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f898e0f3 | 1 | /************************************************************************** |
2 | * Copyright(c) 2007, 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 | // Base class for the PHOS simulation parameters. | |
17 | // Do not use in the simulation; use derivative classes instead. | |
18 | // Author: Dmitri Peressounko, RRC KI | |
19 | ||
20 | // --- AliRoot header files --- | |
21 | #include "AliPHOSSimParam.h" | |
22 | #include "AliLog.h" | |
23 | ||
24 | ClassImp(AliPHOSSimParam) | |
25 | ||
26 | AliPHOSSimParam * AliPHOSSimParam::fgSimParam = 0 ; | |
27 | //----------------------------------------------------------------------------- | |
28 | AliPHOSSimParam::AliPHOSSimParam() : | |
29 | TNamed(), | |
30 | fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.), | |
31 | fLightFactor(0.),fAPDFactor(0.), | |
32 | fAPDNoise(0.),fEMCDigitThreshold(0.), | |
33 | fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.), | |
167d2780 | 34 | fFastDecalibration(0.), |
f898e0f3 | 35 | fADCpedestalCpv(0.),fADCchanelCpv(0.), |
36 | fCPVNoise(0.),fCPVDigitThreshold(0.),fNADCcpv(0), | |
37 | fDigitizeE(0) | |
38 | { | |
39 | //Default constructor. | |
40 | for(Int_t i=0; i<10; i++) fDStream[i] = 0 ; | |
41 | } | |
42 | ||
43 | //----------------------------------------------------------------------------- | |
44 | AliPHOSSimParam::AliPHOSSimParam(Int_t) : | |
45 | TNamed(), | |
46 | fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.), | |
47 | fLightFactor(0.),fAPDFactor(0.), | |
48 | fAPDNoise(0.),fEMCDigitThreshold(0.), | |
49 | fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.), | |
167d2780 | 50 | fFastDecalibration(0.), |
f898e0f3 | 51 | fADCpedestalCpv(0.),fADCchanelCpv(0.), |
52 | fCPVNoise(0.),fCPVDigitThreshold(0.),fNADCcpv(0), | |
53 | fDigitizeE(0) | |
54 | { | |
55 | //Real (private) constructor | |
56 | //Set default parameters | |
57 | ||
58 | //Parameters describing energy deposition and light collection by APD, used in AliPHOSv1 | |
59 | //Photoelectron statistics: | |
60 | // The light yield is a poissonian distribution of the number of | |
61 | // photons created in the PbWo4 crystal, calculated using following formula | |
62 | // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency | |
63 | // LightYieldMean is parameter calculated to be over 47000 photons per GeV | |
64 | // APDEfficiency is 0.02655 | |
65 | // k_0 is 0.0045 from Valery Antonenko | |
66 | // The number of electrons created in the APD is | |
67 | // NumberOfElectrons = APDGain * LightYield | |
68 | // The APD Gain is 300 | |
69 | fLightYieldMean = 47000; //Average number of photoelectrons per GeV | |
70 | fIntrinsicAPDEfficiency = 0.02655 ; //APD efficiency including geometric coverage | |
71 | // fLightYieldAttenuation = 0.0045 ; //light attenuation in PWO. Last analysis shows no z-position dependence | |
72 | // //so we removed this dependence from simulations | |
73 | fLightFactor = fLightYieldMean * fIntrinsicAPDEfficiency ; //Average number of photons collected by | |
74 | //APD per GeV deposited energy | |
75 | fAPDFactor = (13.418/fLightYieldMean/100.) * 300. ; //factor relating light yield and APD response | |
76 | //evaluated as (13.418/fLightYieldMean/100) * APDGain ; | |
77 | ||
78 | ||
79 | //Parameters defining electronic noise calculation and Digits noise thresholds | |
80 | //used in AliPHOSDigitizer | |
81 | fAPDNoise = 0.004 ; // [GeV] | |
82 | fEMCDigitThreshold = 0.012 ; // [GeV] | |
83 | fEMCADCchannel = 0.005 ; // [GeV] | |
84 | fTOFa = 0.5e-9 ; // [sec] constant term | |
85 | fTOFb = 1.e-9 ; // [sec/sqrt(GeV)]] stohastic term | |
86 | ||
167d2780 | 87 | fFastDecalibration = 0. ; //Relative decalibration. By default there is no decalibration |
88 | ||
f898e0f3 | 89 | fADCpedestalCpv = 0.012 ; // [aux units] |
90 | fADCchanelCpv = 0.0012; // [aux units] | |
91 | fCPVNoise = 0.01; // [aux units] | |
92 | fCPVDigitThreshold = 0.09 ; // [aux units] | |
93 | fNADCcpv = (Int_t)TMath::Power(2,12) ; | |
94 | ||
95 | //Imput streams for merging. If true => this stream contains digits (and thus noise) and not SDigits. | |
96 | for(Int_t i=0; i<10; i++){ | |
97 | fDStream[i] = 0 ; | |
98 | } | |
99 | fgSimParam = this ; | |
100 | } | |
101 | ||
102 | //----------------------------------------------------------------------------- | |
103 | AliPHOSSimParam::AliPHOSSimParam(const AliPHOSSimParam& ): | |
104 | TNamed(), | |
105 | fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.), | |
106 | fLightFactor(0.),fAPDFactor(0.), | |
107 | fAPDNoise(0.),fEMCDigitThreshold(0.), | |
108 | fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.), | |
167d2780 | 109 | fFastDecalibration(0.), |
f898e0f3 | 110 | fADCpedestalCpv(0.),fADCchanelCpv(0.), |
111 | fCPVNoise(0.),fCPVDigitThreshold(0.),fNADCcpv(0), | |
112 | fDigitizeE(0) | |
113 | { | |
114 | //Copy constructor. | |
115 | AliError("Should not use copy constructor for singleton") ; | |
116 | for(Int_t i=0; i<10; i++){ | |
117 | fDStream[i] = 0 ; | |
118 | } | |
119 | fgSimParam = this ; | |
120 | } | |
121 | //----------------------------------------------------------------------------- | |
122 | AliPHOSSimParam * AliPHOSSimParam::GetInstance(){ | |
123 | ||
124 | if(!fgSimParam) | |
125 | new AliPHOSSimParam(0) ; | |
126 | return fgSimParam ; | |
127 | } | |
128 | //----------------------------------------------------------------------------- | |
129 | AliPHOSSimParam& AliPHOSSimParam::operator = (const AliPHOSSimParam& simParam) | |
130 | { | |
131 | //Assignment operator. | |
132 | ||
133 | if(this != &simParam) { | |
134 | AliError("Should not use operator= for singleton\n") ; | |
135 | } | |
136 | ||
137 | return *this; | |
138 | } | |
139 |