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 ///////////////////////////////////////////////////////////////////////////////
20 // Cosmic Rays ALICE Trigger //
21 // This class contains the basic functions for the Cosmic Ray ALICE //
22 // detector. Functions specific to one particular geometry are //
23 // contained in the derived classes //
27 <img src="picts/AliCRTClass.gif">
29 <p>The responsible person for this module is
30 <a href="mailto:Enrique.Gamez.Flores@cern.ch">Enrique Gamez Flores</a>.
38 ///////////////////////////////////////////////////////////////////////////////
49 //_____________________________________________________________________________
54 // Default constructor
58 //_____________________________________________________________________________
59 AliCRT::AliCRT(const char *name, const char *title)
60 : AliDetector(name, title)
63 // Standard constructor
67 //_____________________________________________________________________________
68 AliCRT::AliCRT(const AliCRT& crt)
77 //_____________________________________________________________________________
85 //_____________________________________________________________________________
86 AliCRT& AliCRT::operator=(const AliCRT& crt)
89 // Asingment operator.
95 //_____________________________________________________________________________
96 void AliCRT::CreateMaterials()
98 // Magnatic field inside the pit
99 Int_t isxfld = gAlice->Field()->Integ();
100 Float_t sxmgmx = gAlice->Field()->Max();
102 //Magnetic field above the Magnet.
103 Int_t xfield = 0; // no Magnetic field.
105 Float_t xepsil = 0.1; // Tracking precission in cm. obove the pit
107 // --- Define the various materials for GEANT ---
108 Float_t epsil, stmin, tmaxfd, deemax, stemax;
111 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
112 AliMaterial(29, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
113 AliMaterial(49, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
116 AliMaterial(10, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
117 AliMaterial(30, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
118 AliMaterial(50, "IRON$ ", 55.85, 26., 7.87, 1.76, 17.1);
121 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
122 AliMaterial(35, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
123 AliMaterial(55, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
124 AliMaterial(75, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
125 AliMaterial(95, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500.);
128 // Scintillator material polystyrene
129 Float_t aP[2] = {12.011, 1.00794};
130 Float_t zP[2] = {6.0, 1.0};
131 Float_t wP[2] = {1.0, 1.0};
133 AliMixture(13, "Polystyrene$", aP, zP, dP, -2, wP);
134 // Subalpine Molasse over the ALICE hall.
135 Float_t aMolasse[10] = { 1., 12.01, 15.994, 22.99, 24.305, 26.98, 28.086, 39.1, 40.08, 55.85 };
136 Float_t zMolasse[10] = {1., 6., 8., 11., 12., 13., 14., 19., 20., 26.};
137 Float_t wMolasse[10] = {0.008, 0.043, 0.485, 0.007, 0.042, 0.037, 0.215, 0.023, 0.1, 0.04};
138 Float_t dMolasse = 2.40;
139 AliMixture(24, "Molasse$", aMolasse, zMolasse, dMolasse, 10, wMolasse);
142 // Defines tracking media parameters.
143 // Les valeurs sont commentees pour laisser le defaut
144 // a GEANT (version 3-21, page CONS200), f.m.
145 epsil = .001; // Tracking precision, Inside the pit
146 stemax = -1.; // Maximum displacement for multiple scattering
147 tmaxfd = -20.; // Maximum angle due to field deflection
148 deemax = -.3; // Maximum fractional energy loss, DLS
152 Float_t atmaxfd = 10.;
153 Float_t adeemax = -0.1;
154 Float_t aepsil = 0.1;
155 Float_t astmin = -10.;
159 AliMedium(9, "ALU_C0 ", 9, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
160 AliMedium(29, "ALU_C1 ", 29, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
161 AliMedium(49, "ALU_C2 ", 49, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
164 AliMedium(10, "FE_C0 ", 10, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
165 AliMedium(30, "FE_C1 ", 30, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
166 AliMedium(50, "FE_C2 ", 50, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
169 AliMedium(15, "AIR_C0 ", 15, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
170 AliMedium(35, "AIR_C1 ", 35, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
171 AliMedium(55, "AIR_C2 ", 55, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
172 AliMedium(75, "AIR_C4 ", 75, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
173 AliMedium(95, "AIR_C5 ", 95, 0, isxfld, sxmgmx, atmaxfd, stemax, adeemax, aepsil, astmin);
177 // The scintillator of the CPV made of Polystyrene
178 // scintillator -> idtmed[1112]
179 AliMedium(12 , "CPV scint. ", 13, 1, isxfld, sxmgmx, 10., stemax, deemax, epsil, stmin);
180 AliMedium(13 , "CPV scint. ", 13, 1, isxfld, sxmgmx, 10., stemax, deemax, epsil, stmin);
181 AliMedium(14 , "CPV scint. ", 13, 1, isxfld, sxmgmx, 10., stemax, deemax, epsil, stmin);
183 // Molasse -> idtmed[1123]
184 AliMedium(24 , "Molasse ", 24, 0, xfield, xfieldm, tmaxfd, stemax, deemax, xepsil, stmin);
186 // Concrete, in case if we need to put hte shafts by ourselves.
188 Float_t aconc[10] = { 1.,12.01,15.994,22.99,24.305,26.98,28.086,39.1,40.08,55.85 };
189 Float_t zconc[10] = { 1.,6.,8.,11.,12.,13.,14.,19.,20.,26. };
190 Float_t wconc[10] = { .01,.001,.529107,.016,.002,.033872,.337021,.013,.044,.014 };
192 AliMixture(17, "CONCRETE$", aconc, zconc, 2.35, 10, wconc);
194 AliMedium(17, "CC_C0 ", 17, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
195 AliMedium(27, "CC_C1 ", 17, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin); // MX24
196 AliMedium(37, "CC_C2 ", 17, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin); // PM25
197 AliMedium(47, "CC_C3 ", 17, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin); // PGC2
201 //_____________________________________________________________________________
202 void AliCRT::SetTreeAddress()
207 sprintf(branchname,"%s",GetName());
209 // Branch address for hit tree
210 TTree *treeH = fLoader->TreeH();
211 if (treeH && fHits) {
212 branch = treeH->GetBranch(branchname);
213 if (branch) branch->SetAddress(&fHits);