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7587f5a5 | 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 | //_________________________________________________________________________ | |
17 | // Manager class for PHOS version SUBATECH | |
18 | //*-- Author : Odd Harald Oddland & Gines Martinez Feb-2000 | |
19 | // The main goal of this version of AliPHOS is to calculted the | |
20 | // induced charged in the PIN diode, taking into account light | |
21 | // tracking in the PbWO4 crystal, induced signal in the | |
22 | // PIN due to MIPS particle and electronic noise. | |
23 | // In this respect, this class derived from AliPHOSv0 and | |
24 | // only the StepManager function has been "surcharged" | |
25 | ////////////////////////////////////////////////////////////////////////////// | |
26 | ||
27 | // --- ROOT system --- | |
28 | #include "TRandom.h" | |
29 | ||
30 | // --- Standard library --- | |
31 | ||
32 | #include <cstdio> | |
33 | #include <cstring> | |
34 | #include <cstdlib> | |
35 | #include <strstream> | |
36 | #include <cassert> | |
37 | ||
38 | // --- AliRoot header files --- | |
39 | ||
40 | #include "AliPHOSv1.h" | |
41 | #include "AliPHOSHit.h" | |
42 | #include "AliPHOSDigit.h" | |
43 | #include "AliRun.h" | |
44 | #include "AliConst.h" | |
45 | ||
46 | ClassImp(AliPHOSv1) | |
47 | ||
48 | //____________________________________________________________________________ | |
49 | AliPHOSv1::AliPHOSv1() : | |
50 | AliPHOSv0() | |
51 | { | |
52 | } | |
53 | ||
54 | //____________________________________________________________________________ | |
55 | AliPHOSv1::AliPHOSv1(const char *name, const char *title): | |
56 | AliPHOSv0(name,title) | |
57 | { | |
58 | fLightYieldMean = 700000. ; | |
59 | fIntrinsicPINEfficiency = 0.1875 ; | |
60 | fLightYieldAttenuation = 0.0045 ; | |
61 | fRecalibrationFactor = 6.2 / fLightYieldMean ; | |
62 | } | |
63 | //____________________________________________________________________________ | |
64 | AliPHOSv1::AliPHOSv1(AliPHOSReconstructioner * Reconstructioner, const char *name, const char *title): | |
65 | AliPHOSv0(Reconstructioner,name,title) | |
66 | { | |
67 | fLightYieldMean = 700000.; | |
68 | fIntrinsicPINEfficiency = 0.1875 ; | |
69 | fLightYieldAttenuation = 0.0045 ; | |
70 | fRecalibrationFactor = 6.2 / fLightYieldMean ; | |
71 | } | |
72 | ||
73 | //____________________________________________________________________________ | |
74 | AliPHOSv1::~AliPHOSv1() | |
75 | { | |
76 | ||
77 | } | |
78 | ||
79 | //____________________________________________________________________________ | |
80 | ||
81 | ||
82 | ||
83 | ||
84 | ||
85 | ||
86 | //____________________________________________________________________________ | |
87 | void AliPHOSv1::StepManager(void) | |
88 | { | |
89 | Int_t relid[4] ; // (box, layer, row, column) indices | |
90 | Float_t xyze[4] ; // position wrt MRS and energy deposited | |
91 | TLorentzVector pos ; | |
92 | Int_t copy; | |
93 | Float_t lightyield ; // Light Yield per GeV | |
94 | Float_t nElectrons ; // Number of electrons in the PIN diode | |
95 | TString name = fGeom->GetName() ; | |
96 | Float_t global[3] ; | |
97 | Float_t local[3] ; | |
98 | Float_t lostenergy ; | |
99 | ||
100 | if ( name == "GPS2" ) { // the CPV is a PPSD | |
101 | if( gMC->CurrentVolID(copy) == gMC->VolId("GCEL") ) | |
102 | // if( strcmp ( gMC->CurrentVolName(), "GCEL" ) == 0 ) // We are inside a gas cell | |
103 | { | |
104 | gMC->TrackPosition(pos) ; | |
105 | xyze[0] = pos[0] ; | |
106 | xyze[1] = pos[1] ; | |
107 | xyze[2] = pos[2] ; | |
108 | xyze[3] = gMC->Edep() ; | |
109 | ||
110 | ||
111 | if ( xyze[3] != 0 ) { // there is deposited energy | |
112 | gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number | |
113 | gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number | |
114 | // 1-> Geom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() upper | |
115 | // > fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() lower | |
116 | gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell | |
117 | gMC->CurrentVolID(relid[3]) ; // get the column number | |
118 | ||
119 | // get the absolute Id number | |
120 | ||
121 | Int_t absid ; | |
122 | fGeom->RelToAbsNumbering(relid,absid) ; | |
123 | ||
124 | ||
125 | AddHit(gAlice->CurrentTrack(), absid, xyze ); | |
126 | ||
127 | } // there is deposited energy | |
128 | } // We are inside the gas of the CPV | |
129 | } // GPS2 configuration | |
130 | ||
131 | if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) | |
132 | // if( strcmp ( gMC->CurrentVolName(), "PXTL" ) == 0 ) { // We are inside a PWO crystal | |
133 | { | |
134 | gMC->TrackPosition(pos) ; | |
135 | xyze[0] = pos[0] ; | |
136 | xyze[1] = pos[1] ; | |
137 | xyze[2] = pos[2] ; | |
138 | lostenergy = gMC->Edep() ; | |
139 | ||
140 | global[0] = pos[0] ; | |
141 | global[1] = pos[1] ; | |
142 | global[2] = pos[2] ; | |
143 | ||
144 | if ( xyze[3] != 0 ) { | |
145 | gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ; | |
146 | relid[1] = 0 ; // means PW04 | |
147 | gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module | |
148 | gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module | |
149 | ||
150 | // get the absolute Id number | |
151 | ||
152 | Int_t absid ; | |
153 | fGeom->RelToAbsNumbering(relid,absid) ; | |
154 | gMC->Gmtod(global, local, 1) ; | |
155 | ||
156 | // calculating number of electrons in the PIN diode asociated to this hit | |
157 | lightyield = gRandom->Poisson(fLightYieldMean) ; | |
158 | nElectrons = lostenergy * lightyield * fIntrinsicPINEfficiency * | |
159 | exp(-fLightYieldAttenuation * (local[1]+fGeom->GetCrystalSize(1)/2.0 ) ) ; | |
160 | ||
161 | xyze[3] = nElectrons * fRecalibrationFactor ; | |
162 | // add current hit to the hit list | |
163 | AddHit(gAlice->CurrentTrack(), absid, xyze); | |
164 | ||
165 | } // there is deposited energy | |
166 | } // we are inside a PHOS Xtal | |
167 | } | |
168 |