-/**************************************************************************
- * 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. *
+// **************************************************************************
-/*
- $Log$
- Revision 1.9 2000/05/31 08:19:38 jbarbosa
- Fixed bug in StepManager
-
- Revision 1.8 2000/05/26 17:30:08 jbarbosa
- Cerenkov angle now stored within cerenkov data structure.
-
- Revision 1.7 2000/05/18 10:31:36 jbarbosa
- Fixed positioning of spacers inside freon.
- Fixed positioning of proximity gap
- inside methane.
- Fixed cut on neutral particles in the StepManager.
-
- Revision 1.6 2000/04/28 11:51:58 morsch
- Dimensions of arrays hits and Ckov_data corrected.
-
- Revision 1.5 2000/04/19 13:28:46 morsch
- Major changes in geometry (parametrised), materials (updated) and
- step manager (diagnostics) (JB, AM)
-
-*/
-
-
-
-//////////////////////////////////////////////////////////
-// Manager and hits classes for set: RICH full version //
-//////////////////////////////////////////////////////////
-
-#include <TTUBE.h>
-#include <TNode.h>
-#include <TRandom.h>
#include "AliRICHv1.h"
-#include "AliRun.h"
-#include "AliMC.h"
-#include "iostream.h"
-#include "AliCallf77.h"
-#include "AliConst.h"
-#include "AliPDG.h"
-#include "TGeant3.h"
+#include "AliRICHParam.h"
+#include "AliRICHChamber.h"
+#include <TParticle.h>
+#include <TRandom.h>
+#include <TVirtualMC.h>
+#include <TPDGCode.h>
-ClassImp(AliRICHv1)
-
-//___________________________________________
-AliRICHv1::AliRICHv1() : AliRICHv0()
-{
- //fChambers = 0;
-}
+#include <AliConst.h>
+#include <AliPDG.h>
+#include <AliRun.h>
+#include <AliMC.h>
-//___________________________________________
-AliRICHv1::AliRICHv1(const char *name, const char *title)
- : AliRICHv0(name,title)
+ClassImp(AliRICHv1)
+//__________________________________________________________________________________________________
+void AliRICHv1::StepManager()
{
- fCkov_number=0;
- fFreon_prod=0;
-
- fChambers = new TObjArray(7);
- for (Int_t i=0; i<7; i++) {
-
- (*fChambers)[i] = new AliRICHChamber();
+// 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 idRRAD = gMC->VolId("RRAD");
+ static Int_t idRRWI = gMC->VolId("RRWI");
+ static Int_t idRICH = gMC->VolId("RICH");
+ static Int_t idRPC = gMC->VolId("RPC ");
+ static Int_t idRGAP = gMC->VolId("RGAP");
+//history of Cerenkovs
+ if(gMC->TrackPid()==kCerenkov){
+ if( gMC->IsNewTrack() && gMC->CurrentVolID(copy)==idRRAD) fCounters(0)++;// 0- Ckovs produced in radiator
+ if(!gMC->IsTrackAlive() && gMC->CurrentVolID(copy)==idRRAD) fCounters(1)++;// 1- Ckovs absorbed in radiator
+ if(!gMC->IsTrackAlive() && gMC->CurrentVolID(copy)==idRRWI) fCounters(2)++;// 2- Ckovs absorbed in radiator window
+ if(!gMC->IsTrackAlive() && gMC->CurrentVolID(copy)==idRICH) fCounters(4)++;// 4- Ckovs absorbed in CH4
+ }
+
+//Treat photons
+ static TLorentzVector cerX4;
+ if((gMC->TrackPid()==kCerenkov||gMC->TrackPid()==kFeedback)&&gMC->CurrentVolID(copy)==idRPC){//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
- }
-}
-
-
-//___________________________________________
-void AliRICHv1::StepManager()
+ 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)==idRGAP){//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()
{
- Int_t copy, id;
- static Int_t idvol;
- static Int_t vol[2];
- Int_t ipart;
- static Float_t hits[18];
- static Float_t Ckov_data[19];
- TLorentzVector Position;
- TLorentzVector Momentum;
- Float_t pos[3];
- Float_t mom[4];
- Float_t Localpos[3];
- Float_t Localmom[4];
- Float_t Localtheta,Localphi;
- Float_t theta,phi;
- Float_t destep, step;
- Float_t ranf[2];
- Int_t NPads;
- Float_t coscerenkov;
- static Float_t eloss, xhit, yhit, tlength;
- const Float_t big=1.e10;
-
- TClonesArray &lhits = *fHits;
- TGeant3 *geant3 = (TGeant3*) gMC;
- TParticle *current = (TParticle*)(*gAlice->Particles())[gAlice->CurrentTrack()];
-
- //if (current->Energy()>1)
- //{
-
- // Only gas gap inside chamber
- // Tag chambers and record hits when track enters
-
- idvol=-1;
- id=gMC->CurrentVolID(copy);
- Float_t cherenkov_loss=0;
- //gAlice->KeepTrack(gAlice->CurrentTrack());
+// 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();
- gMC->TrackPosition(Position);
- pos[0]=Position(0);
- pos[1]=Position(1);
- pos[2]=Position(2);
- Ckov_data[1] = pos[0]; // X-position for hit
- Ckov_data[2] = pos[1]; // Y-position for hit
- Ckov_data[3] = pos[2]; // Z-position for hit
- //Ckov_data[11] = gAlice->CurrentTrack();
-
- //AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
+ 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;
- /********************Store production parameters for Cerenkov photons************************/
-//is it a Cerenkov photon?
- if (gMC->TrackPid() == 50000050) {
- //if (gMC->VolId("GAP ")==gMC->CurrentVolID(copy))
- //{
- Float_t Ckov_energy = current->Energy();
- //energy interval for tracking
- if (Ckov_energy > 5.6e-09 && Ckov_energy < 7.8e-09 )
- //if (Ckov_energy > 0)
- {
- if (gMC->IsTrackEntering()){ //is track entering?
- if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
- { //is it in freo?
- if (geant3->Gctrak()->nstep<1){ //is it the first step?
- Int_t mother = current->GetFirstMother();
-
- //printf("Second Mother:%d\n",current->GetSecondMother());
-
- Ckov_data[10] = mother;
- Ckov_data[11] = gAlice->CurrentTrack();
- Ckov_data[12] = 1; //Media where photon was produced 1->Freon, 2->Quarz
- fCkov_number++;
- fFreon_prod=1;
- //printf("Index: %d\n",fCkov_number);
- } //first step question
- } //freo question
-
- if (geant3->Gctrak()->nstep<1){ //is it first step?
- if (gMC->VolId("QUAR")==gMC->CurrentVolID(copy)) //is it in quarz?
- {
- Ckov_data[12] = 2;
- } //quarz question
- } //first step question
-
- //printf("Before %d\n",fFreon_prod);
- } //track entering question
-
- if (Ckov_data[12] == 1) //was it produced in Freon?
- //if (fFreon_prod == 1)
- {
- if (gMC->IsTrackEntering()){ //is track entering?
- //printf("Got in");
- if (gMC->VolId("META")==gMC->CurrentVolID(copy)) //is it in gap?
- {
- //printf("Got in\n");
- gMC->TrackMomentum(Momentum);
- mom[0]=Momentum(0);
- mom[1]=Momentum(1);
- mom[2]=Momentum(2);
- mom[3]=Momentum(3);
- // Z-position for hit
-
-
- /**************** Photons lost in second grid have to be calculated by hand************/
-
- Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
- Float_t t = (1. - .025 / cophi) * (1. - .05 / cophi);
- gMC->Rndm(ranf, 1);
- //printf("grid calculation:%f\n",t);
- if (ranf[0] > t) {
- //geant3->StopTrack();
- Ckov_data[13] = 5;
- AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
- //printf("Lost one in grid\n");
- }
- /**********************************************************************************/
- } //gap
-
- if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy)) //is it in csi?
- {
- gMC->TrackMomentum(Momentum);
- mom[0]=Momentum(0);
- mom[1]=Momentum(1);
- mom[2]=Momentum(2);
- mom[3]=Momentum(3);
-
- /********* Photons lost by Fresnel reflection have to be calculated by hand********/
- /***********************Cerenkov phtons (always polarised)*************************/
-
- Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
- Float_t t = Fresnel(Ckov_energy*1e9,cophi,1);
- gMC->Rndm(ranf, 1);
- if (ranf[0] < t) {
- //geant3->StopTrack();
- Ckov_data[13] = 6;
- AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
- //printf("Lost by Fresnel\n");
- }
- /**********************************************************************************/
- }
- } //track entering?
-
-
- /********************Evaluation of losses************************/
- /******************still in the old fashion**********************/
-
- Int_t i1 = geant3->Gctrak()->nmec; //number of physics mechanisms acting on the particle
- for (Int_t i = 0; i < i1; ++i) {
- // Reflection loss
- if (geant3->Gctrak()->lmec[i] == 106) { //was it reflected
- Ckov_data[13]=10;
- if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
- Ckov_data[13]=1;
- if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
- Ckov_data[13]=2;
- //geant3->StopTrack();
- AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
- } //reflection question
-
-
- // Absorption loss
- else if (geant3->Gctrak()->lmec[i] == 101) { //was it absorbed?
- Ckov_data[13]=20;
- if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
- Ckov_data[13]=11;
- if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
- Ckov_data[13]=12;
- if (gMC->CurrentVolID(copy) == gMC->VolId("META"))
- Ckov_data[13]=13;
- if (gMC->CurrentVolID(copy) == gMC->VolId("GAP "))
- Ckov_data[13]=13;
-
- if (gMC->CurrentVolID(copy) == gMC->VolId("SRIC"))
- Ckov_data[13]=15;
-
- // CsI inefficiency
- if (gMC->CurrentVolID(copy) == gMC->VolId("CSI ")) {
- Ckov_data[13]=16;
- }
- //geant3->StopTrack();
- AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
- //printf("Added cerenkov %d\n",fCkov_number);
- } //absorption question
-
-
- // Photon goes out of tracking scope
- else if (geant3->Gctrak()->lmec[i] == 30) { //is it below energy treshold?
- Ckov_data[13]=21;
- //geant3->StopTrack();
- AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
- } // energy treshold question
- } //number of mechanisms cycle
- /**********************End of evaluation************************/
- } //freon production question
- } //energy interval question
- //}//inside the proximity gap question
- } //cerenkov photon question
-
- /**************************************End of Production Parameters Storing*********************/
-
+ 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]);
- /*******************************Treat photons that hit the CsI (Ckovs and Feedbacks)************/
+ // 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];
- if (gMC->TrackPid() == 50000050 || gMC->TrackPid() == 50000051) {
- //printf("Cerenkov\n");
- if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy))
- {
-
- if (gMC->Edep() > 0.){
- gMC->TrackPosition(Position);
- gMC->TrackMomentum(Momentum);
- pos[0]=Position(0);
- pos[1]=Position(1);
- pos[2]=Position(2);
- mom[0]=Momentum(0);
- mom[1]=Momentum(1);
- mom[2]=Momentum(2);
- mom[3]=Momentum(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->Gmtod(pos,Localpos,1);
- gMC->Gmtod(mom,Localmom,2);
-
- gMC->CurrentVolOffID(2,copy);
- vol[0]=copy;
- idvol=vol[0]-1;
-
- //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
- //->Sector(Localpos[0], Localpos[2]);
- //printf("Sector:%d\n",sector);
-
- /*if (gMC->TrackPid() == 50000051){
- fFeedbacks++;
- printf("Feedbacks:%d\n",fFeedbacks);
- }*/
-
- ((AliRICHChamber*) (*fChambers)[idvol])
- ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
- if(idvol<7) {
- Ckov_data[0] = gMC->TrackPid(); // particle type
- Ckov_data[1] = pos[0]; // X-position for hit
- Ckov_data[2] = pos[1]; // Y-position for hit
- Ckov_data[3] = pos[2]; // Z-position for hit
- Ckov_data[4] = theta; // theta angle of incidence
- Ckov_data[5] = phi; // phi angle of incidence
- Ckov_data[8] = (Float_t) fNPadHits; // first padhit
- Ckov_data[9] = -1; // last pad hit
- Ckov_data[13] = 4; // photon was detected
- Ckov_data[14] = mom[0];
- Ckov_data[15] = mom[1];
- Ckov_data[16] = mom[2];
-
- destep = gMC->Edep();
- gMC->SetMaxStep(big);
- cherenkov_loss += destep;
- Ckov_data[7]=cherenkov_loss;
-
- NPads = MakePadHits(Localpos[0],Localpos[2],cherenkov_loss,idvol,cerenkov);
- if (fNPadHits > (Int_t)Ckov_data[8]) {
- Ckov_data[8]= Ckov_data[8]+1;
- Ckov_data[9]= (Float_t) fNPadHits;
- }
-
- Ckov_data[17] = NPads;
- //printf("Npads:%d",NPads);
-
- //TClonesArray *Hits = RICH->Hits();
- AliRICHHit *mipHit = (AliRICHHit*) (fHits->UncheckedAt(0));
- if (mipHit)
- {
- mom[0] = current->Px();
- mom[1] = current->Py();
- mom[2] = current->Pz();
- Float_t Mip_px = mipHit->fMomX;
- Float_t Mip_py = mipHit->fMomY;
- Float_t Mip_pz = mipHit->fMomZ;
-
- Float_t r = mom[0]*mom[0] + mom[1]*mom[1] + mom[2]*mom[2];
- Float_t rt = TMath::Sqrt(r);
- Float_t Mip_r = Mip_px*Mip_px + Mip_py*Mip_py + Mip_pz*Mip_pz;
- Float_t Mip_rt = TMath::Sqrt(Mip_r);
- if ((rt*Mip_rt) > 0)
- {
- coscerenkov = (mom[0]*Mip_px + mom[1]*Mip_py + mom[2]*Mip_pz)/(rt*Mip_rt);
- }
- else
- {
- coscerenkov = 0;
- }
- Float_t cherenkov = TMath::ACos(coscerenkov);
- Ckov_data[18]=cherenkov;
- }
- //if (sector != -1)
- //{
- AddHit(gAlice->CurrentTrack(),vol,Ckov_data);
- AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
- //}
- }
- }
- }
+ 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;
}
- /***********************************************End of photon hits*********************************************/
+ 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;
-
- /**********************************************Charged particles treatment*************************************/
-
- else if (gMC->TrackCharge())
- //else if (1 == 1)
- {
-//If MIP
- /*if (gMC->IsTrackEntering())
- {
- hits[13]=20;//is track entering?
- }*/
- if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
- {
- fFreon_prod=1;
- }
-
- if (gMC->VolId("GAP ")== gMC->CurrentVolID(copy)) {
-// Get current particle id (ipart), track position (pos) and momentum (mom)
-
- gMC->CurrentVolOffID(3,copy);
- vol[0]=copy;
- idvol=vol[0]-1;
-
- //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
- //->Sector(Localpos[0], Localpos[2]);
- //printf("Sector:%d\n",sector);
-
- gMC->TrackPosition(Position);
- gMC->TrackMomentum(Momentum);
- pos[0]=Position(0);
- pos[1]=Position(1);
- pos[2]=Position(2);
- mom[0]=Momentum(0);
- mom[1]=Momentum(1);
- mom[2]=Momentum(2);
- mom[3]=Momentum(3);
- gMC->Gmtod(pos,Localpos,1);
- gMC->Gmtod(mom,Localmom,2);
-
- ipart = gMC->TrackPid();
- //
- // momentum loss and steplength in last step
- destep = gMC->Edep();
- step = gMC->TrackStep();
-
- //
- // record hits when track enters ...
- if( gMC->IsTrackEntering()) {
-// gMC->SetMaxStep(fMaxStepGas);
- 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]; // X-position for hit
- hits[2] = Localpos[1]; // Y-position for hit
- hits[3] = Localpos[2]; // Z-position for hit
- hits[4] = Localtheta; // theta angle of incidence
- hits[5] = Localphi; // phi angle of incidence
- hits[8] = (Float_t) fNPadHits; // first padhit
- hits[9] = -1; // last pad hit
- hits[13] = fFreon_prod; // did id hit the freon?
- hits[14] = mom[0];
- hits[15] = mom[1];
- hits[16] = mom[2];
-
- tlength = 0;
- eloss = 0;
- fFreon_prod = 0;
-
- Chamber(idvol).LocaltoGlobal(Localpos,hits+1);
-
-
- //To make chamber coordinates x-y had to pass LocalPos[0], LocalPos[2]
- xhit = Localpos[0];
- yhit = Localpos[2];
- // Only if not trigger chamber
- if(idvol<7) {
- //
- // Initialize hit position (cursor) in the segmentation model
- ((AliRICHChamber*) (*fChambers)[idvol])
- ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
- }
- }
-
- //
- // Calculate the charge induced on a pad (disintegration) in case
- //
- // Mip left chamber ...
- if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
- gMC->SetMaxStep(big);
- eloss += destep;
- tlength += step;
-
-
- // Only if not trigger chamber
- if(idvol<7) {
- if (eloss > 0)
- {
- if(gMC->TrackPid() == kNeutron)
- printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
- NPads = MakePadHits(xhit,yhit,eloss,idvol,mip);
- hits[17] = NPads;
- //printf("Npads:%d",NPads);
- }
- }
-
- hits[6]=tlength;
- hits[7]=eloss;
- if (fNPadHits > (Int_t)hits[8]) {
- hits[8]= hits[8]+1;
- hits[9]= (Float_t) fNPadHits;
- }
-
- //if(sector !=-1)
- new(lhits[fNhits++]) AliRICHHit(fIshunt,gAlice->CurrentTrack(),vol,hits);
- eloss = 0;
- //
- // Check additional signal generation conditions
- // defined by the segmentation
- // model (boundary crossing conditions)
- } else if
- (((AliRICHChamber*) (*fChambers)[idvol])
- ->SigGenCond(Localpos[0], Localpos[2], Localpos[1]))
- {
- ((AliRICHChamber*) (*fChambers)[idvol])
- ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
- if (eloss > 0)
- {
- if(gMC->TrackPid() == kNeutron)
- printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
- NPads = MakePadHits(xhit,yhit,eloss,idvol,mip);
- hits[17] = NPads;
- //printf("Npads:%d",NPads);
- }
- xhit = Localpos[0];
- yhit = Localpos[2];
- eloss = destep;
- tlength += step ;
- //
- // nothing special happened, add up energy loss
- } else {
- eloss += destep;
- tlength += step ;
- }
- }
- }
- /*************************************************End of MIP treatment**************************************/
- //}
-}
+ 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