/*
$Log$
+Revision 1.24 2001/05/21 16:45:47 hristov
+Last minute changes (C.Blume)
+
+Revision 1.23 2001/05/07 08:04:48 cblume
+New TRF and PRF. Speedup of the code. Digits from amplification region included
+
+Revision 1.22 2001/03/30 14:40:14 cblume
+Update of the digitization parameter
+
+Revision 1.21 2001/03/13 09:30:35 cblume
+Update of digitization. Moved digit branch definition to AliTRD
+
+Revision 1.20 2001/02/25 20:19:00 hristov
+Minor correction: loop variable declared only once for HP, Sun
+
+Revision 1.19 2001/02/14 18:22:26 cblume
+Change in the geometry of the padplane
+
+Revision 1.18 2001/01/26 19:56:57 hristov
+Major upgrade of AliRoot code
+
+Revision 1.17 2000/12/08 12:53:27 cblume
+Change in Copy() function for HP-compiler
+
+Revision 1.16 2000/12/07 12:20:46 cblume
+Go back to array compression. Use sampled PRF to speed up digitization
+
+Revision 1.15 2000/11/23 14:34:08 cblume
+Fixed bug in expansion routine of arrays (initialize buffers properly)
+
+Revision 1.14 2000/11/20 08:54:44 cblume
+Switch off compression as default
+
+Revision 1.13 2000/11/10 14:57:52 cblume
+Changes in the geometry constants for the DEC compiler
+
Revision 1.12 2000/11/01 14:53:20 cblume
Merge with TRD-develop
#include <TF1.h>
#include "AliRun.h"
+#include "AliMagF.h"
#include "AliTRD.h"
#include "AliTRDhit.h"
// AliTRDdigitizer default constructor
//
- fInputFile = NULL;
- fDigits = NULL;
- fTRD = NULL;
- fGeo = NULL;
- fPRF = NULL;
- fTRF = NULL;
- fTRFint = NULL;
-
- fEvent = 0;
- fGasGain = 0.0;
- fNoise = 0.0;
- fChipGain = 0.0;
- fADCoutRange = 0.0;
- fADCinRange = 0.0;
- fADCthreshold = 0;
- fDiffusionOn = 0;
- fDiffusionT = 0.0;
- fDiffusionL = 0.0;
- fElAttachOn = 0;
- fElAttachProp = 0.0;
- fExBOn = 0;
- fOmegaTau = 0.0;
- fPRFOn = 0;
- fTRFOn = 0;
- fDriftVelocity = 0.0;
-
- fTRFbin = 0;
- fTRFlo = 0.0;
- fTRFhi = 0.0;
- fTRFwid = 0.0;
- fCompress = kFALSE;
- fVerbose = 1;
+ fInputFile = NULL;
+ fDigits = NULL;
+ fTRD = NULL;
+ fGeo = NULL;
+ fPRFsmp = NULL;
+ fTRFsmp = NULL;
+
+ fEvent = 0;
+ fGasGain = 0.0;
+ fNoise = 0.0;
+ fChipGain = 0.0;
+ fSinRange = 0.0;
+ fSoutRange = 0.0;
+ fADCoutRange = 0.0;
+ fADCinRange = 0.0;
+ fADCthreshold = 0;
+ fDiffusionOn = 0;
+ fDiffusionT = 0.0;
+ fDiffusionL = 0.0;
+ fElAttachOn = 0;
+ fElAttachProp = 0.0;
+ fExBOn = 0;
+ fOmegaTau = 0.0;
+ fPRFOn = 0;
+ fTRFOn = 0;
+ fDriftVelocity = 0.0;
+ fPadCoupling = 0.0;
+ fTimeCoupling = 0.0;
+ fTimeBinWidth = 0.0;
+ fField = 0.0;
+
+ fPRFbin = 0;
+ fPRFlo = 0.0;
+ fPRFhi = 0.0;
+ fPRFwid = 0.0;
+ fPRFpad = 0;
+ fTRFbin = 0;
+ fTRFlo = 0.0;
+ fTRFhi = 0.0;
+ fTRFwid = 0.0;
+
+ fCompress = kTRUE;
+ fVerbose = 1;
+ fSDigits = kFALSE;
}
fDigits = NULL;
fTRD = NULL;
fGeo = NULL;
+ fPRFsmp = NULL;
+ fTRFsmp = NULL;
fEvent = 0;
fCompress = kTRUE;
fVerbose = 1;
+ fSDigits = kFALSE;
Init();
delete fDigits;
}
- if (fPRF) delete fPRF;
- if (fTRF) delete fTRF;
-
}
//_____________________________________________________________________________
// Copy function
//
- ((AliTRDdigitizer &) d).fInputFile = NULL;
- ((AliTRDdigitizer &) d).fDigits = NULL;
- ((AliTRDdigitizer &) d).fTRD = NULL;
- ((AliTRDdigitizer &) d).fGeo = NULL;
-
- ((AliTRDdigitizer &) d).fEvent = 0;
-
- ((AliTRDdigitizer &) d).fGasGain = fGasGain;
- ((AliTRDdigitizer &) d).fNoise = fNoise;
- ((AliTRDdigitizer &) d).fChipGain = fChipGain;
- ((AliTRDdigitizer &) d).fADCoutRange = fADCoutRange;
- ((AliTRDdigitizer &) d).fADCinRange = fADCinRange;
- ((AliTRDdigitizer &) d).fADCthreshold = fADCthreshold;
- ((AliTRDdigitizer &) d).fDiffusionOn = fDiffusionOn;
- ((AliTRDdigitizer &) d).fDiffusionT = fDiffusionT;
- ((AliTRDdigitizer &) d).fDiffusionL = fDiffusionL;
- ((AliTRDdigitizer &) d).fElAttachOn = fElAttachOn;
- ((AliTRDdigitizer &) d).fElAttachProp = fElAttachProp;
- ((AliTRDdigitizer &) d).fExBOn = fExBOn;
- ((AliTRDdigitizer &) d).fOmegaTau = fOmegaTau;
- ((AliTRDdigitizer &) d).fLorentzFactor = fLorentzFactor;
- ((AliTRDdigitizer &) d).fPRFOn = fPRFOn;
- ((AliTRDdigitizer &) d).fTRFOn = fTRFOn;
-
- ((AliTRDdigitizer &) d).fCompress = fCompress;
- ((AliTRDdigitizer &) d).fVerbose = fVerbose;
-
- fPRF->Copy(*((AliTRDdigitizer &) d).fPRF);
- fTRF->Copy(*((AliTRDdigitizer &) d).fTRF);
-
- ((AliTRDdigitizer &) d).fTRFbin = fTRFbin;
- ((AliTRDdigitizer &) d).fTRFlo = fTRFlo;
- ((AliTRDdigitizer &) d).fTRFhi = fTRFhi;
- ((AliTRDdigitizer &) d).fTRFwid = fTRFwid;
- if (((AliTRDdigitizer &) d).fTRFint) delete ((AliTRDdigitizer &) d).fTRFint;
- ((AliTRDdigitizer &) d).fTRFint = new Float_t[fTRFbin];
- for (Int_t iBin = 0; iBin < fTRFbin; iBin++) {
- ((AliTRDdigitizer &) d).fTRFint[iBin] = fTRFint[iBin];
+ Int_t iBin;
+
+ ((AliTRDdigitizer &) d).fInputFile = NULL;
+ ((AliTRDdigitizer &) d).fDigits = NULL;
+ ((AliTRDdigitizer &) d).fTRD = NULL;
