/************************************************************************** * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * about the suitability of this software for any purpose. It is * * provided "as is" without express or implied warranty. * **************************************************************************/ /* $Id$ */ //////////////////////////////////////////////////////////////////////////// // // // Class containing constant simulation parameters // // // // Request an instance with AliTRDSimParam::Instance() // // Then request the needed values // // // //////////////////////////////////////////////////////////////////////////// #include #include "AliRun.h" #include "AliTRDSimParam.h" #include "AliTRDCommonParam.h" ClassImp(AliTRDSimParam) AliTRDSimParam *AliTRDSimParam::fgInstance = 0; Bool_t AliTRDSimParam::fgTerminated = kFALSE; //_ singleton implementation __________________________________________________ AliTRDSimParam* AliTRDSimParam::Instance() { // // Singleton implementation // Returns an instance of this class, it is created if neccessary // if (fgTerminated != kFALSE) { return 0; } if (fgInstance == 0) { fgInstance = new AliTRDSimParam(); } return fgInstance; } //_ singleton implementation __________________________________________________ void AliTRDSimParam::Terminate() { // // Singleton implementation // Deletes the instance of this class and sets the terminated flag, // instances cannot be requested anymore // This function can be called several times. // fgTerminated = kTRUE; if (fgInstance != 0) { delete fgInstance; fgInstance = 0; } } //_____________________________________________________________________________ AliTRDSimParam::AliTRDSimParam() :TObject() ,fGasGain(0.0) ,fNoise(0.0) ,fChipGain(0.0) ,fADCoutRange(0.0) ,fADCinRange(0.0) ,fADCbaseline(0) ,fDiffusionOn(kFALSE) ,fElAttachOn(kFALSE) ,fElAttachProp(0.0) ,fTRFOn(kFALSE) ,fTRFsmp(0) ,fTRFbin(0) ,fTRFlo(0.0) ,fTRFhi(0.0) ,fTRFwid(0.0) ,fCTOn(kFALSE) ,fCTsmp(0) ,fPadCoupling(0.0) ,fTimeCoupling(0.0) ,fTimeStructOn(kFALSE) ,fPRFOn(kFALSE) { // // Default constructor // Init(); } //_____________________________________________________________________________ void AliTRDSimParam::Init() { // // Default initializiation // // The default parameter for the digitization fGasGain = 4000.0; fChipGain = 12.4; fNoise = 1250.0; fADCoutRange = 1023.0; // 10-bit ADC fADCinRange = 2000.0; // 2V input range // Go back to 0 again, just to be consistent with reconstruction fADCbaseline = 0; //fADCbaseline = 10; // Diffusion on fDiffusionOn = kTRUE; // Propability for electron attachment fElAttachOn = kFALSE; fElAttachProp = 0.0; // The time response function fTRFOn = kTRUE; // The cross talk fCTOn = kTRUE; // The pad coupling factor // Use 0.46, instead of the theroetical value 0.3, since it reproduces better // the test beam data, even tough it is not