#include <TPDGCode.h>
#include <TString.h>
#include "AliLog.h"
+#include "AliMathBase.h"
#include "AliTrackReference.h"
#include "AliTPCParam.h"
#include "AliTPCTrackHitsV2.h"
#include "TGeoCompositeShape.h"
#include "TGeoPara.h"
#include "TGeoPhysicalNode.h"
+#include "TGeoHalfSpace.h"
ClassImp(AliTPCv2)
SetBufferSize(128000);
- if (fTPCParam)
- fTPCParam->Write(fTPCParam->GetTitle());
+// if (fTPCParam)
+// fTPCParam->Write(fTPCParam->GetTitle());
}
//_____________________________________________________________________________
// here I define a volume TPC
// retrive the medium name with "TPC_" as a leading string
//
- TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
- tpc->DefineSection(0,-290.,77.,278.);
- tpc->DefineSection(1,-259.6,70.,278.);
+ TGeoPcon *tpc = new TGeoPcon(0.,360.,20); //20 sections
//
- tpc->DefineSection(2,-259.6,68.1,278.);
- tpc->DefineSection(3,-253.6,68.1,278.);
+ tpc->DefineSection(0,-291.,77.,278.);
+ tpc->DefineSection(1,-270,77.,278.);
//
- tpc->DefineSection(4,-253.6,68.,278.);
- tpc->DefineSection(5,-74.0,60.8,278.);
+ tpc->DefineSection(2,-270.,77.,278.);
+ tpc->DefineSection(3,-259.6,70.,278.);
//
- tpc->DefineSection(6,-74.0,60.1,278.);
- tpc->DefineSection(7,-73.3,60.1,278.);
+ tpc->DefineSection(4,-259.6,68.1,278.);
+ tpc->DefineSection(5,-253.6,68.1,278.);
//
- tpc->DefineSection(8,-73.3,56.9,278.);
- tpc->DefineSection(9,73.3,56.9,278.);
+ tpc->DefineSection(6,-253.6,68.,278.);
+ tpc->DefineSection(7,-74.0,60.8,278.);
//
- tpc->DefineSection(10,73.3,60.1,278.);
- tpc->DefineSection(11,74.0,60.1,278.);
+ tpc->DefineSection(8,-74.0,60.1,278.);
+ tpc->DefineSection(9,-73.3,60.1,278.);
//
- tpc->DefineSection(12,74.0,60.8,278.);
- tpc->DefineSection(13,253.6,65.5,278.);
+ tpc->DefineSection(10,-73.3,56.9,278.);
+ tpc->DefineSection(11,73.3,56.9,278.);
//
- tpc->DefineSection(14,253.6,65.6,278.);
- tpc->DefineSection(15,259.6,65.6,278.);
+ tpc->DefineSection(12,73.3,60.1,278.);
+ tpc->DefineSection(13,74.0,60.1,278.);
//
- tpc->DefineSection(16,259.6,70.0,278.);
- tpc->DefineSection(17,290.,77.,278.);
+ tpc->DefineSection(14,74.0,60.8,278.);
+ tpc->DefineSection(15,253.6,65.5,278.);
+ //
+ tpc->DefineSection(16,253.6,65.6,278.);
+ tpc->DefineSection(17,259.6,65.6,278.);
+ //
+ tpc->DefineSection(18,259.6,70.0,278.);
+ tpc->DefineSection(19,291.,77.,278.);
//
TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
//
// central membrane - 2 rings and a mylar membrane - assembly
//
- TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
- TGeoTube *oh = new TGeoTube(250.,256.,.5);
+ TGeoTube *ih = new TGeoTube(80.1,84.1,0.2);
+ TGeoTube *oh = new TGeoTube(250.,265.,0.2);
TGeoTube *mem = new TGeoTube(84.05,250,0.01);
TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
}
}//strips
//----------------------------------------------------------
- // TPc Support Rods - MAKROLON
+ // TPC Support Rods - MAKROLON
//----------------------------------------------------------
TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
- // upper and lower rods differ in length!
- delete [] upar;
- upar=NULL;
- gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
- upar=new Double_t [3];
- upar[0]=1.8;
- upar[1]=2.2;
-
+ TGeoMedium *m10 = gGeoManager->GetMedium("TPC_Alumina");
+ TGeoMedium *m11 = gGeoManager->GetMedium("TPC_Peek");
+ TGeoMedium *m12 = gGeoManager->GetMedium("TPC_Water");
+ TGeoMedium *m13 = gGeoManager->GetMedium("TPC_Brass");
+ //
+ // tpc rod is an assembly of 10 long parts and 2 short parts
+ // connected with alu rings and plagged on both sides.