+ ((AliTRDdigitizer &) d).fGeo = NULL;
+
+ ((AliTRDdigitizer &) d).fEvent = 0;
+
+ ((AliTRDdigitizer &) d).fGasGain = fGasGain;
+ ((AliTRDdigitizer &) d).fNoise = fNoise;
+ ((AliTRDdigitizer &) d).fChipGain = fChipGain;
+ ((AliTRDdigitizer &) d).fSoutRange = fSoutRange;
+ ((AliTRDdigitizer &) d).fSinRange = fSinRange;
+ ((AliTRDdigitizer &) d).fADCoutRange = fADCoutRange;
+ ((AliTRDdigitizer &) d).fADCinRange = fADCinRange;
+ ((AliTRDdigitizer &) d).fADCthreshold = fADCthreshold;
+ ((AliTRDdigitizer &) d).fDiffusionOn = fDiffusionOn;
+ ((AliTRDdigitizer &) d).fDiffusionT = fDiffusionT;
+ ((AliTRDdigitizer &) d).fDiffusionL = fDiffusionL;
+ ((AliTRDdigitizer &) d).fElAttachOn = fElAttachOn;
+ ((AliTRDdigitizer &) d).fElAttachProp = fElAttachProp;
+ ((AliTRDdigitizer &) d).fExBOn = fExBOn;
+ ((AliTRDdigitizer &) d).fOmegaTau = fOmegaTau;
+ ((AliTRDdigitizer &) d).fLorentzFactor = fLorentzFactor;
+ ((AliTRDdigitizer &) d).fDriftVelocity = fDriftVelocity;
+ ((AliTRDdigitizer &) d).fPadCoupling = fPadCoupling;
+ ((AliTRDdigitizer &) d).fTimeCoupling = fTimeCoupling;
+ ((AliTRDdigitizer &) d).fTimeBinWidth = fTimeBinWidth;
+ ((AliTRDdigitizer &) d).fField = fField;
+ ((AliTRDdigitizer &) d).fPRFOn = fPRFOn;
+ ((AliTRDdigitizer &) d).fTRFOn = fTRFOn;
+
+ ((AliTRDdigitizer &) d).fCompress = fCompress;
+ ((AliTRDdigitizer &) d).fVerbose = fVerbose;
+ ((AliTRDdigitizer &) d).fSDigits = fSDigits;
+
+ ((AliTRDdigitizer &) d).fPRFbin = fPRFbin;
+ ((AliTRDdigitizer &) d).fPRFlo = fPRFlo;
+ ((AliTRDdigitizer &) d).fPRFhi = fPRFhi;
+ ((AliTRDdigitizer &) d).fPRFwid = fPRFwid;
+ ((AliTRDdigitizer &) d).fPRFpad = fPRFpad;
+ if (((AliTRDdigitizer &) d).fPRFsmp) delete ((AliTRDdigitizer &) d).fPRFsmp;
+ ((AliTRDdigitizer &) d).fPRFsmp = new Float_t[fPRFbin];
+ for (iBin = 0; iBin < fPRFbin; iBin++) {
+ ((AliTRDdigitizer &) d).fPRFsmp[iBin] = fPRFsmp[iBin];
}
-
+ ((AliTRDdigitizer &) d).fTRFbin = fTRFbin;
+ ((AliTRDdigitizer &) d).fTRFlo = fTRFlo;
+ ((AliTRDdigitizer &) d).fTRFhi = fTRFhi;
+ ((AliTRDdigitizer &) d).fTRFwid = fTRFwid;
+ if (((AliTRDdigitizer &) d).fTRFsmp) delete ((AliTRDdigitizer &) d).fTRFsmp;
+ ((AliTRDdigitizer &) d).fTRFsmp = new Float_t[fTRFbin];
+ for (iBin = 0; iBin < fTRFbin; iBin++) {
+ ((AliTRDdigitizer &) d).fTRFsmp[iBin] = fTRFsmp[iBin];
+ }
+
}
//_____________________________________________________________________________
// Applies the pad response
//
- if (fPRF) {
- pad[0] = TMath::Max(fPRF->Eval(-1.0 - dist,0,0) * signal,0.0);
- pad[1] = TMath::Max(fPRF->Eval( - dist,0,0) * signal,0.0);
- pad[2] = TMath::Max(fPRF->Eval( 1.0 - dist,0,0) * signal,0.0);
+ Int_t iBin = ((Int_t) (( - dist - fPRFlo) / fPRFwid));
+
+ Int_t iBin0 = iBin - fPRFpad;
+ Int_t iBin1 = iBin;
+ Int_t iBin2 = iBin + fPRFpad;
+
+ if ((iBin0 >= 0) && (iBin2 < fPRFbin)) {
+
+ pad[0] = signal * fPRFsmp[iBin0];
+ pad[1] = signal * fPRFsmp[iBin1];
+ pad[2] = signal * fPRFsmp[iBin2];
+
return 1;
+
}
else {
+
return 0;
+
}
}
Int_t iBin = ((Int_t) ((time - fTRFlo) / fTRFwid));
if ((iBin >= 0) && (iBin < fTRFbin)) {
- return fTRFint[iBin];
+ return fTRFsmp[iBin];
}
else {
return 0.0;
//
// The default parameter for the digitization
- fGasGain = 8.0E3;
- fNoise = 3000.;
- fChipGain = 10.;
- fADCoutRange = 255.;
- fADCinRange = 2000.;
- fADCthreshold = 1;
-
- // Transverse and longitudinal diffusion coefficients (Xe/Isobutane)
- fDiffusionOn = 1;
- fDiffusionT = 0.060;
- fDiffusionL = 0.017;
+ fGasGain = 2800.;
+ fChipGain = 6.1;
+ fNoise = 1000.;
+ fADCoutRange = 1023.; // 10-bit ADC
+ fADCinRange = 1000.; // 1V input range
+ fADCthreshold = 1;
- // Propability for electron attachment
- fElAttachOn = 0;
- fElAttachProp = 0.0;
+ // For the summable digits
+ fSinRange = 1000000.;
+ fSoutRange = 1000000.;
+
+ // The drift velocity (cm / mus)
+ fDriftVelocity = 1.5;
+
+ // Diffusion on
+ fDiffusionOn = 1;
// E x B effects
- fExBOn = 0;
- // omega * tau. (tau ~ 12 * 10^-12, B = 0.2T)
- fOmegaTau = 17.6 * 12.0 * 0.2 * 0.01;
+ fExBOn = 0;
- // The pad response function
- fPRFOn = 1;
- fPRF = new TF1("PRF","[0]*([1]+exp(-x*x/(2.0*[2])))",-3,3);
- fPRF->SetParameter(0, 0.8872);
- fPRF->SetParameter(1,-0.00573);
- fPRF->SetParameter(2, 0.454 * 0.454);
+ // Propability for electron attachment
+ fElAttachOn = 0;
+ fElAttachProp = 0.0;
- // The drift velocity (cm / mus)
- fDriftVelocity = 1.0;
+ // The pad response function
+ fPRFOn = 1;
// The time response function
- fTRFOn = 1;
- Float_t loTRF = -200.0;
- Float_t hiTRF = 1000.0;
- fTRF = new TF1("TRF",TRFlandau,loTRF,hiTRF,3);
- fTRF->SetParameter(0, 1.0 / 24.24249);
- fTRF->SetParameter(1, 0.0);
- fTRF->SetParameter(2, 25.0);
- fTRFbin = 1200;
- fTRFlo = loTRF * fDriftVelocity / 1000.0;
- fTRFhi = hiTRF * fDriftVelocity / 1000.0;
