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 **************************************************************************/
16 //_________________________________________________________________________
17 // Base Class of PHOS.
18 // Only creates the materials
19 //*-- Author : Laurent Aphecetche SUBATECH
20 //////////////////////////////////////////////////////////////////////////////
22 // --- ROOT system ---
24 // --- Standard library ---
26 // --- AliRoot header files ---
30 //#include "TGeant3.h"
35 //____________________________________________________________________________
36 AliPHOS::AliPHOS(const char* name, const char* title)
37 : AliDetector(name,title)
41 //____________________________________________________________________________
42 AliPHOS::AliPHOS() : AliDetector()
46 //____________________________________________________________________________
53 //____________________________________________________________________________
54 void AliPHOS::CreateMaterials()
56 // DEFINITION OF PHOS MATERIALS
58 // --- The PbWO4 crystals ---
59 Float_t AX[3] = {207.19, 183.85, 16.0} ;
60 Float_t ZX[3] = {82.0, 74.0, 8.0} ;
61 Float_t WX[3] = {1.0, 1.0, 4.0} ;
64 AliMixture(0, "PbWO4$", AX, ZX, DX, -3, WX) ;
67 // --- The polysterene scintillator (CH) ---
68 Float_t AP[2] = {12.011, 1.00794} ;
69 Float_t ZP[2] = {6.0, 1.0} ;
70 Float_t WP[2] = {1.0, 1.0} ;
73 AliMixture(1, "Polystyrene$", AP, ZP, DP, -2, WP) ;
76 AliMaterial(2, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ;
77 // --- Absorption length is ignored ^
79 // --- Tyvek (CnH2n) ---
80 Float_t AT[2] = {12.011, 1.00794} ;
81 Float_t ZT[2] = {6.0, 1.0} ;
82 Float_t WT[2] = {1.0, 2.0} ;
85 AliMixture(3, "Tyvek$", AT, ZT, DT, -2, WT) ;
87 // --- Polystyrene foam ---
88 Float_t AF[2] = {12.011, 1.00794} ;
89 Float_t ZF[2] = {6.0, 1.0} ;
90 Float_t WF[2] = {1.0, 1.0} ;
93 AliMixture(4, "Foam$", AF, ZF, DF, -2, WF) ;
96 Float_t ATIT[3] = {47.88, 26.98, 54.94} ;
97 Float_t ZTIT[3] = {22.0, 13.0, 25.0} ;
98 Float_t WTIT[3] = {69.0, 6.0, 1.0} ;
101 AliMixture(5, "Titanium$", ATIT, ZTIT, DTIT, -3, WTIT);
104 AliMaterial(6, "Si$", 28.0855, 14., 2.33, 9.36, 42.3, 0, 0) ;
108 // --- Foam thermo insulation ---
109 Float_t ATI[2] = {12.011, 1.00794} ;
110 Float_t ZTI[2] = {6.0, 1.0} ;
111 Float_t WTI[2] = {1.0, 1.0} ;
114 AliMixture(7, "Thermo Insul.$", ATI, ZTI, DTI, -2, WTI) ;
117 Float_t ATX[4] = {16.0, 28.09, 12.011, 1.00794} ;
118 Float_t ZTX[4] = {8.0, 14.0, 6.0, 1.0} ;
119 Float_t WTX[4] = {292.0, 68.0, 462.0, 736.0} ;
122 AliMixture(8, "Textolit$", ATX, ZTX, DTX, -4, WTX) ;
125 Float_t AFR[3] = {28.0855, 15.9994, 17.749} ;
126 Float_t ZFR[3] = {14., 8., 8.875} ;
127 Float_t WFR[3] = {.28, .32, .4} ;
130 AliMixture(9, "FR4$", AFR, ZFR, DFR, -3, WFR) ;
132 // --- The Composite Material for micromegas (so far polyetylene) ---
133 Float_t ACM[2] = {12.01, 1.} ;
134 Float_t ZCM[2] = {6., 1.} ;
135 Float_t WCM[2] = {1., 2.} ;
136 Float_t DCM = 0.935 ;
138 AliMixture(10, "Compo Mat$", ACM, ZCM, DCM, -2, WCM) ;
141 AliMaterial(11, "Cu$", 63.546, 29, 8.96, 1.43, 14.8, 0, 0) ;
143 // --- G10 : Printed Circuit material ---
144 Float_t AG10[4] = { 12., 1., 16., 28.} ;
145 Float_t ZG10[4] = { 6., 1., 8., 14.} ;
146 Float_t WG10[4] = { .259, .288, .248, .205} ;
149 AliMixture(12, "G10$", AG10, ZG10, DG10, -4, WG10);
152 AliMaterial(13, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;
154 // --- The gas mixture ---
156 Float_t ACO[2] = {12.0, 16.0} ;
157 Float_t ZCO[2] = {6.0, 8.0} ;
158 Float_t WCO[2] = {1.0, 2.0} ;
159 Float_t DCO = 0.001977 ;
161 AliMixture(14, "CO2$", ACO, ZCO, DCO, -2, WCO);
164 Float_t DAr = 0.001782 ;
165 AliMaterial(15, "Ar$", 39.948, 18.0, DAr, 14.0, 0., 0, 0) ;
174 Float_t AbsL, RadL, Density ;
178 gMC->Gfmate((*fIdmate)[15], namate, AGM[0], ZGM[0], Density, RadL, AbsL, buf, nbuf) ; // Get properties of Ar
179 gMC->Gfmate((*fIdmate)[14], namate, AGM[1], ZGM[1], Density, RadL, AbsL, buf, nbuf) ; // Get properties of CO2
182 // Create gas mixture
184 Float_t ArContent = 0.80 ; // Ar-content of the Ar/CO2-mixture (80% / 20%)
187 WGM[1] = 1. - ArContent ;
188 DGM = WGM[0] * DAr + WGM[1] * DCO;
190 AliMixture(16, "ArCO2$", AGM, ZGM, DGM, 2, WGM) ;
194 AliMaterial(99, "Air$", 14.61, 7.3, 0.001205, 30420., 67500., 0, 0) ;
197 // DEFINITION OF THE TRACKING MEDIA
199 // for PHOS: idtmed[699->798] equivalent to fIdtmed[0->100]
200 Int_t * idtmed = fIdtmed->GetArray() - 699 ;
201 Int_t ISXFLD = gAlice->Field()->Integ() ;
202 Float_t SXMGMX = gAlice->Field()->Max() ;
204 // The scintillator of the calorimeter made of PBW04 -> idtmed[699]
205 AliMedium(0, "PHOS Xtal $", 0, 1,
206 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
208 // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[700]
209 AliMedium(1, "CPV scint. $", 1, 1,
210 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
212 // Various Aluminium parts made of Al -> idtmed[701]
213 AliMedium(2, "Al parts $", 2, 0,
214 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
216 // The Tywek which wraps the calorimeter crystals -> idtmed[702]
217 AliMedium(3, "Tyvek wrapper$", 3, 0,
218 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
220 // The Polystyrene foam around the calorimeter module -> idtmed[703]
221 AliMedium(4, "Polyst. foam $", 4, 0,
222 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
224 // The Titanium around the calorimeter crystal -> idtmed[704]
225 AliMedium(5, "Titan. cover $", 5, 0,
226 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.0001, 0.0001, 0, 0) ;
228 // The Silicon of the pin diode to read out the calorimeter crystal -> idtmed[705]
229 AliMedium(6, "Si PIN $", 6, 0,
230 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.01, 0.01, 0, 0) ;
232 // The thermo insulating material of the box which contains the calorimeter module -> idtmed[706]
233 AliMedium(7, "Thermo Insul.$", 7, 0,
234 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
236 // The Textolit which makes up the box which contains the calorimeter module -> idtmed[707]
237 AliMedium(8, "Textolit $", 8, 0,
238 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
240 // FR4: The Plastic which makes up the frame of micromegas -> idtmed[708]
241 AliMedium(9, "FR4 $", 9, 0,
242 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
245 // The Composite Material for micromegas -> idtmed[709]
246 AliMedium(10, "CompoMat $", 10, 0,
247 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
249 // Copper -> idtmed[710]
250 AliMedium(11, "Copper $", 11, 0,
251 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.0001, 0, 0) ;
253 // G10: Printed Circuit material -> idtmed[711]
255 AliMedium(12, "G10 $", 12, 0,
256 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
258 // The Lead -> idtmed[712]
260 AliMedium(13, "Lead $", 13, 0,
261 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
263 // The gas mixture: ArCo2 -> idtmed[715]
265 AliMedium(16, "ArCo2 $", 16, 1,
266 ISXFLD, SXMGMX, 10.0, 0.1, 0.1, 0.1, 0.01, 0, 0) ;
268 // Air -> idtmed[798]
269 AliMedium(99, "Air $", 99, 0,
270 ISXFLD, SXMGMX, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
272 // --- Set decent energy thresholds for gamma and electron tracking
274 // Tracking threshold for photons and electrons in the scintillator crystal
275 gMC->Gstpar(idtmed[699], "CUTGAM",0.5E-4) ;
276 gMC->Gstpar(idtmed[699], "CUTELE",1.0E-4) ;
278 // --- Generate explicitly delta rays in the titan cover ---
279 gMC->Gstpar(idtmed[704], "LOSS",3.) ;
280 gMC->Gstpar(idtmed[704], "DRAY",1.) ;
282 // --- and in aluminium parts ---
283 gMC->Gstpar(idtmed[701], "LOSS",3.) ;
284 gMC->Gstpar(idtmed[701], "DRAY",1.) ;
286 // Tracking threshold for photons and electrons in the gas ArC02
287 // TGeant3 *geant3 = (TGeant3*)gMC;
288 //geant3->SetERAN(5.e-8, 1.e1,90);
290 gMC->Gstpar(idtmed[715], "CUTGAM",1.E-8) ;
291 gMC->Gstpar(idtmed[715], "CUTELE",1.E-8) ;
292 gMC->Gstpar(idtmed[715], "CUTNEU",1.E-8) ;
293 gMC->Gstpar(idtmed[715], "CUTHAD",1.E-8) ;
294 gMC->Gstpar(idtmed[715], "CUTMUO",1.E-8) ;
295 gMC->Gstpar(idtmed[715], "BCUTE",1.E-8) ;
296 gMC->Gstpar(idtmed[715], "BCUTM",1.E-8) ;
297 gMC->Gstpar(idtmed[715], "DCUTE",1.E-8) ;
298 gMC->Gstpar(idtmed[715], "DCUTM",1.E-8) ;
299 gMC->Gstpar(idtmed[715], "PPCUTM",1.E-8) ;
300 gMC->Gstpar(idtmed[715], "LOSS",2.) ;
301 gMC->Gstpar(idtmed[715], "DRAY",0.) ;
302 gMC->Gstpar(idtmed[715], "STRA",2.) ;