v = *tracks[rowNumber];
+ Int_t idx = 4*nofElectrons[rowNumber]-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];
+ if(nofElectrons[i]>0){
+ 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*nofElectrons[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());
- const int MAXTBKT=
- int((z_end+6*fTPCParam->GetZSigma())/fTPCParam->GetZWidth())+1;
+ delete [] tracks;
+ delete [] nofElectrons;
- //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+(i-3)*fTPCParam->GetPadPitchWidth(),xwire)*aval;
-
- PadSignal[i] *= fTPCParam->GetPadCoupling();
- }
- // real pad range
-
- Int_t LeftPad = TMath::Max(0,PadNumber-3);
- Int_t RightPad = TMath::Min(nPadsSignal-1,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*zwidthm1;
- Float_t z_offset = z_drift-(Int_t)z_drift;
-
- Int_t FirstBucket = (Int_t)z_drift; // numbering starts from "0"
-
- for (Int_t i2=0;i2<4;i2++){
- Int_t TrueTime = FirstBucket+i2; // current time bucket
- Float_t dz = (Float_t(i2)+1.- z_offset)*zwidth;
- Float_t ampl = fRF->GetRF(dz);
- if((TrueTime>MAXTBKT-1)) 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 || TruePad > nPadsSignal-nPadsDiff-1) 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
//_____________________________________________________________________________
AliDetector::MakeBranch(option);
- char *D = strstr(option,"D");
+ char *d = strstr(option,"D");
- if (fDigits && gAlice->TreeD() && D) {
+ if (fDigits && gAlice->TreeD() && d) {
gAlice->TreeD()->Branch(branchname,&fDigits, buffersize);
printf("Making Branch %s for digits\n",branchname);
}
-
- char *R = strstr(option,"R");
-
- if (fClusters && gAlice->TreeR() && R) {
- gAlice->TreeR()->Branch(branchname,&fClusters, buffersize);
- printf("Making Branch %s for Clusters\n",branchname);
- }
}
//_____________________________________________________________________________
{
//
// Reset number of digits and the digits array for this detector
- // reset clusters
//
fNdigits = 0;
- // if (fDigits) fDigits->Clear();
- if (fDigParam->GetArray()!=0) fDigParam->GetArray()->Clear();
- fNclusters = 0;
- if (fClusters) fClusters->Clear();
+ if (fDigits) fDigits->Clear();
}
//_____________________________________________________________________________
fSens = sens;
}
-void AliTPC::SetSide(Float_t side)
+void AliTPC::SetSide(Float_t side=0.)
{
+ // choice of the TPC side
+
fSide = side;
}
Float_t p2,Float_t p3)
{
+ // gax mixture definition
+
fNoComp = nc;
fMixtComp[0]=c1;
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 sigT = driftl*(fTPCParam->GetDiffT());
+ Float_t sigL = driftl*(fTPCParam->GetDiffL());
+ xyz[0]=gRandom->Gaus(xyz[0],sigT);
+ xyz[1]=gRandom->Gaus(xyz[1],sigT);
+ xyz[2]=gRandom->Gaus(xyz[2],sigL);
+
+ // 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)
AliDetector::Streamer(R__b);
if (R__v < 2) return;
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);
R__b << fNsectors;
- R__b << fNclusters;
- R__b << fNtracks;
}
}
-ClassImp(AliTPCcluster)
-
-//_____________________________________________________________________________
-AliTPCcluster::AliTPCcluster(Float_t *hits, Int_t *lab)
-{
- //
- // Creates a simulated cluster for the TPC
- //
- fTracks[0] = lab[0];
- fTracks[1] = lab[1];
- fTracks[2] = lab[2];
- fSector = lab[3];
- fPadRow = lab[4];
- fY = hits[0];
- fZ = hits[1];
- fQ = hits[2];
- fSigmaY2 = hits[3];
- fSigmaZ2 = hits[4];
-}
-
-//_____________________________________________________________________________
-void AliTPCcluster::GetXYZ(Float_t *x, const AliTPCParam *par) const
-{
- //
- // Transformation from local to global coordinate system
- //
- x[0]=par->GetPadRowRadii(fSector,fPadRow);
- x[1]=fY;
- x[2]=fZ;
- par->CRXYZtoXYZ(x,fSector,fPadRow,1);
- x[2]=fZ;
-}
-
-//_____________________________________________________________________________
-Int_t AliTPCcluster::Compare(TObject * o)
-{
- //
- // compare two clusters according y coordinata
- //
- AliTPCcluster *cl= (AliTPCcluster *)o;
- if (fY<cl->fY) return -1;
- if (fY==cl->fY) return 0;
- return 1;
-}
-
-Bool_t AliTPCcluster::IsSortable() const
-{
- //
- //make AliTPCcluster sortabale
- //
- return kTRUE;
-}
-
-
-
ClassImp(AliTPCdigit)
//_____________________________________________________________________________
fQ = hits[3];
}
-
-ClassImp(AliTPCtrack)
-
-//_____________________________________________________________________________
-AliTPCtrack::AliTPCtrack(Float_t *hits)
-{
- //
- // Default creator for a TPC reconstructed track object
- //
- fX=hits[0]; // This is dummy code !
-}
-
-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.
- //
- // 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),
- fClusters(t.fClusters.GetEntriesFast())
-{
- //-----------------------------------------------------------------
- // This is a track copy constructor.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- fX=t.fX;
- fChi2=t.fChi2;
- fAlpha=t.fAlpha;
- int n=t.fClusters.GetEntriesFast();
- for (int i=0; i<n; i++) fClusters.AddLast(t.fClusters.UncheckedAt(i));
-}
-
-//_____________________________________________________________________________
-Int_t AliTPCtrack::Compare(TObject *o) {
- //-----------------------------------------------------------------
- // This function compares tracks according to their curvature.
- //
- // 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)
-{
- //-----------------------------------------------------------------
- // This function propagates a track to a reference plane x=xk.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- if (TMath::Abs(x(2)*xk - x(3)) >= 0.999) {
- if (*this>4) cerr<<*this<<" AliTPCtrack warning: Propagation failed !\n";
- return 0;
- }
-
- Double_t x1=fX, x2=x1+0.5*(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);
-
- x(0) += dx*(c1+c2)/(r1+r2);
- x(1) += dx*(c1+c2)/(c1*r2 + c2*r1)*x(4);
-
- TMatrix F(5,5); F.UnitMatrix();
- Double_t 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);
- Double_t 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;
- TMatrix tmp(F,TMatrix::kMult,C);
- C.Mult(tmp,TMatrix(TMatrix::kTransposed,F));
-
- fX=x2;
-
- //Multiple scattering******************
- 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.;
- Q(2,2)=ez*ez+ey*ey; Q(2,3)=-ex*ey; Q(2,4)=-ex*ez;
- Q(3,2)=Q(2,3); Q(3,3)= ez*ez+ex*ex; Q(3,4)=-ey*ez;
- Q(4,2)=Q(2,4); Q(4,3)= Q(3,4); Q(4,4)=1.;
-
- F=0;
- F(2,2)=-x(2)*ex; F(2,3)=-x(2)*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);
- Q.Mult(tmp,TMatrix(TMatrix::kTransposed,F));
-
- Double_t p2=GetPt()*GetPt()*(1.+x(4)*x(4));
- Double_t beta2=p2/(p2 + pm*pm);
- Double_t d=sqrt((x1-fX)*(x1-fX)+(y1-x(0))*(y1-x(0))+(z1-x(1))*(z1-x(1)));
- d*=2.;
- 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=fX; 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));
-
- fX=x2;
-
- return 1;
-}
-
-//_____________________________________________________________________________
-void AliTPCtrack::PropagateToVertex(Double_t x0,Double_t rho,Double_t pm)
-{
- //-----------------------------------------------------------------
- // This function propagates tracks to the "vertex".
- //
- // 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);
- PropagateTo(xv,x0,rho,pm);
-}
-
-//_____________________________________________________________________________
-void AliTPCtrack::Update(const AliTPCcluster *c, Double_t chisq)
-{
- //-----------------------------------------------------------------
- // This function associates a clusters with this 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 V(2,2); V(0,0)=c->fSigmaY2; V(0,1)=0.; V(1,0)=0.; V(1,1)=c->fSigmaZ2;
-
- TMatrix tmp(H,TMatrix::kMult,C);
- TMatrix R(tmp,TMatrix::kMult,Ht); R+=V;
-
- Double_t det=(Double_t)R(0,0)*R(1,1) - (Double_t)R(0,1)*R(1,0);
- R(0,1)=R(0,0); R(0,0)=R(1,1); R(1,1)=R(0,1);
- R(1,0)*=-1; R(0,1)=R(1,0);
- R*=1./det;
-
- //R.Invert();
-
- 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)*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;
-
- fClusters.AddLast((AliTPCcluster*)c);
- fChi2 += chisq;
-}
-
-//_____________________________________________________________________________
-int AliTPCtrack::Rotate(Double_t alpha)
-{
- //-----------------------------------------------------------------
- // This function rotates this track.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- fAlpha += alpha;
-
- Double_t x1=fX, y1=x(0);
- Double_t ca=cos(alpha), sa=sin(alpha);
- Double_t r1=x(2)*fX - x(3);
-
- 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)*fX - x(3);
- if (TMath::Abs(r2) >= 0.999) {
- 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>4) cerr<<*this<<" AliTPCtrack warning: Rotation failed !!!\n";
- return 0;
- }
-
- TMatrix F(5,5); F.UnitMatrix();
- F(0,0)=ca;
- F(3,0)=x(2)*sa;
- F(3,2)=(y1 - r1*x1/sqrt(1.- r1*r1))*sa;
- F(3,3)= ca + sa*r1/sqrt(1.- r1*r1);
- TMatrix tmp(F,TMatrix::kMult,C);
- // Double_t dy2=C(0,0);
- C.Mult(tmp,TMatrix(TMatrix::kTransposed,F));
- // C(0,0)+=dy2*sa*sa*r1*r1/(1.- r1*r1);
- // C(1,1)+=dy2*sa*sa*x(4)*x(4)/(1.- r1*r1);
-
- return 1;
-}
-
-//_____________________________________________________________________________
-void AliTPCtrack::UseClusters() const
-{
- //-----------------------------------------------------------------
- // This function marks clusters associated with this track.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- int num_of_clusters=fClusters.GetEntriesFast();
- for (int i=0; i<num_of_clusters; i++) {
- //if (i<=14) continue;
- AliTPCcluster *c=(AliTPCcluster*)fClusters.UncheckedAt(i);
- c->Use();
- }
-}
-
-//_____________________________________________________________________________
-Double_t AliTPCtrack::GetPredictedChi2(const AliTPCcluster *c) const
-{
- //-----------------------------------------------------------------
- // This function calculates a predicted chi2 increment.
- //
- // 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;
- TVector res=x; res*=H; res-=m; //res*=-1;
- TMatrix tmp(H,TMatrix::kMult,C);
- TMatrix R(tmp,TMatrix::kMult,TMatrix(TMatrix::kTransposed,H)); R+=V;
-
- 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>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);
- R(1,0)*=-1; R(0,1)=R(1,0);
- R*=1./det;
-
- //R.Invert();
-
- TVector r=res;
- res*=R;
- return r*res;
-}
-
-//_____________________________________________________________________________
-struct S { int lab; int max; };
-int AliTPCtrack::GetLabel(int nrows) const
-{
- //-----------------------------------------------------------------
- // This function returns the track label. If label<0, this track is fake.
- //
- // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
- //-----------------------------------------------------------------
- int num_of_clusters=fClusters.GetEntriesFast();
- S *s=new S[num_of_clusters];
- int i;
- for (i=0; i<num_of_clusters; i++) s[i].lab=s[i].max=0;
-
- int lab=123456789;
- for (i=0; i<num_of_clusters; i++) {
- AliTPCcluster *c=(AliTPCcluster*)fClusters.UncheckedAt(i);
- lab=TMath::Abs(c->fTracks[0]);
- int 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;
- 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*)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;
-
- int tail=int(0.08*nrows);
- if (num_of_clusters < tail) return lab;
-
- max=0;
- 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 < int(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.
- //
- // 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)-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);
- px=tmp;
-}
-
-//_____________________________________________________________________________
-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 ncl=fClusters.GetEntriesFast();
- int n=0;
- Double_t *q=new Double_t[ncl];
- int i;
- for (i=0; i<ncl; i++) {
- AliTPCcluster *cl=(AliTPCcluster*)(fClusters.UncheckedAt(i));
- // if (cl->fdEdX > 3000) continue;
- if (cl->fdEdX <= 0) continue;
- q[n++]=cl->fdEdX;
- }
-
- //stupid sorting
- int 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 nl=int(low*n), nu=int(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);
- 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 {
- //-----------------------------------------------------------------------
- // 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;
- 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