- fTRFwid = (fTRFhi - fTRFlo) / ((Float_t) fTRFbin);
+ fTRFOn = 1;
+
+ // The pad coupling factor (same number as for the TPC)
+ fPadCoupling = 0.5;
+
+ // The time coupling factor (same number as for the TPC)
+ fTimeCoupling = 0.4;
}
//_____________________________________________________________________________
-void AliTRDdigitizer::IntegrateTRF()
+void AliTRDdigitizer::ReInit()
{
//
- // Integrates the time response function over the time bin size
+ // Reinitializes the digitization procedure after a change in the parameter
//
- if (fTRFint) delete fTRFint;
- fTRFint = new Float_t[fTRFbin];
- Float_t hiTRF = fTRFhi / fDriftVelocity * 1000.0;
- Float_t loTRF = fTRFlo / fDriftVelocity * 1000.0;
- Float_t timeBin = fGeo->GetTimeBinSize() / fDriftVelocity * 1000.0;
+ if (!fGeo) {
+ printf("AliTRDdigitizer::ReInit -- ");
+ printf("No geometry defined. Run InitDetector() first\n");
+ exit(1);
+ }
+
+ // Calculate the time bin width in ns
+ fTimeBinWidth = fGeo->GetTimeBinSize() / fDriftVelocity * 1000.0;
+
+ // The range and the binwidth for the sampled TRF
+ fTRFbin = 100;
+ // Start 0.2 mus before the signal
+ fTRFlo = -0.2 * fDriftVelocity;
+ // End the maximum driftlength after the signal
+ fTRFhi = AliTRDgeometry::DrThick()
+ + fGeo->GetTimeAfter() * fGeo->GetTimeBinSize();
+ fTRFwid = (fTRFhi - fTRFlo) / ((Float_t) fTRFbin);
+
+ // Transverse and longitudinal diffusion coefficients (Xe/CO2)
+ fDiffusionT = GetDiffusionT(fDriftVelocity,fField);
+ fDiffusionL = GetDiffusionL(fDriftVelocity,fField);
+
+ // omega * tau.= tan(Lorentz-angle)
+ fOmegaTau = GetOmegaTau(fDriftVelocity,fField);
+
+ // The Lorentz factor
+ if (fExBOn) {
+ fLorentzFactor = 1.0 / (1.0 + fOmegaTau*fOmegaTau);
+ }
+ else {
+ fLorentzFactor = 1.0;
+ }
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::SampleTRF()
+{
+ //
+ // Samples the time response function
+ // It is defined according to Vasiles simulation of the preamp shaper
+ // output and includes the effect of the ion tail (based on Tariqs
+ // Garfield simulation) and a shaping time of 125 ns FWHM
+ //
+
+ Int_t ipos1;
+ Int_t ipos2;
+ Float_t diff;
+
+ const Int_t kNpasa = 200;
+ Float_t time[kNpasa] = { -0.280000, -0.270000, -0.260000, -0.250000
+ , -0.240000, -0.230000, -0.220000, -0.210000
+ , -0.200000, -0.190000, -0.180000, -0.170000
+ , -0.160000, -0.150000, -0.140000, -0.130000
+ , -0.120000, -0.110000, -0.100000, -0.090000
+ , -0.080000, -0.070000, -0.060000, -0.050000
+ , -0.040000, -0.030000, -0.020000, -0.010000
+ , -0.000000, 0.010000, 0.020000, 0.030000
+ , 0.040000, 0.050000, 0.060000, 0.070000
+ , 0.080000, 0.090000, 0.100000, 0.110000
+ , 0.120000, 0.130000, 0.140000, 0.150000
+ , 0.160000, 0.170000, 0.180000, 0.190000
+ , 0.200000, 0.210000, 0.220000, 0.230000
+ , 0.240000, 0.250000, 0.260000, 0.270000
+ , 0.280000, 0.290000, 0.300000, 0.310000
+ , 0.320000, 0.330000, 0.340000, 0.350000
+ , 0.360000, 0.370000, 0.380000, 0.390000
+ , 0.400000, 0.410000, 0.420000, 0.430000
+ , 0.440000, 0.450000, 0.460000, 0.470000
+ , 0.480000, 0.490000, 0.500000, 0.510000
+ , 0.520000, 0.530000, 0.540000, 0.550000
+ , 0.560000, 0.570000, 0.580000, 0.590000
+ , 0.600000, 0.610000, 0.620000, 0.630000
+ , 0.640000, 0.650000, 0.660000, 0.670000
+ , 0.680000, 0.690000, 0.700000, 0.710000
+ , 0.720000, 0.730000, 0.740000, 0.750000
+ , 0.760000, 0.770000, 0.780000, 0.790000
+ , 0.800000, 0.810000, 0.820000, 0.830000
+ , 0.840000, 0.850000, 0.860000, 0.870000
+ , 0.880000, 0.890000, 0.900000, 0.910000
+ , 0.920000, 0.930000, 0.940000, 0.950000
+ , 0.960000, 0.970000, 0.980000, 0.990000
+ , 1.000000, 1.010000, 1.020000, 1.030000
+ , 1.040000, 1.050000, 1.060000, 1.070000
+ , 1.080000, 1.090000, 1.100000, 1.110000
+ , 1.120000, 1.130000, 1.140000, 1.150000
+ , 1.160000, 1.170000, 1.180000, 1.190000
+ , 1.200000, 1.210000, 1.220000, 1.230000
+ , 1.240000, 1.250000, 1.260000, 1.270000
+ , 1.280000, 1.290000, 1.300000, 1.310000
+ , 1.320000, 1.330000, 1.340000, 1.350000
+ , 1.360000, 1.370000, 1.380000, 1.390000
+ , 1.400000, 1.410000, 1.420000, 1.430000
+ , 1.440000, 1.450000, 1.460000, 1.470000
+ , 1.480000, 1.490000, 1.500000, 1.510000
+ , 1.520000, 1.530000, 1.540000, 1.550000
+ , 1.560000, 1.570000, 1.580000, 1.590000
+ , 1.600000, 1.610000, 1.620000, 1.630000
+ , 1.640000, 1.650000, 1.660000, 1.670000
+ , 1.680000, 1.690000, 1.700000, 1.710000 };
+
+ Float_t signal[kNpasa] = { 0.000000, 0.000000, 0.000000, 0.000000
+ , 0.000000, 0.000000, 0.000000, 0.000000
+ , 0.000000, 0.000000, 0.000000, 0.000000
+ , 0.000000, 0.000000, 0.000000, 0.000098
+ , 0.003071, 0.020056, 0.066053, 0.148346
+ , 0.263120, 0.398496, 0.540226, 0.674436
+ , 0.790977, 0.883083, 0.947744, 0.985714
+ , 0.999248, 0.992105, 0.967669, 0.930827
+ , 0.884586, 0.833083, 0.778571, 0.723684
