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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 | |