1 /**************************************************************************
2 * Copyright(c) 1998-1999, 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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // Creates and handles digits from TRD hits //
21 // Authors: C. Blume (blume@ikf.uni-frankfurt.de) //
25 // The following effects are included: //
28 // - Gas gain including fluctuations //
29 // - Pad-response (simple Gaussian approximation) //
31 // - Electronics noise //
32 // - Electronics gain //
35 // The corresponding parameter can be adjusted via the various //
36 // Set-functions. If these parameters are not explicitly set, default //
37 // values are used (see Init-function). //
39 ///////////////////////////////////////////////////////////////////////////////
52 #include <TGeoManager.h>
55 #include "AliRunLoader.h"
56 #include "AliLoader.h"
57 #include "AliConfig.h"
59 #include "AliRunDigitizer.h"
60 #include "AliRunLoader.h"
61 #include "AliLoader.h"
65 #include "AliTRDhit.h"
66 #include "AliTRDdigitizer.h"
67 #include "AliTRDdataArrayI.h"
68 #include "AliTRDdataArrayF.h"
69 #include "AliTRDsegmentArray.h"
70 #include "AliTRDdigitsManager.h"
71 #include "AliTRDgeometry.h"
72 #include "AliTRDpadPlane.h"
73 #include "AliTRDcalibDB.h"
74 #include "AliTRDSimParam.h"
75 #include "AliTRDCommonParam.h"
77 #include "Cal/AliTRDCalROC.h"
78 #include "Cal/AliTRDCalDet.h"
80 ClassImp(AliTRDdigitizer)
82 //_____________________________________________________________________________
83 AliTRDdigitizer::AliTRDdigitizer()
88 ,fSDigitsManagerList(0)
96 ,fMergeSignalOnly(kFALSE)
109 // AliTRDdigitizer default constructor
116 //_____________________________________________________________________________
117 AliTRDdigitizer::AliTRDdigitizer(const Text_t *name, const Text_t *title)
118 :AliDigitizer(name,title)
122 ,fSDigitsManagerList(0)
130 ,fMergeSignalOnly(kFALSE)
143 // AliTRDdigitizer constructor
150 //_____________________________________________________________________________
151 AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager
152 , const Text_t *name, const Text_t *title)
153 :AliDigitizer(manager,name,title)
157 ,fSDigitsManagerList(0)
165 ,fMergeSignalOnly(kFALSE)
178 // AliTRDdigitizer constructor
185 //_____________________________________________________________________________
186 AliTRDdigitizer::AliTRDdigitizer(AliRunDigitizer *manager)
187 :AliDigitizer(manager,"AliTRDdigitizer","TRD digitizer")
191 ,fSDigitsManagerList(0)
199 ,fMergeSignalOnly(kFALSE)
212 // AliTRDdigitizer constructor
219 //_____________________________________________________________________________
220 Bool_t AliTRDdigitizer::Init()
223 // Initialize the digitizer with default values
229 fSDigitsManagerList = 0;
237 fSDigitsScale = 100.0;
238 fMergeSignalOnly = kFALSE;
240 fTimeLastVdrift = -1;
246 fDiffLastVdrift = -1;
249 fLorentzFactor = 0.0;
251 return AliDigitizer::Init();
255 //_____________________________________________________________________________
256 AliTRDdigitizer::AliTRDdigitizer(const AliTRDdigitizer &d)
261 ,fSDigitsManagerList(0)
266 ,fCompress(d.fCompress)
267 ,fSDigits(d.fSDigits)
268 ,fSDigitsScale(d.fSDigitsScale)
269 ,fMergeSignalOnly(d.fMergeSignalOnly)
282 // AliTRDdigitizer copy constructor
285 // Do not copy timestructs, just invalidate lastvdrift.
286 // Next time they are requested, they get recalculated
287 if (((AliTRDdigitizer &) d).fTimeStruct1) {
288 delete [] ((AliTRDdigitizer &) d).fTimeStruct1;
289 ((AliTRDdigitizer &) d).fTimeStruct1 = 0;
291 if (((AliTRDdigitizer &) d).fTimeStruct2) {
292 delete [] ((AliTRDdigitizer &) d).fTimeStruct2;
293 ((AliTRDdigitizer &) d).fTimeStruct2 = 0;
298 //_____________________________________________________________________________
299 AliTRDdigitizer::~AliTRDdigitizer()
302 // AliTRDdigitizer destructor
305 if (fDigitsManager) {
306 delete fDigitsManager;
310 if (fDigitsManager) {
311 delete fSDigitsManager;
315 if (fSDigitsManagerList) {
316 fSDigitsManagerList->Delete();
317 delete fSDigitsManagerList;
318 fSDigitsManagerList = 0;
327 delete [] fTimeStruct1;
332 delete [] fTimeStruct2;
343 //_____________________________________________________________________________
344 AliTRDdigitizer &AliTRDdigitizer::operator=(const AliTRDdigitizer &d)
347 // Assignment operator
350 if (this != &d) ((AliTRDdigitizer &) d).Copy(*this);
356 //_____________________________________________________________________________
357 void AliTRDdigitizer::Copy(TObject &d) const
363 ((AliTRDdigitizer &) d).fRunLoader = 0;
364 ((AliTRDdigitizer &) d).fDigitsManager = 0;
365 ((AliTRDdigitizer &) d).fSDigitsManager = 0;
366 ((AliTRDdigitizer &) d).fSDigitsManagerList = 0;
367 ((AliTRDdigitizer &) d).fTRD = 0;
368 ((AliTRDdigitizer &) d).fGeo = 0;
369 ((AliTRDdigitizer &) d).fEvent = 0;
370 ((AliTRDdigitizer &) d).fMasks = 0;
371 ((AliTRDdigitizer &) d).fCompress = fCompress;
372 ((AliTRDdigitizer &) d).fSDigits = fSDigits;
373 ((AliTRDdigitizer &) d).fSDigitsScale = fSDigitsScale;
374 ((AliTRDdigitizer &) d).fMergeSignalOnly = fMergeSignalOnly;
376 AliTRDdigitizer& target = (AliTRDdigitizer &) d;
378 // Do not copy timestructs, just invalidate lastvdrift.
379 // Next time they are requested, they get recalculated
380 if (target.fTimeStruct1) {
381 delete [] target.fTimeStruct1;
382 target.fTimeStruct1 = 0;
384 if (target.fTimeStruct2) {
385 delete [] target.fTimeStruct2;
386 target.fTimeStruct2 = 0;
388 target.fTimeLastVdrift = -1;
392 //_____________________________________________________________________________
393 void AliTRDdigitizer::Exec(Option_t *option)
396 // Executes the merging
401 AliTRDdigitsManager *sdigitsManager;
403 TString optionString = option;
404 if (optionString.Contains("deb")) {
405 AliLog::SetClassDebugLevel("AliTRDdigitizer",1);
406 AliInfo("Called with debug option");
409 // The AliRoot file is already connected by the manager
413 AliDebug(1,"AliRun object found on file.");
416 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(0));
418 gAlice = inrl->GetAliRun();
420 AliError("Could not find AliRun object.")
425 Int_t nInput = fManager->GetNinputs();
426 fMasks = new Int_t[nInput];
427 for (iInput = 0; iInput < nInput; iInput++) {
428 fMasks[iInput] = fManager->GetMask(iInput);
435 AliRunLoader *orl = AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
437 if (InitDetector()) {
439 AliLoader *ogime = orl->GetLoader("TRDLoader");
443 // If we produce SDigits
444 tree = ogime->TreeS();
446 ogime->MakeTree("S");
447 tree = ogime->TreeS();
451 // If we produce Digits
452 tree = ogime->TreeD();
454 ogime->MakeTree("D");
455 tree = ogime->TreeD();
463 for (iInput = 0; iInput < nInput; iInput++) {
465 AliDebug(1,Form("Add input stream %d",iInput));
467 // Check if the input tree exists
468 inrl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
469 AliLoader *gime = inrl->GetLoader("TRDLoader");
471 TTree *treees = gime->TreeS();
473 if (gime->LoadSDigits()) {
474 AliError(Form("Error Occured while loading S. Digits for input %d.",iInput));
477 treees = gime->TreeS();
481 AliError(Form("Input stream %d does not exist",iInput));
485 // Read the s-digits via digits manager
486 sdigitsManager = new AliTRDdigitsManager();
487 sdigitsManager->SetSDigits(kTRUE);
489 AliRunLoader *rl = AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
490 AliLoader *gimme = rl->GetLoader("TRDLoader");
491 if (!gimme->TreeS()) {
492 gimme->LoadSDigits();
494 sdigitsManager->ReadDigits(gimme->TreeS());
496 // Add the s-digits to the input list
497 AddSDigitsManager(sdigitsManager);
501 // Convert the s-digits to normal digits
502 AliDebug(1,"Do the conversion");
506 AliDebug(1,"Write the digits");
507 fDigitsManager->WriteDigits();
514 DeleteSDigitsManager();
518 //_____________________________________________________________________________
519 Bool_t AliTRDdigitizer::Open(const Char_t *file, Int_t nEvent)
522 // Opens a ROOT-file with TRD-hits and reads in the hit-tree
524 // Connect the AliRoot file containing Geometry, Kine, and Hits
527 TString evfoldname = AliConfig::GetDefaultEventFolderName();
529 fRunLoader = AliRunLoader::GetRunLoader(evfoldname);
531 fRunLoader = AliRunLoader::Open(file,evfoldname,"UPDATE");
534 AliError(Form("Can not open session for file %s.",file));
538 if (!fRunLoader->GetAliRun()) {
539 fRunLoader->LoadgAlice();
541 gAlice = fRunLoader->GetAliRun();
544 AliDebug(1,"AliRun object found on file.");
547 AliError("Could not find AliRun object.");
553 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
555 AliError("Can not get TRD loader from Run Loader");
559 if (InitDetector()) {
562 // If we produce SDigits
563 tree = loader->TreeS();
565 loader->MakeTree("S");
566 tree = loader->TreeS();
570 // If we produce Digits
571 tree = loader->TreeD();
573 loader->MakeTree("D");
574 tree = loader->TreeD();
577 return MakeBranch(tree);
585 //_____________________________________________________________________________
586 Bool_t AliTRDdigitizer::Open(AliRunLoader *runLoader, Int_t nEvent)
589 // Opens a ROOT-file with TRD-hits and reads in the hit-tree
591 // Connect the AliRoot file containing Geometry, Kine, and Hits
594 fRunLoader = runLoader;
596 AliError("RunLoader does not exist");
600 if (!fRunLoader->GetAliRun()) {
601 fRunLoader->LoadgAlice();
603 gAlice = fRunLoader->GetAliRun();
606 AliDebug(1,"AliRun object found on file.");
609 AliError("Could not find AliRun object.");
615 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
617 AliError("Can not get TRD loader from Run Loader");
621 if (InitDetector()) {
624 // If we produce SDigits
625 tree = loader->TreeS();
627 loader->MakeTree("S");
628 tree = loader->TreeS();
632 // If we produce Digits
633 tree = loader->TreeD();
635 loader->MakeTree("D");
636 tree = loader->TreeD();
639 return MakeBranch(tree);
647 //_____________________________________________________________________________
648 Bool_t AliTRDdigitizer::InitDetector()
651 // Sets the pointer to the TRD detector and the geometry
654 // Get the pointer to the detector class and check for version 1
655 fTRD = (AliTRD *) gAlice->GetDetector("TRD");
657 AliFatal("No TRD module found");
660 if (fTRD->IsVersion() != 1) {
661 AliFatal("TRD must be version 1 (slow simulator)");
666 fGeo = new AliTRDgeometry();
668 // Create a digits manager
669 delete fDigitsManager;
670 fDigitsManager = new AliTRDdigitsManager();
671 fDigitsManager->SetSDigits(fSDigits);
672 fDigitsManager->CreateArrays();
673 fDigitsManager->SetEvent(fEvent);
675 // The list for the input s-digits manager to be merged
676 if (fSDigitsManagerList) {
677 fSDigitsManagerList->Delete();
680 fSDigitsManagerList = new TList();
687 //_____________________________________________________________________________
688 Bool_t AliTRDdigitizer::MakeBranch(TTree *tree) const
691 // Create the branches for the digits array
694 return fDigitsManager->MakeBranch(tree);
698 //_____________________________________________________________________________
699 Bool_t AliTRDdigitizer::MakeDigits()
705 ///////////////////////////////////////////////////////////////
707 ///////////////////////////////////////////////////////////////
709 // Converts number of electrons to fC
710 const Double_t kEl2fC = 1.602e-19 * 1.0e15;
712 ///////////////////////////////////////////////////////////////
714 // Number of pads included in the pad response
715 const Int_t kNpad = 3;
717 // Number of track dictionary arrays
718 const Int_t kNDict = AliTRDdigitsManager::kNDict;
720 // Width of the amplification region
721 const Float_t kAmWidth = AliTRDgeometry::AmThick();
722 // Width of the drift region
723 const Float_t kDrWidth = AliTRDgeometry::DrThick();
724 // Drift + amplification region
725 const Float_t kDrMin = - 0.5 * kAmWidth;
726 const Float_t kDrMax = kDrWidth + 0.5 * kAmWidth;
735 Int_t totalSizeDigits = 0;
736 Int_t totalSizeDict0 = 0;
737 Int_t totalSizeDict1 = 0;
738 Int_t totalSizeDict2 = 0;
740 Int_t timeBinTRFend = 1;
744 Double_t padSignal[kNpad];
745 Double_t signalOld[kNpad];
747 AliTRDdataArrayF *signals = 0;
748 AliTRDdataArrayI *digits = 0;
749 AliTRDdataArrayI *dictionary[kNDict];
751 AliTRDpadPlane *padPlane = 0;
753 AliTRDCalROC *calVdriftROC = 0;
754 Float_t calVdriftDetValue = 0.0;
755 AliTRDCalROC *calT0ROC = 0;
756 Float_t calT0DetValue = 0.0;
757 AliTRDCalROC *calGainFactorROC = 0;
758 Float_t calGainFactorDetValue = 0.0;
761 AliFatal("No geometry manager!");
765 AliError("No geometry defined");
768 fGeo->ReadGeoMatrices();
770 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
772 AliFatal("Could not get simulation parameters");
776 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