+ , 0.669173, 0.617293, 0.567669, 0.521805
+ , 0.479699, 0.440977, 0.405639, 0.373985
+ , 0.345526, 0.320038, 0.297256, 0.276917
+ , 0.258797, 0.242632, 0.228195, 0.215301
+ , 0.203759, 0.193383, 0.184023, 0.175564
+ , 0.167895, 0.160940, 0.154549, 0.148722
+ , 0.143308, 0.138346, 0.133722, 0.129398
+ , 0.125376, 0.121617, 0.118045, 0.114699
+ , 0.111541, 0.108571, 0.105714, 0.103008
+ , 0.100414, 0.097970, 0.095602, 0.093346
+ , 0.091165, 0.089060, 0.087068, 0.085150
+ , 0.083308, 0.081541, 0.079812, 0.078158
+ , 0.076541, 0.075000, 0.073496, 0.072068
+ , 0.070677, 0.069286, 0.068008, 0.066729
+ , 0.065489, 0.064286, 0.063120, 0.061992
+ , 0.060902, 0.059850, 0.058797, 0.057820
+ , 0.056842, 0.055902, 0.054962, 0.054060
+ , 0.053158, 0.052293, 0.051466, 0.050639
+ , 0.049850, 0.049060, 0.048308, 0.047556
+ , 0.046842, 0.046128, 0.045451, 0.044774
+ , 0.044098, 0.043459, 0.042820, 0.042218
+ , 0.041617, 0.041015, 0.040451, 0.039887
+ , 0.039323, 0.038797, 0.038271, 0.037744
+ , 0.037237, 0.036744, 0.036259, 0.035786
+ , 0.035323, 0.034872, 0.034429, 0.033996
+ , 0.033575, 0.033162, 0.032756, 0.032361
+ , 0.031974, 0.031594, 0.031222, 0.030857
+ , 0.030496, 0.030143, 0.029793, 0.029451
+ , 0.029109, 0.028774, 0.028444, 0.028113
+ , 0.027793, 0.027477, 0.027165, 0.026861
+ , 0.026564, 0.026271, 0.025981, 0.025699
+ , 0.025421, 0.025147, 0.024880, 0.024613
+ , 0.024353, 0.024094, 0.023842, 0.023590
+ , 0.023346, 0.023102, 0.022865, 0.022628
+ , 0.022398, 0.022173, 0.021951, 0.021733
+ , 0.021519, 0.021308, 0.021098, 0.020891
+ , 0.020688, 0.020485, 0.020286, 0.020090
+ , 0.019895, 0.019707, 0.019519, 0.019335
+ , 0.019150, 0.018974, 0.018797, 0.018624
+ , 0.018451, 0.018282, 0.018113, 0.017947
+ , 0.017782, 0.017617, 0.017455, 0.017297 };
+
+ //for (Int_t ipasa = 0; ipasa < kNpasa; ipasa++) {
+ // time[ipasa] += 0.13;
+ // time[ipasa] *= 0.5;
+ //}
+
+ if (fTRFsmp) delete fTRFsmp;
+ fTRFsmp = new Float_t[fTRFbin];
+
+ Float_t loTRF = TMath::Max(fTRFlo / fDriftVelocity,time[0]);
+ Float_t hiTRF = TMath::Min(fTRFhi / fDriftVelocity,time[kNpasa-1]);
Float_t binWidth = (hiTRF - loTRF) / ((Float_t) fTRFbin);
+
+ // Take the linear interpolation
for (Int_t iBin = 0; iBin < fTRFbin; iBin++) {
- Float_t bin = iBin * binWidth + loTRF - 0.5 * timeBin;
- fTRFint[iBin] = fTRF->Integral(bin,bin + timeBin);
+
+ Float_t bin = (((Float_t) iBin) + 0.5) * binWidth + loTRF;
+ ipos1 = ipos2 = 0;
+ diff = 0;
+ do {
+ diff = bin - time[ipos2++];
+ } while (diff > 0);
+ ipos2--;
+ if (ipos2 > kNpasa) ipos2 = kNpasa - 1;
+ ipos1 = ipos2 - 1;
+
+ fTRFsmp[iBin] = signal[ipos2]
+ + diff * (signal[ipos2] - signal[ipos1])
+ / ( time[ipos2] - time[ipos1]);
+
+ }
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::SamplePRF()
+{
+ //
+ // Samples the pad response function
+ //
+
+ const Int_t kPRFbin = 61;
+ Float_t prf[kPRFbin] = { 0.002340, 0.003380, 0.004900, 0.007080, 0.010220
+ , 0.014740, 0.021160, 0.030230, 0.042800, 0.059830
+ , 0.082030, 0.109700, 0.142550, 0.179840, 0.220610
+ , 0.263980, 0.309180, 0.355610, 0.402790, 0.450350
+ , 0.497930, 0.545190, 0.591740, 0.637100, 0.680610
+ , 0.721430, 0.758400, 0.790090, 0.814720, 0.830480
+ , 0.835930, 0.830480, 0.814710, 0.790070, 0.758390
+ , 0.721410, 0.680590, 0.637080, 0.591730, 0.545180
+ , 0.497920, 0.450340, 0.402790, 0.355610, 0.309190
+ , 0.263990, 0.220630, 0.179850, 0.142570, 0.109720
+ , 0.082040, 0.059830, 0.042820, 0.030230, 0.021170
+ , 0.014740, 0.010230, 0.007080, 0.004900, 0.003380
+ , 0.002340 };
+
+ fPRFlo = -1.5;
+ fPRFhi = 1.5;
+ fPRFbin = kPRFbin;
+ fPRFwid = (fPRFhi - fPRFlo) / ((Float_t) fPRFbin);
+ fPRFpad = ((Int_t) (1.0 / fPRFwid));
+
+ if (fPRFsmp) delete fPRFsmp;
+ fPRFsmp = new Float_t[fPRFbin];
+ for (Int_t iBin = 0; iBin < fPRFbin; iBin++) {
+ fPRFsmp[iBin] = prf[iBin];
}
}
// Get the pointer to the detector class and check for version 1
fTRD = (AliTRD*) gAlice->GetDetector("TRD");
if (fTRD->IsVersion() != 1) {
- printf("AliTRDdigitizer::Open -- ");
+ printf("AliTRDdigitizer::InitDetector -- ");
printf("TRD must be version 1 (slow simulator).\n");
exit(1);
}
// Get the geometry
fGeo = fTRD->GetGeometry();
- printf("AliTRDdigitizer::Open -- ");
+ printf("AliTRDdigitizer::InitDetector -- ");
printf("Geometry version %d\n",fGeo->IsVersion());
+ // The magnetic field strength in Tesla
+ fField = 0.2 * gAlice->Field()->Factor();
+
+ ReInit();
+
return kTRUE;
}
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::SumSDigits()
+{
+ //
+ // Sums up the summable digits and creates final digits
+ // Not yet implemented
+ //
+
+ return kFALSE;
+
+}
+
//_____________________________________________________________________________
Bool_t AliTRDdigitizer::MakeDigits()
{
//
- // Loops through the TRD-hits and creates the digits.
