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[u/mrichter/AliRoot.git] / MUON / AliMUONv0.cxx
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4c039060 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
88cb7938 16/* $Id$ */
4c039060 17
fe4da5cc 18/////////////////////////////////////////////////////////
19// Manager and hits classes for set:MUON version 0 //
20/////////////////////////////////////////////////////////
21
116cbefd 22#include <Riostream.h>
88cb7938 23
116cbefd 24#include <TLorentzVector.h>
fe4da5cc 25#include <TNode.h>
26#include <TRandom.h>
116cbefd 27#include <TTUBE.h>
88cb7938 28#include <TVirtualMC.h>
fe4da5cc 29
fe4da5cc 30#include "AliCallf77.h"
31#include "AliConst.h"
88cb7938 32#include "AliMUONChamber.h"
f665c1ea 33#include "AliMUONConstants.h"
be3bb6c1 34#include "AliMUONFactory.h"
88cb7938 35#include "AliMUONHit.h"
36#include "AliMUONPadHit.h"
37#include "AliMUONv0.h"
38#include "AliMagF.h"
39#include "AliRun.h"
40
fe4da5cc 41ClassImp(AliMUONv0)
42
43//___________________________________________
44AliMUONv0::AliMUONv0() : AliMUON()
45{
a9e2aefa 46// Constructor
fe4da5cc 47 fChambers = 0;
48}
49
50//___________________________________________
51AliMUONv0::AliMUONv0(const char *name, const char *title)
52 : AliMUON(name,title)
53{
a9e2aefa 54// Constructor
ba030c0e 55 AliMUONFactory factory;
56 factory.Build(this, title);
a897a37a 57}
58
a9e2aefa 59void AliMUONv0::CreateGeometry()
60{
61// Creates coarse geometry for hit density simulations
62 Int_t *idtmed = fIdtmed->GetArray()-1099;
fe4da5cc 63//
a9e2aefa 64 Float_t zpos, dAlu, tpar[3];
65 Int_t idAir=idtmed[1100];
66 Int_t idAlu=idtmed[1103];
67
68 AliMUONChamber *iChamber;
69 // Loop over all chambers (tracking and trigger)
f665c1ea 70 for (Int_t ch = 0; ch < AliMUONConstants::NCh(); ch++) {
a9e2aefa 71 char alu[8];
72 char gas[8];
73
74 iChamber=(AliMUONChamber*) (*fChambers)[ch];
75 // Z of the chamber
76 zpos=iChamber->Z();
77 dAlu=iChamber->DAlu();
f665c1ea 78 if (ch < AliMUONConstants::NTrackingCh()) {
a9e2aefa 79 // tracking chambers
b74f1c6a 80 sprintf(alu,"SA0%1d",ch);
81 sprintf(gas,"SG0%1d",ch);
a9e2aefa 82 } else {
83 // trigger chambers
b74f1c6a 84 sprintf(alu,"SA%2d",ch);
85 sprintf(gas,"SG%2d",ch);
a9e2aefa 86 }
87//
a9e2aefa 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);
93 tpar[2] = 0.1;
94 gMC->Gsvolu(gas, "TUBE", idAir, tpar, 3);
95 } else {
96 gMC->Gsvolu(alu, "TUBE", idAlu, tpar, 3);
97 tpar[2] = 0.1;
98 gMC->Gsvolu(gas, "TUBE", idAir, tpar, 3);
99 }
100 gMC->Gspos(gas, 1, alu, 0., 0., 0., 0, "ONLY");
afa281f0 101 if (ch == 4 || ch ==5) {
82e22b99 102 if (gMC->VolId("DDIP")) {
103 gMC->Gspos(alu, 1, "DDIP", 0., 0., zpos, 0, "ONLY");
104 } else {
105 gMC->Gspos(alu, 1, "ALIC", 0., 0., zpos, 0, "ONLY");
106 }
afa281f0 107 } else {
108 gMC->Gspos(alu, 1, "ALIC", 0., 0., zpos, 0, "ONLY");
109 }
a897a37a 110 }
fe4da5cc 111}
112
fe4da5cc 113//___________________________________________
114void AliMUONv0::CreateMaterials()
115{
a9e2aefa 116// Creates materials for coarse geometry
82e22b99 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);
fe4da5cc 119
a9e2aefa 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
124 Float_t stmin = -.8;
125 Int_t isxfld = gAlice->Field()->Integ();
126 Float_t sxmgmx = gAlice->Field()->Max();
fe4da5cc 127
fe4da5cc 128 //
a9e2aefa 129 // Air
130 AliMedium(1, "AIR_CH_US ", 15, 1, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
82e22b99 131 AliMedium(4, "ALU_CH_US ", 9, 0, isxfld, sxmgmx, tmaxfd, fMaxStepAlu,
a897a37a 132 fMaxDestepAlu, epsil, stmin);
133
fe4da5cc 134}
135
fe4da5cc 136void AliMUONv0::Init()
137{
fe4da5cc 138 //
139 // Initialize Tracking Chambers
140 //
b9046b8f 141 char vName[8];
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()) {
148 // tracking chambers
b74f1c6a 149 sprintf(vName,"SG0%1d",i);
b9046b8f 150 } else {
151 // trigger chambers
b74f1c6a 152 sprintf(vName,"SG%2d",i);
b9046b8f 153 }
154 ((AliMUONChamber*) (*fChambers)[i])->SetGid(gMC->VolId(vName));
155 }
fe4da5cc 156}
157
fe4da5cc 158void AliMUONv0::StepManager()
159{
a9e2aefa 160//
161// Step manager for hit density simulations
fe4da5cc 162 Int_t copy, id;
163 static Int_t idvol;
164 static Int_t vol[2];
165 Int_t ipart;
a897a37a 166 TLorentzVector pos;
167 TLorentzVector mom;
168 Float_t theta,phi;
fe4da5cc 169
a897a37a 170 // modifs perso
a9e2aefa 171 static Float_t hits[15];
a897a37a 172
fe4da5cc 173 TClonesArray &lhits = *fHits;
fe4da5cc 174 //
175 // Only gas gap inside chamber
176 // Tag chambers and record hits when track enters
177 idvol=-1;
0a6d8768 178 id=gMC->CurrentVolID(copy);
fe4da5cc 179
f665c1ea 180 for (Int_t i=1; i<=AliMUONConstants::NCh(); i++) {
a9e2aefa 181 if(id==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()){
fe4da5cc 182 vol[0]=i;
183 idvol=i-1;
184 }
185 }
186 if (idvol == -1) return;
187 //
188 // Get current particle id (ipart), track position (pos) and momentum (mom)
cfce8870 189 gMC->TrackPosition(pos);
190 gMC->TrackMomentum(mom);
fe4da5cc 191
cfce8870 192 ipart = gMC->TrackPid();
fe4da5cc 193 //
194 // record hits when track enters ...
9fde056a 195 if( !(gMC->TrackCharge()) ) return;
0a6d8768 196 if( gMC->IsTrackEntering()) {
82e22b99 197// printf("\n Particle entering %f %f %f", pos[0], pos[1], pos[2] );
198
a897a37a 199 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
200 Double_t rt = TMath::Sqrt(tc);
a897a37a 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;
a9e2aefa 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
2eb55fab 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
fe4da5cc 216 new(lhits[fNhits++])
a9e2aefa 217 AliMUONHit(fIshunt,gAlice->CurrentTrack(),vol,hits);
218
fe4da5cc 219 }
82e22b99 220// if( gMC->IsTrackExiting()) gMC->StopTrack();
fe4da5cc 221}
a9e2aefa 222
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