778 AliFatal("Could not get common parameterss");
782 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
784 AliFatal("Could not get calibration object");
788 AliDebug(1,"Start creating digits");
790 // Create a container for the amplitudes
791 AliTRDsegmentArray *signalsArray = new AliTRDsegmentArray("AliTRDdataArrayF"
792 ,AliTRDgeometry::Ndet());
794 AliLoader *gimme = fRunLoader->GetLoader("TRDLoader");
795 if (!gimme->TreeH()) {
798 TTree *hitTree = gimme->TreeH();
799 if (hitTree == 0x0) {
800 AliError("Can not get TreeH");
803 fTRD->SetTreeAddress();
805 // Get the number of entries in the hit tree
806 // (Number of primary particles creating a hit somewhere)
807 Int_t nTrack = (Int_t) hitTree->GetEntries();
808 AliDebug(1,Form("Found %d primary particles",nTrack));
809 AliDebug(1,Form("Sampling = %.0fMHz" ,commonParam->GetSamplingFrequency()));
810 AliDebug(1,Form("Gain = %d" ,((Int_t) simParam->GetGasGain())));
811 AliDebug(1,Form("Noise = %d" ,((Int_t) simParam->GetNoise())));
812 if (simParam->TimeStructOn()) {
813 AliDebug(1,"Time Structure of drift cells implemented.");
816 AliDebug(1,"Constant drift velocity in drift cells.");
818 if (simParam->TRFOn()) {
819 timeBinTRFend = ((Int_t) (simParam->GetTRFhi()
820 * commonParam->GetSamplingFrequency())) - 1;
821 AliDebug(1,Form("Sample the TRF up to bin %d",timeBinTRFend));
824 // Get the detector wise calibration objects
825 const AliTRDCalDet *calVdriftDet = calibration->GetVdriftDet();
826 const AliTRDCalDet *calT0Det = calibration->GetT0Det();
827 const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
829 Int_t detectorOld = -1;
832 Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
833 Float_t samplingRate = commonParam->GetSamplingFrequency();
834 Float_t elAttachProp = simParam->GetElAttachProp() / 100.0;
836 // Loop through all entries in the tree
837 for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) {
840 nBytes += hitTree->GetEvent(iTrack);
842 // Loop through the TRD hits
844 AliTRDhit *hit = (AliTRDhit *) fTRD->FirstHit(-1);
850 Float_t q = hit->GetCharge();
851 // Don't analyze test hits
852 if (((Int_t) q) == 0) {
853 hit = (AliTRDhit *) fTRD->NextHit();
860 Int_t track = hit->Track();
861 Int_t detector = hit->GetDetector();
862 Float_t hittime = hit->GetTime();
863 Int_t plane = fGeo->GetPlane(detector);
864 Int_t chamber = fGeo->GetChamber(detector);
865 padPlane = fGeo->GetPadPlane(plane,chamber);
866 Float_t row0 = padPlane->GetRow0ROC();
867 Int_t nRowMax = padPlane->GetNrows();
868 Int_t nColMax = padPlane->GetNcols();
871 // Find the current volume with the geo manager
872 gGeoManager->SetCurrentPoint(pos);
873 gGeoManager->FindNode();
874 if (strstr(gGeoManager->GetPath(),"/UK")) {
878 if (detector != detectorOld) {
880 // Compress the old one if enabled
881 if ((fCompress) && (detectorOld > -1)) {
882 signals->Compress(1,0);
883 for (iDict = 0; iDict < kNDict; iDict++) {
884 dictionary[iDict]->Compress(1,0);
887 // Get the new container
888 signals = (AliTRDdataArrayF *) signalsArray->At(detector);
889 if (signals->GetNtime() == 0) {
890 // Allocate a new one if not yet existing
891 signals->Allocate(nRowMax,nColMax,nTimeTotal);
894 // Expand an existing one
899 // The same for the dictionary
900 for (iDict = 0; iDict < kNDict; iDict++) {
901 dictionary[iDict] = fDigitsManager->GetDictionary(detector,iDict);
902 if (dictionary[iDict]->GetNtime() == 0) {
903 dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
906 if (fCompress) dictionary[iDict]->Expand();
910 // Get the calibration objects
911 calVdriftROC = calibration->GetVdriftROC(detector);
912 calVdriftDetValue = calVdriftDet->GetValue(detector);
913 calT0ROC = calibration->GetT0ROC(detector);
914 calT0DetValue = calT0Det->GetValue(detector);
916 detectorOld = detector;
920 // Go to the local coordinate system:
921 // loc[0] - col direction in amplification or driftvolume
922 // loc[1] - row direction in amplification or driftvolume
923 // loc[2] - time direction in amplification or driftvolume
924 gGeoManager->MasterToLocal(pos,loc);
926 // Relative to middle of amplification region
927 loc[2] = loc[2] - kDrWidth/2.0 - kAmWidth/2.0;
930 // The driftlength [cm] (w/o diffusion yet !).
931 // It is negative if the hit is between pad plane and anode wires.
932 Double_t driftlength = -1.0 * loc[2];
934 // Stupid patch to take care of TR photons that are absorbed
935 // outside the chamber volume. A real fix would actually need
936 // a more clever implementation of the TR hit generation
938 if ((loc[1] < padPlane->GetRowEndROC()) ||
939 (loc[1] > padPlane->GetRow0ROC())) {
940 hit = (AliTRDhit *) fTRD->NextHit();
943 if ((driftlength < kDrMin) ||
944 (driftlength > kDrMax)) {
945 hit = (AliTRDhit *) fTRD->NextHit();
950 // Get row and col of unsmeared electron to retrieve drift velocity
951 // The pad row (z-direction)
952 Int_t rowE = padPlane->GetPadRowNumberROC(loc[1]);
954 hit = (AliTRDhit *) fTRD->NextHit();
957 Double_t rowOffset = padPlane->GetPadRowOffsetROC(rowE,loc[1]);
959 // The pad column (rphi-direction)
960 Double_t offsetTilt = padPlane->GetTiltOffset(rowOffset);
961 Int_t colE = padPlane->GetPadColNumber(loc[0]+offsetTilt);
963 hit = (AliTRDhit *) fTRD->NextHit();
966 Double_t colOffset = padPlane->GetPadColOffset(colE,loc[0]+offsetTilt);
968 Float_t driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
970 // Normalized drift length
971 Double_t absdriftlength = TMath::Abs(driftlength);
972 if (commonParam->ExBOn()) {
973 absdriftlength /= TMath::Sqrt(GetLorentzFactor(driftvelocity));
976 // Loop over all electrons of this hit
977 // TR photons produce hits with negative charge
978 Int_t nEl = ((Int_t) TMath::Abs(q));
979 for (Int_t iEl = 0; iEl < nEl; iEl++) {
981 // Now the real local coordinate system of the ROC
982 // column direction: locC
983 // row direction: locR
984 // time direction: locT
985 // locR and locC are identical to the coordinates of the corresponding
986 // volumina of the drift or amplification region.
987 // locT is defined relative to the wire plane (i.e. middle of amplification
988 // region), meaming locT = 0, and is negative for hits coming from the
990 Double_t locC = loc[0];
991 Double_t locR = loc[1];
992 Double_t locT = loc[2];
994 // Electron attachment
995 if (simParam->ElAttachOn()) {
996 if (gRandom->Rndm() < (absdriftlength * elAttachProp)) {
1001 // Apply the diffusion smearing
1002 if (simParam->DiffusionOn()) {
1003 if (!(Diffusion(driftvelocity,absdriftlength,locR,locC,locT))) {
1008 // Apply E x B effects (depends on drift direction)
1009 if (commonParam->ExBOn()) {
1010 if (!(ExB(driftvelocity,driftlength,locC))) {
1015 // The electron position after diffusion and ExB in pad coordinates.
1016 // The pad row (z-direction)
1017 rowE = padPlane->GetPadRowNumberROC(locR);
1018 if (rowE < 0) continue;
1019 rowOffset = padPlane->GetPadRowOffsetROC(rowE,locR);
1021 // The pad column (rphi-direction)
1022 offsetTilt = padPlane->GetTiltOffset(rowOffset);
1023 colE = padPlane->GetPadColNumber(locC+offsetTilt);
1024 if (colE < 0) continue;
1025 colOffset = padPlane->GetPadColOffset(colE,locC+offsetTilt);
1027 // Also re-retrieve drift velocity because col and row may have changed
1028 driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
1029 Float_t t0 = calT0DetValue + calT0ROC->GetValue(colE,rowE);
1031 // Convert the position to drift time [mus], using either constant drift velocity or
1032 // time structure of drift cells (non-isochronity, GARFIELD calculation).
1033 // Also add absolute time of hits to take pile-up events into account properly
1035 if (simParam->TimeStructOn()) {
1036 // Get z-position with respect to anode wire
1037 Double_t zz = row0 - locR + simParam->GetAnodeWireOffset();
1038 zz -= ((Int_t)(2 * zz)) / 2.0;
1042 // Use drift time map (GARFIELD)
1043 drifttime = TimeStruct(driftvelocity,0.5*kAmWidth-1.0*locT,zz)
1047 // Use constant drift velocity
1048 drifttime = -1.0 * locT / driftvelocity
1052 // Apply the gas gain including fluctuations
1053 Double_t ggRndm = 0.0;
1055 ggRndm = gRandom->Rndm();
1056 } while (ggRndm <= 0);
1057 Int_t signal = (Int_t) (-(simParam->GetGasGain()) * TMath::Log(ggRndm));
1059 // Apply the pad response
1060 if (simParam->PRFOn()) {
1061 // The distance of the electron to the center of the pad
1062 // in units of pad width
1063 Double_t dist = (colOffset - 0.5*padPlane->GetColSize(colE))
1064 / padPlane->GetColSize(colE);
1065 // This is still the fixed parametrization, i.e. not dependent on
1066 // calibration values !!!!
1067 if (!(calibration->PadResponse(signal,dist,plane,padSignal))) continue;
1071 padSignal[1] = signal;
1075 // The time bin (always positive), with t0 distortion
1076 Double_t timeBinIdeal = drifttime * samplingRate + t0;
1078 if (TMath::Abs(timeBinIdeal) > 2*nTimeTotal) {
1079 timeBinIdeal = 2 * nTimeTotal;
1081 Int_t timeBinTruncated = (Int_t) timeBinIdeal;
1082 // The distance of the position to the middle of the timebin
1083 Double_t timeOffset = ((Float_t) timeBinTruncated
1084 + 0.5 - timeBinIdeal) / samplingRate;
1086 // Sample the time response inside the drift region
1087 // + additional time bins before and after.
1088 // The sampling is done always in the middle of the time bin
1089 for (Int_t iTimeBin = TMath::Max(timeBinTruncated,0)
1090 ;iTimeBin < TMath::Min(timeBinTruncated+timeBinTRFend,nTimeTotal)
1093 // Apply the time response
1094 Double_t timeResponse = 1.0;
1095 Double_t crossTalk = 0.0;
1096 Double_t time = (iTimeBin - timeBinTruncated) / samplingRate + timeOffset;
1097 if (simParam->TRFOn()) {
1098 timeResponse = simParam->TimeResponse(time);
1100 if (simParam->CTOn()) {
1101 crossTalk = simParam->CrossTalk(time);
1108 for (iPad = 0; iPad < kNpad; iPad++) {
1110 Int_t colPos = colE + iPad - 1;
1111 if (colPos < 0) continue;
1112 if (colPos >= nColMax) break;
1115 Int_t iCurrentTimeBin = iTimeBin;
1116 signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iCurrentTimeBin);
1117 if (colPos != colE) {
1118 signalOld[iPad] += padSignal[iPad] * (timeResponse + crossTalk);
1121 signalOld[iPad] += padSignal[iPad] * timeResponse;
1123 signals->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,signalOld[iPad]);
1125 // Store the track index in the dictionary
1126 // Note: We store index+1 in order to allow the array to be compressed
1127 if (signalOld[iPad] > 0) {
1128 for (iDict = 0; iDict < kNDict; iDict++) {
1129 Int_t oldTrack = dictionary[iDict]->GetDataUnchecked(rowE
1132 if (oldTrack == track+1) break;
1133 if (oldTrack == 0) {
1134 dictionary[iDict]->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,track+1);
1142 } // Loop: time bins
1144 } // Loop: electrons of a single hit
1146 hit = (AliTRDhit *) fTRD->NextHit();
1148 } // Loop: hits of one primary track
1150 } // Loop: primary tracks
1152 AliDebug(1,Form("Finished analyzing %d hits",countHits));
1154 //____________________________________________________________________
1157 //____________________________________________________________________
1160 // The coupling factor
1161 Double_t coupling = simParam->GetPadCoupling()
1162 * simParam->GetTimeCoupling();
1164 // The conversion factor
1165 Double_t convert = kEl2fC
1166 * simParam->GetChipGain();
1168 // Loop through all chambers to finalize the digits
1170 Int_t iDetEnd = AliTRDgeometry::Ndet();
1171 for (Int_t iDet = iDetBeg; iDet < iDetEnd; iDet++) {
1173 Int_t plane = fGeo->GetPlane(iDet);
1174 Int_t sector = fGeo->GetSector(iDet);
1175 Int_t chamber = fGeo->GetChamber(iDet);
1176 Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector);
1177 Int_t nColMax = fGeo->GetColMax(plane);
1179 Double_t *inADC = new Double_t[nTimeTotal];
1180 Double_t *outADC = new Double_t[nTimeTotal];
1182 // Add a container for the digits of this detector
1183 digits = fDigitsManager->GetDigits(iDet);
1184 // Allocate memory space for the digits buffer
1185 if (digits->GetNtime() == 0) {
1186 digits->Allocate(nRowMax,nColMax,nTimeTotal);
1189 // Get the signal container
1190 signals = (AliTRDdataArrayF *) signalsArray->At(iDet);
1191 if (signals->GetNtime() == 0) {
1192 // Create missing containers
1193 signals->Allocate(nRowMax,nColMax,nTimeTotal);
1196 // Expand the container if neccessary
1197 if (fCompress) signals->Expand();
1199 // Create the missing dictionary containers
1200 for (iDict = 0; iDict < kNDict; iDict++) {
1201 dictionary[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
1202 if (dictionary[iDict]->GetNtime() == 0) {
1203 dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
1209 // Don't create noise in detectors that are switched off / not installed, etc.