+ // Creates digits.
//
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
// Converts number of electrons to fC
- const Float_t kEl2fC = 1.602E-19 * 1.0E15;
+ const Double_t kEl2fC = 1.602E-19 * 1.0E15;
///////////////////////////////////////////////////////////////
// Number of track dictionary arrays
const Int_t kNDict = AliTRDdigitsManager::kNDict;
- Int_t iRow, iCol, iTime;
- Int_t iDict;
+ // Half the width of the amplification region
+ const Float_t kAmWidth = AliTRDgeometry::AmThick() / 2.;
+
+ Int_t iRow, iCol, iTime, iPad;
+ Int_t iDict = 0;
Int_t nBytes = 0;
Int_t totalSizeDigits = 0;
Int_t totalSizeDict1 = 0;
Int_t totalSizeDict2 = 0;
+ Int_t timeTRDbeg = 0;
+ Int_t timeTRDend = 1;
+
+ Float_t pos[3];
+ Float_t rot[3];
+ Float_t xyz[3];
+ Float_t padSignal[kNpad];
+ Float_t signalOld[kNpad];
+
AliTRDdataArrayF *signals = 0;
AliTRDdataArrayI *digits = 0;
AliTRDdataArrayI *dictionary[kNDict];
AliTRDsegmentArray *signalsArray
= new AliTRDsegmentArray("AliTRDdataArrayF",AliTRDgeometry::Ndet());
+ if (fTRFOn) {
+ timeTRDbeg = ((Int_t) (-fTRFlo / fGeo->GetTimeBinSize())) - 1;
+ timeTRDend = ((Int_t) ( fTRFhi / fGeo->GetTimeBinSize())) - 1;
+ printf("AliTRDdigitizer::MakeDigits -- ");
+ printf("Sample the TRF between -%d and %d\n",timeTRDbeg,timeTRDend);
+ }
+
+ Float_t elAttachProp = fElAttachProp / 100.;
+
+ // Create the sampled PRF
+ SamplePRF();
+
+ // Create the sampled TRF
+ SampleTRF();
+
if (!fGeo) {
printf("AliTRDdigitizer::MakeDigits -- ");
printf("No geometry defined\n");
printf("Start creating digits.\n");
if (fVerbose > 0) this->Dump();
- // The Lorentz factor
- if (fExBOn) {
- fLorentzFactor = 1.0 / (1.0 + fOmegaTau*fOmegaTau);
- }
- else {
- fLorentzFactor = 1.0;
- }
-
- // Create the integrated TRF
- IntegrateTRF();
-
// Get the pointer to the hit tree
TTree *HitTree = gAlice->TreeH();
countHits++;
AliTRDhit *hit = (AliTRDhit *) fTRD->Hits()->UncheckedAt(iHit);
- Float_t pos[3];
pos[0] = hit->X();
pos[1] = hit->Y();
pos[2] = hit->Z();
Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector);
Int_t nColMax = fGeo->GetColMax(plane);
Int_t nTimeMax = fGeo->GetTimeMax();
+ Int_t nTimeBefore = fGeo->GetTimeBefore();
+ Int_t nTimeAfter = fGeo->GetTimeAfter();
+ Int_t nTimeTotal = fGeo->GetTimeTotal();
Float_t row0 = fGeo->GetRow0(plane,chamber,sector);
Float_t col0 = fGeo->GetCol0(plane);
Float_t time0 = fGeo->GetTime0(plane);
- Float_t rowPadSize = fGeo->GetRowPadSize();
- Float_t colPadSize = fGeo->GetColPadSize();
+ Float_t rowPadSize = fGeo->GetRowPadSize(plane,chamber,sector);
+ Float_t colPadSize = fGeo->GetColPadSize(plane);
Float_t timeBinSize = fGeo->GetTimeBinSize();
+ Float_t divideRow = 1.0 / rowPadSize;
+ Float_t divideCol = 1.0 / colPadSize;
+ Float_t divideTime = 1.0 / timeBinSize;
if (fVerbose > 1) {
printf("Analyze hit no. %d ",iHit);
,plane,sector,chamber);
printf("nRowMax = %d, nColMax = %d, nTimeMax = %d\n"
,nRowMax,nColMax,nTimeMax);
+ printf("nTimeBefore = %d, nTimeAfter = %d, nTimeTotal = %d\n"
+ ,nTimeBefore,nTimeAfter,nTimeTotal);
printf("row0 = %f, col0 = %f, time0 = %f\n"
,row0,col0,time0);
+ printf("rowPadSize = %f, colPadSize = %f, timeBinSize = %f\n"
+ ,rowPadSize,colPadSize,timeBinSize);
}
- // Don't analyze test hits with amplitude 0.