understood why. fPadCoupling = 0.46; // The time coupling factor (same number as for the TPC) fTimeCoupling = 0.4; // Use drift time maps fTimeStructOn = kTRUE; // The pad response function fPRFOn = kTRUE; ReInit(); } //_____________________________________________________________________________ AliTRDSimParam::~AliTRDSimParam() { // // Destructor // if (fTRFsmp) { delete [] fTRFsmp; fTRFsmp = 0; } if (fCTsmp) { delete [] fCTsmp; fCTsmp = 0; } } //_____________________________________________________________________________ AliTRDSimParam::AliTRDSimParam(const AliTRDSimParam &p) :TObject(p) ,fGasGain(p.fGasGain) ,fNoise(p.fNoise) ,fChipGain(p.fChipGain) ,fADCoutRange(p.fADCoutRange) ,fADCinRange(p.fADCinRange) ,fADCbaseline(p.fADCbaseline) ,fDiffusionOn(p.fDiffusionOn) ,fElAttachOn(p.fElAttachOn) ,fElAttachProp(p.fElAttachProp) ,fTRFOn(p.fTRFOn) ,fTRFsmp(0) ,fTRFbin(p.fTRFbin) ,fTRFlo(p.fTRFlo) ,fTRFhi(p.fTRFhi) ,fTRFwid(p.fTRFwid) ,fCTOn(p.fCTOn) ,fCTsmp(0) ,fPadCoupling(p.fPadCoupling) ,fTimeCoupling(p.fTimeCoupling) ,fTimeStructOn(p.fTimeStructOn) ,fPRFOn(p.fPRFOn) { // // Copy constructor // Int_t iBin = 0; if (((AliTRDSimParam &) p).fTRFsmp) { delete [] ((AliTRDSimParam &) p).fTRFsmp; } ((AliTRDSimParam &) p).fTRFsmp = new Float_t[fTRFbin]; for (iBin = 0; iBin < fTRFbin; iBin++) { ((AliTRDSimParam &) p).fTRFsmp[iBin] = fTRFsmp[iBin]; } if (((AliTRDSimParam &) p).fCTsmp) { delete [] ((AliTRDSimParam &) p).fCTsmp; } ((AliTRDSimParam &) p).fCTsmp = new Float_t[fTRFbin]; for (iBin = 0; iBin < fTRFbin; iBin++) { ((AliTRDSimParam &) p).fCTsmp[iBin] = fCTsmp[iBin]; } } //_____________________________________________________________________________ AliTRDSimParam &AliTRDSimParam::operator=(const AliTRDSimParam &p) { // // Assignment operator // if (this != &p) { ((AliTRDSimParam &) p).Copy(*this); } return *this; } //_____________________________________________________________________________ void AliTRDSimParam::Copy(TObject &p) const { // // Copy function // AliTRDSimParam *target = dynamic_cast (&p); if (!target) { return; } target->fGasGain = fGasGain; target->fNoise = fNoise; target->fChipGain = fChipGain; target->fADCoutRange = fADCoutRange; target->fADCinRange = fADCinRange; target->fADCbaseline = fADCbaseline; target->fDiffusionOn = fDiffusionOn; target->fElAttachOn = fElAttachOn; target->fElAttachProp = fElAttachProp; target->fTRFOn = fTRFOn; target->fTRFbin = fTRFbin; target->fTRFlo = fTRFlo; target->fTRFhi = fTRFhi; target->fTRFwid = fTRFwid; target->fCTOn = fCTOn; target->fPadCoupling = fPadCoupling; target->fTimeCoupling = fTimeCoupling; target->fPRFOn = fPRFOn; if (target->fTRFsmp) { delete[] target->fTRFsmp; } target->fTRFsmp = new Float_t[fTRFbin]; for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { target->fTRFsmp[iBin] = fTRFsmp[iBin]; } if (target->fCTsmp) { delete[] target->fCTsmp; } target->fCTsmp = new