1210 if (( calibration->IsChamberInstalled(iDet)) &&
1211 (!calibration->IsChamberMasked(iDet)) &&
1212 ( fGeo->GetSMstatus(sector))) {
1214 // Get the calibration objects
1215 calGainFactorROC = calibration->GetGainFactorROC(iDet);
1216 calGainFactorDetValue = calGainFactorDet->GetValue(iDet);
1218 // Create the digits for this chamber
1219 for (iRow = 0; iRow < nRowMax; iRow++ ) {
1220 for (iCol = 0; iCol < nColMax; iCol++ ) {
1222 // Check whether pad is masked
1223 // Bridged pads are not considered yet!!!
1224 if (calibration->IsPadMasked(iDet,iCol,iRow)) {
1228 // Create summable digits
1231 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1232 Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
1233 signalAmp *= fSDigitsScale;
1234 signalAmp = TMath::Min(signalAmp,(Float_t) 1.0e9);
1235 Int_t adc = (Int_t) signalAmp;
1236 if (adc > 0) nDigits++;
1237 digits->SetDataUnchecked(iRow,iCol,iTime,adc);
1241 // Create normal digits
1244 Float_t padgain = calGainFactorDetValue
1245 * calGainFactorROC->GetValue(iCol,iRow);
1247 AliError(Form("Not a valid gain %f, %d %d %d",padgain,iDet,iCol,iRow));
1250 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1252 Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
1254 // Pad and time coupling
1255 signalAmp *= coupling;
1257 signalAmp *= padgain;
1259 // Add the noise, starting from minus ADC baseline in electrons
1260 Double_t baselineEl = simParam->GetADCbaseline()
1261 * (simParam->GetADCinRange() / simParam->GetADCoutRange())
1263 signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,simParam->GetNoise())
1266 signalAmp *= convert;
1267 // Add ADC baseline in mV
1268 signalAmp += simParam->GetADCbaseline()
1269 * (simParam->GetADCinRange() / simParam->GetADCoutRange());
1270 // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
1271 // signal is larger than fADCinRange
1273 if (signalAmp >= simParam->GetADCinRange()) {
1274 adc = ((Int_t) simParam->GetADCoutRange());
1277 adc = TMath::Nint(signalAmp * (simParam->GetADCoutRange()
1278 / simParam->GetADCinRange()));
1282 outADC[iTime] = adc;
1286 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1287 // Store the amplitude of the digit if above threshold
1288 if (outADC[iTime] > (simParam->GetADCbaseline() + simParam->GetADCthreshold())) {
1290 digits->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
1301 // Compress the arrays
1302 digits->Compress(1,0);
1303 for (iDict = 0; iDict < kNDict; iDict++) {
1304 dictionary[iDict]->Compress(1,0);
1307 totalSizeDigits += digits->GetSize();
1308 totalSizeDict0 += dictionary[0]->GetSize();
1309 totalSizeDict1 += dictionary[1]->GetSize();
1310 totalSizeDict2 += dictionary[2]->GetSize();
1313 Float_t nPixel = nRowMax * nColMax * nTimeTotal;
1314 AliDebug(1,Form("Found %d digits in detector %d (%3.0f)."
1316 ,100.0 * ((Float_t) nDigits) / nPixel));
1320 signals->Compress(1,0);
1329 delete signalsArray;
1333 AliDebug(1,Form("Total number of analyzed hits = %d",countHits));
1334 AliDebug(1,Form("Total digits data size = %d, %d, %d, %d",totalSizeDigits
1343 //_____________________________________________________________________________
1344 void AliTRDdigitizer::AddSDigitsManager(AliTRDdigitsManager *man)
1347 // Add a digits manager for s-digits to the input list.
1350 fSDigitsManagerList->Add(man);
1354 //_____________________________________________________________________________
1355 void AliTRDdigitizer::DeleteSDigitsManager()
1358 // Removes digits manager from the input list.
1361 fSDigitsManagerList->Delete();
1365 //_____________________________________________________________________________
1366 Bool_t AliTRDdigitizer::ConvertSDigits()
1369 // Converts s-digits to normal digits
1372 // Number of track dictionary arrays
1373 const Int_t kNDict = AliTRDdigitsManager::kNDict;
1375 // Converts number of electrons to fC
1376 const Double_t kEl2fC = 1.602e-19 * 1.0e15;
1383 AliTRDCalROC *calGainFactorROC = 0;
1384 Float_t calGainFactorDetValue = 0.0;
1386 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
1388 AliFatal("Could not get simulation parameters");
1392 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
1394 AliFatal("Could not get calibration object");
1398 Double_t sDigitsScale = 1.0 / GetSDigitsScale();
1399 Double_t noise = simParam->GetNoise();
1400 Double_t padCoupling = simParam->GetPadCoupling();
1401 Double_t timeCoupling = simParam->GetTimeCoupling();
1402 Double_t chipGain = simParam->GetChipGain();
1403 Double_t coupling = padCoupling * timeCoupling;
1404 Double_t convert = kEl2fC * chipGain;
1405 Double_t adcInRange = simParam->GetADCinRange();
1406 Double_t adcOutRange = simParam->GetADCoutRange();
1407 Int_t adcThreshold = simParam->GetADCthreshold();
1408 Int_t adcBaseline = simParam->GetADCbaseline();
1409 Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
1411 AliTRDdataArrayI *digitsIn;
1412 AliTRDdataArrayI *digitsOut;
1413 AliTRDdataArrayI *dictionaryIn[kNDict];
1414 AliTRDdataArrayI *dictionaryOut[kNDict];
1416 // Get the detector wise calibration objects
1417 const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
1419 // Loop through the detectors
1420 for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
1422 Int_t plane = fGeo->GetPlane(iDet);
1423 Int_t sector = fGeo->GetSector(iDet);
1424 Int_t chamber = fGeo->GetChamber(iDet);
1425 Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector);
1426 Int_t nColMax = fGeo->GetColMax(plane);
1428 Double_t *inADC = new Double_t[nTimeTotal];
1429 Double_t *outADC = new Double_t[nTimeTotal];
1431 digitsIn = fSDigitsManager->GetDigits(iDet);
1433 digitsOut = fDigitsManager->GetDigits(iDet);
1434 digitsOut->Allocate(nRowMax,nColMax,nTimeTotal);
1435 for (iDict = 0; iDict < kNDict; iDict++) {
1436 dictionaryIn[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
1437 dictionaryIn[iDict]->Expand();
1438 dictionaryOut[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
1439 dictionaryOut[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
1442 // Don't create noise in detectors that are switched off / not installed, etc.
1443 if (( calibration->IsChamberInstalled(iDet)) &&
1444 (!calibration->IsChamberMasked(iDet)) &&
1445 ( fGeo->GetSMstatus(sector))) {
1447 // Get the calibration objects
1448 calGainFactorROC = calibration->GetGainFactorROC(iDet);
1449 calGainFactorDetValue = calGainFactorDet->GetValue(iDet);
1451 for (iRow = 0; iRow < nRowMax; iRow++ ) {
1452 for (iCol = 0; iCol < nColMax; iCol++ ) {
1454 // Check whether pad is masked
1455 // Bridged pads are not considered yet!!!
1456 if (calibration->IsPadMasked(iDet,iCol,iRow)) {
1460 Float_t padgain = calGainFactorDetValue
1461 * calGainFactorROC->GetValue(iCol,iRow);
1463 AliError(Form("Not a valid gain %f, %d %d %d",padgain,iDet,iCol,iRow));
1466 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1468 // Scale s-digits to normal digits
1469 Double_t signal = (Double_t) digitsIn->GetDataUnchecked(iRow,iCol,iTime);
1470 signal *= sDigitsScale;
1471 // Pad and time coupling
1475 // Add the noise, starting from minus ADC baseline in electrons
1476 Double_t baselineEl = adcBaseline * (adcInRange / adcOutRange) / convert;
1477 signal = TMath::Max((Double_t) gRandom->Gaus(signal,noise),-baselineEl);
1480 // add ADC baseline in mV
1481 signal += adcBaseline * (adcInRange / adcOutRange);
1482 // Convert to ADC counts. Set the overflow-bit adcOutRange if the
1483 // signal is larger than adcInRange
1485 if (signal >= adcInRange) {
1486 adc = ((Int_t) adcOutRange);
1489 adc = TMath::Nint(signal * (adcOutRange / adcInRange));
1492 outADC[iTime] = adc;
1496 for (iTime = 0; iTime < nTimeTotal; iTime++) {
1497 // Store the amplitude of the digit if above threshold
1498 if (outADC[iTime] > (adcBaseline + adcThreshold)) {
1499 digitsOut->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
1500 // Copy the dictionary
1501 for (iDict = 0; iDict < kNDict; iDict++) {
1502 Int_t track = dictionaryIn[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1503 dictionaryOut[iDict]->SetDataUnchecked(iRow,iCol,iTime,track);
1514 digitsIn->Compress(1,0);
1515 digitsOut->Compress(1,0);
1516 for (iDict = 0; iDict < kNDict; iDict++) {
1517 dictionaryIn[iDict]->Compress(1,0);
1518 dictionaryOut[iDict]->Compress(1,0);
1531 //_____________________________________________________________________________
1532 Bool_t AliTRDdigitizer::MergeSDigits()
1535 // Merges the input s-digits:
1536 // - The amplitude of the different inputs are summed up.
1537 // - Of the track IDs from the input dictionaries only one is
1538 // kept for each input. This works for maximal 3 different merged inputs.
1541 // Number of track dictionary arrays
1542 const Int_t kNDict = AliTRDdigitsManager::kNDict;
1544 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
1546 AliFatal("Could not get simulation parameters");
1550 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
1552 AliFatal("Could not get calibration object");
1559 AliTRDdataArrayI *digitsA;
1560 AliTRDdataArrayI *digitsB;
1561 AliTRDdataArrayI *dictionaryA[kNDict];
1562 AliTRDdataArrayI *dictionaryB[kNDict];
1564 // Get the first s-digits
1565 fSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->First();
1566 if (!fSDigitsManager) {
1567 AliError("No SDigits manager");
1571 // Loop through the other sets of s-digits
1572 AliTRDdigitsManager *mergeSDigitsManager;
1573 mergeSDigitsManager = (AliTRDdigitsManager *)
1574 fSDigitsManagerList->After(fSDigitsManager);
1576 if (mergeSDigitsManager) {
1577 AliDebug(1,Form("Merge %d input files.",fSDigitsManagerList->GetSize()));
1580 AliDebug(1,"Only one input file.");
1583 Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
1586 while (mergeSDigitsManager) {
1590 // Loop through the detectors
1591 for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) {
1593 Int_t plane = fGeo->GetPlane(iDet);
1594 Int_t sector = fGeo->GetSector(iDet);
1595 Int_t chamber = fGeo->GetChamber(iDet);
1596 Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector);
1597 Int_t nColMax = fGeo->GetColMax(plane);
1599 // Loop through the pixels of one detector and add the signals
1600 digitsA = fSDigitsManager->GetDigits(iDet);
1601 digitsB = mergeSDigitsManager->GetDigits(iDet);
1604 for (iDict = 0; iDict < kNDict; iDict++) {
1605 dictionaryA[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
1606 dictionaryB[iDict] = mergeSDigitsManager->GetDictionary(iDet,iDict);
1607 dictionaryA[iDict]->Expand();
1608 dictionaryB[iDict]->Expand();
1611 // Merge only detectors that contain a signal
1612 Bool_t doMerge = kTRUE;
1613 if (fMergeSignalOnly) {
1614 if (digitsA->GetOverThreshold(0) == 0) {
1621 AliDebug(1,Form("Merge detector %d of input no.%d",iDet,iMerge+1));
1623 for (Int_t iRow = 0; iRow < nRowMax; iRow++ ) {
1624 for (Int_t iCol = 0; iCol < nColMax; iCol++ ) {
1625 for (Int_t iTime = 0; iTime < nTimeTotal; iTime++) {
1627 // Add the amplitudes of the summable digits
1628 Int_t ampA = digitsA->GetDataUnchecked(iRow,iCol,iTime);
1629 Int_t ampB = digitsB->GetDataUnchecked(iRow,iCol,iTime);
1631 digitsA->SetDataUnchecked(iRow,iCol,iTime,ampA);
1633 // Add the mask to the track id if defined.
