Introduction of decalibration in the simulations with anchor runs and raw:// OCDB.
[u/mrichter/AliRoot.git] / PHOS / AliPHOSSimParam.cxx
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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
24ClassImp(AliPHOSSimParam)
25
26AliPHOSSimParam * AliPHOSSimParam::fgSimParam = 0 ;
27//-----------------------------------------------------------------------------
28AliPHOSSimParam::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.),
c46b6a59 34 fEMCSubtractPedestals(kFALSE),
35 fGlobalAltroOffset(0),fGlobalAltroThreshold(0),fEMCSampleQualityCut(0),
f898e0f3 36 fADCpedestalCpv(0.),fADCchanelCpv(0.),
37 fCPVNoise(0.),fCPVDigitThreshold(0.),fNADCcpv(0),
38 fDigitizeE(0)
39{
40 //Default constructor.
41 for(Int_t i=0; i<10; i++) fDStream[i] = 0 ;
42}
43
44//-----------------------------------------------------------------------------
45AliPHOSSimParam::AliPHOSSimParam(Int_t) :
46 TNamed(),
47 fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.),
48 fLightFactor(0.),fAPDFactor(0.),
49 fAPDNoise(0.),fEMCDigitThreshold(0.),
50 fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.),
c46b6a59 51 fEMCSubtractPedestals(kFALSE),
52 fGlobalAltroOffset(0),fGlobalAltroThreshold(0),fEMCSampleQualityCut(0),
f898e0f3 53 fADCpedestalCpv(0.),fADCchanelCpv(0.),
5024fc61 54 fCPVNoise(0.),fCPVDigitThreshold(0.),
55 fNADCcpv(0),
f898e0f3 56 fDigitizeE(0)
57{
58 //Real (private) constructor
59 //Set default parameters
60
61 //Parameters describing energy deposition and light collection by APD, used in AliPHOSv1
62 //Photoelectron statistics:
63 // The light yield is a poissonian distribution of the number of
64 // photons created in the PbWo4 crystal, calculated using following formula
65 // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency
66 // LightYieldMean is parameter calculated to be over 47000 photons per GeV
67 // APDEfficiency is 0.02655
68 // k_0 is 0.0045 from Valery Antonenko
69 // The number of electrons created in the APD is
70 // NumberOfElectrons = APDGain * LightYield
71 // The APD Gain is 300
72 fLightYieldMean = 47000; //Average number of photoelectrons per GeV
73 fIntrinsicAPDEfficiency = 0.02655 ; //APD efficiency including geometric coverage
74// fLightYieldAttenuation = 0.0045 ; //light attenuation in PWO. Last analysis shows no z-position dependence
75// //so we removed this dependence from simulations
76 fLightFactor = fLightYieldMean * fIntrinsicAPDEfficiency ; //Average number of photons collected by
77 //APD per GeV deposited energy
78 fAPDFactor = (13.418/fLightYieldMean/100.) * 300. ; //factor relating light yield and APD response
79 //evaluated as (13.418/fLightYieldMean/100) * APDGain ;
80
81
82 //Parameters defining electronic noise calculation and Digits noise thresholds
83 //used in AliPHOSDigitizer
84 fAPDNoise = 0.004 ; // [GeV]
5024fc61 85 fEMCDigitThreshold = 2.5 ; // [ADC counts]
f898e0f3 86 fEMCADCchannel = 0.005 ; // [GeV]
87 fTOFa = 0.5e-9 ; // [sec] constant term
88 fTOFb = 1.e-9 ; // [sec/sqrt(GeV)]] stohastic term
89
90 fADCpedestalCpv = 0.012 ; // [aux units]
91 fADCchanelCpv = 0.0012; // [aux units]
92 fCPVNoise = 0.01; // [aux units]
93 fCPVDigitThreshold = 0.09 ; // [aux units]
94 fNADCcpv = (Int_t)TMath::Power(2,12) ;
95
c46b6a59 96 fGlobalAltroOffset = 10;
97 fGlobalAltroThreshold = 5;
98 fEMCSampleQualityCut = 4.;
99
f898e0f3 100 //Imput streams for merging. If true => this stream contains digits (and thus noise) and not SDigits.
101 for(Int_t i=0; i<10; i++){
102 fDStream[i] = 0 ;
103 }
104 fgSimParam = this ;
105}
106
107//-----------------------------------------------------------------------------
108AliPHOSSimParam::AliPHOSSimParam(const AliPHOSSimParam& ):
109 TNamed(),
110 fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.),
111 fLightFactor(0.),fAPDFactor(0.),
112 fAPDNoise(0.),fEMCDigitThreshold(0.),
113 fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.),
c46b6a59 114 fEMCSubtractPedestals(kFALSE),
115 fGlobalAltroOffset(0),fGlobalAltroThreshold(0),fEMCSampleQualityCut(1.),
f898e0f3 116 fADCpedestalCpv(0.),fADCchanelCpv(0.),
117 fCPVNoise(0.),fCPVDigitThreshold(0.),fNADCcpv(0),
118 fDigitizeE(0)
119{
120 //Copy constructor.
121 AliError("Should not use copy constructor for singleton") ;
122 for(Int_t i=0; i<10; i++){
123 fDStream[i] = 0 ;
124 }
125 fgSimParam = this ;
126}
127//-----------------------------------------------------------------------------
128AliPHOSSimParam * AliPHOSSimParam::GetInstance(){
129
130 if(!fgSimParam)
131 new AliPHOSSimParam(0) ;
132 return fgSimParam ;
133}
134//-----------------------------------------------------------------------------
135AliPHOSSimParam& AliPHOSSimParam::operator = (const AliPHOSSimParam& simParam)
136{
137 //Assignment operator.
138
139 if(this != &simParam) {
140 AliError("Should not use operator= for singleton\n") ;
141 }
142
143 return *this;
144}
145