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4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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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"
41 #include "TVirtualMC.h"
43 // --- Standard library ---
48 #include <Rstrstream.h>
49 #include <Riostream.h>
52 // --- AliRoot header files ---
54 #include "AliEMCALv1.h"
55 #include "AliEMCALHit.h"
56 #include "AliEMCALGeometry.h"
64 //______________________________________________________________________
65 AliEMCALv1::AliEMCALv1():AliEMCALv0(){
70 //______________________________________________________________________
71 AliEMCALv1::AliEMCALv1(const char *name, const char *title):
72 AliEMCALv0(name,title){
75 fHits= new TClonesArray("AliEMCALHit",1000);
76 gAlice->GetMCApp()->AddHitList(fHits);
79 fIshunt = 2; // All hits are associated with particles entering the calorimeter
82 //______________________________________________________________________
83 AliEMCALv1::~AliEMCALv1(){
92 //______________________________________________________________________
93 void AliEMCALv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t iparent, Float_t ienergy,
94 Int_t id, Float_t * hits,Float_t * p){
95 // Add a hit to the hit list.
96 // An EMCAL hit is the sum of all hits in a tower section (PRE, ECAL, HCAL)
97 // originating from the same entering particle
102 Bool_t deja = kFALSE;
104 newHit = new AliEMCALHit(shunt, primary, tracknumber, iparent, ienergy, id, hits, p);
105 for ( hitCounter = fNhits-1; hitCounter >= 0 && !deja; hitCounter-- ) {
106 curHit = (AliEMCALHit*) (*fHits)[hitCounter];
107 // We add hits with the same tracknumber, while GEANT treats
108 // primaries succesively
109 if(curHit->GetPrimary() != primary)
111 if( *curHit == *newHit ) {
112 *curHit = *curHit + *newHit;
115 } // end for hitCounter
118 new((*fHits)[fNhits]) AliEMCALHit(*newHit);
124 //______________________________________________________________________
125 void AliEMCALv1::StepManager(void){
126 // Accumulates hits as long as the track stays in a single
127 // crystal or PPSD gas Cell
129 Int_t id[2]; // (layer, phi, Eta) indices
130 // position wrt MRS and energy deposited
131 Float_t xyzte[5]={0.,0.,0.,0.,0.};// position wrt MRS, time and energy deposited
132 Float_t pmom[4]={0.,0.,0.,0.};
133 TLorentzVector pos; // Lorentz vector of the track current position.
134 TLorentzVector mom; // Lorentz vector of the track current momentum.
135 Int_t tracknumber = gAlice->GetMCApp()->GetCurrentTrackNumber();
137 static Int_t iparent = 0;
138 static Float_t ienergy = 0;
141 AliEMCALGeometry * geom = GetGeometry() ;
143 if(gMC->IsTrackEntering() && (strcmp(gMC->CurrentVolName(),"XALU") == 0)){ // This Particle in enterring the Calorimeter
144 gMC->TrackPosition(pos) ;
148 if ( (xyzte[0]*xyzte[0] + xyzte[1]*xyzte[1])
149 < (geom->GetEnvelop(0)+geom->GetGap2Active()+1.5 )*(geom->GetEnvelop(0)+geom->GetGap2Active()+1.5 ) ) {
150 iparent = tracknumber;
151 gMC->TrackMomentum(mom);
153 TParticle * part = 0 ;
154 Int_t parent = iparent ;
155 while ( parent != -1 ) { // <------------- flags this particle to be kept and
156 //all the ancestors of this particle
157 part = gAlice->GetMCApp()->Particle(parent) ;
158 part->SetBit(kKeepBit);
159 parent = part->GetFirstMother() ;
163 if(gMC->CurrentVolID(copy) == gMC->VolId("XPHI") ) { // We are in a Scintillator Layer
165 Float_t depositedEnergy ;
167 if( (depositedEnergy = gMC->Edep()) > 0.){// Track is inside a scintillator and deposits some energy
169 gMC->TrackPosition(pos);
173 xyzte[3] = gMC->TrackTime() ;
175 gMC->TrackMomentum(mom);
181 gMC->CurrentVolOffID(1, id[0]); // get the POLY copy number;
182 gMC->CurrentVolID(id[1]); // get the phi number inside the layer
184 Int_t tower = (id[0]-1) % geom->GetNZ() + 1 + (id[1] - 1) * geom->GetNZ() ;
185 Int_t layer = static_cast<Int_t>((id[0]-1)/(geom->GetNZ())) + 1 ;
186 Int_t absid = tower ;
187 if (layer <= geom->GetNPRLayers() )
188 absid += geom->GetNZ() * geom->GetNPhi() ;
189 else if (layer > geom->GetNECLayers() )
190 absid += 2 * geom->GetNZ() * geom->GetNPhi() ;
192 Int_t nlayers = geom->GetNPRLayers()+ geom->GetNECLayers()+ geom->GetNHCLayers() ;
194 Fatal("StepManager", "Wrong calculation of layer number: layer = %d > %d\n", layer, nlayers) ;
197 Float_t lightYield = depositedEnergy ;
199 xyzte[4] = lightYield ;
201 primary = gAlice->GetMCApp()->GetPrimary(tracknumber);
204 Info("StepManager", "id0 = %d, id1 = %d, absid = %d tower = %d layer = %d energy = %f\n", id[0], id[1], absid, tower, layer, xyzte[4]) ;
206 AddHit(fIshunt, primary,tracknumber, iparent, ienergy, absid, xyzte, pmom);
207 } // there is deposited energy