1634 for (iDict = 0; iDict < kNDict; iDict++) {
1635 Int_t trackB = dictionaryB[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1636 if ((fMasks) && (trackB > 0)) {
1637 for (jDict = 0; jDict < kNDict; jDict++) {
1638 Int_t trackA = dictionaryA[iDict]->GetDataUnchecked(iRow,iCol,iTime);
1640 trackA = trackB + fMasks[iMerge];
1641 dictionaryA[iDict]->SetDataUnchecked(iRow,iCol,iTime,trackA);
1654 digitsA->Compress(1,0);
1655 digitsB->Compress(1,0);
1656 for (iDict = 0; iDict < kNDict; iDict++) {
1657 dictionaryA[iDict]->Compress(1,0);
1658 dictionaryB[iDict]->Compress(1,0);
1664 // The next set of s-digits
1665 mergeSDigitsManager = (AliTRDdigitsManager *)
1666 fSDigitsManagerList->After(mergeSDigitsManager);
1674 //_____________________________________________________________________________
1675 Bool_t AliTRDdigitizer::SDigits2Digits()
1678 // Merges the input s-digits and converts them to normal digits
1681 if (!MergeSDigits()) {
1685 return ConvertSDigits();
1689 //_____________________________________________________________________________
1690 Bool_t AliTRDdigitizer::WriteDigits() const
1693 // Writes out the TRD-digits and the dictionaries
1697 fRunLoader->CdGAFile();
1699 // Store the digits and the dictionary in the tree
1700 return fDigitsManager->WriteDigits();
1704 //_____________________________________________________________________________
1705 void AliTRDdigitizer::InitOutput(Int_t iEvent)
1708 // Initializes the output branches
1714 AliError("Run Loader is NULL");
1718 AliLoader *loader = fRunLoader->GetLoader("TRDLoader");
1720 AliError("Can not get TRD loader from Run Loader");
1727 // If we produce SDigits
1728 tree = loader->TreeS();
1730 loader->MakeTree("S");
1731 tree = loader->TreeS();
1735 // If we produce Digits
1736 tree = loader->TreeD();
1738 loader->MakeTree("D");
1739 tree = loader->TreeD();
1743 fDigitsManager->SetEvent(iEvent);
1744 fDigitsManager->MakeBranch(tree);
1748 //_____________________________________________________________________________
1749 Double_t AliTRDdigitizer::TimeStruct(Float_t vdrift, Double_t dist, Double_t z)
1752 // Applies the time structure of the drift cells (by C.Lippmann).
1753 // The drift time of electrons to the anode wires depends on the
1754 // distance to the wire (z) and on the position in the drift region.
1757 // dist = radial distance from (cathode) pad plane [cm]
1758 // z = distance from anode wire (parallel to cathode planes) [cm]
1761 // tdrift = the drift time of an electron at the given position
1763 // We interpolate between the drift time values at the two drift
1764 // velocities fVDlo and fVDhi, being smaller and larger than
1765 // fDriftVelocity. We use the two stored drift time maps fTimeStruct1
1766 // and fTimeStruct2, calculated for the two mentioned drift velocities.
1769 SampleTimeStruct(vdrift);
1772 Int_t r1 = (Int_t)(10 * dist);
1774 if (r1 > 37) r1 = 37;
1777 if (r2 > 37) r2 = 37;
1778 const Int_t kz1 = ((Int_t)(100 * z / 2.5));
1779 const Int_t kz2 = kz1 + 1;
1785 AliWarning(Form("Indices out of range: dist=%.2f, z=%.2f, r1=%d, kz1=%d"
1789 const Float_t ky111 = fTimeStruct1[r1+38*kz1];
1790 const Float_t ky221 = ((r2 <= 37) && (kz2 <= 10))
1791 ? fTimeStruct1[r2+38*kz2]
1792 : fTimeStruct1[37+38*10];
1793 const Float_t ky121 = (kz2 <= 10)
1794 ? fTimeStruct1[r1+38*kz2]
1795 : fTimeStruct1[r1+38*10];
1796 const Float_t ky211 = (r2 <= 37)
1797 ? fTimeStruct1[r2+38*kz1]
1798 : fTimeStruct1[37+38*kz1];
1800 // 2D Interpolation, lower drift time map
1801 const Float_t ky11 = (ky211-ky111)*10*dist + ky111 - (ky211-ky111)*r1;
1802 const Float_t ky21 = (ky221-ky121)*10*dist + ky121 - (ky221-ky121)*r1;
1804 const Float_t ky112 = fTimeStruct2[r1+38*kz1];
1805 const Float_t ky222 = ((r2 <= 37) && (kz2 <= 10))
1806 ? fTimeStruct2[r2+38*kz2]
1807 : fTimeStruct2[37+38*10];
1808 const Float_t ky122 = (kz2 <= 10)
1809 ? fTimeStruct2[r1+38*kz2]
1810 : fTimeStruct2[r1+38*10];
1811 const Float_t ky212 = (r2 <= 37)
1812 ? fTimeStruct2[r2+38*kz1]
1813 : fTimeStruct2[37+38*kz1];
1815 // 2D Interpolation, larger drift time map
1816 const Float_t ky12 = (ky212-ky112)*10*dist + ky112 - (ky212-ky112)*r1;
1817 const Float_t ky22 = (ky222-ky122)*10*dist + ky122 - (ky222-ky122)*r1;
1819 // Dist now is the drift distance to the anode wires (negative if electrons are
1820 // between anode wire plane and cathode pad plane)
1821 dist -= AliTRDgeometry::AmThick() / 2.0;
1823 // Get the drift times for the drift velocities fVDlo and fVDhi
1824 const Float_t ktdrift1 = ((TMath::Abs(dist) > 0.005) || (z > 0.005))
1825 ? (ky21 - ky11) * 100 * z / 2.5 + ky11 - (ky21 - ky11) * kz1
1827 const Float_t ktdrift2 = ((TMath::Abs(dist) > 0.005) || (z > 0.005))
1828 ? (ky22 - ky12) * 100 * z / 2.5 + ky12 - (ky22 - ky12) * kz1
1831 // 1D Interpolation between the values at fVDlo and fVDhi
1832 Float_t a = (ktdrift2 - ktdrift1)
1834 Float_t b = ktdrift2 - a * fVDhi;
1836 return a * vdrift + b;
1840 //_____________________________________________________________________________
1841 void AliTRDdigitizer::SampleTimeStruct(Float_t vdrift)
1844 // Samples the timing structure of a drift cell
1845 // Drift Time data calculated with Garfield (by C.Lippmann)
1849 if (vdrift == fTimeLastVdrift) {
1852 fTimeLastVdrift = vdrift;
1854 // Drift time maps are saved for some drift velocity values (in drift region):
1865 if (vdrift < fVDsmp[0]) {
1866 AliWarning(Form("Drift Velocity too small (%.3f<%.3f)",vdrift,fVDsmp[0]));
1869 else if (vdrift > fVDsmp[7]) {
1870 AliWarning(Form("Drift Velocity too large (%.3f>%.3f)",vdrift,fVDsmp[6]));
1874 const Int_t ktimebin = 38;
1875 const Int_t kZbin = 11;
1877 // Garfield simulation at UD = -1500V; vd = 1.032cm/microsec, <driftfield> = 525V/cm
1878 Float_t time1500[ktimebin][kZbin] =
1879 {{0.09170, 0.09205, 0.09306, 0.09475, 0.09716, 0.10035,
1880 0.10445, 0.10993, 0.11838, 0.13986, 0.37858},
1881 {0.06588, 0.06626, 0.06739, 0.06926, 0.07186, 0.07524,
1882 0.07951, 0.08515, 0.09381, 0.11601, 0.35673},
1883 {0.03946, 0.04003, 0.04171, 0.04435, 0.04780, 0.05193,
1884 0.05680, 0.06306, 0.07290, 0.09873, 0.34748},
1885 {0.01151, 0.01283, 0.01718, 0.02282, 0.02880, 0.03479,
1886 0.04098, 0.04910, 0.06413, 0.10567, 0.36897},
1887 {0.01116, 0.01290, 0.01721, 0.02299, 0.02863, 0.03447,
1888 0.04074, 0.04984, 0.06839, 0.11625, 0.37277},
1889 {0.03919, 0.03974, 0.04131, 0.04380, 0.04703, 0.05102,
1890 0.05602, 0.06309, 0.07651, 0.10938, 0.36838},
1891 {0.06493, 0.06560, 0.06640, 0.06802, 0.07051, 0.07392,
1892 0.07853, 0.08510, 0.09690, 0.12621, 0.38058},
1893 {0.09174, 0.09186, 0.09225, 0.09303, 0.09477, 0.00000,
1894 0.11205, 0.11952, 0.13461, 0.16984, 0.43017},
1895 {0.14356, 0.14494, 0.14959, 0.16002, 0.18328, 0.27981,
1896 0.22785, 0.21240, 0.21948, 0.25965, 0.52392},
1897 {0.23120, 0.23366, 0.24046, 0.25422, 0.28071, 0.36914,
1898 0.32999, 0.31208, 0.31772, 0.35804, 0.62249},
1899 {0.32686, 0.32916, 0.33646, 0.35053, 0.37710, 0.46292,
1900 0.42773, 0.40948, 0.41497, 0.45527, 0.71955},
1901 {0.42353, 0.42583, 0.43317, 0.44727, 0.47380, 0.55884,
1902 0.52479, 0.50650, 0.51194, 0.55225, 0.81658},
1903 {0.52038, 0.52271, 0.53000, 0.54415, 0.57064, 0.65545,
1904 0.62172, 0.60341, 0.60885, 0.64915, 0.91339},
1905 {0.61724, 0.61953, 0.62694, 0.64098, 0.66756, 0.75226,
1906 0.71862, 0.70030, 0.70575, 0.74604, 1.01035},
1907 {0.71460, 0.71678, 0.72376, 0.73786, 0.76447, 0.84913,
1908 0.81551, 0.79720, 0.80264, 0.84292, 1.10723},
1909 {0.81101, 0.81334, 0.82066, 0.83475, 0.86127, 0.94599,
1910 0.91240, 0.89408, 0.89952, 0.93981, 1.20409},
1911 {0.90788, 0.91023, 0.91752, 0.93163, 0.95815, 1.04293,
1912 1.00929, 0.99096, 0.99640, 1.03669, 1.30106},
1913 {1.00477, 1.00707, 1.01449, 1.02852, 1.05504, 1.13976,
1914 1.10617, 1.08784, 1.09329, 1.13358, 1.39796},
1915 {1.10166, 1.10397, 1.11130, 1.12541, 1.15257, 1.23672,
1916 1.20307, 1.18472, 1.19018, 1.23046, 1.49486},
1917 {1.19854, 1.20084, 1.20818, 1.22235, 1.24885, 1.33355,
1918 1.29992, 1.28156, 1.28707, 1.32735, 1.59177},
1919 {1.29544, 1.29780, 1.30507, 1.31917, 1.34575, 1.43073,
1920 1.39681, 1.37851, 1.38396, 1.42377, 1.68854},
1921 {1.39236, 1.39462, 1.40205, 1.41607, 1.44259, 1.52745,
1922 1.49368, 1.47541, 1.48083, 1.52112, 1.78546},
1923 {1.49314, 1.49149, 1.49885, 1.51297, 1.53949, 1.62420,
1924 1.59016, 1.57231, 1.57772, 1.61800, 1.88048},
1925 {1.58610, 1.58839, 1.59572, 1.60983, 1.63635, 1.72109,
1926 1.68651, 1.66921, 1.67463, 1.71489, 1.97918},
1927 {1.68400, 1.68529, 1.69261, 1.70671, 1.73331, 1.81830,
1928 1.78341, 1.76605, 1.77150, 1.81179, 2.07608},
1929 {1.77991, 1.78215, 1.78952, 1.80385, 1.83014, 1.91486,
1930 1.88128, 1.86215, 1.86837, 1.90865, 2.17304},
1931 {1.87674, 1.87904, 1.88647, 1.90052, 1.92712, 2.01173,
1932 1.97812, 1.95905, 1.96527, 2.00710, 2.26979},
1933 {1.97369, 1.97594, 1.98326, 1.99869, 2.02442, 2.10865,
1934 2.07501, 2.05666, 2.06214, 2.10243, 2.36669},
1935 {2.07052, 2.07281, 2.08016, 2.09425, 2.12132, 2.20555,
1936 2.17182, 2.15341, 2.15904, 2.19933, 2.46363},
1937 {2.16742, 2.16971, 2.17707, 2.19114, 2.21766, 2.30240,
1938 2.26877, 2.25015, 2.25573, 2.29586, 2.56060},
1939 {2.26423, 2.26659, 2.27396, 2.28803, 2.31456, 2.40828,
1940 2.36567, 2.34705, 2.35282, 2.39765, 2.65744},
