1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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8 * documentation strictly for non-commercial purposes is hereby granted *
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11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 //_________________________________________________________________________
19 // Implementation version v1 of EMCAL Manager class
20 // An object of this class does not produce digits
21 // It is the one to use if you do want to produce outputs in TREEH
23 //*-- Author: Sahal Yacoob (LBL /UCT)
24 //*-- : Jennifer Klay (LBL)
26 // This Class not stores information on all particles prior to EMCAL entry - in order to facilitate analysis.
27 // This is done by setting fIShunt =2, and flagging all parents of particles entering the EMCAL.
29 // 15/02/2002 .... Yves Schutz
30 // 1. fSamplingFraction and fLayerToPreshowerRatio have been removed
31 // 2. Timing signal is collected and added to hit
33 // --- ROOT system ---
39 #include "TGeometry.h"
40 #include "TParticle.h"
42 // --- Standard library ---
47 #include <strstream.h>
50 // --- AliRoot header files ---
52 #include "AliEMCALv1.h"
53 #include "AliEMCALHit.h"
54 #include "AliEMCALGeometry.h"
62 //______________________________________________________________________
63 AliEMCALv1::AliEMCALv1():AliEMCALv0(){
67 //______________________________________________________________________
68 AliEMCALv1::AliEMCALv1(const char *name, const char *title):
69 AliEMCALv0(name,title){
72 fHits= new TClonesArray("AliEMCALHit",1000);
73 gAlice->AddHitList(fHits);
76 fIshunt = 2; // All hits are associated with particles entering the calorimeter
79 //______________________________________________________________________
80 AliEMCALv1::~AliEMCALv1(){
89 //______________________________________________________________________
90 void AliEMCALv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t iparent, Float_t ienergy,
91 Int_t id, Float_t * hits,Float_t * p){
92 // Add a hit to the hit list.
93 // An EMCAL hit is the sum of all hits in a single segment
94 // originating from the same enterring particle
101 newHit = new AliEMCALHit(shunt, primary, tracknumber, iparent, ienergy, id, hits, p);
102 for ( hitCounter = fNhits-1; hitCounter >= 0 && !deja; hitCounter-- ) {
103 curHit = (AliEMCALHit*) (*fHits)[hitCounter];
104 // We add hits with the same tracknumber, while GEANT treats
105 // primaries succesively
106 if(curHit->GetPrimary() != primary) break;
107 if( *curHit == *newHit ) {
108 *curHit = *curHit + *newHit;
111 } // end for hitCounter
114 new((*fHits)[fNhits]) AliEMCALHit(*newHit);
120 //______________________________________________________________________
121 void AliEMCALv1::StepManager(void){
122 // Accumulates hits as long as the track stays in a single
123 // crystal or PPSD gas Cell
125 Int_t id[2]; // (layer, phi, Eta) indices
127 // position wrt MRS and energy deposited
128 Float_t xyzte[5]={0.,0.,0.,0.,0.};// position wrt MRS, time and energy deposited
129 Float_t pmom[4]={0.,0.,0.,0.};
130 TLorentzVector pos; // Lorentz vector of the track current position.
131 TLorentzVector mom; // Lorentz vector of the track current momentum.
132 Int_t tracknumber = gAlice->CurrentTrack();
134 static Int_t iparent = 0;
135 static Float_t ienergy = 0;
139 if(gMC->IsTrackEntering() && (strcmp(gMC->CurrentVolName(),"XALU") == 0)){ // This Particle in enterring the Calorimeter
140 gMC->TrackPosition(pos) ;
144 if ( (xyzte[0]*xyzte[0] + xyzte[1]*xyzte[1])
145 < (fGeom->GetEnvelop(0)+fGeom->GetGap2Active()+1.5 )*(fGeom->GetEnvelop(0)+fGeom->GetGap2Active()+1.5 ) ) {
146 iparent = tracknumber;
147 gMC->TrackMomentum(mom);
149 TParticle * part = 0 ;
150 Int_t parent = iparent ;
151 while ( parent != -1 ) { // <------------- flags this particle to be kept and
152 //all the ancestors of this particle
153 part = gAlice->Particle(parent) ;
154 part->SetBit(kKeepBit);
155 parent = part->GetFirstMother() ;
159 if(gMC->CurrentVolID(copy) == gMC->VolId("XPHI") ) { // We are in a Scintillator Layer
161 gMC->CurrentVolOffID(1, id[0]); // get the POLY copy number;
162 gMC->CurrentVolID(id[1]); // get the phi number inside the layer
163 primary = gAlice->GetPrimary(tracknumber);
164 gMC->TrackPosition(pos);
165 gMC->TrackMomentum(mom);
169 xyzte[3] = gMC->TrackTime() ;
170 xyzte[4] = gMC->Edep();
176 if(xyzte[4] > 0.){// Track is inside a scintillator and deposits some energy
177 absid = (id[0]-1)*(fGeom->GetNPhi()) + id[1];
178 AddHit(fIshunt, primary,tracknumber, iparent, ienergy, absid, xyzte, pmom);
179 } // there is deposited energy