- if (((Int_t) q) == 0) continue;
+ // Don't analyze test hits
+ if (hit->FromTest()) continue;
- // Get different container if the detector has changed
if (detector != detectorOld) {
+
if (fVerbose > 1) {
printf("AliTRDdigitizer::MakeDigits -- ");
printf("Get new container. New det = %d, Old det = %d\n"
if ((fCompress) && (detectorOld > -1)) {
if (fVerbose > 1) {
printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Compress the old container ... ");
+ printf("Compress the old container ...");
}
signals->Compress(1,0);
for (iDict = 0; iDict < kNDict; iDict++) {
printf("AliTRDdigitizer::MakeDigits -- ");
printf("Allocate a new container ... ");
}
- signals->Allocate(nRowMax,nColMax,nTimeMax);
+ signals->Allocate(nRowMax,nColMax,nTimeTotal);
}
else {
// Expand an existing one
- if (fVerbose > 1) {
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Expand an existing container ... ");
+ if (fCompress) {
+ if (fVerbose > 1) {
+ printf("AliTRDdigitizer::MakeDigits -- ");
+ printf("Expand an existing container ... ");
+ }
+ signals->Expand();
}
- if (fCompress) signals->Expand();
}
// The same for the dictionary
for (iDict = 0; iDict < kNDict; iDict++) {
dictionary[iDict] = fDigits->GetDictionary(detector,iDict);
if (dictionary[iDict]->GetNtime() == 0) {
- dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeMax);
+ dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
}
else {
if (fCompress) dictionary[iDict]->Expand();
}
// Rotate the sectors on top of each other
- Float_t rot[3];
fGeo->Rotate(detector,pos,rot);
- // The driftlength
+ // The driftlength. It is negative if the hit is in the
+ // amplification region.
Float_t driftlength = time0 - rot[0];
- if ((driftlength < 0) ||
- (driftlength > AliTRDgeometry::DrThick())) continue;
- Float_t driftlengthL = driftlength;
- if (fExBOn) driftlengthL /= TMath::Sqrt(fLorentzFactor);
- // The hit position in pad coordinates (center pad)
- // The pad row (z-direction)
- Int_t rowH = (Int_t) ((rot[2] - row0) / rowPadSize);
- // The pad column (rphi-direction)
- Int_t colH = (Int_t) ((rot[1] - col0) / colPadSize);
- // The time bucket
- Int_t timeH = (Int_t) (driftlength / timeBinSize);
- if (fVerbose > 1) {
- printf("rowH = %d, colH = %d, timeH = %d\n"
- ,rowH,colH,timeH);
- }
+ // Take also the drift in the amplification region into account
+ // The drift length is at the moment still the same, regardless of
+ // the position relativ to the wire. This non-isochronity needs still
+ // to be implemented.
+ Float_t driftlengthL = TMath::Abs(driftlength + kAmWidth);
+ if (fExBOn) driftlengthL /= TMath::Sqrt(fLorentzFactor);
// Loop over all electrons of this hit
// TR photons produce hits with negative charge
Int_t nEl = ((Int_t) TMath::Abs(q));
for (Int_t iEl = 0; iEl < nEl; iEl++) {
- Float_t xyz[3];
xyz[0] = rot[0];
xyz[1] = rot[1];
xyz[2] = rot[2];
// Electron attachment
if (fElAttachOn) {
- if (gRandom->Rndm() < (driftlengthL * fElAttachProp / 100.))
+ if (gRandom->Rndm() < (driftlengthL * elAttachProp))
continue;
}
if (!(Diffusion(driftlengthL,xyz))) continue;
}
- // Apply E x B effects
+ // Apply E x B effects (depends on drift direction)
if (fExBOn) {
- if (!(ExB(driftlength,xyz))) continue;
+ if (!(ExB(driftlength+kAmWidth,xyz))) continue;
}
- // The electron position
+ // The electron position after diffusion and ExB in pad coordinates
// The pad row (z-direction)
- Int_t rowE = (Int_t) ((xyz[2] - row0) / rowPadSize);
- // The pad column (rphi-direction)
- Int_t colE = (Int_t) ((xyz[1] - col0) / colPadSize);
- // The time bucket
- Int_t timeE = (Int_t) ((time0 - xyz[0]) / timeBinSize);
-
- if (( rowE < 0) || ( rowE >= nRowMax)) continue;
- if (( colE < 0) || ( colE >= nColMax)) continue;
- if ((timeE < 0) || (timeE >= nTimeMax)) continue;
+ Int_t rowE = ((Int_t) ((xyz[2] - row0) * divideRow));
+ if ((rowE < 0) || (rowE >= nRowMax)) continue;
+ // The pad column (rphi-direction)
+ Int_t colE = ((Int_t) ((xyz[1] - col0) * divideCol));
+ if ((colE < 0) || (colE >= nColMax)) continue;
+
+ // The time bin (negative for hits in the amplification region)
+ // In the amplification region the electrons drift from both sides
+ // to the middle (anode wire plane)
+ Float_t timeDist = time0 - xyz[0];
+ Float_t timeOffset = 0;
+ Int_t timeE = 0;
+ if (timeDist > 0) {
+ // The time bin
+ timeE = ((Int_t) (timeDist * divideTime));
+ // The distance of the position to the middle of the timebin
+ timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) - timeDist;
+ }
+ else {
+ // Difference between half of the amplification gap width and
+ // the distance to the anode wire
+ Float_t anodeDist = kAmWidth - TMath::Abs(timeDist + kAmWidth);
+ // The time bin
+ timeE = -1 * (((Int_t ) (anodeDist * divideTime)) + 1);
+ // The distance of the position to the middle of the timebin
+ timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) + anodeDist;
+ }
+
// Apply the gas gain including fluctuations
Float_t ggRndm = 0.0;
do {
} while (ggRndm <= 0);
Int_t signal = (Int_t) (-fGasGain * TMath::Log(ggRndm));
- if (fVerbose > 2) {
- printf(" electron no. %d, signal = %d\n",iEl,signal);
- printf(" rowE = %d, colE = %d, timeE = %d\n"
- ,rowE,colE,timeE);
- }
-
// Apply the pad response
- Float_t padSignal[kNpad];
if (fPRFOn) {
// The distance of the electron to the center of the pad
// in units of pad width
Float_t dist = (xyz[1] - col0 - (colE + 0.5) * colPadSize)
- / colPadSize;
+ * divideCol;
if (!(PadResponse(signal,dist,padSignal))) continue;
}
else {
padSignal[2] = 0.0;
}
- // The distance of the position to the beginning of the timebin
- Float_t timeOffset = (time0 - timeE * timeBinSize) - xyz[0];
- Int_t timeTRDbeg = 0;
- Int_t timeTRDend = 1;
- if (fTRFOn) {
- timeTRDbeg = 2;
- timeTRDend = 11;
- }
- for (Int_t iTimeBin = TMath::Max(timeE - timeTRDbeg, 0)
- ; iTimeBin < TMath::Min(timeE + timeTRDend,nTimeMax)
- ; iTimeBin++) {
+ // Sample the time response inside the drift region
+ // + additional time bins before and after.