Float_t[fTRFbin]; for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { target->fCTsmp[iBin] = fCTsmp[iBin]; } } //_____________________________________________________________________________ void AliTRDSimParam::ReInit() { // // Reinitializes the parameter class after a change // if (AliTRDCommonParam::Instance()->IsXenon()) { // The range and the binwidth for the sampled TRF fTRFbin = 200; // Start 0.2 mus before the signal fTRFlo = -0.4; // End the maximum drift time after the signal fTRFhi = 3.58; // Standard gas gain fGasGain = 4000.0; } else if (AliTRDCommonParam::Instance()->IsArgon()) { // The range and the binwidth for the sampled TRF fTRFbin = 50; // Start 0.2 mus before the signal fTRFlo = 0.02; // End the maximum drift time after the signal fTRFhi = 1.98; // Higher gas gain fGasGain = 8000.0; } else { AliFatal("Not a valid gas mixture!"); exit(1); } fTRFwid = (fTRFhi - fTRFlo) / ((Float_t) fTRFbin); // Create the sampled TRF SampleTRF(); } //_____________________________________________________________________________ void AliTRDSimParam::SampleTRF() { // // Samples the new time response function. // Int_t ipasa = 0; // Xenon // From Antons measurements with Fe55 source, adjusted by C. Lippmann. // time bins are -0.4, -0.38, -0.36, ...., 3.54, 3.56, 3.58 microseconds const Int_t kNpasa = 200; // kNpasa should be equal to fTRFbin! Float_t xtalk[kNpasa]; Float_t signal[kNpasa] = { 0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000 , 0.0002, 0.0007, 0.0026, 0.0089, 0.0253, 0.0612, 0.1319 , 0.2416, 0.3913, 0.5609, 0.7295, 0.8662, 0.9581, 1.0000 , 0.9990, 0.9611, 0.8995, 0.8269, 0.7495, 0.6714, 0.5987 , 0.5334, 0.4756, 0.4249, 0.3811, 0.3433, 0.3110, 0.2837 , 0.2607, 0.2409, 0.2243, 0.2099, 0.1974, 0.1868, 0.1776 , 0.1695, 0.1627, 0.1566, 0.1509, 0.1457, 0.1407, 0.1362 , 0.1317, 0.1274, 0.1233, 0.1196, 0.1162, 0.1131, 0.1102 , 0.1075, 0.1051, 0.1026, 0.1004, 0.0979, 0.0956, 0.0934 , 0.0912, 0.0892, 0.0875, 0.0858, 0.0843, 0.0829, 0.0815 , 0.0799, 0.0786, 0.0772, 0.0757, 0.0741, 0.0729, 0.0718 , 0.0706, 0.0692, 0.0680, 0.0669, 0.0655, 0.0643, 0.0630 , 0.0618, 0.0607, 0.0596, 0.0587, 0.0576, 0.0568, 0.0558 , 0.0550, 0.0541, 0.0531, 0.0522, 0.0513, 0.0505, 0.0497 , 0.0490, 0.0484, 0.0474, 0.0465, 0.0457, 0.0449, 0.0441 , 0.0433, 0.0425, 0.0417, 0.0410, 0.0402, 0.0395, 0.0388 , 0.0381, 0.0374, 0.0368, 0.0361, 0.0354, 0.0348, 0.0342 , 0.0336, 0.0330, 0.0324, 0.0318, 0.0312, 0.0306, 0.0301 , 0.0296, 0.0290, 0.0285, 0.0280, 0.0275, 0.0270, 0.0265 , 0.0260, 0.0256, 0.0251, 0.0246, 0.0242, 0.0238, 0.0233 , 0.0229, 0.0225, 0.0221, 0.0217, 0.0213, 0.0209, 0.0206 , 0.0202, 0.0198, 0.0195, 0.0191, 0.0188, 0.0184, 0.0181 , 0.0178, 0.0175, 0.0171, 0.0168, 0.0165, 0.0162, 0.0159 , 0.0157, 0.0154, 0.0151, 0.0148, 0.0146, 0.0143, 0.0140 , 0.0138, 0.0135, 0.0133, 0.0131, 0.0128, 0.0126, 0.0124 , 0.0121, 0.0119, 0.0120, 0.0115, 0.0113, 0.0111, 