-/**************************************************************************
- * 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 1.7 2000/10/03 21:44:09 morsch
- Use AliSegmentation and AliHit abstract base classes.
-
- Revision 1.6 2000/07/10 15:28:39 fca
- Correction of the inheritance scheme
-
- Revision 1.5 2000/06/30 16:38:51 dibari
- Removed setters.
-
- Revision 1.4 2000/06/13 13:13:40 jbarbosa
- Correcting previous correction...
-
- Revision 1.3 2000/06/13 13:06:38 jbarbosa
- Fixed compiling error for HP (multiple declaration)
-
- Revision 1.2 2000/06/12 15:36:16 jbarbosa
- Cleaned up version.
-
- Revision 1.1 2000/06/09 15:00:31 jbarbosa
- New full version. All parameters configurable.
-
- 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 <TParticle.h>
#include "AliRICHv1.h"
-#include "AliRICHHit.h"
-#include "AliSegmentation.h"
-#include "AliRICHResponse.h"
-#include "AliRICHSegmentationV0.h"
-#include "AliRICHResponseV0.h"
-#include "AliRICHGeometry.h"
-#include "AliRun.h"
-#include "AliMC.h"
-#include "iostream.h"
-#include "AliCallf77.h"
-#include "AliConst.h"
-#include "AliPDG.h"
-#include "TGeant3.h"
-
-ClassImp(AliRICHv1)
-
-//___________________________________________
-AliRICHv1::AliRICHv1()
-{
-
-// Default constructor fo AliRICHvv1 (full version)
+#include "AliRICHParam.h"
+#include "AliRICHChamber.h"
+#include <TParticle.h>
+#include <TRandom.h>
+#include <TVirtualMC.h>
+#include <TPDGCode.h>
- //fChambers = 0;
-}
+#include <AliConst.h>
+#include <AliPDG.h>
+#include <AliRun.h>
+#include <AliMC.h>
-//___________________________________________
-AliRICHv1::AliRICHv1(const char *name, const char *title)
- : AliRICH(name,title)
+ClassImp(AliRICHv1)
+//__________________________________________________________________________________________________
+void AliRICHv1::StepManager()
{
-
-// Full version of RICH with hits and diagnostics
-
- // Version 0
-// Default Segmentation, no hits
- AliRICHSegmentationV0* segmentationV0 = new AliRICHSegmentationV0;
-//
-// Segmentation parameters
- segmentationV0->SetPadSize(0.84,0.80);
- segmentationV0->SetDAnod(0.84/2);
-//
-// Geometry parameters
- AliRICHGeometry* geometry = new AliRICHGeometry;
- geometry->SetGapThickness(8);
- geometry->SetProximityGapThickness(.4);
- geometry->SetQuartzLength(133);
- geometry->SetQuartzWidth(127.9);
- geometry->SetQuartzThickness(.5);
- geometry->SetOuterFreonLength(133);
- geometry->SetOuterFreonWidth(41.3);
- geometry->SetInnerFreonLength(133);
- geometry->SetInnerFreonWidth(41.3);
- geometry->SetFreonThickness(1.5);
-//
-// Response parameters
- AliRICHResponseV0* responseV0 = new AliRICHResponseV0;
- responseV0->SetSigmaIntegration(5.);
- responseV0->SetChargeSlope(27.);
- responseV0->SetChargeSpread(0.18, 0.18);
- responseV0->SetMaxAdc(4096);
- responseV0->SetAlphaFeedback(0.036);
- responseV0->SetEIonisation(26.e-9);
- responseV0->SetSqrtKx3(0.77459667);
- responseV0->SetKx2(0.962);
- responseV0->SetKx4(0.379);
- responseV0->SetSqrtKy3(0.77459667);
- responseV0->SetKy2(0.962);
- responseV0->SetKy4(0.379);
- responseV0->SetPitch(0.25);
-//
-//
-// AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
-
- fCkovNumber=0;
- fFreonProd=0;
- Int_t i=0;
-
- fChambers = new TObjArray(kNCH);
- for (i=0; i<kNCH; 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;
+//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
- for (i=0; i<kNCH; i++) {
- SetGeometryModel(i,geometry);
- SetSegmentationModel(i, segmentationV0);
- SetResponseModel(i, responseV0);
- SetNsec(i,1);
- SetDebugLevel(0);
- }
-
-
-}
-
-void AliRICHv1::Init()
+//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()
{
-
- printf("*********************************** RICH_INIT ***********************************\n");
- printf("* *\n");
- printf("* AliRICHv1 Full version started *\n");
- printf("* *\n");
-
+// 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()
- AliSegmentation* segmentation;
- AliRICHGeometry* geometry;
- AliRICHResponse* response;
-
-
- //
- // Initialize Tracking Chambers
- //
- for (Int_t i=1; i<kNCH; i++) {
- //printf ("i:%d",i);
- ( (AliRICHChamber*) (*fChambers)[i])->Init(i);
- }
+ 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();
- //
- // Set the chamber (sensitive region) GEANT identifier
+ 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;
- ((AliRICHChamber*)(*fChambers)[0])->SetGid(1);
- ((AliRICHChamber*)(*fChambers)[1])->SetGid(2);
- ((AliRICHChamber*)(*fChambers)[2])->SetGid(3);
- ((AliRICHChamber*)(*fChambers)[3])->SetGid(4);
- ((AliRICHChamber*)(*fChambers)[4])->SetGid(5);
- ((AliRICHChamber*)(*fChambers)[5])->SetGid(6);
- ((AliRICHChamber*)(*fChambers)[6])->SetGid(7);
-
- Float_t pos1[3]={0,471.8999,165.2599};
- Chamber(0).SetChamberTransform(pos1[0],pos1[1],pos1[2],new TRotMatrix("rot993","rot993",90,0,70.69,90,19.30999,-90));
- Float_t pos2[3]={171,470,0};
- Chamber(1).SetChamberTransform(pos2[0],pos2[1],pos2[2],new TRotMatrix("rot994","rot994",90,-20,90,70,0,0));
-
- Float_t pos3[3]={0,500,0};
- Chamber(2).SetChamberTransform(pos3[0],pos3[1],pos3[2],new TRotMatrix("rot995","rot995",90,0,90,90,0,0));
+ 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]);
- Float_t pos4[3]={-171,470,0};
- Chamber(3).SetChamberTransform(pos4[0],pos4[1],pos4[2], new TRotMatrix("rot996","rot996",90,20,90,110,0,0));
-
- Float_t pos5[3]={161.3999,443.3999,-165.3};
- Chamber(4).SetChamberTransform(pos5[0],pos5[1],pos5[2],new TRotMatrix("rot997","rot997",90,340,108.1999,70,18.2,70));
-
- Float_t pos6[3]={0., 471.9, -165.3,};
- Chamber(5).SetChamberTransform(pos6[0],pos6[1],pos6[2],new TRotMatrix("rot998","rot998",90,0,109.3099,90,19.30999,90));
-
- Float_t pos7[3]={-161.399,443.3999,-165.3};
- Chamber(6).SetChamberTransform(pos7[0],pos7[1],pos7[2],new TRotMatrix("rot999","rot999",90,20,108.1999,110,18.2,110));
+ // 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];
- segmentation=Chamber(0).GetSegmentationModel(0);
- geometry=Chamber(0).GetGeometryModel();
- response=Chamber(0).GetResponseModel();
+ 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;
+ }
-
- printf("* Pads : %3dx%3d *\n",segmentation->Npx(),segmentation->Npy());
- printf("* Pad size : %5.2f x%5.2f mm2 *\n",segmentation->Dpx(),segmentation->Dpy());
- printf("* Gap Thickness : %5.1f cm *\n",geometry->GetGapThickness());
- printf("* Radiator Width : %5.1f cm *\n",geometry->GetQuartzWidth());
- printf("* Radiator Length : %5.1f cm *\n",geometry->GetQuartzLength());
- printf("* Freon Thickness : %5.1f cm *\n",geometry->GetFreonThickness());
- printf("* Charge Slope : %5.1f ADC *\n",response->ChargeSlope());
- printf("* Feedback Prob. : %5.2f %% *\n",response->AlphaFeedback()*100);
- printf("* Debug Level : %3d *\n",GetDebugLevel());
- printf("* *\n");
- printf("* Success! *\n");
- printf("* *\n");
- printf("*********************************************************************************\n");
-
-}
-
-
-
-
-
-
-
-
+ 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;
+
+ 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