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 <Riostream.h>
24 #include <TLorentzVector.h>
28 #include <TVirtualMC.h>
30 #include "AliCallf77.h"
32 #include "AliMUONChamber.h"
33 #include "AliMUONConstants.h"
34 #include "AliMUONFactory.h"
35 #include "AliMUONHit.h"
36 #include "AliMUONPadHit.h"
37 #include "AliMUONv0.h"
43 //___________________________________________
44 AliMUONv0::AliMUONv0() : AliMUON()
50 //___________________________________________
51 AliMUONv0::AliMUONv0(const char *name, const char *title)
55 AliMUONFactory factory;
56 factory.Build(this, title);
59 void AliMUONv0::CreateGeometry()
61 // Creates coarse geometry for hit density simulations
62 Int_t *idtmed = fIdtmed->GetArray()-1099;
64 Float_t zpos, dAlu, tpar[3];
65 Int_t idAir=idtmed[1100];
66 Int_t idAlu=idtmed[1103];
68 AliMUONChamber *iChamber;
69 // Loop over all chambers (tracking and trigger)
70 for (Int_t ch = 0; ch < AliMUONConstants::NCh(); ch++) {
74 iChamber=(AliMUONChamber*) (*fChambers)[ch];
77 dAlu=iChamber->DAlu();
78 if (ch < AliMUONConstants::NTrackingCh()) {
80 sprintf(alu,"SA0%1d",ch);
81 sprintf(gas,"SG0%1d",ch);
84 sprintf(alu,"SA%2d",ch);
85 sprintf(gas,"SG%2d",ch);
88 tpar[0] = iChamber->RInner();
89 tpar[1] = iChamber->ROuter();
90 tpar[2] = (dAlu+0.2)/2.;
91 if (ch !=4 && ch !=5) {
92 gMC->Gsvolu(alu, "TUBE", idAlu, tpar, 3);
94 gMC->Gsvolu(gas, "TUBE", idAir, tpar, 3);
96 gMC->Gsvolu(alu, "TUBE", idAlu, tpar, 3);
98 gMC->Gsvolu(gas, "TUBE", idAir, tpar, 3);
100 gMC->Gspos(gas, 1, alu, 0., 0., 0., 0, "ONLY");
101 if (ch == 4 || ch ==5) {
102 if (gMC->VolId("DDIP")) {
103 gMC->Gspos(alu, 1, "DDIP", 0., 0., zpos, 0, "ONLY");
105 gMC->Gspos(alu, 1, "ALIC", 0., 0., zpos, 0, "ONLY");
108 gMC->Gspos(alu, 1, "ALIC", 0., 0., zpos, 0, "ONLY");
113 //___________________________________________
114 void AliMUONv0::CreateMaterials()
116 // Creates materials for coarse geometry
117 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
118 AliMaterial( 9, "ALUMINIUM$", 26.98, 13. , 2.7, 8.9, 37.2);
120 Float_t epsil = .001; // Tracking precision,
121 Float_t stemax = -1.; // Maximum displacement for multiple scat
122 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
123 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
125 Int_t isxfld = gAlice->Field()->Integ();
126 Float_t sxmgmx = gAlice->Field()->Max();
130 AliMedium(1, "AIR_CH_US ", 15, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
131 AliMedium(4, "ALU_CH_US ", 9, 0, isxfld, sxmgmx, tmaxfd, fMaxStepAlu,
132 fMaxDestepAlu, epsil, stmin);
136 void AliMUONv0::Init()
139 // Initialize Tracking Chambers
142 printf("\n\n\n Start Init for version 0 - CPC chamber type\n\n\n");
143 for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
144 // Initialise chamber
145 ((AliMUONChamber*) (*fChambers)[i])->Init();
146 // Set sensitive volume Id
147 if (i < AliMUONConstants::NTrackingCh()) {
149 sprintf(vName,"SG0%1d",i);
152 sprintf(vName,"SG%2d",i);
154 ((AliMUONChamber*) (*fChambers)[i])->SetGid(gMC->VolId(vName));
158 void AliMUONv0::StepManager()
161 // Step manager for hit density simulations
171 static Float_t hits[15];
173 TClonesArray &lhits = *fHits;
175 // Only gas gap inside chamber
176 // Tag chambers and record hits when track enters
178 id=gMC->CurrentVolID(copy);
180 for (Int_t i=1; i<=AliMUONConstants::NCh(); i++) {
181 if(id==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()){
186 if (idvol == -1) return;
188 // Get current particle id (ipart), track position (pos) and momentum (mom)
189 gMC->TrackPosition(pos);
190 gMC->TrackMomentum(mom);
192 ipart = gMC->TrackPid();
194 // record hits when track enters ...
195 if( !(gMC->TrackCharge()) ) return;
196 if( gMC->IsTrackEntering()) {
197 // printf("\n Particle entering %f %f %f", pos[0], pos[1], pos[2] );
199 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
200 Double_t rt = TMath::Sqrt(tc);
201 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
202 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
203 hits[0] = Float_t(ipart); // Geant3 particle type
204 hits[1] = pos[0]; // X-position for hit
205 hits[2] = pos[1]; // Y-position for hit
206 hits[3] = pos[2]; // Z-position for hit
207 hits[4] = theta; // theta angle of incidence
208 hits[5] = phi; // phi angle of incidence
209 hits[8] = -1; // first padhit
210 hits[9] = -1; // last pad hit
211 hits[10] = mom[3]; // hit Energy
212 hits[11] = mom[0]; // Px
213 hits[12] = mom[1]; // Py
214 hits[13] = mom[2]; // Pz
215 hits[14] = gMC->TrackTime(); // time of flight
217 AliMUONHit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
220 // if( gMC->IsTrackExiting()) gMC->StopTrack();