1941 {2.36153, 2.36349, 2.37330, 2.38501, 2.41159, 2.49940,
1942 2.46257, 2.44420, 2.44843, 2.48987, 2.75431},
1943 {2.46558, 2.46035, 2.46822, 2.48181, 2.50849, 2.59630,
1944 2.55947, 2.54112, 2.54513, 2.58677, 2.85094},
1945 {2.56248, 2.55723, 2.56486, 2.57871, 2.60520, 2.68998,
1946 2.65626, 2.63790, 2.64316, 2.68360, 2.94813},
1947 {2.65178, 2.65441, 2.66153, 2.67556, 2.70210, 2.78687,
1948 2.75319, 2.73463, 2.74032, 2.78060, 3.04503},
1949 {2.74868, 2.75131, 2.75870, 2.77245, 2.79385, 2.88700,
1950 2.85009, 2.83177, 2.83723, 2.87750, 3.14193},
1951 {2.84574, 2.84789, 2.85560, 2.86935, 2.89075, 2.98060,
1952 2.94576, 2.92868, 2.93356, 2.97436, 3.23868},
1953 {2.94239, 2.94469, 2.95221, 2.96625, 2.99345, 3.07747,
1954 3.04266, 3.02545, 3.03051, 3.07118, 3.33555}};
1956 // Garfield simulation at UD = -1600V; vd = 1.158cm/microsec, <driftfield> = 558V/cm
1957 Float_t time1600[ktimebin][kZbin] =
1958 {{0.09169, 0.09203, 0.09305, 0.09473, 0.09714, 0.10032,
1959 0.10441, 0.10990, 0.11835, 0.13986, 0.37845},
1960 {0.06589, 0.06626, 0.06738, 0.06924, 0.07184, 0.07521,
1961 0.07947, 0.08512, 0.09379, 0.11603, 0.35648},
1962 {0.03947, 0.04003, 0.04171, 0.04434, 0.04778, 0.05190,
1963 0.05678, 0.06304, 0.07292, 0.09876, 0.34759},
1964 {0.01111, 0.01281, 0.01718, 0.02281, 0.02879, 0.03477,
1965 0.04097, 0.04910, 0.06415, 0.10573, 0.36896},
1966 {0.01120, 0.01311, 0.01721, 0.02279, 0.02862, 0.03446,
1967 0.04074, 0.04981, 0.06825, 0.11595, 0.37255},
1968 {0.03919, 0.03980, 0.04132, 0.04380, 0.04704, 0.05102,
1969 0.05602, 0.06302, 0.07633, 0.10896, 0.36743},
1970 {0.06531, 0.06528, 0.06631, 0.06805, 0.07053, 0.07392,
1971 0.07853, 0.08505, 0.09669, 0.12578, 0.37967},
1972 {0.09157, 0.09171, 0.09216, 0.09301, 0.09475, 0.00000,
1973 0.11152, 0.11879, 0.13352, 0.16802, 0.42750},
1974 {0.13977, 0.14095, 0.14509, 0.15433, 0.17534, 0.26406,
1975 0.21660, 0.20345, 0.21113, 0.25067, 0.51434},
1976 {0.21816, 0.22041, 0.22631, 0.23850, 0.26208, 0.34340,
1977 0.30755, 0.29237, 0.29878, 0.33863, 0.60258},
1978 {0.30344, 0.30547, 0.31241, 0.32444, 0.34809, 0.42696,
1979 0.39464, 0.37919, 0.38546, 0.42530, 0.68926},
1980 {0.38969, 0.39164, 0.39810, 0.41059, 0.43441, 0.51246,
1981 0.48112, 0.46562, 0.47191, 0.51172, 0.77558},
1982 {0.47592, 0.47799, 0.48442, 0.49689, 0.52061, 0.59855,
1983 0.56752, 0.55201, 0.55826, 0.59808, 0.86202},
1984 {0.56226, 0.56428, 0.57074, 0.58324, 0.60696, 0.68483,
1985 0.65388, 0.63837, 0.64461, 0.68445, 0.94830},
1986 {0.64881, 0.65063, 0.65709, 0.66958, 0.69331, 0.77117,
1987 0.74023, 0.72472, 0.73098, 0.77079, 1.03486},
1988 {0.73506, 0.73698, 0.74344, 0.75596, 0.77964, 0.85751,
1989 0.82658, 0.81107, 0.81731, 0.85712, 1.12106},
1990 {0.82132, 0.82333, 0.82979, 0.84228, 0.86608, 0.94386,
1991 0.91293, 0.89742, 0.90367, 0.94335, 1.20737},
1992 {0.90767, 0.90968, 0.91614, 0.92863, 0.95236, 1.03021,
1993 0.99928, 0.98377, 0.99001, 1.02984, 1.29371},
1994 {0.99410, 0.99602, 1.00257, 1.01498, 1.03869, 1.11720,
1995 1.08563, 1.07011, 1.07637, 1.11621, 1.37873},
1996 {1.08036, 1.08240, 1.08884, 1.10138, 1.12504, 1.20301,
1997 1.17198, 1.15647, 1.16272, 1.20255, 1.46651},
1998 {1.16670, 1.16872, 1.17525, 1.18783, 1.21139, 1.28934,
1999 1.25833, 1.24281, 1.24909, 1.28889, 1.55275},
2000 {1.25307, 1.25510, 1.26153, 1.27404, 1.29773, 1.37584,
2001 1.34469, 1.32916, 1.33536, 1.37524, 1.63915},
2002 {1.33942, 1.34146, 1.34788, 1.36040, 1.38410, 1.46438,
2003 1.43105, 1.41537, 1.42176, 1.46158, 1.72538},
2004 {1.42579, 1.42782, 1.43458, 1.44674, 1.47043, 1.55085,
2005 1.51675, 1.50168, 1.50810, 1.54793, 1.81174},
2006 {1.51207, 1.51454, 1.52060, 1.53307, 1.55684, 1.63478,
2007 1.60336, 1.58820, 1.59446, 1.63414, 1.89814},
2008 {1.59856, 1.60047, 1.60693, 1.61942, 1.64317, 1.72257,
2009 1.69008, 1.67454, 1.68080, 1.72063, 1.98433},
2010 {1.68481, 1.68682, 1.69330, 1.70584, 1.72949, 1.80752,
2011 1.77643, 1.76089, 1.76716, 1.80692, 2.07069},
2012 {1.77117, 1.77319, 1.77969, 1.79260, 1.81583, 1.89376,
2013 1.86226, 1.84720, 1.85355, 1.89256, 2.15343},
2014 {1.85748, 1.85967, 1.86605, 1.87848, 1.90222, 1.98010,
2015 1.94913, 1.93271, 1.93981, 1.97968, 2.24355},
2016 {1.94386, 1.94587, 1.95233, 1.96484, 1.98854, 2.06646,
2017 2.03542, 2.01755, 2.02617, 2.06604, 2.32993},
2018 {2.03022, 2.03230, 2.03868, 2.05134, 2.07488, 2.15367,
2019 2.12178, 2.10391, 2.11252, 2.15432, 2.41623},
2020 {2.11656, 2.11857, 2.12505, 2.13772, 2.16147, 2.23919,
2021 2.20817, 2.19265, 2.20744, 2.23872, 2.49996},
2022 {2.20291, 2.20611, 2.21137, 2.22387, 2.24758, 2.32563,
2023 2.29450, 2.27901, 2.28525, 2.32507, 2.58897},
2024 {2.28922, 2.29172, 2.29774, 2.31345, 2.33400, 2.41287,
2025 2.38086, 2.36535, 2.37160, 2.40869, 2.67113},
2026 {2.37572, 2.37764, 2.38410, 2.39803, 2.42046, 2.49817,
2027 2.46721, 2.45171, 2.45794, 2.49505, 2.76061},
2028 {2.46190, 2.46396, 2.47043, 2.48340, 2.50665, 2.58453,
2029 2.55357, 2.53728, 2.54430, 2.58407, 2.84816},
2030 {2.54833, 2.55032, 2.55679, 2.56976, 2.59312, 2.67103,
2031 2.63993, 2.62364, 2.63062, 2.67040, 2.93444},
2032 {2.63456, 2.63660, 2.64304, 2.65555, 2.67938, 2.75739,
2033 2.72629, 2.71064, 2.71688, 2.75671, 3.01886}};
2035 // Garfield simulation at UD = -1700V; vd = 1.299cm/microsec, <driftfield> = 590V/cm
2036 Float_t time1700[ktimebin][kZbin] =
2037 {{0.09167, 0.09201, 0.09302, 0.09471, 0.09712, 0.10029,
2038 0.10438, 0.10986, 0.11832, 0.13986, 0.37824},
2039 {0.06591, 0.06626, 0.06736, 0.06923, 0.07183, 0.07519,
2040 0.07944, 0.08511, 0.09378, 0.11603, 0.35625},
2041 {0.03946, 0.04003, 0.04170, 0.04433, 0.04777, 0.05189,
2042 0.05676, 0.06301, 0.07291, 0.09880, 0.34724},
2043 {0.01110, 0.01281, 0.01718, 0.02280, 0.02879, 0.03476,
2044 0.04096, 0.04910, 0.06417, 0.10582, 0.36861},
2045 {0.01115, 0.01294, 0.01721, 0.02276, 0.02862, 0.03447,
2046 0.04074, 0.04980, 0.06812, 0.11565, 0.37231},
2047 {0.03920, 0.03974, 0.04133, 0.04381, 0.04706, 0.05105,
2048 0.05603, 0.06299, 0.07618, 0.10860, 0.36646},
2049 {0.06498, 0.06529, 0.06634, 0.06808, 0.07055, 0.07395,
2050 0.07852, 0.08500, 0.09650, 0.12532, 0.37850},
2051 {0.09143, 0.09159, 0.09207, 0.09297, 0.09473, 0.00000,
2052 0.11102, 0.11809, 0.13245, 0.16627, 0.42496},
2053 {0.13646, 0.13750, 0.14112, 0.14926, 0.16806, 0.24960,
2054 0.20627, 0.19536, 0.20366, 0.24256, 0.50557},
2055 {0.20678, 0.20848, 0.21384, 0.22450, 0.24552, 0.32018,
2056 0.28740, 0.27477, 0.28196, 0.32128, 0.58475},
2057 {0.28287, 0.28461, 0.29020, 0.30108, 0.32224, 0.39467,
2058 0.36500, 0.35217, 0.35926, 0.39860, 0.66194},
2059 {0.35972, 0.36145, 0.36713, 0.37797, 0.39912, 0.47091,
2060 0.44212, 0.42925, 0.43632, 0.47563, 0.73892},
2061 {0.43667, 0.43841, 0.44413, 0.45494, 0.47607, 0.54780,
2062 0.51912, 0.50627, 0.51334, 0.55254, 0.81595},
2063 {0.51365, 0.51540, 0.52101, 0.53193, 0.55305, 0.62463,
2064 0.59617, 0.58328, 0.59035, 0.62965, 0.89303},
2065 {0.59064, 0.59240, 0.59801, 0.60893, 0.63009, 0.70169,
2066 0.67317, 0.66028, 0.66735, 0.70666, 0.96995},
2067 {0.66765, 0.66939, 0.67501, 0.68592, 0.70724, 0.77863,
2068 0.75016, 0.73728, 0.74435, 0.78366, 1.04696},
2069 {0.74464, 0.74636, 0.75200, 0.76293, 0.78405, 0.85561,
2070 0.82716, 0.81427, 0.82133, 0.86064, 1.12396},
2071 {0.82165, 0.82340, 0.82902, 0.83991, 0.86104, 0.93266,
2072 0.90414, 0.89128, 0.89834, 0.93763, 1.20100},
2073 {0.89863, 0.90042, 0.90659, 0.91705, 0.93805, 1.00960,
2074 0.98115, 0.96825, 0.97533, 1.01462, 1.27801},
2075 {0.97563, 0.97740, 0.98310, 0.99391, 1.01504, 1.08659,
2076 1.05814, 1.04526, 1.05233, 1.09163, 1.35503},
2077 {1.05276, 1.05451, 1.06002, 1.07090, 1.09099, 1.16357,
2078 1.13516, 1.12225, 1.12933, 1.16863, 1.43195},
2079 {1.12977, 1.13138, 1.13700, 1.14792, 1.16797, 1.24061,
2080 1.21212, 1.19926, 1.20626, 1.24554, 1.50900},
2081 {1.20664, 1.20839, 1.21400, 1.22490, 1.24606, 1.31772,
2082 1.28914, 1.27382, 1.28329, 1.32262, 1.58550},
2083 {1.28367, 1.28541, 1.29099, 1.30189, 1.32312, 1.39460,
2084 1.36612, 1.34924, 1.36030, 1.39961, 1.66310},
2085 {1.36064, 1.36249, 1.36799, 1.37896, 1.40004, 1.48030,
2086 1.44314, 1.43032, 1.43731, 1.47659, 1.73442},
2087 {1.43762, 1.43937, 1.44497, 1.45618, 1.47704, 1.54932,
2088 1.52012, 1.50725, 1.51430, 1.55357, 1.81708},
2089 {1.51462, 1.51937, 1.52203, 1.53316, 1.55403, 1.62572,
2090 1.59713, 1.58424, 1.59128, 1.63061, 1.89406},
2091 {1.59162, 1.59338, 1.59947, 1.60989, 1.63103, 1.70270,
2092 1.67411, 1.66124, 1.66799, 1.70759, 1.97103},
2093 {1.66874, 1.67037, 1.67597, 1.68687, 1.70814, 1.77969,
2094 1.75112, 1.73806, 1.74530, 1.78457, 2.04794},
2095 {1.74693, 1.74749, 1.75297, 1.76476, 1.78500, 1.85667,
2096 1.82811, 1.81504, 1.82101, 1.86161, 2.12492},
2097 {1.82260, 1.82437, 1.82995, 1.84174, 1.86202, 1.93372,
2098 1.90509, 1.89202, 1.89930, 1.93859, 2.20189},
2099 {1.89964, 1.90135, 1.90693, 1.91789, 1.93952, 2.01080,
2100 1.98207, 1.96921, 1.97628, 2.01384, 2.27887},
2101 {1.97662, 1.97917, 1.98611, 1.99487, 2.01601, 2.08778,
2102 2.05846, 2.04623, 2.05330, 2.09244, 2.35585},
2103 {2.05359, 2.05615, 2.06309, 2.07187, 2.09867, 2.16459,
2104 2.13610, 2.12322, 2.13029, 2.16942, 2.43199},
2105 {2.13063, 2.13233, 2.13795, 2.14886, 2.17008, 2.24199,
2106 2.21310, 2.20020, 2.20727, 2.24659, 2.50983},
2107 {2.20761, 2.20931, 2.21955, 2.22624, 2.24708, 2.32147,
