1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * SigmaEffect_thetadegrees *
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 purpeateose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 // Class AliMUONCommonGeometryBuilder
19 // ----------------------------------
20 // Geometry construction common to all stations
21 // (material definition).
22 // separated from AliMUONGeometryBuilder
25 #include <TVirtualMC.h>
27 #include "AliMUONCommonGeometryBuilder.h"
33 ClassImp(AliMUONCommonGeometryBuilder)
35 //______________________________________________________________________________//___________________________________________
36 AliMUONCommonGeometryBuilder::AliMUONCommonGeometryBuilder(AliMUON* muon)
37 : AliMUONVGeometryBuilder("", 0),
40 // Standars constructor
43 //______________________________________________________________________________//___________________________________________
44 AliMUONCommonGeometryBuilder::AliMUONCommonGeometryBuilder()
45 : AliMUONVGeometryBuilder(),
48 // Default constructor
51 //______________________________________________________________________________
52 AliMUONCommonGeometryBuilder::AliMUONCommonGeometryBuilder(
53 const AliMUONCommonGeometryBuilder& right)
54 : AliMUONVGeometryBuilder(right)
56 // copy constructor (not implemented)
58 AliFatal("Copy constructor not provided.");
61 //______________________________________________________________________________
62 AliMUONCommonGeometryBuilder::~AliMUONCommonGeometryBuilder()
67 //______________________________________________________________________________
68 AliMUONCommonGeometryBuilder&
69 AliMUONCommonGeometryBuilder::operator=(const AliMUONCommonGeometryBuilder& right)
71 // assignement operator (not implemented)
73 // check assignement to self
74 if (this == &right) return *this;
76 AliFatal("Assignement operator not provided.");
85 //_____________________________________________________________________________
86 void AliMUONCommonGeometryBuilder::CreateMaterials()
88 // Definition of common materials
92 // Ar-CO2 gas (80%+20%)
93 Float_t ag1[3] = { 39.95,12.01,16. };
94 Float_t zg1[3] = { 18.,6.,8. };
95 Float_t wg1[3] = { .8,.0667,.13333 };
96 Float_t dg1 = .001821;
98 // Ar-buthane-freon gas -- trigger chambers
99 Float_t atr1[4] = { 39.95,12.01,1.01,19. };
100 Float_t ztr1[4] = { 18.,6.,1.,9. };
101 Float_t wtr1[4] = { .56,.1262857,.2857143,.028 };
102 Float_t dtr1 = .002599;
105 Float_t agas[3] = { 39.95,12.01,16. };
106 Float_t zgas[3] = { 18.,6.,8. };
107 Float_t wgas[3] = { .74,.086684,.173316 };
108 Float_t dgas = .0018327;
110 // Ar-Isobutane gas (80%+20%) -- tracking
111 Float_t ag[3] = { 39.95,12.01,1.01 };
112 Float_t zg[3] = { 18.,6.,1. };
113 Float_t wg[3] = { .8,.057,.143 };
114 Float_t dg = .0019596;
116 // Ar-Isobutane-Forane-SF6 gas (49%+7%+40%+4%) -- trigger
117 Float_t atrig[5] = { 39.95,12.01,1.01,19.,32.066 };
118 Float_t ztrig[5] = { 18.,6.,1.,9.,16. };
119 Float_t wtrig[5] = { .49,1.08,1.5,1.84,0.04 };
120 Float_t dtrig = .0031463;
123 Float_t abak[3] = {12.01 , 1.01 , 16.};
124 Float_t zbak[3] = {6. , 1. , 8.};
125 Float_t wbak[3] = {6. , 6. , 1.};
128 Int_t iSXFLD = gAlice->Field()->Integ();
129 Float_t sXMGMX = gAlice->Field()->Max();
131 // --- Define the various materials for GEANT ---
132 fMUON->AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
133 fMUON->AliMaterial(10, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
135 Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
136 Float_t zAir[4]={6.,7.,8.,18.};
137 Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
138 Float_t dAir = 1.20479E-3;
139 fMUON->AliMixture(15, "AIR$ ", aAir, zAir, dAir,4, wAir);
140 // fMUON->AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
141 fMUON->AliMixture(19, "Bakelite$", abak, zbak, dbak, -3, wbak);
142 fMUON->AliMixture(20, "ArC4H10 GAS$", ag, zg, dg, 3, wg);
143 fMUON->AliMixture(21, "TRIG GAS$", atrig, ztrig, dtrig, -5, wtrig);
