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. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
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 // Manager and hits classes for set:MUON version 0 //
20 /////////////////////////////////////////////////////////
22 #include <TLorentzVector.h>
23 #include <TVirtualMC.h>
26 #include "AliMUONChamber.h"
27 #include "AliMUONChamberGeometry.h"
28 #include "AliMUONConstants.h"
29 #include "AliMUONFactory.h"
30 #include "AliMUONHit.h"
31 #include "AliMUONv0.h"
38 //___________________________________________
39 AliMUONv0::AliMUONv0()
46 //___________________________________________
47 AliMUONv0::AliMUONv0(const char *name, const char *title)
51 AliMUONFactory factory;
52 factory.Build(this, title);
55 //___________________________________________
56 void AliMUONv0::CreateGeometry()
58 // Creates coarse geometry for hit density simulations
59 Int_t *idtmed = fIdtmed->GetArray()-1099;
61 Float_t zpos, dAlu, tpar[3];
62 Int_t idAir=idtmed[1100];
63 Int_t idAlu=idtmed[1103];
65 AliMUONChamber *iChamber;
66 // Loop over all chambers (tracking and trigger)
67 for (Int_t ch = 0; ch < AliMUONConstants::NCh(); ch++) {
71 iChamber=(AliMUONChamber*) (*fChambers)[ch];
74 dAlu=iChamber->DAlu();
75 if (ch < AliMUONConstants::NTrackingCh()) {
77 sprintf(alu,"SA0%1d",ch);
78 sprintf(gas,"SG0%1d",ch);
81 sprintf(alu,"SA%2d",ch);
82 sprintf(gas,"SG%2d",ch);
85 tpar[0] = iChamber->RInner();
86 tpar[1] = iChamber->ROuter();
87 tpar[2] = (dAlu+0.2)/2.;
88 if (ch !=4 && ch !=5) {
89 gMC->Gsvolu(alu, "TUBE", idAlu, tpar, 3);
91 gMC->Gsvolu(gas, "TUBE", idAir, tpar, 3);
93 gMC->Gsvolu(alu, "TUBE", idAlu, tpar, 3);
95 gMC->Gsvolu(gas, "TUBE", idAir, tpar, 3);
97 gMC->Gspos(gas, 1, alu, 0., 0., 0., 0, "ONLY");
98 if (ch == 4 || ch ==5) {
99 if (gMC->VolId("DDIP")) {
100 gMC->Gspos(alu, 1, "DDIP", 0., 0., zpos, 0, "ONLY");
102 gMC->Gspos(alu, 1, "ALIC", 0., 0., zpos, 0, "ONLY");
105 gMC->Gspos(alu, 1, "ALIC", 0., 0., zpos, 0, "ONLY");
110 //___________________________________________
111 void AliMUONv0::CreateMaterials()
113 // Creates materials for coarse geometry
115 Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
116 Float_t zAir[4]={6.,7.,8.,18.};
117 Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
118 Float_t dAir = 1.20479E-3;
119 AliMixture(15, "AIR$ ", aAir, zAir, dAir,4, wAir);
120 // AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
121 AliMaterial( 9, "ALUMINIUM$", 26.98, 13. , 2.7, 8.9, 37.2);
123 Float_t epsil = .001; // Tracking precision,
124 Float_t stemax = -1.; // Maximum displacement for multiple scat
125 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
126 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
128 Int_t isxfld = gAlice->Field()->Integ();
129 Float_t sxmgmx = gAlice->Field()->Max();
133 AliMedium(1, "AIR_CH_US ", 15, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
134 AliMedium(4, "ALU_CH_US ", 9, 0, isxfld, sxmgmx, tmaxfd, fMaxStepAlu,
135 fMaxDestepAlu, epsil, stmin);
139 void AliMUONv0::Init()
142 // Initialize Tracking Chambers
145 printf("\n\n\n Start Init for version 0 - CPC chamber type\n\n\n");
146 for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
147 // Initialise chamber
148 ((AliMUONChamber*) (*fChambers)[i])->Init();
149 // Set sensitive volume Id
150 if (i < AliMUONConstants::NTrackingCh()) {
152 sprintf(vName,"SG0%1d",i);
155 sprintf(vName,"SG%2d",i);
157 //((AliMUONChamber*) (*fChambers)[i])->SetGid(gMC->VolId(vName));
158 ((AliMUONChamber*) (*fChambers)[i])
159 ->GetGeometry()->SetSensitiveVolume(gMC->VolId(vName));
163 void AliMUONv0::StepManager()
166 // Step manager for hit density simulations
176 static Float_t hits[15];
178 TClonesArray &lhits = *fHits;
180 // Only gas gap inside chamber
181 // Tag chambers and record hits when track enters
183 id=gMC->CurrentVolID(copy);
185 for (Int_t i=1; i<=AliMUONConstants::NCh(); i++) {
186 //if(id==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()){
187 if ( ((AliMUONChamber*)(*fChambers)[i-1])->IsSensId(id) ) {
192 if (idvol == -1) return;
194 // Get current particle id (ipart), track position (pos) and momentum (mom)
195 gMC->TrackPosition(pos);
196 gMC->TrackMomentum(mom);
198 ipart = gMC->TrackPid();
200 // record hits when track enters ...
201 if( !(gMC->TrackCharge()) ) return;
202 if( gMC->IsTrackEntering()) {
203 // printf("\n Particle entering %f %f %f", pos[0], pos[1], pos[2] );
205 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
206 Double_t rt = TMath::Sqrt(tc);
207 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
208 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
209 hits[0] = Float_t(ipart); // Geant3 particle type
210 hits[1] = pos[0]; // X-position for hit
211 hits[2] = pos[1]; // Y-position for hit
212 hits[3] = pos[2]; // Z-position for hit
213 hits[4] = theta; // theta angle of incidence
214 hits[5] = phi; // phi angle of incidence
215 hits[8] = -1; // first padhit
216 hits[9] = -1; // last pad hit
217 hits[10] = mom[3]; // hit Energy
218 hits[11] = mom[0]; // Px
219 hits[12] = mom[1]; // Py
220 hits[13] = mom[2]; // Pz
221 hits[14] = gMC->TrackTime(); // time of flight
223 AliMUONHit(fIshunt,gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
226 // if( gMC->IsTrackExiting()) gMC->StopTrack();