2108 2.29009, 2.27725, 2.28276, 2.32359, 2.58680},
2109 {2.28459, 2.29108, 2.29202, 2.30286, 2.32007, 2.39559,
2110 2.36683, 2.35422, 2.36119, 2.40058, 2.66081},
2111 {2.36153, 2.36806, 2.36889, 2.37985, 2.40092, 2.47828,
2112 2.44381, 2.43099, 2.43819, 2.47750, 2.73779}};
2114 // Garfield simulation at UD = -1800V; vd = 1.450cm/microsec, <driftfield> = 623V/cm
2115 Float_t time1800[ktimebin][kZbin] =
2116 {{0.09166, 0.09199, 0.09300, 0.09470, 0.09709, 0.10026,
2117 0.10434, 0.10983, 0.11831, 0.13987, 0.37802},
2118 {0.06585, 0.06623, 0.06735, 0.06921, 0.07180, 0.07520,
2119 0.07941, 0.08507, 0.09376, 0.11604, 0.35624},
2120 {0.03945, 0.04004, 0.04169, 0.04432, 0.04776, 0.05187,
2121 0.05674, 0.06300, 0.07290, 0.09884, 0.34704},
2122 {0.01108, 0.01287, 0.01717, 0.02280, 0.02880, 0.03476,
2123 0.04095, 0.04909, 0.06419, 0.10589, 0.36843},
2124 {0.01115, 0.01287, 0.01720, 0.02276, 0.02862, 0.03448,
2125 0.04073, 0.04973, 0.06799, 0.11535, 0.37224},
2126 {0.03918, 0.03975, 0.04134, 0.04382, 0.04707, 0.05105,
2127 0.05603, 0.06296, 0.07605, 0.10822, 0.36560},
2128 {0.06498, 0.06532, 0.06635, 0.06809, 0.07058, 0.07395,
2129 0.07855, 0.08495, 0.09632, 0.12488, 0.37730},
2130 {0.09130, 0.09160, 0.09199, 0.09300, 0.09472, 0.00000,
2131 0.11059, 0.11747, 0.13146, 0.16462, 0.42233},
2132 {0.13364, 0.13449, 0.13767, 0.14481, 0.16147, 0.23635,
2133 0.19706, 0.18812, 0.19704, 0.23520, 0.49749},
2134 {0.19698, 0.19844, 0.20311, 0.21236, 0.23082, 0.29920,
2135 0.26936, 0.25927, 0.26732, 0.30601, 0.56871},
2136 {0.26518, 0.26670, 0.27160, 0.28099, 0.29955, 0.36597,
2137 0.33885, 0.32858, 0.33653, 0.37524, 0.63801},
2138 {0.33441, 0.33553, 0.34040, 0.34987, 0.36841, 0.43428,
2139 0.40797, 0.39763, 0.40556, 0.44425, 0.70698},
2140 {0.40296, 0.40447, 0.40934, 0.41881, 0.43737, 0.50306,
2141 0.47695, 0.46662, 0.47455, 0.51329, 0.77600},
2142 {0.47296, 0.47344, 0.47830, 0.48779, 0.50632, 0.57200,
2143 0.54593, 0.53559, 0.54351, 0.58222, 0.84489},
2144 {0.54089, 0.54264, 0.54727, 0.55673, 0.57529, 0.64094,
2145 0.61490, 0.60457, 0.61249, 0.65118, 0.91394},
2146 {0.60987, 0.61138, 0.61624, 0.62573, 0.64428, 0.70989,
2147 0.68397, 0.67354, 0.68147, 0.72015, 0.98291},
2148 {0.67883, 0.68035, 0.68521, 0.69469, 0.71324, 0.77896,
2149 0.75287, 0.74251, 0.75043, 0.78912, 1.04458},
2150 {0.74780, 0.74932, 0.75421, 0.76367, 0.78221, 0.84785,
2151 0.82185, 0.81148, 0.81941, 0.85811, 1.12085},
2152 {0.81690, 0.81830, 0.82316, 0.83263, 0.85120, 0.91683,
2153 0.89077, 0.88045, 0.88837, 0.92707, 1.18976},
2154 {0.88574, 0.88726, 0.89228, 0.90198, 0.92017, 0.98578,
2155 0.95974, 0.94947, 0.95734, 0.99604, 1.25873},
2156 {0.95493, 0.95624, 0.96110, 0.97058, 0.98913, 1.05481,
2157 1.02873, 1.01839, 1.02631, 1.06503, 1.32772},
2158 {1.02392, 1.02524, 1.03008, 1.03955, 1.05810, 1.12378,
2159 1.09757, 1.08605, 1.09530, 1.13399, 1.39669},
2160 {1.09270, 1.09418, 1.09911, 1.10854, 1.12714, 1.19281,
2161 1.16502, 1.15633, 1.16427, 1.20271, 1.46574},
2162 {1.16168, 1.16323, 1.16801, 1.17772, 1.19604, 1.26190,
2163 1.23399, 1.22531, 1.23323, 1.27194, 1.53475},
2164 {1.23061, 1.23214, 1.23698, 1.24669, 1.26503, 1.33073,
2165 1.30461, 1.29428, 1.30220, 1.34091, 1.60372},
2166 {1.29960, 1.30110, 1.30596, 1.31544, 1.33398, 1.39962,
2167 1.37228, 1.36323, 1.37121, 1.40988, 1.67273},
2168 {1.36851, 1.37007, 1.37512, 1.38441, 1.40297, 1.46865,
2169 1.44256, 1.43222, 1.44017, 1.47878, 1.74155},
2170 {1.43752, 1.43904, 1.44773, 1.45338, 1.47220, 1.53759,
2171 1.51136, 1.50119, 1.50914, 1.54775, 1.81050},
2172 {1.50646, 1.50802, 1.51288, 1.52237, 1.54097, 1.60697,
2173 1.58049, 1.57018, 1.57811, 1.61678, 1.87947},
2174 {1.57545, 1.57720, 1.58185, 1.59134, 1.60996, 1.67787,
2175 1.64929, 1.63914, 1.64707, 1.68570, 1.94851},
2176 {1.64442, 1.64617, 1.65081, 1.66035, 1.67893, 1.74684,
2177 1.71826, 1.70745, 1.71604, 1.75310, 2.01748},
2178 {1.71337, 1.71513, 1.71978, 1.72932, 1.74645, 1.81346,
2179 1.78739, 1.77642, 1.78501, 1.82151, 2.08644},
2180 {1.78238, 1.78410, 1.78876, 1.79824, 1.81678, 1.88332,
2181 1.85639, 1.84262, 1.85397, 1.89270, 2.15533},
2182 {1.85135, 1.85306, 1.85778, 1.86728, 1.88580, 1.95615,
2183 1.92536, 1.91171, 1.92283, 1.96165, 2.22428},
2184 {1.92774, 1.92184, 1.92672, 1.93618, 1.95477, 2.02048,
2185 1.99427, 1.98068, 1.99192, 2.03062, 2.29338},
2186 {1.98929, 1.99081, 1.99567, 2.00515, 2.02373, 2.08987,
2187 2.06332, 2.05249, 2.05939, 2.09928, 2.36227},
2188 {2.05829, 2.05978, 2.06464, 2.07414, 2.09272, 2.15850,
2189 2.12928, 2.12194, 2.12987, 2.16825, 2.43083},
2190 {2.12726, 2.12869, 2.13360, 2.14425, 2.16160, 2.22872,
2191 2.20118, 2.19078, 2.19876, 2.23416, 2.50007}};
2193 // Garfield simulation at UD = -1900V; vd = 1.610cm/microsec, <driftfield> = 655V/cm
2194 Float_t time1900[ktimebin][kZbin] =
2195 {{0.09166, 0.09198, 0.09298, 0.09467, 0.09707, 0.10023,
2196 0.10431, 0.10980, 0.11828, 0.13988, 0.37789},
2197 {0.06584, 0.06622, 0.06735, 0.06920, 0.07179, 0.07514,
2198 0.07938, 0.08505, 0.09374, 0.11606, 0.35599},
2199 {0.03945, 0.04002, 0.04169, 0.04432, 0.04775, 0.05185,
2200 0.05672, 0.06298, 0.07290, 0.09888, 0.34695},
2201 {0.01109, 0.01281, 0.01717, 0.02279, 0.02878, 0.03476,
2202 0.04094, 0.04909, 0.06421, 0.10597, 0.36823},
2203 {0.01115, 0.01287, 0.01720, 0.02294, 0.02862, 0.03448,
2204 0.04074, 0.04973, 0.06783, 0.11506, 0.37206},
2205 {0.03940, 0.03975, 0.04135, 0.04386, 0.04708, 0.05106,
2206 0.05604, 0.06293, 0.07592, 0.10787, 0.36484},
2207 {0.06500, 0.06534, 0.06638, 0.06811, 0.07060, 0.07413,
2208 0.07852, 0.08491, 0.09614, 0.12446, 0.37626},
2209 {0.09119, 0.09140, 0.09194, 0.09293, 0.09471, 0.00000,
2210 0.11013, 0.11685, 0.13050, 0.16302, 0.41991},
2211 {0.13111, 0.13190, 0.13466, 0.14091, 0.15554, 0.22409,
2212 0.18846, 0.18167, 0.19113, 0.22854, 0.48995},
2213 {0.18849, 0.18975, 0.19380, 0.20185, 0.21797, 0.28050,
2214 0.25368, 0.24575, 0.25446, 0.29249, 0.55442},
2215 {0.24995, 0.25125, 0.25563, 0.26366, 0.27986, 0.34065,
2216 0.31605, 0.30815, 0.31680, 0.35482, 0.61697},
2217 {0.31187, 0.31324, 0.31745, 0.32580, 0.34205, 0.40217,
2218 0.37825, 0.37031, 0.37897, 0.41696, 0.67890},
2219 {0.37401, 0.37531, 0.37955, 0.38777, 0.40395, 0.46408,
2220 0.44037, 0.43242, 0.44108, 0.47906, 0.74122},
2221 {0.43610, 0.43741, 0.44161, 0.44986, 0.46604, 0.52614,
2222 0.50248, 0.49452, 0.50316, 0.54116, 0.80326},
2223 {0.49820, 0.49988, 0.50372, 0.51196, 0.52814, 0.58822,
2224 0.56459, 0.55661, 0.56527, 0.60326, 0.86526},
2225 {0.56032, 0.56161, 0.56582, 0.57408, 0.59024, 0.65032,
2226 0.62670, 0.61872, 0.62737, 0.66537, 0.92749},
2227 {0.62240, 0.62371, 0.62792, 0.63624, 0.65236, 0.71241,
2228 0.68881, 0.68081, 0.68947, 0.72750, 0.98941},
2229 {0.68449, 0.68581, 0.69002, 0.69828, 0.71444, 0.77452,
2230 0.75089, 0.74295, 0.75157, 0.78957, 1.05157},
2231 {0.74660, 0.74790, 0.75212, 0.76036, 0.77654, 0.83748,
2232 0.81299, 0.80501, 0.81193, 0.85168, 1.11375},
2233 {0.80870, 0.81017, 0.81423, 0.82246, 0.83867, 0.89908,
2234 0.87509, 0.86660, 0.87577, 0.91376, 1.17586},
2235 {0.87080, 0.87233, 0.87632, 0.88458, 0.90074, 0.96083,
2236 0.93718, 0.92922, 0.93787, 0.97588, 1.23794},
2237 {0.93291, 0.93422, 0.93844, 0.94667, 0.96293, 1.02295,
2238 0.99929, 0.99127, 0.99997, 1.03797, 1.29995},
2239 {0.99500, 0.99645, 1.00308, 1.00877, 1.02497, 1.08504,
2240 1.06140, 1.05343, 1.06203, 1.10006, 1.36216},
2241 {1.05712, 1.05926, 1.06262, 1.07092, 1.08706, 1.14754,
2242 1.12350, 1.11550, 1.12417, 1.16218, 1.42427},
2243 {1.11921, 1.12059, 1.12473, 1.13297, 1.14916, 1.21140,
2244 1.18560, 1.17284, 1.18625, 1.22414, 1.48629},
2245 {1.18140, 1.18262, 1.18690, 1.19508, 1.21125, 1.27139,
2246 1.24164, 1.23495, 1.24838, 1.28634, 1.54852},
2247 {1.24340, 1.24473, 1.24901, 1.25732, 1.27336, 1.33358,
2248 1.30793, 1.30179, 1.31047, 1.34848, 1.61066},
2249 {1.30551, 1.30684, 1.31104, 1.32056, 1.33553, 1.39609,
2250 1.37004, 1.36392, 1.37045, 1.41057, 1.67259},
2251 {1.36755, 1.36892, 1.37315, 1.39148, 1.39755, 1.45820,
2252 1.43215, 1.42602, 1.43467, 1.47268, 1.73477},
2253 {1.42966, 1.43101, 1.43549, 1.45359, 1.45976, 1.52031,
2254 1.49601, 1.48811, 1.49677, 1.53477, 1.79691},
2255 {1.49180, 1.49321, 1.49760, 1.51570, 1.52175, 1.58185,
2256 1.55771, 1.55023, 1.55888, 1.59672, 1.85501},
2257 {1.55391, 1.55527, 1.55943, 1.57782, 1.58391, 1.64395,
2258 1.62008, 1.61233, 1.62085, 1.65883, 1.92091},
2259 {1.61599, 1.61732, 1.62154, 1.63993, 1.64612, 1.70608,
2260 1.68237, 1.67108, 1.68301, 1.72110, 1.97931},
2261 {1.67808, 1.67948, 1.68364, 1.70204, 1.70823, 1.76858,
2262 1.74404, 1.73539, 1.74512, 1.78321, 2.04522},
2263 {1.74019, 1.74152, 1.74573, 1.76415, 1.77015, 1.83040,
2264 1.80615, 1.79366, 1.80723, 1.84509, 2.10742},
2265 {1.80235, 1.80362, 1.80783, 1.82626, 1.83227, 1.89246,
2266 1.86795, 1.85405, 1.86938, 1.90720, 2.16953},
2267 {1.86442, 1.86572, 1.86994, 1.88837, 1.89438, 1.95445,
2268 1.93006, 1.92283, 1.93148, 1.96931, 2.23147},
2269 {1.92700, 1.92783, 1.93197, 1.95049, 1.95649, 2.01668,
2270 1.99217, 1.98486, 1.99352, 2.03143, 2.29358}};
2272 // Garfield simulation at UD = -2000V; vd = 1.783cm/microsec, <driftfield> = 688V/cm
2273 Float_t time2000[ktimebin][kZbin] =
2274 {{0.09176, 0.09196, 0.09296, 0.09465, 0.09704, 0.10020,