+ // The sampling is done always in the middle of the time bin
+ for (Int_t iTimeBin = TMath::Max(timeE-timeTRDbeg, -nTimeBefore)
+ ;iTimeBin < TMath::Min(timeE+timeTRDend,nTimeMax+nTimeAfter )
+ ;iTimeBin++) {
// Apply the time response
Float_t timeResponse = 1.0;
timeResponse = TimeResponse(time);
}
- // Add the signals
- Float_t signalOld[kNpad] = { 0.0, 0.0, 0.0 };
- for (Int_t iPad = 0; iPad < kNpad; iPad++) {
+ signalOld[0] = 0.0;
+ signalOld[1] = 0.0;
+ signalOld[2] = 0.0;
+
+ for (iPad = 0; iPad < kNpad; iPad++) {
+
Int_t colPos = colE + iPad - 1;
if (colPos < 0) continue;
if (colPos >= nColMax) break;
- signalOld[iPad] = signals->GetData(rowE,colPos,iTimeBin);
- signalOld[iPad] += padSignal[iPad] * timeResponse;
- signals->SetData(rowE,colPos,iTimeBin,signalOld[iPad]);
- }
- if (fVerbose > 3) {
- printf(" iTimeBin = %d, timeResponse = %f\n"
- ,iTimeBin,timeResponse);
- printf(" pad-signal = %f, %f, %f\n"
- ,signalOld[0],signalOld[1],signalOld[2]);
- }
- // Store the track index in the dictionary
- // Note: We store index+1 in order to allow the array to be compressed
- for (iDict = 0; iDict < kNDict; iDict++) {
- Int_t oldTrack = dictionary[iDict]->GetData(rowE,colE,timeE);
- if (oldTrack == track+1) break;
- //if (oldTrack == -1) break;
- if (oldTrack == 0) {
- dictionary[iDict]->SetData(rowE,colE,timeE,track+1);
- if (fVerbose > 3) {
- printf(" track index = %d\n",track);
- }
- break;
+ // Add the signals
+ // Note: The time bin number is shifted by nTimeBefore to avoid negative
+ // time bins. This has to be subtracted later.
+ Int_t iCurrentTimeBin = iTimeBin + nTimeBefore;
+ signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iCurrentTimeBin);
+ signalOld[iPad] += padSignal[iPad] * timeResponse;
+ signals->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,signalOld[iPad]);
+
+ // Store the track index in the dictionary
+ // Note: We store index+1 in order to allow the array to be compressed
+ if (signalOld[iPad] > 0) {
+ for (iDict = 0; iDict < kNDict; iDict++) {
+ Int_t oldTrack = dictionary[iDict]->GetDataUnchecked(rowE
+ ,colPos
+ ,iCurrentTimeBin);
+ if (oldTrack == track+1) break;
+ if (oldTrack == 0) {
+ dictionary[iDict]->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,track+1);
+ break;
+ }
+ }
}
- }
- if ((fVerbose > 1) && (iDict == kNDict)) {
- printf("AliTRDdigitizer::MakeDigits -- ");
- printf("More than three tracks for one digit!\n");
- }
+
+ }
}
printf("AliTRDdigitizer::MakeDigits -- ");
printf("Finished analyzing %d hits\n",countHits);
+ // The total conversion factor
+ Float_t convert = kEl2fC * fPadCoupling * fTimeCoupling * fChipGain;
+
// Loop through all chambers to finalize the digits
for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
- Int_t plane = fGeo->GetPlane(iDet);
- Int_t sector = fGeo->GetSector(iDet);
- Int_t chamber = fGeo->GetChamber(iDet);
- Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector);
- Int_t nColMax = fGeo->GetColMax(plane);
- Int_t nTimeMax = fGeo->GetTimeMax();
+ Int_t plane = fGeo->GetPlane(iDet);
+ Int_t sector = fGeo->GetSector(iDet);
+ Int_t chamber = fGeo->GetChamber(iDet);
+ Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector);
+ Int_t nColMax = fGeo->GetColMax(plane);
+ Int_t nTimeMax = fGeo->GetTimeMax();
+ Int_t nTimeTotal = fGeo->GetTimeTotal();
- if (!(CheckDetector(plane,chamber,sector))) continue;
if (fVerbose > 0) {
printf("AliTRDdigitizer::MakeDigits -- ");
printf("Digitization for chamber %d\n",iDet);
// Add a container for the digits of this detector
digits = fDigits->GetDigits(iDet);
// Allocate memory space for the digits buffer
- digits->Allocate(nRowMax,nColMax,nTimeMax);
+ digits->Allocate(nRowMax,nColMax,nTimeTotal);
// Get the signal container
signals = (AliTRDdataArrayF *) signalsArray->At(iDet);
if (signals->GetNtime() == 0) {
// Create missing containers
- signals->Allocate(nRowMax,nColMax,nTimeMax);
+ signals->Allocate(nRowMax,nColMax,nTimeTotal);
}
else {
// Expand the container if neccessary
for (iDict = 0; iDict < kNDict; iDict++) {
dictionary[iDict] = fDigits->GetDictionary(iDet,iDict);
if (dictionary[iDict]->GetNtime() == 0) {
- dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeMax);
+ dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
}
}
Int_t nDigits = 0;
- // Create the digits for this chamber
- for (iRow = 0; iRow < nRowMax; iRow++ ) {
- for (iCol = 0; iCol < nColMax; iCol++ ) {
- for (iTime = 0; iTime < nTimeMax; iTime++) {
-
- Float_t signalAmp = signals->GetData(iRow,iCol,iTime);
-
- // Add the noise
- signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,fNoise),0.0);
- // Convert to fC
- signalAmp *= kEl2fC;
- // Convert to mV
- signalAmp *= fChipGain;
- // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
- // signal is larger than fADCinRange
- Int_t adc = 0;
- if (signalAmp >= fADCinRange) {
- adc = ((Int_t) fADCoutRange);
- }
- else {
- adc = ((Int_t) (signalAmp * (fADCoutRange / fADCinRange)));
- }
- if (fVerbose > 2) {
- printf(" iRow = %d, iCol = %d, iTime = %d\n"
- ,iRow,iCol,iTime);
- printf(" signal = %f, adc = %d\n",signalAmp,adc);
- }
+ // Don't create noise in detectors that are switched off
+ if (CheckDetector(plane,chamber,sector)) {
- // Store the amplitude of the digit if above threshold
- if (adc > fADCthreshold) {
- nDigits++;
- digits->SetData(iRow,iCol,iTime,adc);
- }
+ // Create the digits for this chamber
+ for (iRow = 0; iRow < nRowMax; iRow++ ) {
+ for (iCol = 0; iCol < nColMax; iCol++ ) {
+ for (iTime = 0; iTime < nTimeTotal; iTime++) {