0.0109 , 0.0107, 0.0105, 0.0103, 0.0101, 0.0100, 0.0098, 0.0096 , 0.0094, 0.0092, 0.0091, 0.0089, 0.0088, 0.0086, 0.0084 , 0.0083, 0.0081, 0.0080, 0.0078 }; signal[0] = 0.0; signal[1] = 0.0; signal[2] = 0.0; // With undershoot, positive peak corresponds to ~3% of the main signal: for (ipasa = 3; ipasa < kNpasa; ipasa++) { xtalk[ipasa] = 0.2 * (signal[ipasa-2] - signal[ipasa-3]); } xtalk[0] = 0.0; xtalk[1] = 0.0; xtalk[2] = 0.0; // Argon // Ar measurement with Fe55 source by Anton // time bins are 0.02, 0.06, 0.10, ...., 1.90, 1.94, 1.98 microseconds const Int_t kNpasaAr = 50; Float_t xtalkAr[kNpasaAr]; Float_t signalAr[kNpasaAr] = { -0.01, 0.01, 0.00, 0.00, 0.01 , -0.01, 0.01, 2.15, 22.28, 55.53 , 68.52, 58.21, 40.92, 27.12, 18.49 , 13.42, 10.48, 8.67, 7.49, 6.55 , 5.71, 5.12, 4.63, 4.22, 3.81 , 3.48, 3.20, 2.94, 2.77, 2.63 , 2.50, 2.37, 2.23, 2.13, 2.03 , 1.91, 1.83, 1.75, 1.68, 1.63 , 1.56, 1.49, 1.50, 1.49, 1.29 , 1.19, 1.21, 1.21, 1.20, 1.10 }; // Normalization to maximum for (ipasa = 0; ipasa < kNpasaAr; ipasa++) { signalAr[ipasa] /= 68.52; } signalAr[0] = 0.0; signalAr[1] = 0.0; signalAr[2] = 0.0; // With undershoot, positive peak corresponds to ~3% of the main signal: for (ipasa = 3; ipasa < kNpasaAr; ipasa++) { xtalkAr[ipasa] = 0.2 * (signalAr[ipasa-2] - signalAr[ipasa-3]); } xtalkAr[0] = 0.0; xtalkAr[1] = 0.0; xtalkAr[2] = 0.0; if (fTRFsmp) { delete [] fTRFsmp; } fTRFsmp = new Float_t[fTRFbin]; if (fCTsmp) { delete [] fCTsmp; } fCTsmp = new Float_t[fTRFbin]; if (AliTRDCommonParam::Instance()->IsXenon()) { if (fTRFbin != kNpasa) { AliError("Array mismatch (xenon)\n\n"); } } else if (AliTRDCommonParam::Instance()->IsArgon()) { if (fTRFbin != kNpasaAr) { AliError("Array mismatch (argon)\n\n"); } } for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { if (AliTRDCommonParam::Instance()->IsXenon()) { fTRFsmp[iBin] = signal[iBin]; fCTsmp[iBin] = xtalk[iBin]; } else if (AliTRDCommonParam::Instance()->IsArgon()) { fTRFsmp[iBin] = signalAr[iBin]; fCTsmp[iBin] = xtalkAr[iBin]; } } } //_____________________________________________________________________________ Double_t AliTRDSimParam::TimeResponse(Double_t time) const { // // Applies the preamp shaper time response // (We assume a signal rise time of 0.2us = fTRFlo/2. // Double_t rt = (time - .5*fTRFlo) / fTRFwid; Int_t iBin = (Int_t) rt; Double_t dt = rt - iBin; if ((iBin >= 0) && (iBin+1 < fTRFbin)) { return fTRFsmp[iBin] + (fTRFsmp[iBin+1] - fTRFsmp[iBin])*dt; } else { return 0.0; } } //_____________________________________________________________________________ Double_t AliTRDSimParam::CrossTalk(Double_t time) const { // // Applies the pad-pad capacitive cross talk // Double_t rt = (time - fTRFlo) / fTRFwid; Int_t iBin = (Int_t) rt; Double_t dt = rt - iBin; if ((iBin >= 0) && (iBin+1 < fTRFbin)) { return fCTsmp[iBin] + (fCTsmp[iBin+1] - fCTsmp[iBin])*dt; } else { return 0.0; } }