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 //_________________________________________________________________________
19 // Base Class for EMCAL description:
20 // This class contains material definitions
21 // for the EMCAL - It does not place the detector in Alice
22 //*-- Author: Yves Schutz (SUBATECH)
24 //*-- Additional Contributions: Sahal Yacoob (LBNL/UCT)
26 //////////////////////////////////////////////////////////////////////////////
28 // --- ROOT system ---
32 #include <TVirtualMC.h>
34 // --- Standard library ---
36 // --- AliRoot header files ---
39 #include "AliEMCALGeometry.h"
40 #include "AliEMCALLoader.h"
42 #include "AliEMCALSDigitizer.h"
43 #include "AliEMCALDigitizer.h"
46 //____________________________________________________________________________
47 AliEMCAL::AliEMCAL():AliDetector()
54 //____________________________________________________________________________
55 AliEMCAL::AliEMCAL(const char* name, const char* title): AliDetector(name,title)
57 // ctor : title is used to identify the layout
61 //____________________________________________________________________________
67 //____________________________________________________________________________
68 void AliEMCAL::CreateMaterials()
70 // Definitions of materials to build EMCAL and associated tracking media.
71 // media number in idtmed are 1599 to 1698.
74 AliMaterial(0, "Air$", 14.61, 7.3, 0.001205, 30420., 67500., 0, 0) ;
78 AliMaterial(1, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;
81 // --- The polysterene scintillator (CH) ---
82 Float_t aP[2] = {12.011, 1.00794} ;
83 Float_t zP[2] = {6.0, 1.0} ;
84 Float_t wP[2] = {1.0, 1.0} ;
87 AliMixture(2, "Polystyrene$", aP, zP, dP, -2, wP) ;
90 AliMaterial(3, "Al$", 26.98, 13., 2.7, 8.9, 999., 0, 0) ;
91 // --- Absorption length is ignored ^
93 // DEFINITION OF THE TRACKING MEDIA
95 // for EMCAL: idtmed[1599->1698] equivalent to fIdtmed[0->100]
96 Int_t * idtmed = fIdtmed->GetArray() - 1599 ;
97 Int_t isxfld = gAlice->Field()->Integ() ;
98 Float_t sxmgmx = gAlice->Field()->Max() ;
102 // Air -> idtmed[1599]
103 AliMedium(0, "Air $", 0, 0,
104 isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
106 // The Lead -> idtmed[1600]
108 AliMedium(1, "Lead $", 1, 0,
109 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
111 // The scintillator of the CPV made of Polystyrene scintillator -> idtmed[1601]
112 AliMedium(2, "CPV scint. $", 2, 1,
113 isxfld, sxmgmx, 10.0, 0.001, 0.1, 0.001, 0.001, 0, 0) ;
115 // Various Aluminium parts made of Al -> idtmed[1602]
116 AliMedium(3, "Al parts $", 3, 0,
117 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.001, 0.001, 0, 0) ;
120 // --- Set decent energy thresholds for gamma and electron tracking
122 // Tracking threshold for photons and electrons in Lead
123 gMC->Gstpar(idtmed[1600],"CUTGAM",0.00008) ;
124 gMC->Gstpar(idtmed[1600],"CUTELE",0.001) ;
125 gMC->Gstpar(idtmed[1600],"BCUTE",0.0001) ;
127 // --- Generate explicitly delta rays in Lead ---
128 gMC->Gstpar(idtmed[1600], "LOSS",3.) ;
129 gMC->Gstpar(idtmed[1600], "DRAY",1.) ;
130 gMC->Gstpar(idtmed[1600], "DCUTE",0.00001) ;
131 gMC->Gstpar(idtmed[1600], "DCUTM",0.00001) ;
133 // --- in aluminium parts ---
134 gMC->Gstpar(idtmed[1602], "LOSS",3.) ;
135 gMC->Gstpar(idtmed[1602], "DRAY",1.) ;
136 gMC->Gstpar(idtmed[1602], "DCUTE",0.00001) ;
137 gMC->Gstpar(idtmed[1602], "DCUTM",0.00001) ;
139 // --- and finally thresholds for photons and electrons in the scintillator ---
140 gMC->Gstpar(idtmed[1601],"CUTGAM",0.00008) ;
141 gMC->Gstpar(idtmed[1601],"CUTELE",0.001) ;
142 gMC->Gstpar(idtmed[1601],"BCUTE",0.0001) ;
146 //____________________________________________________________________________
147 AliEMCALGeometry * AliEMCAL::GetGeometry() const
149 // gets the pointer to the AliEMCALGeometry unique instance
154 return AliEMCALGeometry::GetInstance(GetTitle(),"") ;
157 //____________________________________________________________________________
158 void AliEMCAL::SetTreeAddress()
160 // Linking Hits in Tree to Hits array
163 sprintf(branchname,"%s",GetName());
165 // Branch address for hit tree
166 TTree *treeH = TreeH();
168 branch = treeH->GetBranch(branchname);
172 fHits= new TClonesArray("AliEMCALHit",1000);
173 branch->SetAddress(&fHits);
177 Warning("SetTreeAddress","<%s> Failed",GetName());
182 //____________________________________________________________________________
183 AliLoader* AliEMCAL::MakeLoader(const char* topfoldername)
185 //different behaviour than standard (singleton getter)
186 // --> to be discussed and made eventually coherent
187 fLoader = new AliEMCALLoader(GetName(),topfoldername);
191 //____________________________________________________________________________
192 void AliEMCAL::Hits2SDigits()
194 // create summable digits
196 AliEMCALSDigitizer* emcalDigitizer =
197 new AliEMCALSDigitizer(fLoader->GetRunLoader()->GetFileName().Data());
198 emcalDigitizer->ExecuteTask();
201 //____________________________________________________________________________
202 AliDigitizer* AliEMCAL::CreateDigitizer(AliRunDigitizer* manager) const
204 return new AliEMCALDigitizer(manager);