- }
+ // Create summable digits
+ if (fSDigits) {
+
+ Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
+ Int_t adc = 0;
+ if (signalAmp >= fSinRange) {
+ adc = ((Int_t) fSoutRange);
+ }
+ else {
+ adc = ((Int_t) (signalAmp * (fSoutRange / fSinRange)));
+ }
+ nDigits++;
+ digits->SetDataUnchecked(iRow,iCol,iTime,adc);
+
+ }
+ // Create normal digits
+ else {
+
+ Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
+
+ // Add the noise
+ signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,fNoise),0.0);
+ // Convert to mV
+ signalAmp *= convert;
+ // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
+ // signal is larger than fADCinRange
+ Int_t adc = 0;
+ if (signalAmp >= fADCinRange) {
+ adc = ((Int_t) fADCoutRange);
+ }
+ else {
+ adc = ((Int_t) (signalAmp * (fADCoutRange / fADCinRange)));
+ }
+
+ // Store the amplitude of the digit if above threshold
+ if (adc > fADCthreshold) {
+ if (fVerbose > 2) {
+ printf(" iRow = %d, iCol = %d, iTime = %d\n"
+ ,iRow,iCol,iTime);
+ printf(" signal = %f, adc = %d\n",signalAmp,adc);
+ }
+ nDigits++;
+ digits->SetDataUnchecked(iRow,iCol,iTime,adc);
+ }
+
+ }
+
+ }
+ }
}
+
}
// Compress the arrays
totalSizeDict1 += dictionary[1]->GetSize();
totalSizeDict2 += dictionary[2]->GetSize();
+ Float_t nPixel = nRowMax * nColMax * nTimeMax;
printf("AliTRDdigitizer::MakeDigits -- ");
- printf("Found %d digits in detector %d.\n",nDigits,iDet);
+ printf("Found %d digits in detector %d (%3.0f).\n"
+ ,nDigits,iDet
+ ,100.0 * ((Float_t) nDigits) / nPixel);
if (fCompress) signals->Compress(1,0);
if ((fTRD->GetSensChamber() >= 0) &&
(fTRD->GetSensChamber() != chamber)) return kFALSE;
if ((fTRD->GetSensPlane() >= 0) &&
- (fTRD->GetSensPlane() != sector)) return kFALSE;
+ (fTRD->GetSensPlane() != plane)) return kFALSE;
if ( fTRD->GetSensSector() >= 0) {
Int_t sens1 = fTRD->GetSensSector();
Int_t sens2 = sens1 + fTRD->GetSensSectorRange();
// Create the branches
if (!(gAlice->TreeD()->GetBranch("TRDdigits"))) {
- if (!fDigits->MakeBranch()) return kFALSE;
+ return kFALSE;
}
// Store the digits and the dictionary in the tree
fDigits->WriteDigits();
// Write the new tree into the input file (use overwrite option)
- Char_t treeName[7];
+ Char_t treeName[15];
sprintf(treeName,"TreeD%d",fEvent);
printf("AliTRDdigitizer::WriteDigits -- ");
printf("Write the digits tree %s for event %d.\n"
,treeName,fEvent);
- gAlice->TreeD()->Write(treeName,2);
+ gAlice->TreeD()->Write(treeName,TObject::kOverwrite);
return kTRUE;
}
//_____________________________________________________________________________
-void AliTRDdigitizer::SetPRF(TF1 *prf)
+Float_t AliTRDdigitizer::GetDiffusionL(Float_t vd, Float_t b)
{
//
- // Defines a new pad response function
+ // Returns the longitudinal diffusion coefficient for a given drift
+ // velocity <vd> and a B-field <b> for Xe/CO2 (15%).
+ // The values are according to a GARFIELD simulation.
//
- if (fPRF) delete fPRF;
- fPRF = prf;
+ const Int_t kNb = 5;
+ Float_t p0[kNb] = { 0.007440, 0.007493, 0.007513, 0.007672, 0.007831 };
+ Float_t p1[kNb] = { 0.019252, 0.018912, 0.018636, 0.018012, 0.017343 };
+ Float_t p2[kNb] = { -0.005042, -0.004926, -0.004867, -0.004650, -0.004424 };
+ Float_t p3[kNb] = { 0.000195, 0.000189, 0.000195, 0.000182, 0.000169 };
+
+ Int_t ib = ((Int_t) (10 * (b - 0.15)));
+ ib = TMath::Max( 0,ib);
+ ib = TMath::Min(kNb,ib);
+
+ Float_t diff = p0[ib]
+ + p1[ib] * vd
+ + p2[ib] * vd*vd
+ + p3[ib] * vd*vd*vd;
+
+ return diff;
}
//_____________________________________________________________________________
-void AliTRDdigitizer::SetTRF(TF1 *trf)
+Float_t AliTRDdigitizer::GetDiffusionT(Float_t vd, Float_t b)
{
//
- // Defines a new time response function
+ // Returns the transverse diffusion coefficient for a given drift
+ // velocity <vd> and a B-field <b> for Xe/CO2 (15%).
+ // The values are according to a GARFIELD simulation.
//
- if (fTRF) delete fTRF;
- fTRF = trf;
+ const Int_t kNb = 5;
+ Float_t p0[kNb] = { 0.009550, 0.009599, 0.009674, 0.009757, 0.009850 };
+ Float_t p1[kNb] = { 0.006667, 0.006539, 0.006359, 0.006153, 0.005925 };
+ Float_t p2[kNb] = { -0.000853, -0.000798, -0.000721, -0.000635, -0.000541 };
+ Float_t p3[kNb] = { 0.000131, 0.000122, 0.000111, 0.000098, 0.000085 };
+
+ Int_t ib = ((Int_t) (10 * (b - 0.15)));
+ ib = TMath::Max( 0,ib);
+ ib = TMath::Min(kNb,ib);
+
+ Float_t diff = p0[ib]
+ + p1[ib] * vd
+ + p2[ib] * vd*vd
+ + p3[ib] * vd*vd*vd;
+
+ return diff;
}
//_____________________________________________________________________________
-Double_t TRFlandau(Double_t *x, Double_t *par)
+Float_t AliTRDdigitizer::GetOmegaTau(Float_t vd, Float_t b)
{
+ //
+ // Returns omega*tau (tan(Lorentz-angle)) for a given drift velocity <vd>
+ // and a B-field <b> for Xe/CO2 (15%).
+ // The values are according to a GARFIELD simulation.
+ //
+
+ const Int_t kNb = 5;
+ Float_t p0[kNb] = { 0.004810, 0.007412, 0.010252, 0.013409, 0.016888 };
+ Float_t p1[kNb] = { 0.054875, 0.081534, 0.107333, 0.131983, 0.155455 };
+ Float_t p2[kNb] = { -0.008682, -0.012896, -0.016987, -0.020880, -0.024623 };
+ Float_t p3[kNb] = { 0.000155, 0.000238, 0.000330, 0.000428, 0.000541 };
- Double_t xx = x[0];
- Double_t landau = par[0] * TMath::Landau(xx,par[1],par[2]);
+ Int_t ib = ((Int_t) (10 * (b - 0.15)));
+ ib = TMath::Max( 0,ib);
+ ib = TMath::Min(kNb,ib);
- return landau;
+ Float_t alphaL = p0[ib]
+ + p1[ib] * vd
+ + p2[ib] * vd*vd
+ + p3[ib] * vd*vd*vd;
+
+ return TMath::Tan(alphaL);
}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff