introducing the US EM calorimeter
[u/mrichter/AliRoot.git] / EMCAL / AliEMCAL.cxx
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2012850d 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
16/* $Id$ */
17
18//_________________________________________________________________________
19// Base Class for EMCAL description:
20//
21//
22//*-- Author: Yves Schutz (SUBATECH)
23//////////////////////////////////////////////////////////////////////////////
24
25// --- Standard library ---
26#include <strstream.h>
27
28// --- ROOT system ---
29#include "TBranch.h"
30#include "TClonesArray.h"
31#include "TTree.h"
32
33// --- AliRoot header files ---
34
35#include "AliEMCAL.h"
36#include "AliEMCALGeometry.h"
37#include "AliMC.h"
38#include "AliRun.h"
39#include "AliMagF.h"
40
41ClassImp(AliEMCAL)
42
43//____________________________________________________________________________
44AliEMCAL::AliEMCAL():AliDetector()
45{
46 // ctor
47 //We do not create objects, because these pointers will be overwritten during reading from file.
48 fSDigits = 0 ;
49}
50//____________________________________________________________________________
51AliEMCAL::AliEMCAL(const char* name, const char* title): AliDetector(name,title)
52{
53 // ctor : title is used to identify the layout
54
55 // gets an instance of the geometry parameters class
56
57 if (strcmp(GetTitle(),"") != 0 )
58 fGeom = AliEMCALGeometry::GetInstance(GetTitle(), "") ;
59}
60//____________________________________________________________________________
61AliEMCAL::~AliEMCAL()
62{
63 // dtor
64
65}
66
67//____________________________________________________________________________
68void AliEMCAL::CreateMaterials()
69{
70 // Definitions of materials to build EMCAL and associated tracking media.
71 // media number in idtmed are 1599 to 1698.
72
73 // --- Air ---
74 AliMaterial(0, "Air$", 14.61, 7.3, 0.001205, 30420., 67500., 0, 0) ;
75
76 // --- Lead ---
77 AliMaterial(1, "Pb$", 207.2, 82, 11.35, 0.56, 0., 0, 0) ;
78
79 // --- Average properties of the active material ---
80 AliMaterial(2, "EmcalMat$", fGeom->GetAmat(),
81 fGeom->GetZmat(),
82 fGeom->GetDmat(),
83 fGeom->GetRmat(),
84 0) ;
85
86 // DEFINITION OF THE TRACKING MEDIA
87
88 // for EMCAL: idtmed[1599->1698] equivalent to fIdtmed[0->100]
89 Int_t * idtmed = fIdtmed->GetArray() - 1599 ;
90 Int_t isxfld = gAlice->Field()->Integ() ;
91 Float_t sxmgmx = gAlice->Field()->Max() ;
92
93 // Air -> idtmed[1599]
94 AliMedium(0, "Air $", 0, 0,
95 isxfld, sxmgmx, 10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
96
97 // The Lead -> idtmed[1600]
98
99 AliMedium(1, "Lead $", 1, 0,
100 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
101
102 // The Average properties of the active material -> idtmed[1601]
103
104 AliMedium(2, "EmcalMat $", 2, 0,
105 isxfld, sxmgmx, 10.0, 0.1, 0.1, 0.1, 0.1, 0, 0) ;
106
107 // --- Set decent energy thresholds for gamma and electron tracking
108
109 // Tracking threshold for photons and electrons in Lead
110 gMC->Gstpar(idtmed[1600], "CUTGAM",0.5E-4) ;
111 gMC->Gstpar(idtmed[1600], "CUTELE",1.0E-4) ;
112 gMC->Gstpar(idtmed[1601], "CUTGAM",0.5E-4) ;
113 gMC->Gstpar(idtmed[1601], "CUTELE",1.0E-4) ;
114
115 // --- Generate explicitly delta rays in Lead ---
116 gMC->Gstpar(idtmed[1600], "LOSS",3.) ;
117 gMC->Gstpar(idtmed[1600], "DRAY",1.) ;
118 gMC->Gstpar(idtmed[1601], "LOSS",3.) ;
119 gMC->Gstpar(idtmed[1601], "DRAY",1.) ;
120
121}
122//____________________________________________________________________________
123void AliEMCAL::SetTreeAddress()
124{
125
126 TBranch *branch;
127 char branchname[20];
128 sprintf(branchname,"%s",GetName());
129
130 // Branch address for hit tree
131 TTree *treeH = gAlice->TreeH();
132 if (treeH && fHits) {
133 branch = treeH->GetBranch(branchname);
134 if (branch) branch->SetAddress(&fHits);
135 }
136
137 // Branch address for digit tree
138 TTree *treeD = gAlice->TreeD();
139
140 if(fDigits)
141 fDigits->Clear();
142
143 if (treeD && fDigits) {
144 branch = treeD->GetBranch(branchname);
145 if (branch) branch->SetAddress(&fDigits);
146 }
147
148 if(fSDigits)
149 fSDigits->Clear();
150
151 if (gAlice->TreeS() && fSDigits ) {
152 branch = gAlice->TreeS()->GetBranch("EMCAL");
153 if (branch) branch->SetAddress(&fSDigits) ;
154 }
155}
156
157