2275 0.10427, 0.10977, 0.11825, 0.13988, 0.37774},
2276 {0.06583, 0.06620, 0.06735, 0.06918, 0.07177, 0.07513,
2277 0.07936, 0.08503, 0.09372, 0.11606, 0.35586},
2278 {0.03944, 0.04001, 0.04170, 0.04431, 0.04774, 0.05184,
2279 0.05670, 0.06296, 0.07291, 0.09893, 0.34680},
2280 {0.01108, 0.01281, 0.01719, 0.02279, 0.02879, 0.03474,
2281 0.04093, 0.04908, 0.06422, 0.10605, 0.36800},
2282 {0.01114, 0.01287, 0.01720, 0.02276, 0.02863, 0.03449,
2283 0.04073, 0.04970, 0.06774, 0.11478, 0.37179},
2284 {0.03925, 0.03977, 0.04135, 0.04386, 0.04711, 0.05108,
2285 0.05604, 0.06290, 0.07580, 0.10748, 0.36386},
2286 {0.06501, 0.06536, 0.06640, 0.06814, 0.07062, 0.07398,
2287 0.07852, 0.08487, 0.09598, 0.12405, 0.37519},
2288 {0.09109, 0.09127, 0.09188, 0.09292, 0.09472, 0.00000,
2289 0.10964, 0.11630, 0.12960, 0.16150, 0.41765},
2290 {0.12898, 0.12968, 0.13209, 0.13749, 0.15034, 0.21286,
2291 0.18088, 0.17590, 0.18591, 0.22254, 0.48315},
2292 {0.18122, 0.18227, 0.18574, 0.19263, 0.20674, 0.26376,
2293 0.23960, 0.23375, 0.24316, 0.28047, 0.54179},
2294 {0.23674, 0.23784, 0.24142, 0.24847, 0.26264, 0.31810,
2295 0.29602, 0.29008, 0.29944, 0.33675, 0.59795},
2296 {0.29279, 0.29382, 0.29742, 0.30448, 0.31865, 0.37364,
2297 0.35215, 0.34629, 0.35555, 0.39286, 0.65411},
2298 {0.34875, 0.34987, 0.35346, 0.36054, 0.37472, 0.42956,
2299 0.40825, 0.40229, 0.41167, 0.44894, 0.71033},
2300 {0.40484, 0.40594, 0.40954, 0.41660, 0.43077, 0.48560,
2301 0.46433, 0.45840, 0.46772, 0.50500, 0.76632},
2302 {0.46090, 0.46201, 0.46560, 0.47267, 0.48684, 0.54167,
2303 0.52041, 0.51449, 0.52382, 0.56108, 0.82227},
2304 {0.51698, 0.51809, 0.52173, 0.52874, 0.54291, 0.59776,
2305 0.57646, 0.57052, 0.57986, 0.61717, 0.87836},
2306 {0.57306, 0.57418, 0.57782, 0.58513, 0.59899, 0.65380,
2307 0.63255, 0.62661, 0.63594, 0.67325, 0.93460},
2308 {0.62912, 0.63024, 0.63383, 0.64103, 0.65506, 0.70988,
2309 0.68484, 0.68267, 0.69202, 0.72878, 0.99046},
2310 {0.68521, 0.68633, 0.68990, 0.69699, 0.71115, 0.76595,
2311 0.74468, 0.73872, 0.74814, 0.78538, 1.04674},
2312 {0.74127, 0.74239, 0.74605, 0.75303, 0.77022, 0.82204,
2313 0.80078, 0.79484, 0.80416, 0.84147, 1.10261},
2314 {0.79736, 0.79846, 0.80206, 0.80947, 0.82330, 0.87813,
2315 0.85688, 0.85087, 0.86023, 0.89752, 1.15874},
2316 {0.85342, 0.85454, 0.85815, 0.86519, 0.87936, 0.93417,
2317 0.91293, 0.90428, 0.91631, 0.95360, 1.20760},
2318 {0.90949, 0.91061, 0.91423, 0.92128, 0.93544, 0.99026,
2319 0.96807, 0.96305, 0.97239, 1.00967, 1.27078},
2320 {0.96556, 0.96669, 0.97111, 0.97734, 0.99151, 1.04664,
2321 1.02508, 1.01879, 1.02846, 1.06167, 1.32695},
2322 {1.02167, 1.02279, 1.02656, 1.03341, 1.04759, 1.10242,
2323 1.08115, 1.07003, 1.08453, 1.12184, 1.38304},
2324 {1.07776, 1.07883, 1.08242, 1.08950, 1.10384, 1.16422,
2325 1.13725, 1.13133, 1.14061, 1.17793, 1.43910},
2326 {1.13379, 1.13492, 1.13864, 1.14567, 1.15973, 1.21455,
2327 1.19323, 1.18734, 1.19668, 1.23401, 1.49528},
2328 {1.18988, 1.19098, 1.19457, 1.20164, 1.21582, 1.27064,
2329 1.24937, 1.24044, 1.25275, 1.29004, 1.55137},
2330 {1.24592, 1.24706, 1.25087, 1.25773, 1.27188, 1.32670,
2331 1.30544, 1.29953, 1.30883, 1.34613, 1.60743},
2332 {1.30202, 1.30313, 1.30673, 1.31381, 1.32797, 1.38278,
2333 1.36151, 1.35167, 1.36490, 1.40221, 1.66306},
2334 {1.35809, 1.35921, 1.36282, 1.36986, 1.38403, 1.43888,
2335 1.41760, 1.41174, 1.42083, 1.45830, 1.71915},
2336 {1.41419, 1.41528, 1.41890, 1.42595, 1.44011, 1.49496,
2337 1.47368, 1.46769, 1.47706, 1.51436, 1.77523},
2338 {1.47131, 1.47141, 1.47494, 1.48850, 1.49620, 1.55137,
2339 1.52977, 1.51820, 1.53315, 1.57042, 1.83158},
2340 {1.52635, 1.52750, 1.53103, 1.53814, 1.55228, 1.60736,
2341 1.58503, 1.57986, 1.58920, 1.62649, 1.88767},
2342 {1.58418, 1.58355, 1.58711, 1.59526, 1.60833, 1.66316,
2343 1.63345, 1.63261, 1.64556, 1.68204, 1.94359},
2344 {1.64027, 1.63958, 1.64489, 1.65024, 1.66443, 1.71925,
2345 1.69794, 1.69201, 1.70143, 1.73865, 1.99968},
2346 {1.69450, 1.69566, 1.69940, 1.70697, 1.71841, 1.77819,
2347 1.75396, 1.74814, 1.75743, 1.79083, 2.05427},
2348 {1.75054, 1.75221, 1.75527, 1.76306, 1.77662, 1.83428,
2349 1.81006, 1.81173, 1.81345, 1.85076, 2.10289}};
2351 // Garfield simulation at UD = -2100V; vd = 1.959cm/microsec, <driftfield> = 720V/cm
2352 Float_t time2100[ktimebin][kZbin] =
2353 {{0.09160, 0.09194, 0.09294, 0.09462, 0.09701, 0.10017,
2354 0.10424, 0.10974, 0.11823, 0.13988, 0.37762},
2355 {0.06585, 0.06619, 0.06731, 0.06916, 0.07174, 0.07509,
2356 0.07933, 0.08500, 0.09370, 0.11609, 0.35565},
2357 {0.03960, 0.04001, 0.04171, 0.04430, 0.04774, 0.05182,
2358 0.05668, 0.06294, 0.07291, 0.09896, 0.34676},
2359 {0.01109, 0.01280, 0.01716, 0.02279, 0.02876, 0.03474,
2360 0.04096, 0.04908, 0.06424, 0.10612, 0.36790},
2361 {0.01114, 0.01285, 0.01719, 0.02287, 0.02863, 0.03449,
2362 0.04073, 0.04964, 0.06759, 0.11446, 0.37162},
2363 {0.03922, 0.03977, 0.04146, 0.04386, 0.04711, 0.05109,
2364 0.05605, 0.06287, 0.07575, 0.10713, 0.36298},
2365 {0.06504, 0.06538, 0.06641, 0.06818, 0.07064, 0.07426,
2366 0.07852, 0.08483, 0.09581, 0.12363, 0.37424},
2367 {0.09103, 0.09129, 0.09186, 0.09291, 0.09476, 0.00000,
2368 0.10923, 0.11578, 0.12873, 0.16005, 0.41525},
2369 {0.12723, 0.12777, 0.12988, 0.13458, 0.14579, 0.20264,
2370 0.17421, 0.17078, 0.18132, 0.21708, 0.47699},
2371 {0.17508, 0.17601, 0.17897, 0.18487, 0.19698, 0.24881,
2372 0.22737, 0.22337, 0.23348, 0.27000, 0.53032},
2373 {0.22571, 0.22663, 0.22969, 0.23570, 0.24787, 0.29826,
2374 0.27871, 0.27462, 0.28471, 0.32122, 0.58166},
2375 {0.27664, 0.27759, 0.28067, 0.28669, 0.29891, 0.34898,
2376 0.32982, 0.32570, 0.33576, 0.37229, 0.63268},
2377 {0.32766, 0.32862, 0.33170, 0.33778, 0.34988, 0.39973,
2378 0.38088, 0.37675, 0.38680, 0.42333, 0.68159},
2379 {0.37872, 0.37966, 0.38275, 0.38875, 0.40093, 0.45073,
2380 0.43192, 0.42780, 0.43786, 0.47438, 0.73480},
2381 {0.42974, 0.43070, 0.43378, 0.43982, 0.45196, 0.50177,
2382 0.48297, 0.47884, 0.48889, 0.52544, 0.78581},
2383 {0.48081, 0.48175, 0.48482, 0.49084, 0.50302, 0.55290,
2384 0.53398, 0.52988, 0.53994, 0.57647, 0.83687},
2385 {0.53645, 0.53295, 0.53586, 0.54188, 0.55408, 0.60398,
2386 0.58504, 0.58092, 0.59100, 0.62768, 0.88773},
2387 {0.58345, 0.58409, 0.58690, 0.59292, 0.60510, 0.65562,
2388 0.63609, 0.63197, 0.64203, 0.67856, 0.93907},
2389 {0.63397, 0.63490, 0.63795, 0.64403, 0.65613, 0.70612,
2390 0.68714, 0.68301, 0.69294, 0.72955, 0.99000},
2391 {0.68496, 0.68592, 0.68899, 0.69504, 0.70733, 0.75708,
2392 0.73818, 0.73405, 0.74412, 0.78064, 1.04100},
2393 {0.73600, 0.73696, 0.74003, 0.74624, 0.75828, 0.80805,
2394 0.78904, 0.78512, 0.79517, 0.83152, 1.09205},
2395 {0.78709, 0.78801, 0.79108, 0.79709, 0.80931, 0.85906,
2396 0.84027, 0.83614, 0.84621, 0.88269, 1.14058},
2397 {0.83808, 0.83905, 0.84215, 0.84816, 0.86031, 0.91011,
2398 0.89139, 0.88718, 0.89725, 0.93377, 1.19413},
2399 {0.88916, 0.89010, 0.89320, 0.89920, 0.91136, 0.96117,
2400 0.94235, 0.93822, 0.94828, 0.98480, 1.24538},
2401 {0.94036, 0.94113, 0.94422, 0.95023, 0.96241, 1.01220,
2402 0.99310, 0.98927, 0.99933, 1.03585, 1.29629},
2403 {0.99139, 0.99220, 0.99525, 1.00127, 1.01344, 1.06324,
2404 1.04451, 1.04033, 1.04836, 1.08690, 1.34727},
2405 {1.04261, 1.04325, 1.04628, 1.05232, 1.06448, 1.12090,
2406 1.09546, 1.09136, 1.10142, 1.13795, 1.39831},
2407 {1.09331, 1.09429, 1.09742, 1.10336, 1.11557, 1.16547,
2408 1.14658, 1.13642, 1.15247, 1.18898, 1.44936},
2409 {1.14436, 1.14539, 1.14847, 1.15443, 1.16662, 1.21794,
2410 1.19763, 1.19329, 1.20349, 1.23956, 1.50043},
2411 {1.19533, 1.19651, 1.19943, 1.20548, 1.21666, 1.26753,
2412 1.24862, 1.24434, 1.25455, 1.29106, 1.55142},
2413 {1.24638, 1.24756, 1.25046, 1.25648, 1.26764, 1.31858,
2414 1.29967, 1.29538, 1.30499, 1.34211, 1.60250},
2415 {1.29747, 1.29847, 1.30175, 1.30753, 1.31869, 1.36969,
2416 1.35069, 1.34656, 1.35663, 1.39316, 1.64644},
2417 {1.35537, 1.34952, 1.35255, 1.35869, 1.36973, 1.41387,
2418 1.40173, 1.39761, 1.40768, 1.44396, 1.70238},
2419 {1.39956, 1.40056, 1.40380, 1.40961, 1.42178, 1.46492,
2420 1.45278, 1.45423, 1.45872, 1.49522, 1.75557},
2421 {1.45080, 1.45159, 1.45463, 1.46109, 1.47287, 1.52263,
2422 1.50382, 1.50050, 1.50977, 1.54502, 1.80670},
2423 {1.50165, 1.50264, 1.50570, 1.51214, 1.52233, 1.57370,
2424 1.55484, 1.55155, 1.56080, 1.59731, 1.85778},
2425 {1.55269, 1.55364, 1.55675, 1.56274, 1.57491, 1.62598,
2426 1.60590, 1.60259, 1.61185, 1.64836, 1.90883},
2427 {1.60368, 1.60469, 1.60779, 1.61373, 1.62596, 1.67738,
2428 1.65651, 1.65249, 1.66290, 1.69936, 1.95959}};
2430 // Garfield simulation at UD = -2200V; vd = 2.134cm/microsec, <driftfield> = 753V/cm
2431 Float_t time2200[ktimebin][kZbin] =
2432 {{0.09162, 0.09194, 0.09292, 0.09460, 0.09702, 0.10014,
2433 0.10421, 0.10971, 0.11820, 0.13990, 0.37745},
2434 {0.06581, 0.06618, 0.06730, 0.06915, 0.07173, 0.07507,
2435 0.07931, 0.08497, 0.09368, 0.11609, 0.35560},
2436 {0.03947, 0.04001, 0.04167, 0.04429, 0.04772, 0.05183,
2437 0.05667, 0.06293, 0.07292, 0.09900, 0.34673},
2438 {0.01111, 0.01280, 0.01716, 0.02279, 0.02876, 0.03473,
2439 0.04091, 0.04907, 0.06426, 0.10620, 0.36766},
2440 {0.01113, 0.01285, 0.01719, 0.02276, 0.02863, 0.03452,
2441 0.04076, 0.04960, 0.06745, 0.11419, 0.37139},
2442 {0.03923, 0.03978, 0.04137, 0.04387, 0.04713, 0.05110,
2443 0.05605, 0.06284, 0.07551, 0.10677, 0.36210},
2444 {0.06505, 0.06540, 0.06644, 0.06820, 0.07069, 0.07401,
2445 0.07852, 0.08479, 0.09565, 0.12325, 0.37313},
2446 {0.09107, 0.09127, 0.09181, 0.09291, 0.09474, 0.00000,
2447 0.10883, 0.11528, 0.12789, 0.15865, 0.41313},
2448 {0.12559, 0.12622, 0.12800, 0.13206, 0.14166, 0.19331,
2449 0.16832, 0.16632, 0.17724, 0.21218, 0.47098},
2450 {0.16992, 0.17070, 0.17325, 0.17831, 0.18871, 0.23557,
2451 0.21690, 0.21451, 0.22514, 0.26082, 0.52034},
2452 {0.21640, 0.21722, 0.21987, 0.22500, 0.23540, 0.28097,
2453 0.26399, 0.26154, 0.27214, 0.30784, 0.56734},
2454 {0.26318, 0.26400, 0.26679, 0.27181, 0.28220, 0.32739,
2455 0.31090, 0.30842, 0.31902, 0.35474, 0.61415},
2456 {0.31001, 0.31085, 0.31348, 0.31866, 0.32903, 0.37412,
2457 0.35777, 0.35546, 0.36588, 0.40159, 0.66103},
2458 {0.35687, 0.35769, 0.36033, 0.36556, 0.37588, 0.42094,
2459 0.40523, 0.40214, 0.41273, 0.44841, 0.70785},
2460 {0.40372, 0.40457, 0.40723, 0.41234, 0.42273, 0.46778,
2461 0.45148, 0.44903, 0.45961, 0.49526, 0.75486},
2462 {0.45062, 0.45139, 0.45404, 0.45966, 0.46958, 0.51470,
2463 0.49833, 0.49584, 0.50644, 0.54211, 0.80160},
2464 {0.49742, 0.49825, 0.50088, 0.50605, 0.51644, 0.56148,
2465 0.54518, 0.54270, 0.55330, 0.58897, 0.84854},
2466 {0.54427, 0.54510, 0.54774, 0.55290, 0.56329, 0.60846,
2467 0.59203, 0.58955, 0.60014, 0.63578, 0.89528},
2468 {0.59119, 0.59199, 0.59471, 0.59975, 0.61014, 0.65533,
2469 0.63889, 0.63636, 0.64699, 0.68269, 0.94197},
2470 {0.63866, 0.63880, 0.64145, 0.64664, 0.65701, 0.70639,
2471 0.68574, 0.68325, 0.69385, 0.72949, 0.98900},
2472 {0.68483, 0.68566, 0.68831, 0.69347, 0.70386, 0.74890,
2473 0.73260, 0.73010, 0.74069, 0.77638, 1.03320},
2474 {0.73168, 0.73255, 0.73515, 0.74031, 0.75072, 0.79576,
2475 0.77117, 0.77501, 0.78755, 0.82318, 1.08006},
2476 {0.77854, 0.78310, 0.78200, 0.79525, 0.79756, 0.84281,
2477 0.81803, 0.82393, 0.83441, 0.87008, 1.12692},
2478 {0.82541, 0.82642, 0.82916, 0.83528, 0.84442, 0.89086,
2479 0.87315, 0.87079, 0.88125, 0.91694, 1.17648},
2480 {0.87226, 0.87308, 0.87602, 0.88086, 0.89128, 0.93772,
2481 0.92001, 0.91751, 0.92811, 0.95587, 1.22328},
2482 {0.91921, 0.91994, 0.92256, 0.92772, 0.94713, 0.98566,
2483 0.96690, 0.96436, 0.97495, 1.01064, 1.26882},
2484 {0.96790, 0.96679, 0.96941, 0.97463, 0.99399, 1.03001,
2485 1.01376, 1.01112, 1.02181, 1.05749, 1.31568},
2486 {1.01278, 1.01390, 1.01674, 1.02147, 1.03182, 1.07820,
2487 1.06056, 1.05798, 1.06867, 1.10433, 1.36390},
2488 {1.05964, 1.06076, 1.06331, 1.06833, 1.07870, 1.13297,
2489 1.10742, 1.10520, 1.11543, 1.15120, 1.41069},
2490 {1.10664, 1.10762, 1.10997, 1.11519, 1.12556, 1.17531,
2491 1.15427, 1.14620, 1.16229, 1.19805, 1.45758},
2492 {1.15352, 1.15421, 1.15683, 1.16218, 1.17242, 1.21910,
2493 1.20035, 1.19863, 1.20579, 1.24473, 1.50412},
2494 {1.20019, 1.20115, 1.20369, 1.20892, 1.21928, 1.26913,
2495 1.24721, 1.24549, 1.25605, 1.29159, 1.54920},
2496 {1.24707, 1.24846, 1.25052, 1.25602, 1.26608, 1.31558,
2497 1.29448, 1.29232, 1.30293, 1.33675, 1.59798},
2498 {1.29391, 1.29475, 1.29738, 1.30255, 1.31294, 1.36244,
2499 1.34167, 1.33918, 1.34979, 1.38229, 1.64496},
2500 {1.34078, 1.34304, 1.34424, 1.35565, 1.35980, 1.40930,
2501 1.38853, 1.38229, 1.39664, 1.42863, 1.69162},
2502 {1.38762, 1.38847, 1.39110, 1.39627, 1.40666, 1.45183,
2503 1.43539, 1.43289, 1.44348, 1.47549, 1.73876},
2504 {1.43524, 1.43533, 1.43796, 1.44310, 1.45371, 1.49305,
2505 1.48224, 1.47941, 1.49034, 1.52601, 1.78552},
2506 {1.48122, 1.48219, 1.48482, 1.48991, 1.50030, 1.53991,
2507 1.52898, 1.52653, 1.53653, 1.57282, 1.82386}};
2510 delete [] fTimeStruct1;
2512 fTimeStruct1 = new Float_t[ktimebin*kZbin];
2515 delete [] fTimeStruct2;
2517 fTimeStruct2 = new Float_t[ktimebin*kZbin];
2519 for (Int_t ctrt = 0; ctrt < ktimebin; ctrt++) {
2520 for (Int_t ctrz = 0; ctrz < kZbin; ctrz++) {
2521 if (vdrift > fVDsmp[6]) {
2522 fTimeStruct1[ctrt+ctrz*ktimebin] = time2100[ctrt][ctrz];
2523 fTimeStruct2[ctrt+ctrz*ktimebin] = time2200[ctrt][ctrz];
2527 else if (vdrift > fVDsmp[5]) {
2528 fTimeStruct1[ctrt+ctrz*ktimebin] = time2000[ctrt][ctrz];
2529 fTimeStruct2[ctrt+ctrz*ktimebin] = time2100[ctrt][ctrz];
2533 else if (vdrift > fVDsmp[4]) {
2534 fTimeStruct1[ctrt+ctrz*ktimebin] = time1900[ctrt][ctrz];
2535 fTimeStruct2[ctrt+ctrz*ktimebin] = time2000[ctrt][ctrz];
2539 else if (vdrift > fVDsmp[3]) {
2540 fTimeStruct1[ctrt+ctrz*ktimebin] = time1800[ctrt][ctrz];
2541 fTimeStruct2[ctrt+ctrz*ktimebin] = time1900[ctrt][ctrz];
2545 else if (vdrift > fVDsmp[2]) {
2546 fTimeStruct1[ctrt+ctrz*ktimebin] = time1700[ctrt][ctrz];
2547 fTimeStruct2[ctrt+ctrz*ktimebin] = time1800[ctrt][ctrz];
2551 else if (vdrift > fVDsmp[1]) {
2552 fTimeStruct1[ctrt+ctrz*ktimebin] = time1600[ctrt][ctrz];
2553 fTimeStruct2[ctrt+ctrz*ktimebin] = time1700[ctrt][ctrz];
2557 else if (vdrift > (fVDsmp[0] - 1.0e-5)) {
2558 fTimeStruct1[ctrt+ctrz*ktimebin] = time1500[ctrt][ctrz];
2559 fTimeStruct2[ctrt+ctrz*ktimebin] = time1600[ctrt][ctrz];
2568 //_____________________________________________________________________________
2569 void AliTRDdigitizer::RecalcDiffusion(Float_t vdrift)
2572 // Recalculates the diffusion parameters
2574 // The B=0 case is not really included here.
2575 // Should be revisited!
2578 if (vdrift == fDiffLastVdrift) {
2582 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
2584 AliFatal("Could not get simulation parameters");
2588 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
2590 AliFatal("Could not get common parameters");
2594 AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
2596 AliFatal("Could not get calibration object");
2600 // The magnetic field strength
2601 Double_t x[3] = { 0.0, 0.0, 0.0 };
2603 gAlice->Field(x,b); // b[] is in kilo Gauss
2604 Float_t field = b[2] * 0.1; // Tesla
2606 fDiffLastVdrift = vdrift;
2609 const Int_t kNbL = 5;
2610 Float_t p0L[kNbL] = { 0.007440, 0.007493, 0.007513, 0.007672, 0.007831 };
2611 Float_t p1L[kNbL] = { 0.019252, 0.018912, 0.018636, 0.018012, 0.017343 };
2612 Float_t p2L[kNbL] = { -0.005042, -0.004926, -0.004867, -0.004650, -0.004424 };
2613 Float_t p3L[kNbL] = { 0.000195, 0.000189, 0.000195, 0.000182, 0.000169 };
2615 Int_t ibL = ((Int_t) (10 * (field - 0.15)));
2616 ibL = TMath::Max( 0,ibL);
2617 ibL = TMath::Min(kNbL,ibL);
2619 fDiffusionL = p0L[ibL]
2621 + p2L[ibL] * vdrift*vdrift
2622 + p3L[ibL] * vdrift*vdrift*vdrift;
2625 const Int_t kNbT = 5;
2626 Float_t p0T[kNbT] = { 0.009550, 0.009599, 0.009674, 0.009757, 0.009850 };
2627 Float_t p1T[kNbT] = { 0.006667, 0.006539, 0.006359, 0.006153, 0.005925 };
2628 Float_t p2T[kNbT] = { -0.000853, -0.000798, -0.000721, -0.000635, -0.000541 };
2629 Float_t p3T[kNbT] = { 0.000131, 0.000122, 0.000111, 0.000098, 0.000085 };
2631 Int_t ibT= ((Int_t) (10 * (field - 0.15)));
2632 ibT = TMath::Max( 0,ibT);
2633 ibT = TMath::Min(kNbT,ibT);
2635 fDiffusionT = p0T[ibT]
2637 + p2T[ibT] * vdrift*vdrift
2638 + p3T[ibT] * vdrift*vdrift*vdrift;
2641 fOmegaTau = calibration->GetOmegaTau(vdrift,field);
2644 if (commonParam->ExBOn()) {
2645 fLorentzFactor = 1.0 / (1.0 + fOmegaTau*fOmegaTau);
2648 fLorentzFactor = 1.0;
2653 //_____________________________________________________________________________
2654 Float_t AliTRDdigitizer::GetDiffusionL(Float_t vdrift)
2657 // Returns the longitudinal diffusion coefficient for a given drift
2658 // velocity <vd> and a B-field <b> for Xe/CO2 (15%).
2659 // The values are according to a GARFIELD simulation.
2662 RecalcDiffusion(vdrift);
2668 //_____________________________________________________________________________
2669 Float_t AliTRDdigitizer::GetDiffusionT(Float_t vdrift)
2672 // Returns the transverse diffusion coefficient for a given drift
2673 // velocity <vd> and a B-field <b> for Xe/CO2 (15%).
2674 // The values are according to a GARFIELD simulation.
2677 RecalcDiffusion(vdrift);
2683 //_____________________________________________________________________________
2684 Int_t AliTRDdigitizer::Diffusion(Float_t vdrift, Double_t absdriftlength
2685 , Double_t &lRow, Double_t &lCol, Double_t &lTime)
2688 // Applies the diffusion smearing to the position of a single electron.
2689 // Depends on absolute drift length.
2692 RecalcDiffusion(vdrift);
2694 Float_t driftSqrt = TMath::Sqrt(absdriftlength);
2695 Float_t sigmaT = driftSqrt * fDiffusionT;
2696 Float_t sigmaL = driftSqrt * fDiffusionL;
2697 lRow = gRandom->Gaus(lRow ,sigmaT);
2698 lCol = gRandom->Gaus(lCol ,sigmaT * GetLorentzFactor(vdrift));
2699 lTime = gRandom->Gaus(lTime,sigmaL * GetLorentzFactor(vdrift));
2705 //_____________________________________________________________________________
2706 Float_t AliTRDdigitizer::GetLorentzFactor(Float_t vd)
2709 // Returns the recalculated Lorentz factor
2712 RecalcDiffusion(vd);
2714 return fLorentzFactor;
2718 //_____________________________________________________________________________
2719 Int_t AliTRDdigitizer::ExB(Float_t vdrift, Double_t driftlength, Double_t &lCol)
2722 // Applies E x B effects to the position of a single electron.
2723 // Depends on signed drift length.
2726 RecalcDiffusion(vdrift);
2728 lCol = lCol + fOmegaTau * driftlength;