144 fMUON->AliMixture(22, "ArCO2 80%$", ag1, zg1, dg1, 3, wg1);
145 fMUON->AliMixture(23, "Ar-freon $", atr1, ztr1, dtr1, 4, wtr1);
146 fMUON->AliMixture(24, "ArCO2 GAS$", agas, zgas, dgas, 3, wgas);
148 // materials for slat:
149 // Sensitive area: gas (already defined)
151 // insulating material: vetronite -> replacing by G10 Ch. Finck
152 // spacer: noryl Ch. Finck
153 // panel sandwich: carbon, nomex, carbon replacing rohacell by nomex Ch. Finck
155 // G10: SiO2(60%) + C8H14O4(40%)
156 Float_t aglass[5] = {12.01, 28.09, 16., 1.01, 16.};
157 Float_t zglass[5] = { 6., 14., 8., 1., 8.};
158 Float_t wglass[5] = { 0.22, 0.28, 0.32, 0.03, 0.15};
159 Float_t dglass = 1.7;
161 // rohacell: C9 H13 N1 O2
162 Float_t arohac[4] = {12.01, 1.01, 14.010, 16.};
163 Float_t zrohac[4] = { 6., 1., 7., 8.};
164 Float_t wrohac[4] = { 9., 13., 1., 2.};
165 Float_t drohac = 0.03;
167 // Nomex: C22 H10 N2 O5
168 Float_t aNomex[4] = {12.01, 1.01, 14.010, 16.};
169 Float_t zNomex[4] = { 6., 1., 7., 8.};
170 Float_t wNomex[4] = { 22., 10., 2., 5.};
171 Float_t dNomex = 0.024; //honey comb
172 Float_t dNomex2 = 1.43; //bulk material
175 // Noryl: C8 H8 O polyphenylene oxyde (di-methyl not sure)
176 Float_t aNoryl[3] = {12.01, 1.01, 16.};
177 Float_t zNoryl[3] = { 6., 1., 8.};
178 Float_t wNoryl[3] = { 8., 8., 1.};
179 Float_t dNoryl = 1.06;
181 fMUON->AliMaterial(31, "COPPER$", 63.54, 29., 8.96, 1.4, 0.);
182 fMUON->AliMixture( 32, "G10$", aglass, zglass, dglass, -5, wglass);
183 fMUON->AliMaterial(33, "Carbon$", 12.01, 6., 2.265, 18.8, 49.9);
184 fMUON->AliMixture( 34, "Rohacell$", arohac, zrohac, drohac, -4, wrohac);
185 fMUON->AliMixture( 35, "Nomex$", aNomex, zNomex, dNomex, -4, wNomex);
186 fMUON->AliMixture( 36, "Noryl$", aNoryl, zNoryl, dNoryl, -3, wNoryl);
187 fMUON->AliMixture( 37, "Nomex_bulk$",aNomex, zNomex, dNomex2, -4, wNomex);
189 Float_t epsil = .001; // Tracking precision,
190 Float_t stemax = -1.; // Maximum displacement for multiple scat
191 Float_t tmaxfd = -20.; // Maximum angle due to field deflection
192 Float_t deemax = -.3; // Maximum fractional energy loss, DLS
194 Float_t maxDestepAlu = fMUON->GetMaxDestepAlu();
195 Float_t maxDestepGas = fMUON->GetMaxDestepGas();
196 Float_t maxStepAlu = fMUON->GetMaxStepAlu();
197 Float_t maxStepGas = fMUON->GetMaxStepGas();
201 fMUON->AliMedium(1, "AIR_CH_US ", 15, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
205 fMUON->AliMedium(4, "ALU_CH_US ", 9, 0, iSXFLD, sXMGMX, tmaxfd, maxStepAlu,
206 maxDestepAlu, epsil, stmin);
207 fMUON->AliMedium(5, "ALU_CH_US ", 10, 0, iSXFLD, sXMGMX, tmaxfd, maxStepAlu,
208 maxDestepAlu, epsil, stmin);
211 fMUON->AliMedium(6, "AR_CH_US ", 20, 1, iSXFLD, sXMGMX, tmaxfd, maxStepGas,
212 maxDestepGas, epsil, stmin);
214 // Ar-Isobuthane-Forane-SF6 gas
215 fMUON->AliMedium(7, "GAS_CH_TRIGGER ", 21, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
217 fMUON->AliMedium(8, "BAKE_CH_TRIGGER ", 19, 0, iSXFLD, sXMGMX, tmaxfd, maxStepAlu,
218 maxDestepAlu, epsil, stmin);
221 fMUON->AliMedium(9, "ARG_CO2 ", 22, 1, iSXFLD, sXMGMX, tmaxfd, maxStepGas,
222 maxDestepAlu, epsil, stmin);
224 // tracking media for slats: check the parameters!!
225 fMUON->AliMedium(11, "PCB_COPPER ", 31, 0, iSXFLD, sXMGMX, tmaxfd,
226 maxStepAlu, maxDestepAlu, epsil, stmin);
227 fMUON->AliMedium(12, "G10 ", 32, 0, iSXFLD, sXMGMX, tmaxfd,
228 maxStepAlu, maxDestepAlu, epsil, stmin);
229 fMUON->AliMedium(13, "CARBON ", 33, 0, iSXFLD, sXMGMX, tmaxfd,
230 maxStepAlu, maxDestepAlu, epsil, stmin);
231 fMUON->AliMedium(14, "Rohacell ", 34, 0, iSXFLD, sXMGMX, tmaxfd,
232 maxStepAlu, maxDestepAlu, epsil, stmin);
233 fMUON->AliMedium(15, "Nomex ", 35, 0, iSXFLD, sXMGMX, tmaxfd,
234 maxStepAlu, maxDestepAlu, epsil, stmin);
235 fMUON->AliMedium(16, "Noryl ", 36, 0, iSXFLD, sXMGMX, tmaxfd,
236 maxStepAlu, maxDestepAlu, epsil, stmin);
237 fMUON->AliMedium(17, "Nomex bulk ", 37, 0, iSXFLD, sXMGMX, tmaxfd,
238 maxStepAlu, maxDestepAlu, epsil, stmin);