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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
b2a60966 16/* $Id$ */
17
d15a28e7 18//_________________________________________________________________________
b2a60966 19// Base Class for PHOS description:
20// PHOS consists of a PbWO4 calorimeter (EMCA) and a gazeous charged
21// particles detector (CPV or PPSD).
22// The only provided method here is CreateMaterials,
23// which defines the materials common to all PHOS versions.
24//
25//*-- Author: Laurent Aphecetche & Yves Schutz (SUBATECH)
d15a28e7 26//////////////////////////////////////////////////////////////////////////////
e84be1eb 27
fe4da5cc 28// --- ROOT system ---
fe4da5cc 29
30// --- Standard library ---
fe4da5cc 31
d15a28e7 32// --- AliRoot header files ---
33
fe4da5cc 34#include "AliPHOS.h"
d15a28e7 35#include "AliMC.h"
fe4da5cc 36#include "AliRun.h"
fe4da5cc 37
fe4da5cc 38ClassImp(AliPHOS)
39
d15a28e7 40//____________________________________________________________________________
41AliPHOS::~AliPHOS()
fe4da5cc 42{
d15a28e7 43 delete fHits ;
44 delete fDigits ;
fe4da5cc 45}
fe4da5cc 46
d15a28e7 47//____________________________________________________________________________
fe4da5cc 48void AliPHOS::CreateMaterials()
49{
b2a60966 50 // Definitions of materials to build PHOS and associated tracking media.
51 // media number in idtmed are 699 to 798.
fe4da5cc 52
d15a28e7 53 // --- The PbWO4 crystals ---
92862013 54 Float_t aX[3] = {207.19, 183.85, 16.0} ;
55 Float_t zX[3] = {82.0, 74.0, 8.0} ;
56 Float_t wX[3] = {1.0, 1.0, 4.0} ;
57 Float_t dX = 8.28 ;
fe4da5cc 58
92862013 59 AliMixture(0, "PbWO4$", aX, zX, dX, -3, wX) ;
fe4da5cc 60
fe4da5cc 61
d15a28e7 62 // --- The polysterene scintillator (CH) ---
92862013 63 Float_t aP[2] = {12.011, 1.00794} ;
64 Float_t zP[2] = {6.0, 1.0} ;
65 Float_t wP[2] = {1.0, 1.0} ;
66 Float_t dP = 1.032 ;
fe4da5cc 67
92862013 68 AliMixture(1, "Polystyrene$", aP, zP, dP, -2, wP) ;
fe4da5cc 69
d15a28e7 70 // --- Aluminium ---
71 AliMaterial(2, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ;
72 // --- Absorption length is ignored ^
fe4da5cc 73
d15a28e7 74 // --- Tyvek (CnH2n) ---
92862013 75 Float_t aT[2] = {12.011, 1.00794} ;
76 Float_t zT[2] = {6.0, 1.0} ;
77 Float_t wT[2] = {1.0, 2.0} ;
78 Float_t dT = 0.331 ;
fe4da5cc 79
92862013 80 AliMixture(3, "Tyvek$", aT, zT, dT, -2, wT) ;
fe4da5cc 81
d15a28e7 82 // --- Polystyrene foam ---
92862013 83 Float_t aF[2] = {12.011, 1.00794} ;
84 Float_t zF[2] = {6.0, 1.0} ;
85 Float_t wF[2] = {1.0, 1.0} ;
86 Float_t dF = 0.12 ;
fe4da5cc 87
92862013 88 AliMixture(4, "Foam$", aF, zF, dF, -2, wF) ;
fe4da5cc 89
d15a28e7 90 // --- Titanium ---
92862013 91 Float_t aTIT[3] = {47.88, 26.98, 54.94} ;
92 Float_t zTIT[3] = {22.0, 13.0, 25.0} ;
93 Float_t wTIT[3] = {69.0, 6.0, 1.0} ;
94 Float_t dTIT = 4.5 ;
fe4da5cc 95
92862013 96 AliMixture(5, "Titanium$", aTIT, zTIT, dTIT, -3, wTIT);
fe4da5cc 97
d15a28e7 98 // --- Silicon ---
99 AliMaterial(6, "Si$", 28.0855, 14., 2.33, 9.36, 42.3, 0, 0) ;
fe4da5cc 100
fe4da5cc 101
fe4da5cc 102
d15a28e7 103 // --- Foam thermo insulation ---
92862013 104 Float_t aTI[2] = {12.011, 1.00794} ;
105 Float_t zTI[2] = {6.0, 1.0} ;
106 Float_t wTI[2] = {1.0, 1.0} ;
107 Float_t dTI = 0.1 ;
fe4da5cc 108
92862013 109 AliMixture(7, "Thermo Insul.$", aTI, zTI, dTI, -2, wTI) ;
fe4da5cc 110
d15a28e7 111 // --- Textolitn ---
92862013 112 Float_t aTX[4] = {16.0, 28.09, 12.011, 1.00794} ;
113 Float_t zTX[4] = {8.0, 14.0, 6.0, 1.0} ;
114 Float_t wTX[4] = {292.0, 68.0, 462.0, 736.0} ;
115 Float_t dTX = 1.75 ;
fe4da5cc 116
92862013 117 AliMixture(8, "Textolit$", aTX, zTX, dTX, -4, wTX) ;
fe4da5cc 118
d15a28e7 119 //--- FR4 ---
92862013 120 Float_t aFR[3] = {28.0855, 15.9994, 17.749} ;
121 Float_t zFR[3] = {14., 8., 8.875} ;
122 Float_t wFR[3] = {.28, .32, .4} ;
123 Float_t dFR = 1.8 ;
fe4da5cc 124
92862013 125 AliMixture(9, "FR4$", aFR, zFR, dFR, -3, wFR) ;
fe4da5cc 126
d15a28e7 127 // --- The Composite Material for micromegas (so far polyetylene) ---
92862013 128 Float_t aCM[2] = {12.01, 1.} ;
129 Float_t zCM[2] = {6., 1.} ;
130 Float_t wCM[2] = {1., 2.} ;
131 Float_t dCM = 0.935 ;
fe4da5cc 132
92862013 133 AliMixture(10, "Compo Mat$", aCM, zCM, dCM, -2, wCM) ;
fe4da5cc 134
d15a28e7 135 // --- Copper ---
136 AliMaterial(11, "Cu$", 63.546, 29, 8.96, 1.43, 14.8, 0, 0) ;
137
138 // --- G10 : Printed Circuit material ---
92862013 139 Float_t aG10[4] = { 12., 1., 16., 28.} ;
140 Float_t zG10[4] = { 6., 1., 8., 14.} ;
141 Float_t wG10[4] = { .259, .288, .248, .205} ;
142 Float_t dG10 = 1.7 ;
d15a28e7 143
92862013 144 AliMixture(12, "G10$", aG10, zG10, dG10, -4, wG10);
fe4da5cc 145
d15a28e7 146 // --- Lead ---
147 AliMaterial(13, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;
fe4da5cc 148
d15a28e7 149 // --- The gas mixture ---
150 // Co2
92862013 151 Float_t aCO[2] = {12.0, 16.0} ;
152 Float_t zCO[2] = {6.0, 8.0} ;
153 Float_t wCO[2] = {1.0, 2.0} ;
154 Float_t dCO = 0.001977 ;
fe4da5cc 155
92862013 156 AliMixture(14, "CO2$", aCO, zCO, dCO, -2, wCO);
fe4da5cc 157
d15a28e7 158 // Ar
92862013 159 Float_t dAr = 0.001782 ;
160 AliMaterial(15, "Ar$", 39.948, 18.0, dAr, 14.0, 0., 0, 0) ;
d15a28e7 161
162 // ArCo2
163 Char_t namate[21];
92862013 164 Float_t aGM[2] ;
165 Float_t zGM[2] ;
166 Float_t wGM[2] ;
167 Float_t dGM ;
fe4da5cc 168
92862013 169 Float_t absL, radL, density ;
d15a28e7 170 Float_t buf[1] ;
171 Int_t nbuf ;
bc9ab547 172
92862013 173 gMC->Gfmate((*fIdmate)[15], namate, aGM[0], zGM[0], density, radL, absL, buf, nbuf) ; // Get properties of Ar
174 gMC->Gfmate((*fIdmate)[14], namate, aGM[1], zGM[1], density, radL, absL, buf, nbuf) ; // Get properties of CO2
bc9ab547 175
fe4da5cc 176
d15a28e7 177 // Create gas mixture
fe4da5cc 178
92862013 179 Float_t arContent = 0.80 ; // Ar-content of the Ar/CO2-mixture (80% / 20%)
d15a28e7 180
92862013 181 wGM[0] = arContent;
182 wGM[1] = 1. - arContent ;
183 dGM = wGM[0] * dAr + wGM[1] * dCO;
fe4da5cc 184
92862013 185 AliMixture(16, "ArCO2$", aGM, zGM, dGM, 2, wGM) ;
fe4da5cc 186
d15a28e7 187
188 // --- Air ---
189 AliMaterial(99, "Air$", 14.61, 7.3, 0.001205, 30420., 67500., 0, 0) ;
fe4da5cc 190
d15a28e7 191
192 // DEFINITION OF THE TRACKING MEDIA
fe4da5cc 193
d15a28e7 194 // for PHOS: idtmed[699->798] equivalent to fIdtmed[0->100]
195 Int_t * idtmed = fIdtmed->GetArray() - 699 ;
92862013 196 Int_t isxfld = gAlice->Field()->Integ() ;
197 Float_t sxmgmx = gAlice->Field()->Max() ;
fe4da5cc 198
d15a28e7 199 // The scintillator of the calorimeter made of PBW04 -> idtmed[699]
200 AliMedium(0, "PHOS Xtal $", 0, 1,
92862013 201 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
fe4da5cc 202
d15a28e7 203 // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[700]
204 AliMedium(1, "CPV scint. $", 1, 1,
92862013 205 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
fe4da5cc 206
d15a28e7 207 // Various Aluminium parts made of Al -> idtmed[701]
208 AliMedium(2, "Al parts $", 2, 0,
92862013 209 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
fe4da5cc 210
d15a28e7 211 // The Tywek which wraps the calorimeter crystals -> idtmed[702]
212 AliMedium(3, "Tyvek wrapper$", 3, 0,
92862013 213 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
fe4da5cc 214
d15a28e7 215 // The Polystyrene foam around the calorimeter module -> idtmed[703]
216 AliMedium(4, "Polyst. foam $", 4, 0,
92862013 217 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
fe4da5cc 218
d15a28e7 219 // The Titanium around the calorimeter crystal -> idtmed[704]
220 AliMedium(5, "Titan. cover $", 5, 0,
92862013 221 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.0001, 0.0001, 0, 0) ;
fe4da5cc 222
d15a28e7 223 // The Silicon of the pin diode to read out the calorimeter crystal -> idtmed[705]
224 AliMedium(6, "Si PIN $", 6, 0,
92862013 225 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.01, 0.01, 0, 0) ;
fe4da5cc 226
d15a28e7 227 // The thermo insulating material of the box which contains the calorimeter module -> idtmed[706]
228 AliMedium(7, "Thermo Insul.$", 7, 0,
92862013 229 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
fe4da5cc 230
d15a28e7 231 // The Textolit which makes up the box which contains the calorimeter module -> idtmed[707]
232 AliMedium(8, "Textolit $", 8, 0,
92862013 233 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
fe4da5cc 234
d15a28e7 235 // FR4: The Plastic which makes up the frame of micromegas -> idtmed[708]
236 AliMedium(9, "FR4 $", 9, 0,
92862013 237 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
fe4da5cc 238
fe4da5cc 239
d15a28e7 240 // The Composite Material for micromegas -> idtmed[709]
241 AliMedium(10, "CompoMat $", 10, 0,
92862013 242 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
fe4da5cc 243
d15a28e7 244 // Copper -> idtmed[710]
245 AliMedium(11, "Copper $", 11, 0,
92862013 246 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
fe4da5cc 247
d15a28e7 248 // G10: Printed Circuit material -> idtmed[711]
249
250 AliMedium(12, "G10 $", 12, 0,
92862013 251 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
fe4da5cc 252
d15a28e7 253 // The Lead -> idtmed[712]
254
255 AliMedium(13, "Lead $", 13, 0,
92862013 256 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
fe4da5cc 257
d15a28e7 258 // The gas mixture: ArCo2 -> idtmed[715]
259
260 AliMedium(16, "ArCo2 $", 16, 1,
92862013 261 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
d15a28e7 262
263 // Air -> idtmed[798]
264 AliMedium(99, "Air $", 99, 0,
92862013 265 isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
fe4da5cc 266
d15a28e7 267 // --- Set decent energy thresholds for gamma and electron tracking
fe4da5cc 268
d15a28e7 269 // Tracking threshold for photons and electrons in the scintillator crystal
270 gMC->Gstpar(idtmed[699], "CUTGAM",0.5E-4) ;
271 gMC->Gstpar(idtmed[699], "CUTELE",1.0E-4) ;
9f616d61 272
d15a28e7 273 // --- Generate explicitly delta rays in the titan cover ---
274 gMC->Gstpar(idtmed[704], "LOSS",3.) ;
275 gMC->Gstpar(idtmed[704], "DRAY",1.) ;
d15a28e7 276 // --- and in aluminium parts ---
277 gMC->Gstpar(idtmed[701], "LOSS",3.) ;
278 gMC->Gstpar(idtmed[701], "DRAY",1.) ;
92862013 279 // --- and in PIN diode
280 gMC->Gstpar(idtmed[705], "LOSS",3) ;
281 gMC->Gstpar(idtmed[705], "DRAY",1) ;
282 // --- and in the passive convertor
283 gMC->Gstpar(idtmed[712], "LOSS",3) ;
284 gMC->Gstpar(idtmed[712], "DRAY",1) ;
285 // Tracking threshold for photons and electrons in the gas ArC02
b7101219 286 gMC->Gstpar(idtmed[715], "CUTGAM",1.E-5) ;
287 gMC->Gstpar(idtmed[715], "CUTELE",1.E-5) ;
288 gMC->Gstpar(idtmed[715], "CUTNEU",1.E-5) ;
289 gMC->Gstpar(idtmed[715], "CUTHAD",1.E-5) ;
290 gMC->Gstpar(idtmed[715], "CUTMUO",1.E-5) ;
291 gMC->Gstpar(idtmed[715], "BCUTE",1.E-5) ;
292 gMC->Gstpar(idtmed[715], "BCUTM",1.E-5) ;
293 gMC->Gstpar(idtmed[715], "DCUTE",1.E-5) ;
294 gMC->Gstpar(idtmed[715], "DCUTM",1.E-5) ;
295 gMC->Gstpar(idtmed[715], "PPCUTM",1.E-5) ;
9f616d61 296 gMC->Gstpar(idtmed[715], "LOSS",2.) ;
297 gMC->Gstpar(idtmed[715], "DRAY",0.) ;
298 gMC->Gstpar(idtmed[715], "STRA",2.) ;
299
0c409cb2 300}
301
302//____________________________________________________________________________
303RecPointsList * AliPHOS::EmcRecPoints(Int_t evt)
304{
305 // returns the pointer to the EMCA RecPoints list
306 // if the list is empty, get it from TreeR on the disk file
307
308 RecPointsList * rv = 0 ;
309
310 if ( fEmcRecPoints )
311 rv = fEmcRecPoints ;
312
313 else {
314 fEmcRecPoints = new TClonesArray("AliPHOSEmcRecPoint", 100) ;
315 gAlice->GetEvent(evt) ;
316 TTree * fReconstruct = gAlice->TreeR() ;
317 fReconstruct->SetBranchAddress( "PHOSEmcRP", &fEmcRecPoints) ;
318 fReconstruct->GetEvent(0) ;
319 fEmcRecPoints->Expand( fEmcRecPoints->GetEntries() ) ;
320 rv = fEmcRecPoints ;
321 }
322
323 return rv ;
324
325}
326
327//____________________________________________________________________________
328RecParticlesList * AliPHOS::RecParticles(Int_t evt)
329{
330 // returns the pointer to the RecParticles list
331 // if the list is empty, get it from TreeR on the disk file
332
333 RecParticlesList * rv = 0 ;
9f616d61 334
0c409cb2 335 if ( fRecParticles )
336 rv = fRecParticles ;
337
338 else {
339 fRecParticles = new TClonesArray("AliPHOSRecParticle", 100) ;
340 gAlice->GetEvent(evt) ;
341 TTree * fReconstruct = gAlice->TreeR() ;
342 fReconstruct->SetBranchAddress( "PHOSRP", &fRecParticles) ;
343 fReconstruct->GetEvent(0) ;
344 fRecParticles->Expand( fRecParticles->GetEntries() ) ;
345 rv = fRecParticles ;
346 }
9f616d61 347
0c409cb2 348 return rv ;
349
350}
351
352//____________________________________________________________________________
353RecParticlesList * AliPHOS::TrackSegments(Int_t evt)
354{
355 // returns the pointer to the TrackSegments list
356 // if the list is empty, get it from TreeR on the disk file
9f616d61 357
0c409cb2 358 TrackSegmentsList * rv = 0 ;
359
360 if ( fTrackSegments )
361 rv = fTrackSegments ;
362
363 else {
364 fTrackSegments = new TClonesArray("AliPHOSTrackSegment", 100) ;
365 gAlice->GetEvent(evt) ;
366 TTree * fReconstruct = gAlice->TreeR() ;
367 fReconstruct->SetBranchAddress( "PHOSTS", &fTrackSegments) ;
368 fReconstruct->GetEvent(0) ;
369 fTrackSegments->Expand( fTrackSegments->GetEntries() ) ;
370 rv = fTrackSegments ;
371 }
372
373 return rv ;
374
fe4da5cc 375}