1 /**************************************************************************
2 * Copyright(c) 2007, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
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
20 // --- AliRoot header files ---
21 #include "AliPHOSSimParam.h"
24 ClassImp(AliPHOSSimParam)
26 AliPHOSSimParam * AliPHOSSimParam::fgSimParam = 0 ;
27 //-----------------------------------------------------------------------------
28 AliPHOSSimParam::AliPHOSSimParam() :
30 fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.),
31 fLightFactor(0.),fAPDFactor(0.),
32 fAPDNoise(0.),fEMCDigitThreshold(0.),
33 fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.),
34 fCellNonLineaityA(0.),fCellNonLineaityB(1.),fCellNonLineaityC(1.),
35 fEMCSubtractPedestals(kFALSE),
36 fGlobalAltroOffset(0),fGlobalAltroThreshold(0),fEMCSampleQualityCut(0),
37 fADCpedestalCpv(0.),fADCchanelCpv(0.),
38 fCPVNoise(0.),fCPVDigitThreshold(0.),fNADCcpv(0),
39 fDigitizeE(0),fCellNonLineaityOn(1)
41 //Default constructor.
42 for(Int_t i=0; i<10; i++) fDStream[i] = 0 ;
45 //-----------------------------------------------------------------------------
46 AliPHOSSimParam::AliPHOSSimParam(Int_t) :
48 fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.),
49 fLightFactor(0.),fAPDFactor(0.),
50 fAPDNoise(0.),fEMCDigitThreshold(0.),
51 fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.),
52 fCellNonLineaityA(0.),fCellNonLineaityB(1.),fCellNonLineaityC(1.),
53 fEMCSubtractPedestals(kFALSE),
54 fGlobalAltroOffset(0),fGlobalAltroThreshold(0),fEMCSampleQualityCut(0),
55 fADCpedestalCpv(0.),fADCchanelCpv(0.),
56 fCPVNoise(0.),fCPVDigitThreshold(0.),
58 fDigitizeE(0),fCellNonLineaityOn(1)
60 //Real (private) constructor
61 //Set default parameters
63 //Parameters describing energy deposition and light collection by APD, used in AliPHOSv1
64 //Photoelectron statistics:
65 // The light yield is a poissonian distribution of the number of
66 // photons created in the PbWo4 crystal, calculated using following formula
67 // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency
68 // LightYieldMean is parameter calculated to be over 47000 photons per GeV
69 // APDEfficiency is 0.02655
70 // k_0 is 0.0045 from Valery Antonenko
71 // The number of electrons created in the APD is
72 // NumberOfElectrons = APDGain * LightYield
73 // The APD Gain is 300
74 fLightYieldMean = 47000; //Average number of photoelectrons per GeV
75 fIntrinsicAPDEfficiency = 0.02655 ; //APD efficiency including geometric coverage
76 // fLightYieldAttenuation = 0.0045 ; //light attenuation in PWO. Last analysis shows no z-position dependence
77 // //so we removed this dependence from simulations
78 fLightFactor = fLightYieldMean * fIntrinsicAPDEfficiency ; //Average number of photons collected by
79 //APD per GeV deposited energy
80 fAPDFactor = (13.418/fLightYieldMean/100.) * 300. ; //factor relating light yield and APD response
81 //evaluated as (13.418/fLightYieldMean/100) * APDGain ;
84 //Parameters defining electronic noise calculation and Digits noise thresholds
85 //used in AliPHOSDigitizer
86 fAPDNoise = 0.004 ; // [GeV]
87 fEMCDigitThreshold = 2.5 ; // [ADC counts]
88 fEMCADCchannel = 0.005 ; // [GeV]
89 fTOFa = 0.5e-9 ; // [sec] constant term
90 fTOFb = 1.e-9 ; // [sec/sqrt(GeV)]] stohastic term
91 fCellNonLineaityA = 0.18 ; //Amp of non-linearity of cell responce
92 fCellNonLineaityB = 0.109; //Scale of non-linearity of cell responce
93 fCellNonLineaityC = 0.976; //Overall calibration
95 fADCpedestalCpv = 0.012 ; // [aux units]
96 fADCchanelCpv = 0.0012; // [aux units]
97 fCPVNoise = 0.01; // [aux units]
98 fCPVDigitThreshold = 0.09 ; // [aux units]
99 fNADCcpv = (Int_t)TMath::Power(2,12) ;
101 fGlobalAltroOffset = 10;
102 fGlobalAltroThreshold = 5;
103 fEMCSampleQualityCut = 4.;
105 //Imput streams for merging. If true => this stream contains digits (and thus noise) and not SDigits.
106 for(Int_t i=0; i<10; i++){
112 //-----------------------------------------------------------------------------
113 AliPHOSSimParam::AliPHOSSimParam(const AliPHOSSimParam& ):
115 fLightYieldMean(0.),fIntrinsicAPDEfficiency(0.),
116 fLightFactor(0.),fAPDFactor(0.),
117 fAPDNoise(0.),fEMCDigitThreshold(0.),
118 fEMCADCchannel(0.),fTOFa(0.),fTOFb(0.),
119 fCellNonLineaityA(0.),fCellNonLineaityB(1.),fCellNonLineaityC(1.),
120 fEMCSubtractPedestals(kFALSE),
121 fGlobalAltroOffset(0),fGlobalAltroThreshold(0),fEMCSampleQualityCut(1.),
122 fADCpedestalCpv(0.),fADCchanelCpv(0.),
123 fCPVNoise(0.),fCPVDigitThreshold(0.),fNADCcpv(0),
124 fDigitizeE(0),fCellNonLineaityOn(1)
127 AliError("Should not use copy constructor for singleton") ;
128 for(Int_t i=0; i<10; i++){
133 //-----------------------------------------------------------------------------
134 AliPHOSSimParam * AliPHOSSimParam::GetInstance(){
137 new AliPHOSSimParam(0) ;
140 //-----------------------------------------------------------------------------
141 AliPHOSSimParam& AliPHOSSimParam::operator = (const AliPHOSSimParam& simParam)
143 //Assignment operator.
145 if(this != &simParam) {
146 AliError("Should not use operator= for singleton\n") ;