+ //
+ //
+// tpc rod long
+//
+ TGeoPcon *rod = new TGeoPcon("rod",0.,360.,6);
+ rod->DefineSection(0,-10.43,1.92,2.08);
+ rod->DefineSection(1,-9.75,1.92,2.08);
+
+ rod->DefineSection(2,-9.75,1.8,2.2);
+ rod->DefineSection(3,9.75,1.8,2.2);
+
+ rod->DefineSection(4,9.75,1.92,2.08);
+ rod->DefineSection(5,10.43,1.92,2.08);
+ //
+ TGeoVolume *mrodl = new TGeoVolume("TPC_mrodl",rod,m6);
+ //
+ // tpc rod short
+ //
+ TGeoPcon *rod1 = new TGeoPcon("rod1",0.,360.,6);
+ rod1->DefineSection(0,-8.93,1.92,2.08);
+ rod1->DefineSection(1,-8.25,1.92,2.08);
+
+ rod1->DefineSection(2,-8.25,1.8,2.2);
+ rod1->DefineSection(3,8.25,1.8,2.2);
+
+ rod1->DefineSection(4,8.25,1.92,2.08);
+ rod1->DefineSection(5,8.93,1.92,2.08);
+ //
+ TGeoVolume *mrods = new TGeoVolume("TPC_mrods",rod1,m6);
+ //
+ // below is for the resistor rod
+ //
+ // hole for the brass connectors
+ //
+
+ new TGeoTube("hhole",0.,0.3,0.3);
+ //
+ //transformations for holes - initialy they
+ // are placed at x=0 and negative y
+ //
+ TGeoRotation *rhole = new TGeoRotation();
+ rhole->RotateX(90.);
+ TGeoCombiTrans *transf[13];
+ Char_t name[30];
+ for(Int_t i=0;i<13;i++){
+ sprintf(name,"transf%d",i);
+ transf[i]= new TGeoCombiTrans(name,0.,-2.,-9.+i*1.5,rhole);
+ transf[i]->RegisterYourself();
+ }
+ // union expression for holes
+ TString operl("hhole:transf0");
+ for (Int_t i=1;i<13;i++){
+ sprintf(name,"+hhole:transf%d",i);
+ operl.Append(name);
+ }
+ //
+ TString opers("hhole:transf1");
+ for (Int_t i=2;i<12;i++){
+ sprintf(name,"+hhole:transf%d",i);
+ opers.Append(name);
+ }
+ //union of holes
+ new TGeoCompositeShape("hlv",operl.Data());
+ new TGeoCompositeShape("hsv",opers.Data());
+ //
+ TGeoCompositeShape *rodl = new TGeoCompositeShape("rodl","rod-hlv");
+ TGeoCompositeShape *rods = new TGeoCompositeShape("rods","rod1-hsv");
+ //rods - volumes - makrolon rods with holes
+ TGeoVolume *rodlv = new TGeoVolume("TPC_rodl",rodl,m6);
+ TGeoVolume *rodsv = new TGeoVolume("TPC_rods",rods,m6);
+ //brass connectors
+ //connectors
+ TGeoTube *bcon = new TGeoTube(0.,0.3,0.3);//connectors
+ TGeoVolume *bconv = new TGeoVolume("TPC_bcon",bcon,m13);
+ //
+ // hooks holding strips
+ //
+ new TGeoBBox("hk1",0.625,0.015,0.75);
+ new TGeoBBox("hk2",0.625,0.015,0.15);
+ TGeoTranslation *tr21 = new TGeoTranslation("tr21",0.,-0.03,-0.6);
+ TGeoTranslation *tr12 = new TGeoTranslation("tr12",0.,-0.03,0.6);
+ tr21->RegisterYourself();
+ tr12->RegisterYourself();
+
+ TGeoCompositeShape *hook = new TGeoCompositeShape("hook","hk1+hk2:tr21+hk2:tr12");
+ TGeoVolume *hookv = new TGeoVolume("TPC_hook",hook,m13);
+ //
+ // assembly of the short rod with connectors and hooks
+ //
+ //
+ // short rod
+ //
+ TGeoVolumeAssembly *spart = new TGeoVolumeAssembly("TPC_spart");
+ //
+ spart->AddNode( rodsv,1);
+ for(Int_t i=1;i<12;i++){
+ spart->AddNode(bconv,i,transf[i]);
+ }
+ for(Int_t i =0;i<11;i++){
+ spart->AddNode(hookv,i+1,new TGeoTranslation(0.,-2.3,-7.5+i*1.5));
+ }
+ //
+ // long rod
+ //
+ TGeoVolumeAssembly *lpart = new TGeoVolumeAssembly("TPC_lpart");
+ //
+ lpart->AddNode( rodlv,1);
+ for(Int_t i=0;i<13;i++){
+ lpart->AddNode(bconv,i,transf[i]);
+ }
+ for(Int_t i =0;i<13;i++){
+ lpart->AddNode(hookv,i+1,new TGeoTranslation(0.,-2.3,-9.+i*1.5));
+ }
+ //
+ // alu ring
+ //
+ new TGeoTube("ring1",2.1075,2.235,0.53);
+ new TGeoTube("ring2",1.7925,1.89,0.43);
+ new TGeoTube("ring3",1.89,2.1075,0.05);
+ TGeoCompositeShape *ring = new TGeoCompositeShape("ring","ring1+ring2+ring3");
+ TGeoVolume *ringv = new TGeoVolume("TPC_ring",ring,m3);
+ //
+ // rod assembly
+ //
+ TGeoVolumeAssembly *tpcrod = new TGeoVolumeAssembly("TPC_rod");//rrod
+ TGeoVolumeAssembly *tpcmrod = new TGeoVolumeAssembly("TPC_mrod");//makrolon rod
+ //long pieces
+ for(Int_t i=0;i<11;i++){
+ tpcrod->AddNode(ringv,i+1,new TGeoTranslation(0.,0.,-105.+i*21));
+ tpcmrod->AddNode(ringv,i+12,new TGeoTranslation(0.,0.,-105.+i*21));
+ }
+ for(Int_t i=0;i<10;i++){
+ tpcrod->AddNode(lpart,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));
+ tpcmrod->AddNode(mrodl,i+1,new TGeoTranslation(0.,0.,-94.5+i*21));
+ }
+ //
+ // short pieces
+ //
+ tpcrod->AddNode(spart,1,new TGeoTranslation(0.,0.,-114.));
+ tpcrod->AddNode(spart,2,new TGeoTranslation(0.,0.,114.));
+ tpcrod->AddNode(ringv,23,new TGeoTranslation(0.,0.,-123.));
+ tpcrod->AddNode(ringv,24,new TGeoTranslation(0.,0.,123.));
+ //
+ tpcmrod->AddNode(mrods,1,new TGeoTranslation(0.,0.,-114.));
+ tpcmrod->AddNode(mrods,2,new TGeoTranslation(0.,0.,114.));
+ tpcmrod->AddNode(ringv,25,new TGeoTranslation(0.,0.,-123.));
+ tpcmrod->AddNode(ringv,26,new TGeoTranslation(0.,0.,123.));
+ //
+ // left plaque
+ //
+ TGeoPcon *lp = new TGeoPcon(0.,360.,4);
+ //
+ lp->DefineSection(0,-125.8,1.92,2.235);
+ lp->DefineSection(1,-124.8,1.92,2.235);
+ //
+ lp->DefineSection(2,-124.8,1.92,2.08);
+ lp->DefineSection(3,-123.1,1.92,2.08);
+ //
+ TGeoVolume *lpv1 = new TGeoVolume("TPC_lpv1",lp,m6);
+ TGeoVolume *lpv2 = new TGeoVolume("TPC_lpv2",lp,m6);
+ // left ring
+ TGeoTube *lr = new TGeoTube(2.1075,2.235,0.5);
+ TGeoVolume *lrv = new TGeoVolume("TPC_lrv",lr,m3);
+ //
+ lpv2->AddNode(lrv,1,new TGeoTranslation(0.,0.,-125.3));
+ //
+ tpcrod->AddNode(lpv2,1);
+ tpcmrod->AddNode(lpv1,1);
+ //
+ // right plaque
+ //
+ TGeoTube *rp = new TGeoTube(1.92,2.08,2.25);
+ TGeoVolume *rpv = new TGeoVolume("TPC_rpv",rp,m6);
+ tpcrod->AddNode(rpv,1, new TGeoTranslation(0.,0.,125.35));
+ tpcmrod->AddNode(rpv,2,new TGeoTranslation(0.,0.,125.35));
+ //
//
//HV rods - makrolon + 0.58cm (diameter) Cu
- TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
- TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
+ TGeoTube *hvr = new TGeoTube(0.,1.465,126.7);
+ TGeoTube *hvc = new TGeoTube(0.,0.29,126.7);
//
TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
hvrv->AddNode(hvcv,1);
+ //
+ //resistor rod
+ //
+ TGeoTube *cr = new TGeoTube(0.,0.45,126.7);
+ TGeoTube *cw = new TGeoTube(0.,0.15,126.7);
+ TGeoVolume *crv = new TGeoVolume("TPC_CR",cr,m10);
+ TGeoVolume *cwv = new TGeoVolume("TPC_W",cw,m11);
+ //
+ // ceramic rod with water
+ //
+ crv->AddNode(cwv,1);
+ //
+ //peek rod
+ //
+ TGeoTube *pr =new TGeoTube(0.2,0.35,126.7);
+ TGeoVolume *prv = new TGeoVolume("TPC_PR",pr,m12);
+ //
+ // copper plates with connectors
+ //
+ new TGeoTube("tub",0.,1.7,0.025);
+ //
+ // half space - points on the plane and a normal vector
+ //
+ Double_t n[3],p[3];
+ Double_t slope = TMath::Tan(22.*TMath::DegToRad());
+ Double_t intp = 1.245;
+ //
+ Double_t b = slope*slope+1.;
+ p[0]=intp*slope/b;
+ p[1]=-intp/b;
+ p[2]=0.;
+ //
+ n[0]=-p[0];
+ n[1]=-p[1];
+ n[2]=0.;
+ Double_t norm;
+ norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
+ n[0] /= norm;
+ n[1] /=norm;
+ //
+ new TGeoHalfSpace("sp1",p,n);
+ //
+ slope = -slope;
+ //
+ p[0]=intp*slope/b;
+ p[1]=-intp/b;
+ //
+ n[0]=-p[0];
+ n[1]=-p[1];
+ norm=TMath::Sqrt(n[0]*n[0]+n[1]*n[1]);
+ n[0] /= norm;
+ n[1] /=norm;
+ //
+ new TGeoHalfSpace("sp2",p,n);
+ // holes for rods
+ //holes
+ new TGeoTube("h1",0.,0.5,0.025);
+ new TGeoTube("h2",0.,0.35,0.025);
+ //translations:
+ TGeoTranslation *ttr11 = new TGeoTranslation("ttr11",-0.866,0.5,0.);
+ TGeoTranslation *ttr22 = new TGeoTranslation("ttr22",0.866,0.5,0.);
+ ttr11->RegisterYourself();
+ ttr22->RegisterYourself();
+ // elastic connector
+ new TGeoBBox("elcon",0.72,0.005,0.3);
+ TGeoRotation *crr1 = new TGeoRotation();
+ crr1->RotateZ(-22.);
+TGeoCombiTrans *ctr1 = new TGeoCombiTrans("ctr1",-0.36011, -1.09951,-0.325,crr1);
+ctr1->RegisterYourself();
+ TGeoCompositeShape *cs1 = new TGeoCompositeShape("cs1",
+"(((((tub-h1:ttr11)-h1:ttr22)-sp1)-sp2)-h2)+elcon:ctr1");
+ //
+ TGeoVolume *csvv = new TGeoVolume("TPC_RR_CU",cs1,m7);
+ //
+ // resistor rod assembly 2 ceramic rods, peak rod, Cu plates
+ // and resistors
+ //
+ TGeoVolumeAssembly *rrod = new TGeoVolumeAssembly("TPC_RROD");
+ // rods
+ rrod->AddNode(crv,1,ttr11);
+ rrod->AddNode(crv,2,ttr22);
+ rrod->AddNode(prv,1);
+ //Cu plates
+ for(Int_t i=0;i<165;i++){
+ rrod->AddNode(csvv,i+1,new TGeoTranslation(0.,0.,-122.675+i*1.5));
+ }
+ //resistors
+ TGeoTube *res = new TGeoTube(0.,0.15,0.5);
+ TGeoVolume *resv = new TGeoVolume("TPC_RES",res,m10);
+ TGeoVolumeAssembly *ress = new TGeoVolumeAssembly("TPC_RES_CH");
+ ress->AddNode(resv,1,new TGeoTranslation(0.2,0.,0.));
+ ress->AddNode(resv,2,new TGeoTranslation(-0.2,0.,0.));
+ //
+ TGeoRotation *crr2 = new TGeoRotation();
+ crr2->RotateY(30.);
+ TGeoRotation *crr3 = new TGeoRotation();
+ crr3->RotateY(-30.);
+ //
+ for(Int_t i=0;i<164;i+=2){
+ rrod->AddNode(ress,i+1, new TGeoCombiTrans(0.,1.2,-121.925+i*1.5,crr2));
+ rrod->AddNode(ress,i+2, new TGeoCombiTrans(0.,1.2,-121.925+(i+1)*1.5,crr3));
+ }
+ rrod->AddNode(tpcrod,1,new TGeoCombiTrans(0.,0.,0.9,crr1));
+
+ //------------------------------------------------------------------
+ TGeoRotation refl("refl",90.,0.,90.,90.,180.,0.);
+ TGeoRotation rotrod("rotrod");
+ TGeoRotation *rotpos = new TGeoRotation("rotpos");
+ //
+ TGeoRotation *rotrod1 = new TGeoRotation("rotrod1");
+ //v9 - drift gas
+
for(Int_t i=0;i<18;i++){
Double_t angle,x,y;
Double_t z,r;
angle=TMath::DegToRad()*20.*(Double_t)i;
+ //inner rods
r=81.5;
x=r * TMath::Cos(angle);
y=r * TMath::Sin(angle);
- upar[2]=126.64; //lower
- z= 126.96;
- if(i==15){
- v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
- v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
- }
- else{
- gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
- gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
+ z = 126.;
+ //
+ if(i==11){//resistor rod inner
+ rotrod.RotateZ(-90.+angle);
+ rotrod1->RotateZ(-90.+angle);
+ *rotpos = refl*rotrod; //rotation+reflection
+ v9->AddNode(rrod,1,new TGeoCombiTrans(x,y, z, rotrod1)); //A
+ v9->AddNode(rrod,2,new TGeoCombiTrans(x,y,-z, rotpos)); //C
+ }
+ else {
+ v9->AddNode(tpcmrod,i+1,new TGeoTranslation(x,y,z));//shaft
+ v9->AddNode(tpcmrod,i+19,new TGeoCombiTrans(x,y,-z,ref));//muon
}
+ // outer rods
r=254.25;
x=r * TMath::Cos(angle);
y=r * TMath::Sin(angle);
- upar[2]=126.54; //upper
- z=127.06;
- gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
- gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
- }
-
- delete [] upar;
+ z=126.;
+ rotrod.RotateZ(90.+angle);
+ rotrod1->RotateZ(90.+angle);
+ *rotpos = refl*rotrod;//rotation+reflection
+ //
+ if(i==3){//resistor rod outer
+ rotrod.RotateZ(90.+angle);
+ rotrod1->RotateZ(90.+angle);
+ *rotpos = refl*rotrod;//rotation+reflection
+ v9->AddNode(rrod,3,new TGeoCombiTrans(x,y, z, rotrod1)); //A
+ v9->AddNode(rrod,4,new TGeoCombiTrans(x,y, -z, rotpos)); //C
+ }
+ else {
+ v9->AddNode(tpcmrod,i+37,new TGeoTranslation(x,y,z));//shaft
+ v9->AddNode(tpcmrod,i+55,new TGeoCombiTrans(x,y,-z,ref));//muon
+ }
+ if(i==15){
+ v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z)); //hv->A-side only
+ }
+ } //end of rods positioning
TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
alice->AddNode(v1,1);
}
- AliInfo("*** TPC version 2 initialized ***");
- AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
+ AliDebug(1,"*** TPC version 2 initialized ***");
+ AliDebug(1,Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
//
const Float_t kprim = 14.35; // number of primary collisions per 1 cm
const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
-
+ const Int_t kMaxDistRef =15; // maximal difference between 2 stored references
const Float_t kbig = 1.e10;
fTPCParam->AdjustCosSin(sector,cos,sin);
Float_t x1=p[0]*cos + p[1]*sin;
// check if within sector's limits
- if(x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp()
- ||x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp()){
+ if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
+ ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
// calculate real sector number...
if (x1>fTPCParam->GetOuterRadiusLow()){
sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
//
vol[0]=sector;
+
+ static Double_t lastReferenceR=0;
+ if (TMath::Abs(lastReferenceR-r)>kMaxDistRef){
+ AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
+ lastReferenceR = r;
+ }
+
// check if change of sector
if(sector != fSecOld){
fSecOld=sector;
{
betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
- pp=kprim*BetheBloch(betaGamma);
+ pp=kprim*AliMathBase::BetheBlochAleph(betaGamma);
}
}
-//_____________________________________________________________________________
-Float_t AliTPCv2::BetheBloch(Float_t bg)
-{
- //
- // Bethe-Bloch energy loss formula
- //
- const Double_t kp1=0.76176e-1;
- const Double_t kp2=10.632;
- const Double_t kp3=0.13279e-4;
- const Double_t kp4=1.8631;
- const Double_t kp5=1.9479;
-
- Double_t dbg = (Double_t) bg;
-
- Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
-
- Double_t aa = TMath::Power(beta,kp4);
- Double_t bb = TMath::Power(1./dbg,kp5);
-
- bb=TMath::Log(kp3+bb);
-
- return ((Float_t)((kp2-aa-bb)*kp1/aa));
-}
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff