-/**************************************************************************
- * 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. *
- **************************************************************************/
+// **************************************************************************
+// * 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. *
+// **************************************************************************
+#include "AliRICHv1.h"
+#include "AliRICHParam.h"
+#include "AliRICHChamber.h"
#include <TParticle.h>
#include <TRandom.h>
#include <TVirtualMC.h>
#include <TPDGCode.h>
-#include "AliRICHv1.h"
-#include "AliRICHParam.h"
#include <AliConst.h>
#include <AliPDG.h>
#include <AliRun.h>
#include <AliMC.h>
ClassImp(AliRICHv1)
-//______________________________________________________________________________
-AliRICHv1::AliRICHv1(const char *name, const char *title)
- :AliRICH(name,title)
-{// Full version of RICH with hits and diagnostics
- if(GetDebug())Info("named ctor","Start.");
- if(GetDebug())Info("named ctor","Stop.");
-}//named ctor
-//______________________________________________________________________________
-void AliRICHv1::Init()
-{//nothing to do here, all the work in ctor or CreateGeometry()
- if(GetDebug())Info("Init","Start.");
- if(GetDebug())Info("Init","Stop.");
-}//void AliRICHv1::Init()
-//______________________________________________________________________________
+//__________________________________________________________________________________________________
void AliRICHv1::StepManager()
-{//Full Step Manager
-
- Int_t copy, id;
+{
+// Full Step Manager.
+// 3- Ckovs absorbed on Collection electrods
+// 5- Ckovs absorbed on Cathode wires
+// 6- Ckovs absorbed on Anod wires
+
+ Int_t copy;
static Int_t iCurrentChamber;
- static Int_t vol[2];
- Int_t ipart;
- static Float_t hits[22];
- static Float_t ckovData[19];
- TLorentzVector x4,p4;
- Float_t pos[3],mom[4],localPos[3],localMom[4];
- Float_t theta,phi,localTheta,localPhi;
- Float_t destep, step;
- Double_t ranf[2];
- Int_t nPads=kBad;
- Float_t coscerenkov;
- static Float_t eloss, tlength;
- const Float_t kBig=1.e10;
-
- TParticle *current = (TParticle*)(*gAlice->GetMCApp()->Particles())[gAlice->GetMCApp()->GetCurrentTrackNumber()];
+//history of Cerenkovs
+ if(gMC->TrackPid()==kCerenkov){
+ if( gMC->IsNewTrack() && gMC->CurrentVolID(copy)==gMC->VolId("RRAD")) fCounters(0)++;// 0- Ckovs produced in radiator
+ if(!gMC->IsTrackAlive() && gMC->CurrentVolID(copy)==gMC->VolId("RRAD")) fCounters(1)++;// 1- Ckovs absorbed in radiator
+ if(!gMC->IsTrackAlive() && gMC->CurrentVolID(copy)==gMC->VolId("RRWI")) fCounters(2)++;// 2- Ckovs absorbed in radiator window
+ if(!gMC->IsTrackAlive() && gMC->CurrentVolID(copy)==gMC->VolId("RICH")) fCounters(4)++;// 4- Ckovs absorbed in CH4
+ }
+
+//Treat photons
+ static TLorentzVector cerX4;
+ if((gMC->TrackPid()==kCerenkov||gMC->TrackPid()==kFeedback)&&gMC->CurrentVolID(copy)==gMC->VolId("RPC ")){//photon in PC
+ if(gMC->Edep()>0){//photon in PC +DE
+ if(IsLostByFresnel()){
+ if(gMC->TrackPid()==kCerenkov) fCounters(7)++;// 7- Ckovs reflected from CsI
+ gMC->StopTrack();
+ return;
+ }
+ gMC->TrackPosition(cerX4); gMC->CurrentVolOffID(2,iCurrentChamber);//RICH-RPPF-RPC
+
+ AddHit(iCurrentChamber,gAlice->GetMCApp()->GetCurrentTrackNumber(),cerX4.Vect(),cerX4.Vect());//HIT for PHOTON in conditions CF+CSI+DE
+ fCounters(8)++;//4- Ckovs converted to electron on CsI
+ GenerateFeedbacks(iCurrentChamber);
+ }//photon in PC and DE >0
+ }//photon in PC
+
+//Treat charged particles
+ static Float_t eloss;
+ static TLorentzVector mipInX4,mipOutX4;
+ if(gMC->TrackCharge() && gMC->CurrentVolID(copy)==gMC->VolId("RGAP")){//MIP in GAP
+ gMC->CurrentVolOffID(1,iCurrentChamber);//RICH-RGAP
+ if(gMC->IsTrackEntering()||gMC->IsNewTrack()) {//MIP in GAP entering or newly created
+ eloss=0;
+ gMC->TrackPosition(mipInX4);
+ }else if(gMC->IsTrackExiting()||gMC->IsTrackStop()||gMC->IsTrackDisappeared()){//MIP in GAP exiting or disappeared
+ eloss+=gMC->Edep();//take into account last step dEdX
+ gMC->TrackPosition(mipOutX4);
+ AddHit(iCurrentChamber,gAlice->GetMCApp()->GetCurrentTrackNumber(),mipInX4.Vect(),mipOutX4.Vect(),eloss);//HIT for MIP: MIP in GAP Exiting
+ GenerateFeedbacks(iCurrentChamber,eloss);//MIP+GAP+Exit
+ }else//MIP in GAP going inside
+ eloss += gMC->Edep();
+ }//MIP in GAP
+}//StepManager()
+//__________________________________________________________________________________________________
+Bool_t AliRICHv1::IsLostByFresnel()
+{
+// Calculate probability for the photon to be lost by Fresnel reflection.
+ TLorentzVector p4;
+ Double_t mom[3],localMom[3];
+ gMC->TrackMomentum(p4); mom[0]=p4(1); mom[1]=p4(2); mom[2]=p4(3);
+ localMom[0]=0; localMom[1]=0; localMom[2]=0;
+ gMC->Gmtod(mom,localMom,2);
+ Double_t localTc = localMom[0]*localMom[0]+localMom[2]*localMom[2];
+ Double_t localTheta = TMath::ATan2(TMath::Sqrt(localTc),localMom[1]);
+ Double_t cotheta = TMath::Abs(TMath::Cos(localTheta));
+ if(gMC->GetRandom()->Rndm() < Fresnel(p4.E()*1e9,cotheta,1)){
+ AliDebug(1,"Photon lost");
+ return kTRUE;
+ }else
+ return kFALSE;
+}//IsLostByFresnel()
+//__________________________________________________________________________________________________
+void AliRICHv1::GenerateFeedbacks(Int_t iChamber,Float_t eloss)
+{
+// Generate FeedBack photons for the current particle. To be invoked from StepManager().
+// eloss=0 means photon so only pulse height distribution is to be analysed. This one is done in AliRICHParam::TotQdc()
+
+ TLorentzVector x4;
+ gMC->TrackPosition(x4);
+ TVector2 x2=C(iChamber)->Mrs2Pc(x4);//hit position on photocathode plane
+ TVector2 xspe=x2;
+ Int_t sector=P()->Loc2Sec(xspe); if(sector==kBad) return; //hit in dead zone, nothing to produce
+ Int_t iTotQdc=P()->TotQdc(x2,eloss);
+ Int_t iNphotons=gMC->GetRandom()->Poisson(P()->C(iChamber)->AlphaFeedback(sector)*iTotQdc);
+ AliDebug(1,Form("N photons=%i",iNphotons));
+ Int_t j;
+ Float_t cthf, phif, enfp = 0, sthf, e1[3], e2[3], e3[3], vmod, uswop,dir[3], phi,pol[3], mom[4];
+//Generate photons
+ for(Int_t i=0;i<iNphotons;i++){//feedbacks loop
+ Double_t ranf[2];
+ gMC->GetRandom()->RndmArray(2,ranf); //Sample direction
+ cthf=ranf[0]*2-1.0;
+ if(cthf<0) continue;
+ sthf = TMath::Sqrt((1 - cthf) * (1 + cthf));
+ phif = ranf[1] * 2 * TMath::Pi();
+
+ if(Double_t randomNumber=gMC->GetRandom()->Rndm()<=0.57)
+ enfp = 7.5e-9;
+ else if(randomNumber<=0.7)
+ enfp = 6.4e-9;
+ else
+ enfp = 7.9e-9;
+
+ dir[0] = sthf * TMath::Sin(phif); dir[1] = cthf; dir[2] = sthf * TMath::Cos(phif);
+ gMC->Gdtom(dir, mom, 2);
+ mom[0]*=enfp; mom[1]*=enfp; mom[2]*=enfp;
+ mom[3] = TMath::Sqrt(mom[0]*mom[0]+mom[1]*mom[1]+mom[2]*mom[2]);
-
- id=gMC->CurrentVolID(copy); iCurrentChamber=copy;
- Float_t cherenkovLoss=0;
+ // Polarisation
+ e1[0]= 0; e1[1]=-dir[2]; e1[2]= dir[1];
+ e2[0]=-dir[1]; e2[1]= dir[0]; e2[2]= 0;
+ e3[0]= dir[1]; e3[1]= 0; e3[2]=-dir[0];
- gMC->TrackPosition(x4); pos[0]=x4(0); pos[1]=x4(1); pos[2]=x4(2);
- ckovData[1] = pos[0]; ckovData[2] = pos[1]; ckovData[3] = pos[2];
- ckovData[6] = 0; // dummy track length
+ vmod=0;
+ for(j=0;j<3;j++) vmod+=e1[j]*e1[j];
+ if (!vmod) for(j=0;j<3;j++) {
+ uswop=e1[j];
+ e1[j]=e3[j];
+ e3[j]=uswop;
+ }
+ vmod=0;
+ for(j=0;j<3;j++) vmod+=e2[j]*e2[j];
+ if (!vmod) for(j=0;j<3;j++) {
+ uswop=e2[j];
+ e2[j]=e3[j];
+ e3[j]=uswop;
+ }
- /********************Store production parameters for Cerenkov photons************************/
-
- if(gMC->TrackPid()==kCerenkov){//C
- Float_t ckovEnergy = current->Energy();
- if(ckovEnergy > 5.6e-09 && ckovEnergy < 7.8e-09 ){//C+E
- if(gMC->IsTrackEntering()){//C+E+enter
- if(gMC->VolId("FRE1")==gMC->CurrentVolID(copy)||gMC->VolId("FRE2")==gMC->CurrentVolID(copy)){//C+E+enter+FRE
- if(gMC->IsNewTrack()){//C+E+enter+FRE+new
- Int_t mother=current->GetFirstMother();
- ckovData[10]=mother;
- ckovData[11]=gAlice->GetMCApp()->GetCurrentTrackNumber();
- ckovData[12]=1; //Media where photon was produced 1->Freon, 2->Quarz
- fCkovNumber++;
- fFreonProd=1;
- }//C+E+enter+FRE+new
- }//C+E+enter+FRE
- if(gMC->IsNewTrack()&&gMC->VolId("QUAR")==gMC->CurrentVolID(copy)) ckovData[12]=2;
- }//C+E+enter
- if(ckovData[12]==1){//C+E+produced in Freon
- if(gMC->IsTrackEntering()){ //is track entering?
- if (gMC->VolId("META")==gMC->CurrentVolID(copy)){ //is it in gap?
- gMC->TrackMomentum(p4); mom[0]=p4(0); mom[1]=p4(1); mom[2]=p4(2); mom[3]=p4(3);
-
- gMC->Gmtod(mom,localMom,2);
- Float_t cophi = TMath::Cos(TMath::ATan2(localMom[0], localMom[1]));
- Float_t t = (1. - .025 / cophi) * (1. - .05 / cophi);
- /**************** Photons lost in second grid have to be calculated by hand************/
- gMC->GetRandom()->RndmArray(1,ranf);
- if (ranf[0] > t) {
- gMC->StopTrack();
- ckovData[13] = 5;
- //AddCerenkov(gAlice->GetCurrentTrackNumber(),vol,ckovData);
- }
- /**********************************************************************************/
- } //gap
-
- if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy)){ //is it in csi?
-
- gMC->TrackMomentum(p4); mom[0]=p4(0); mom[1]=p4(1); mom[2]=p4(2); mom[3]=p4(3);
-
- gMC->Gmtod(mom,localMom,2);
- /********* Photons lost by Fresnel reflection have to be calculated by hand********/
- /***********************Cerenkov phtons (always polarised)*************************/
- Double_t localTc = localMom[0]*localMom[0]+localMom[2]*localMom[2];
- Double_t localRt = TMath::Sqrt(localTc);
- localTheta = Float_t(TMath::ATan2(localRt,Double_t(localMom[1])));
- Double_t cotheta = TMath::Abs(cos(localTheta));
- Float_t t = Fresnel(ckovEnergy*1e9,cotheta,1);
- gMC->GetRandom()->RndmArray(1,ranf);
- if (ranf[0] < t) {
- gMC->StopTrack();
- ckovData[13] = 6;
- //AddCerenkov(gAlice->GetCurrentTrackNumber(),vol,ckovData);
-
- //printf("Added One (2)!\n");
- //printf("Lost by Fresnel\n");
- }
- /**********************************************************************************/
- }
- } //track entering?
- /********************Evaluation of losses************************/
- /******************still in the old fashion**********************/
- TArrayI procs;
- Int_t i1 = gMC->StepProcesses(procs); //number of physics mechanisms acting on the particle
- for (Int_t i = 0; i < i1; ++i) {
- // Reflection loss
- if (procs[i] == kPLightReflection) { //was it reflected
- ckovData[13]=10;
- if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
- ckovData[13]=1;
- if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
- ckovData[13]=2;
- } //reflection question
-
- // Absorption loss
- else if (procs[i] == kPLightAbsorption) { //was it absorbed?
- //printf("Got in absorption\n");
- ckovData[13]=20;
- if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
- ckovData[13]=11;
- if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
- ckovData[13]=12;
- if (gMC->CurrentVolID(copy) == gMC->VolId("META"))
- ckovData[13]=13;
- if (gMC->CurrentVolID(copy) == gMC->VolId("GAP "))
- ckovData[13]=13;
-
- if (gMC->CurrentVolID(copy) == gMC->VolId("SRIC"))
- ckovData[13]=15;
-
- // CsI inefficiency
- if (gMC->CurrentVolID(copy) == gMC->VolId("CSI ")) {
- ckovData[13]=16;
- }
- gMC->StopTrack();
- //AddCerenkov(gAlice->GetCurrentTrackNumber(),vol,ckovData);
- } //absorption question
-
-
- // Photon goes out of tracking scope
- else if (procs[i] == kPStop) { //is it below energy treshold?
- ckovData[13]=21;
- gMC->StopTrack();
- //AddCerenkov(gAlice->GetCurrentTrackNumber(),vol,ckovData);
- } // energy treshold question
- } //number of mechanisms cycle
- /**********************End of evaluation************************/
- }//C+E+produced in Freon
- }//C+E
- }//C
-//*************************************End of Production Parameters Storing*********************
+ vmod=0; for(j=0;j<3;j++) vmod+=e1[j]*e1[j]; vmod=TMath::Sqrt(1/vmod); for(j=0;j<3;j++) e1[j]*=vmod;
+ vmod=0; for(j=0;j<3;j++) vmod+=e2[j]*e2[j]; vmod=TMath::Sqrt(1/vmod); for(j=0;j<3;j++) e2[j]*=vmod;
- if(gMC->TrackPid()==kCerenkov||gMC->TrackPid()==kFeedback){//CF
- if(gMC->VolId("CSI ")==gMC->CurrentVolID(copy)){//CF+CSI
- if(gMC->Edep()>0.){//CF+CSI+DE
- gMC->TrackPosition(x4); pos[0]=x4(0); pos[1]=x4(1); pos[2]=x4(2);
- gMC->TrackMomentum(p4); mom[0]=p4(0); mom[1]=p4(1); mom[2]=p4(2); mom[3]=p4(3);
-
- Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
- Double_t rt = TMath::Sqrt(tc);
- theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
- phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
-
- gMC->CurrentVolOffID(2,copy); vol[0]=copy; iCurrentChamber=vol[0];
-
- gMC->Gmtod(pos,localPos,1); gMC->Gmtod(mom,localMom,2);
-
- Param()->SigGenInit(localPos[0],localPos[2]);
- ckovData[0]=gMC->TrackPid();
- ckovData[1]=pos[0]; ckovData[2]=pos[1]; ckovData[3]=pos[2];
- ckovData[4]=theta; ckovData[5]=phi; //theta-phi angles of incidence
- ckovData[8]=(Float_t) fNsdigits; // first sdigit
- ckovData[9]=-1; // last pad hit
- ckovData[13]=4; // photon was detected
- ckovData[14]=mom[0]; ckovData[15]=mom[1]; ckovData[16]=mom[2];
-
- destep = gMC->Edep();
- gMC->SetMaxStep(kBig);
- cherenkovLoss += destep;
- ckovData[7]=cherenkovLoss;
-
- GenerateFeedbacks(iCurrentChamber,cherenkovLoss);//CF+CSI+DE
-
- if (fNsdigits > (Int_t)ckovData[8]) {
- ckovData[8]= ckovData[8]+1;
- ckovData[9]= (Float_t) fNsdigits;
- }
-
- ckovData[17] = nPads;
- AliRICHhit *mipHit = (AliRICHhit*) (fHits->UncheckedAt(0));
- if(mipHit){
- mom[0] = current->Px(); mom[1] = current->Py(); mom[2] = current->Pz();
- Float_t mipPx = mipHit->MomX(); Float_t mipPy = mipHit->MomY(); Float_t mipPz = mipHit->MomZ();
-
- Float_t r = mom[0]*mom[0] + mom[1]*mom[1] + mom[2]*mom[2];
- Float_t rt = TMath::Sqrt(r);
- Float_t mipR = mipPx*mipPx + mipPy*mipPy + mipPz*mipPz;
- Float_t mipRt = TMath::Sqrt(mipR);
- if((rt*mipRt) > 0)
- coscerenkov = (mom[0]*mipPx + mom[1]*mipPy + mom[2]*mipPz)/(rt*mipRt);
- else
- coscerenkov = 0;
- ckovData[18]=TMath::ACos(coscerenkov);//Cerenkov angle
- }
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,ckovData);//PHOTON HIT CF+CSI+DE
- //AddCerenkov(gAlice->GetCurrentTrackNumber(),vol,ckovData);
- }//CF+CSI+DE
- }//CF+CSI
- }/*CF*/else if(gMC->TrackCharge()){//MIP
- if(gMC->VolId("FRE1")==gMC->CurrentVolID(copy)||gMC->VolId("FRE2")==gMC->CurrentVolID(copy)){//MIP+FRE
- gMC->TrackMomentum(p4); mom[0]=p4(0); mom[1]=p4(1); mom[2]=p4(2); mom[3]=p4(3);
- hits[19]=mom[0]; hits [20] = mom[1]; hits [21] = mom[2]; fFreonProd=1;
- }//MIP+FRE
- if(gMC->VolId("GAP ")==gMC->CurrentVolID(copy)){//MIP+GAP
- gMC->CurrentVolOffID(3,copy); vol[0]=copy; iCurrentChamber=vol[0];
- gMC->TrackPosition(x4); pos[0]=x4(0); pos[1]=x4(1); pos[2]=x4(2);
- gMC->TrackMomentum(p4); mom[0]=p4(0); mom[1]=p4(1); mom[2]=p4(2); mom[3]=p4(3);
- gMC->Gmtod(pos,localPos,1); gMC->Gmtod(mom,localMom,2);
- ipart =gMC->TrackPid();
- destep = gMC->Edep();step = gMC->TrackStep();// momentum loss and steplength in last step
- if(gMC->IsTrackEntering()){//MIP+GAP+Enter record hit when mip enters ...
- Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
- Double_t rt = TMath::Sqrt(tc);
- theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
- phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
- Double_t localTc = localMom[0]*localMom[0]+localMom[2]*localMom[2];
- Double_t localRt = TMath::Sqrt(localTc);
- localTheta = Float_t(TMath::ATan2(localRt,Double_t(localMom[1])))*kRaddeg;
- localPhi = Float_t(TMath::ATan2(Double_t(localMom[2]),Double_t(localMom[0])))*kRaddeg;
- hits[0] = Float_t(ipart); // particle type
- hits[1] = localPos[0]; hits[2] = localPos[1]; hits[3] = localPos[2];
- hits[4] = localTheta; hits[5] = localPhi; // theta-phi angles of incidence
- hits[8] = (Float_t) fNsdigits; // first sdigit
- hits[9] = -1; // last pad hit
- hits[13] = fFreonProd; // did id hit the freon?
- hits[14] = mom[0]; hits[15] = mom[1]; hits[16] = mom[2];
- hits[18] = 0; // dummy cerenkov angle
- tlength = 0; eloss = 0; fFreonProd = 0;
- C(iCurrentChamber)->LocaltoGlobal(localPos,hits+1);
-
- Param()->SigGenInit(localPos[0], localPos[2]);
- }/*MIP+GAP+Enter*/else if(gMC->IsTrackExiting()||gMC->IsTrackStop()||gMC->IsTrackDisappeared()){//MIP+GAP+Exit
- gMC->SetMaxStep(kBig);
- eloss += destep;
- tlength += step;
- if (eloss > 0) {
- if(gMC->TrackPid() == kNeutron) printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
- GenerateFeedbacks(iCurrentChamber,eloss);//MIP+GAP+Exit
- hits[17] = nPads;
- }
- hits[6]=tlength; hits[7]=eloss;
- if(fNsdigits > (Int_t)hits[8]) {
- hits[8]= hits[8]+1;
- hits[9]= (Float_t) fNsdigits;
- }
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);//MIP HIT MIP+GAP+Exit
- eloss = 0;
- }/*MIP+GAP+Exit*/else if(Param()->SigGenCond(localPos[0], localPos[2])){//MIP+GAP+Spec
- Param()->SigGenInit(localPos[0], localPos[2]);
- if(eloss>0){
- if(gMC->TrackPid() == kNeutron) printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
- GenerateFeedbacks(iCurrentChamber,eloss);//MIP+GAP+Spec
- hits[17] = nPads;
- }
-
- eloss = destep; tlength += step ;
- }/*MIP+GAP+Spec*/else{//MIP+GAP+nothing special
- eloss += destep;
- tlength += step ;
- }//MIP+GAP+nothing special
- }//MIP+GAP
- }//MIP
-}//void AliRICHv1::StepManager()
+ phi = gMC->GetRandom()->Rndm()* 2 * TMath::Pi();
+ for(j=0;j<3;j++) pol[j]=e1[j]*TMath::Sin(phi)+e2[j]*TMath::Cos(phi);
+ gMC->Gdtom(pol, pol, 2);
+ Int_t outputNtracksStored;
+ gAlice->GetMCApp()->PushTrack(1, //do not transport
+ gAlice->GetMCApp()->GetCurrentTrackNumber(),//parent track
+ kFeedback, //PID
+ mom[0],mom[1],mom[2],mom[3], //track momentum
+ x4.X(),x4.Y(),x4.Z(),x4.T(), //track origin
+ pol[0],pol[1],pol[2], //polarization
+ kPFeedBackPhoton,
+ outputNtracksStored,
+ 1.0);
+ }//feedbacks loop
+ AliDebug(1,"Stop.");
+}//GenerateFeedbacks()
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff