/* $Id$ */
-///////////////////////////////////////////////////////////////////////////////
-// //
-// Creates and handles digits from TRD hits //
-// Authors: C. Blume (blume@ikf.uni-frankfurt.de) //
-// C. Lippmann //
-// B. Vulpescu //
-// //
-// The following effects are included: //
-// - Diffusion //
-// - ExB effects //
-// - Gas gain including fluctuations //
-// - Pad-response (simple Gaussian approximation) //
-// - Time-response //
-// - Electronics noise //
-// - Electronics gain //
-// - Digitization //
-// The corresponding parameter can be adjusted via the various //
-// Set-functions. If these parameters are not explicitly set, default //
-// values are used (see Init-function). //
-// //
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdlib.h>
+////////////////////////////////////////////////////////////////////////////
+// //
+// Creates and handles digits from TRD hits //
+// //
+// Authors: C. Blume (blume@ikf.uni-frankfurt.de) //
+// C. Lippmann //
+// B. Vulpescu //
+// //
+// The following effects are included: //
+// - Diffusion //
+// - ExB effects //
+// - Gas gain including fluctuations //
+// - Pad-response (simple Gaussian approximation) //
+// - Time-response //
+// - Electronics noise //
+// - Electronics gain //
+// - Digitization //
+// //
+////////////////////////////////////////////////////////////////////////////
#include <TMath.h>
#include <TVector.h>
#include "AliTRDhit.h"
#include "AliTRDdigitizer.h"
#include "AliTRDdataArrayI.h"
+#include "AliTRDdataArrayS.h"
#include "AliTRDdataArrayF.h"
#include "AliTRDsegmentArray.h"
#include "AliTRDdigitsManager.h"
,fMasks(0)
,fCompress(kTRUE)
,fSDigits(kFALSE)
- ,fSDigitsScale(0.0)
,fMergeSignalOnly(kFALSE)
,fDiffLastVdrift(0)
,fDiffusionT(0.0)
,fMasks(0)
,fCompress(kTRUE)
,fSDigits(kFALSE)
- ,fSDigitsScale(0.0)
,fMergeSignalOnly(kFALSE)
,fDiffLastVdrift(0)
,fDiffusionT(0.0)
,fMasks(0)
,fCompress(kTRUE)
,fSDigits(kFALSE)
- ,fSDigitsScale(0.0)
,fMergeSignalOnly(kFALSE)
,fDiffLastVdrift(0)
,fDiffusionT(0.0)
,fMasks(0)
,fCompress(kTRUE)
,fSDigits(kFALSE)
- ,fSDigitsScale(0.0)
,fMergeSignalOnly(kFALSE)
,fDiffLastVdrift(0)
,fDiffusionT(0.0)
fMasks = 0;
fCompress = kTRUE;
fSDigits = kFALSE;
- fSDigitsScale = 100.0;
fMergeSignalOnly = kFALSE;
fTimeLastVdrift = -1;
,fMasks(0)
,fCompress(d.fCompress)
,fSDigits(d.fSDigits)
- ,fSDigitsScale(d.fSDigitsScale)
,fMergeSignalOnly(d.fMergeSignalOnly)
,fDiffLastVdrift(-1)
,fDiffusionT(0.0)
// Assignment operator
//
- if (this != &d) ((AliTRDdigitizer &) d).Copy(*this);
+ if (this != &d) {
+ ((AliTRDdigitizer &) d).Copy(*this);
+ }
return *this;
((AliTRDdigitizer &) d).fMasks = 0;
((AliTRDdigitizer &) d).fCompress = fCompress;
((AliTRDdigitizer &) d).fSDigits = fSDigits;
- ((AliTRDdigitizer &) d).fSDigitsScale = fSDigitsScale;
((AliTRDdigitizer &) d).fMergeSignalOnly = fMergeSignalOnly;
AliTRDdigitizer& target = (AliTRDdigitizer &) d;
}
// The AliRoot file is already connected by the manager
- AliRunLoader *inrl;
+ AliRunLoader *inrl = 0x0;
if (gAlice) {
AliDebug(1,"AliRun object found on file.");
fGeo = new AliTRDgeometry();
// Create a digits manager
- delete fDigitsManager;
+ if (fDigitsManager) {
+ delete fDigitsManager;
+ }
fDigitsManager = new AliTRDdigitsManager();
fDigitsManager->SetSDigits(fSDigits);
fDigitsManager->CreateArrays();
}
+//_____________________________________________________________________________
+void AliTRDdigitizer::AddSDigitsManager(AliTRDdigitsManager *man)
+{
+ //
+ // Add a digits manager for s-digits to the input list.
+ //
+
+ fSDigitsManagerList->Add(man);
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::DeleteSDigitsManager()
+{
+ //
+ // Removes digits manager from the input list.
+ //
+
+ fSDigitsManagerList->Delete();
+
+}
+
//_____________________________________________________________________________
Bool_t AliTRDdigitizer::MakeDigits()
{
// Creates digits.
//
- ///////////////////////////////////////////////////////////////
- // Parameter
- ///////////////////////////////////////////////////////////////
+ AliDebug(1,"Start creating digits");
- // Converts number of electrons to fC
- const Double_t kEl2fC = 1.602e-19 * 1.0e15;
+ if (!fGeo) {
+ AliError("No geometry defined");
+ return kFALSE;
+ }
+
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!calibration) {
+ AliFatal("Could not get calibration object");
+ return kFALSE;
+ }
+
+ const Int_t kNdet = AliTRDgeometry::Ndet();
+
+ Float_t **hits = new Float_t*[kNdet];
+ Int_t *nhit = new Int_t[kNdet];
+
+ AliTRDdataArrayF *signals = 0x0;
+
+ // Sort all hits according to detector number
+ if (!SortHits(hits,nhit)) {
+ AliError("Sorting hits failed");
+ return kFALSE;
+ }
+
+ // Loop through all detectors
+ for (Int_t det = 0; det < kNdet; det++) {
+
+ // Detectors that are switched off, not installed, etc.
+ if (( calibration->IsChamberInstalled(det)) &&
+ (!calibration->IsChamberMasked(det)) &&
+ ( fGeo->ChamberInGeometry(det)) &&
+ (nhit[det] > 0)) {
+
+ signals = new AliTRDdataArrayF();
+
+ // Convert the hits of the current detector to detector signals
+ if (!ConvertHits(det,hits[det],nhit[det],signals)) {
+ AliError(Form("Conversion of hits failed for detector=%d",det));
+ return kFALSE;
+ }
+ // Convert the detector signals to digits or s-digits
+ if (!ConvertSignals(det,signals)) {
+ AliError(Form("Conversion of signals failed for detector=%d",det));
+ return kFALSE;
+ }
+
+ // Delete the signals array
+ delete signals;
+ signals = 0x0;
+
+ } // if: detector status
+
+ } // for: detector
+
+ delete [] hits;
+ delete [] nhit;
+
+ return kTRUE;
+
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::SortHits(Float_t **hits, Int_t *nhit)
+{
+ //
+ // Read all the hits and sorts them according to detector number
+ // in the output array <hits>.
+ //
+
+ AliDebug(1,"Start sorting hits");
+
+ const Int_t kNdet = AliTRDgeometry::Ndet();
+ // Size of the hit vector
+ const Int_t kNhit = 6;
+
+ Float_t *xyz = 0;
+ Int_t nhitTrk = 0;
+
+ Int_t *lhit = new Int_t[kNdet];
+
+ for (Int_t det = 0; det < kNdet; det++) {
+ lhit[det] = 0;
+ nhit[det] = 0;
+ hits[det] = 0;
+ }
+
+ AliLoader *gimme = fRunLoader->GetLoader("TRDLoader");
+ if (!gimme->TreeH()) {
+ gimme->LoadHits();
+ }
+ TTree *hitTree = gimme->TreeH();
+ if (hitTree == 0x0) {
+ AliError("Can not get TreeH");
+ return kFALSE;
+ }
+ fTRD->SetTreeAddress();
+
+ // Get the number of entries in the hit tree
+ // (Number of primary particles creating a hit somewhere)
+ Int_t nTrk = (Int_t) hitTree->GetEntries();
+ AliDebug(1,Form("Found %d tracks",nTrk));
+
+ // Loop through all the tracks in the tree
+ for (Int_t iTrk = 0; iTrk < nTrk; iTrk++) {
+
+ gAlice->ResetHits();
+ hitTree->GetEvent(iTrk);
+
+ if (!fTRD->Hits()) {
+ AliError(Form("No hits array for track = %d",iTrk));
+ continue;
+ }
+
+ // Number of hits for this track
+ nhitTrk = fTRD->Hits()->GetEntriesFast();
+
+ Int_t hitCnt = 0;
+ // Loop through the TRD hits
+ AliTRDhit *hit = (AliTRDhit *) fTRD->FirstHit(-1);
+ while (hit) {
+
+ hitCnt++;
+
+ // Don't analyze test hits
+ if (((Int_t) hit->GetCharge()) != 0) {
+
+ Int_t trk = hit->Track();
+ Int_t det = hit->GetDetector();
+ Int_t q = hit->GetCharge();
+ Float_t x = hit->X();
+ Float_t y = hit->Y();
+ Float_t z = hit->Z();
+ Float_t time = hit->GetTime();
+
+ if (nhit[det] == lhit[det]) {
+ // Inititialization of new detector
+ xyz = new Float_t[kNhit*(nhitTrk+lhit[det])];
+ if (hits[det]) {
+ memcpy(xyz,hits[det],sizeof(Float_t)*kNhit*lhit[det]);
+ delete [] hits[det];
+ }
+ lhit[det] += nhitTrk;
+ hits[det] = xyz;
+ }
+ else {
+ xyz = hits[det];
+ }
+ xyz[nhit[det]*kNhit+0] = x;
+ xyz[nhit[det]*kNhit+1] = y;
+ xyz[nhit[det]*kNhit+2] = z;
+ xyz[nhit[det]*kNhit+3] = q;
+ xyz[nhit[det]*kNhit+4] = trk;
+ xyz[nhit[det]*kNhit+5] = time;
+ nhit[det]++;
+
+ } // if: charge != 0
+
+ hit = (AliTRDhit *) fTRD->NextHit();
+
+ } // for: hits of one track
+
+ } // for: tracks
+
+ delete [] lhit;
+
+ return kTRUE;
+
+}
- ///////////////////////////////////////////////////////////////
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::ConvertHits(Int_t det, Float_t *hits, Int_t nhit
+ , AliTRDdataArrayF *signals)
+{
+ //
+ // Converts the detectorwise sorted hits to detector signals
+ //
+
+ AliDebug(1,Form("Start converting hits for detector=%d (nhits=%d)",det,nhit));
// Number of pads included in the pad response
const Int_t kNpad = 3;
-
// Number of track dictionary arrays
- const Int_t kNDict = AliTRDdigitsManager::kNDict;
+ const Int_t kNdict = AliTRDdigitsManager::kNDict;
+ // Size of the hit vector
+ const Int_t kNhit = 6;
// Width of the amplification region
const Float_t kAmWidth = AliTRDgeometry::AmThick();
const Float_t kDrMin = - 0.5 * kAmWidth;
const Float_t kDrMax = kDrWidth + 0.5 * kAmWidth;
- Int_t iRow;
- Int_t iCol;
- Int_t iTime;
- Int_t iPad;
- Int_t iDict = 0;
- Int_t nBytes = 0;
-
- Int_t totalSizeDigits = 0;
- Int_t totalSizeDict0 = 0;
- Int_t totalSizeDict1 = 0;
- Int_t totalSizeDict2 = 0;
-
- Int_t timeBinTRFend = 1;
+ Int_t iPad = 0;
+ Int_t dict = 0;
+ Int_t timeBinTRFend = 1;
Double_t pos[3];
Double_t loc[3];
Double_t padSignal[kNpad];
Double_t signalOld[kNpad];
- AliTRDdataArrayF *signals = 0;
- AliTRDdataArrayI *digits = 0;
- AliTRDdataArrayI *dictionary[kNDict];
-
- AliTRDpadPlane *padPlane = 0;
-
- AliTRDCalROC *calVdriftROC = 0;
- Float_t calVdriftDetValue = 0.0;
- AliTRDCalROC *calT0ROC = 0;
- Float_t calT0DetValue = 0.0;
- AliTRDCalROC *calGainFactorROC = 0;
- Float_t calGainFactorDetValue = 0.0;
-
- if (!gGeoManager) {
- AliFatal("No geometry manager!");
- }
-
- if (!fGeo) {
- AliError("No geometry defined");
- return kFALSE;
- }
+ AliTRDdataArrayI *dictionary[kNdict];
AliTRDSimParam *simParam = AliTRDSimParam::Instance();
- if (!simParam) {
- AliFatal("Could not get simulation parameters");
- return kFALSE;
- }
-
AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+
if (!commonParam) {
AliFatal("Could not get common parameterss");
return kFALSE;
}
-
- AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!simParam) {
+ AliFatal("Could not get simulation parameters");
+ return kFALSE;
+ }
if (!calibration) {
AliFatal("Could not get calibration object");
return kFALSE;
}
- AliDebug(1,"Start creating digits");
-
- // Create a container for the amplitudes
- AliTRDsegmentArray *signalsArray = new AliTRDsegmentArray("AliTRDdataArrayF"
- ,AliTRDgeometry::Ndet());
-
- AliLoader *gimme = fRunLoader->GetLoader("TRDLoader");
- if (!gimme->TreeH()) {
- gimme->LoadHits();
- }
- TTree *hitTree = gimme->TreeH();
- if (hitTree == 0x0) {
- AliError("Can not get TreeH");
- return kFALSE;
- }
- fTRD->SetTreeAddress();
+ // Get the detector wise calibration objects
+ AliTRDCalROC *calVdriftROC = 0;
+ Float_t calVdriftDetValue = 0.0;
+ const AliTRDCalDet *calVdriftDet = calibration->GetVdriftDet();
+ AliTRDCalROC *calT0ROC = 0;
+ Float_t calT0DetValue = 0.0;
+ const AliTRDCalDet *calT0Det = calibration->GetT0Det();
- // Get the number of entries in the hit tree
- // (Number of primary particles creating a hit somewhere)
- Int_t nTrack = (Int_t) hitTree->GetEntries();
- AliDebug(1,Form("Found %d primary particles",nTrack));
- AliDebug(1,Form("Sampling = %.0fMHz" ,commonParam->GetSamplingFrequency()));
- AliDebug(1,Form("Gain = %d" ,((Int_t) simParam->GetGasGain())));
- AliDebug(1,Form("Noise = %d" ,((Int_t) simParam->GetNoise())));
- if (simParam->TimeStructOn()) {
- AliDebug(1,"Time Structure of drift cells implemented.");
- }
- else {
- AliDebug(1,"Constant drift velocity in drift cells.");
- }
if (simParam->TRFOn()) {
timeBinTRFend = ((Int_t) (simParam->GetTRFhi()
* commonParam->GetSamplingFrequency())) - 1;
- AliDebug(1,Form("Sample the TRF up to bin %d",timeBinTRFend));
}
- // Get the detector wise calibration objects
- const AliTRDCalDet *calVdriftDet = calibration->GetVdriftDet();
- const AliTRDCalDet *calT0Det = calibration->GetT0Det();
- const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
-
- Int_t detectorOld = -1;
- Int_t countHits = 0;
-
Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
Float_t samplingRate = commonParam->GetSamplingFrequency();
Float_t elAttachProp = simParam->GetElAttachProp() / 100.0;
- // Loop through all entries in the tree
- for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) {
+ AliTRDpadPlane *padPlane = fGeo->GetPadPlane(det);
+ Int_t plane = fGeo->GetPlane(det);
+ Float_t row0 = padPlane->GetRow0ROC();
+ Int_t nRowMax = padPlane->GetNrows();
+ Int_t nColMax = padPlane->GetNcols();
+
+ // Create a new array for the signals
+ signals->Allocate(nRowMax,nColMax,nTimeTotal);
+
+ // Create a new array for the dictionary
+ for (dict = 0; dict < kNdict; dict++) {
+ dictionary[dict] = (AliTRDdataArrayI *) fDigitsManager->GetDictionary(det,dict);
+ dictionary[dict]->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+
+ // Loop through the hits in this detector
+ for (Int_t hit = 0; hit < nhit; hit++) {
+
+ pos[0] = hits[hit*kNhit+0];
+ pos[1] = hits[hit*kNhit+1];
+ pos[2] = hits[hit*kNhit+2];
+ Float_t q = hits[hit*kNhit+3];
+ Float_t hittime = hits[hit*kNhit+5];
+ Int_t track = ((Int_t) hits[hit*kNhit+4]);
+
+ Int_t inDrift = 1;
+
+ // Find the current volume with the geo manager
+ gGeoManager->SetCurrentPoint(pos);
+ gGeoManager->FindNode();
+ if (strstr(gGeoManager->GetPath(),"/UK")) {
+ inDrift = 0;
+ }
- gAlice->ResetHits();
- nBytes += hitTree->GetEvent(iTrack);
+ // Get the calibration objects
+ calVdriftROC = calibration->GetVdriftROC(det);
+ calVdriftDetValue = calVdriftDet->GetValue(det);
+ calT0ROC = calibration->GetT0ROC(det);
+ calT0DetValue = calT0Det->GetValue(det);
+
+ // Go to the local coordinate system:
+ // loc[0] - col direction in amplification or driftvolume
+ // loc[1] - row direction in amplification or driftvolume
+ // loc[2] - time direction in amplification or driftvolume
+ gGeoManager->MasterToLocal(pos,loc);
+ if (inDrift) {
+ // Relative to middle of amplification region
+ loc[2] = loc[2] - kDrWidth/2.0 - kAmWidth/2.0;
+ }
- // Loop through the TRD hits
- Int_t iHit = 0;
- AliTRDhit *hit = (AliTRDhit *) fTRD->FirstHit(-1);
- while (hit) {
-
- countHits++;
- iHit++;
+ // The driftlength [cm] (w/o diffusion yet !).
+ // It is negative if the hit is between pad plane and anode wires.
+ Double_t driftlength = -1.0 * loc[2];
- Float_t q = hit->GetCharge();
- // Don't analyze test hits
- if (((Int_t) q) == 0) {
- hit = (AliTRDhit *) fTRD->NextHit();
+ // Stupid patch to take care of TR photons that are absorbed
+ // outside the chamber volume. A real fix would actually need
+ // a more clever implementation of the TR hit generation
+ if (q < 0.0) {
+ if ((loc[1] < padPlane->GetRowEndROC()) ||
+ (loc[1] > padPlane->GetRow0ROC())) {
continue;
}
-
- pos[0] = hit->X();
- pos[1] = hit->Y();
- pos[2] = hit->Z();
- Int_t track = hit->Track();
- Int_t detector = hit->GetDetector();
- Float_t hittime = hit->GetTime();
- Int_t plane = fGeo->GetPlane(detector);
- Int_t chamber = fGeo->GetChamber(detector);
- padPlane = fGeo->GetPadPlane(plane,chamber);
- Float_t row0 = padPlane->GetRow0ROC();
- Int_t nRowMax = padPlane->GetNrows();
- Int_t nColMax = padPlane->GetNcols();
- Int_t inDrift = 1;
-
- // Find the current volume with the geo manager
- gGeoManager->SetCurrentPoint(pos);
- gGeoManager->FindNode();
- if (strstr(gGeoManager->GetPath(),"/UK")) {
- inDrift = 0;
+ if ((driftlength < kDrMin) ||
+ (driftlength > kDrMax)) {
+ continue;
}
+ }
- if (detector != detectorOld) {
+ // Get row and col of unsmeared electron to retrieve drift velocity
+ // The pad row (z-direction)
+ Int_t rowE = padPlane->GetPadRowNumberROC(loc[1]);
+ if (rowE < 0) {
+ continue;
+ }
+ Double_t rowOffset = padPlane->GetPadRowOffsetROC(rowE,loc[1]);
+ // The pad column (rphi-direction)
+ Double_t offsetTilt = padPlane->GetTiltOffset(rowOffset);
+ Int_t colE = padPlane->GetPadColNumber(loc[0]+offsetTilt);
+ if (colE < 0) {
+ continue;
+ }
+ Double_t colOffset = padPlane->GetPadColOffset(colE,loc[0]+offsetTilt);
- // Compress the old one if enabled
- if ((fCompress) && (detectorOld > -1)) {
- signals->Compress(1,0);
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionary[iDict]->Compress(1,0);
- }
+ // Normalized drift length
+ Float_t driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
+ Double_t absdriftlength = TMath::Abs(driftlength);
+ if (commonParam->ExBOn()) {
+ absdriftlength /= TMath::Sqrt(GetLorentzFactor(driftvelocity));
+ }
+
+ // 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++) {
+
+ // Now the real local coordinate system of the ROC
+ // column direction: locC
+ // row direction: locR
+ // time direction: locT
+ // locR and locC are identical to the coordinates of the corresponding
+ // volumina of the drift or amplification region.
+ // locT is defined relative to the wire plane (i.e. middle of amplification
+ // region), meaming locT = 0, and is negative for hits coming from the
+ // drift region.
+ Double_t locC = loc[0];
+ Double_t locR = loc[1];
+ Double_t locT = loc[2];
+
+ // Electron attachment
+ if (simParam->ElAttachOn()) {
+ if (gRandom->Rndm() < (absdriftlength * elAttachProp)) {
+ continue;
}
- // Get the new container
- signals = (AliTRDdataArrayF *) signalsArray->At(detector);
- if (signals->GetNtime() == 0) {
- // Allocate a new one if not yet existing
- signals->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
+
+ // Apply the diffusion smearing
+ if (simParam->DiffusionOn()) {
+ if (!(Diffusion(driftvelocity,absdriftlength,locR,locC,locT))) {
+ continue;
}
- else {
- // Expand an existing one
- if (fCompress) {
- signals->Expand();
- }
- }
- // The same for the dictionary
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionary[iDict] = fDigitsManager->GetDictionary(detector,iDict);
- if (dictionary[iDict]->GetNtime() == 0) {
- dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
- }
- else {
- if (fCompress) dictionary[iDict]->Expand();
- }
- }
-
- // Get the calibration objects
- calVdriftROC = calibration->GetVdriftROC(detector);
- calVdriftDetValue = calVdriftDet->GetValue(detector);
- calT0ROC = calibration->GetT0ROC(detector);
- calT0DetValue = calT0Det->GetValue(detector);
-
- detectorOld = detector;
-
}
- // Go to the local coordinate system:
- // loc[0] - col direction in amplification or driftvolume
- // loc[1] - row direction in amplification or driftvolume
- // loc[2] - time direction in amplification or driftvolume
- gGeoManager->MasterToLocal(pos,loc);
- if (inDrift) {
- // Relative to middle of amplification region
- loc[2] = loc[2] - kDrWidth/2.0 - kAmWidth/2.0;
- }
-
- // The driftlength [cm] (w/o diffusion yet !).
- // It is negative if the hit is between pad plane and anode wires.
- Double_t driftlength = -1.0 * loc[2];
-
- // Stupid patch to take care of TR photons that are absorbed
- // outside the chamber volume. A real fix would actually need
- // a more clever implementation of the TR hit generation
- if (q < 0.0) {
- if ((loc[1] < padPlane->GetRowEndROC()) ||
- (loc[1] > padPlane->GetRow0ROC())) {
- hit = (AliTRDhit *) fTRD->NextHit();
+ // Apply E x B effects (depends on drift direction)
+ if (commonParam->ExBOn()) {
+ if (!(ExB(driftvelocity,driftlength,locC))) {
continue;
}
- if ((driftlength < kDrMin) ||
- (driftlength > kDrMax)) {
- hit = (AliTRDhit *) fTRD->NextHit();
- continue;
- }
}
- // Get row and col of unsmeared electron to retrieve drift velocity
+ // The electron position after diffusion and ExB in pad coordinates.
// The pad row (z-direction)
- Int_t rowE = padPlane->GetPadRowNumberROC(loc[1]);
- if (rowE < 0) {
- hit = (AliTRDhit *) fTRD->NextHit();
- continue;
- }
- Double_t rowOffset = padPlane->GetPadRowOffsetROC(rowE,loc[1]);
+ rowE = padPlane->GetPadRowNumberROC(locR);
+ if (rowE < 0) continue;
+ rowOffset = padPlane->GetPadRowOffsetROC(rowE,locR);
// The pad column (rphi-direction)
- Double_t offsetTilt = padPlane->GetTiltOffset(rowOffset);
- Int_t colE = padPlane->GetPadColNumber(loc[0]+offsetTilt);
- if (colE < 0) {
- hit = (AliTRDhit *) fTRD->NextHit();
- continue;
+ offsetTilt = padPlane->GetTiltOffset(rowOffset);
+ colE = padPlane->GetPadColNumber(locC+offsetTilt);
+ if (colE < 0) continue;
+ colOffset = padPlane->GetPadColOffset(colE,locC+offsetTilt);
+
+ // Also re-retrieve drift velocity because col and row may have changed
+ driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
+ Float_t t0 = calT0DetValue + calT0ROC->GetValue(colE,rowE);
+
+ // Convert the position to drift time [mus], using either constant drift velocity or
+ // time structure of drift cells (non-isochronity, GARFIELD calculation).
+ // Also add absolute time of hits to take pile-up events into account properly
+ Double_t drifttime;
+ if (simParam->TimeStructOn()) {
+ // Get z-position with respect to anode wire
+ Double_t zz = row0 - locR + simParam->GetAnodeWireOffset();
+ zz -= ((Int_t)(2 * zz)) / 2.0;
+ if (zz > 0.25) {
+ zz = 0.5 - zz;
+ }
+ // Use drift time map (GARFIELD)
+ drifttime = TimeStruct(driftvelocity,0.5*kAmWidth-1.0*locT,zz)
+ + hittime;
+ }
+ else {
+ // Use constant drift velocity
+ drifttime = -1.0 * locT / driftvelocity
+ + hittime;
+ }
+
+ // Apply the gas gain including fluctuations
+ Double_t ggRndm = 0.0;
+ do {
+ ggRndm = gRandom->Rndm();
+ } while (ggRndm <= 0);
+ Int_t signal = (Int_t) (-(simParam->GetGasGain()) * TMath::Log(ggRndm));
+
+ // Apply the pad response
+ if (simParam->PRFOn()) {
+ // The distance of the electron to the center of the pad
+ // in units of pad width
+ Double_t dist = (colOffset - 0.5*padPlane->GetColSize(colE))
+ / padPlane->GetColSize(colE);
+ // This is a fixed parametrization, i.e. not dependent on
+ // calibration values !
+ if (!(calibration->PadResponse(signal,dist,plane,padSignal))) continue;
}
- Double_t colOffset = padPlane->GetPadColOffset(colE,loc[0]+offsetTilt);
-
- Float_t driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
-
- // Normalized drift length
- Double_t absdriftlength = TMath::Abs(driftlength);
- if (commonParam->ExBOn()) {
- absdriftlength /= TMath::Sqrt(GetLorentzFactor(driftvelocity));
+ else {
+ padSignal[0] = 0.0;
+ padSignal[1] = signal;
+ padSignal[2] = 0.0;
}
- // 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++) {
-
- // Now the real local coordinate system of the ROC
- // column direction: locC
- // row direction: locR
- // time direction: locT
- // locR and locC are identical to the coordinates of the corresponding
- // volumina of the drift or amplification region.
- // locT is defined relative to the wire plane (i.e. middle of amplification
- // region), meaming locT = 0, and is negative for hits coming from the
- // drift region.
- Double_t locC = loc[0];
- Double_t locR = loc[1];
- Double_t locT = loc[2];
-
- // Electron attachment
- if (simParam->ElAttachOn()) {
- if (gRandom->Rndm() < (absdriftlength * elAttachProp)) {
- continue;
- }
- }
+ // The time bin (always positive), with t0 distortion
+ Double_t timeBinIdeal = drifttime * samplingRate + t0;
+ // Protection
+ if (TMath::Abs(timeBinIdeal) > 2*nTimeTotal) {
+ timeBinIdeal = 2 * nTimeTotal;
+ }
+ Int_t timeBinTruncated = ((Int_t) timeBinIdeal);
+ // The distance of the position to the middle of the timebin
+ Double_t timeOffset = ((Float_t) timeBinTruncated
+ + 0.5 - timeBinIdeal) / samplingRate;
- // Apply the diffusion smearing
- if (simParam->DiffusionOn()) {
- if (!(Diffusion(driftvelocity,absdriftlength,locR,locC,locT))) {
- continue;
- }
+ // 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(timeBinTruncated,0)
+ ;iTimeBin < TMath::Min(timeBinTruncated+timeBinTRFend,nTimeTotal)
+ ;iTimeBin++) {
+
+ // Apply the time response
+ Double_t timeResponse = 1.0;
+ Double_t crossTalk = 0.0;
+ Double_t time = (iTimeBin - timeBinTruncated) / samplingRate + timeOffset;
+ if (simParam->TRFOn()) {
+ timeResponse = simParam->TimeResponse(time);
}
-
- // Apply E x B effects (depends on drift direction)
- if (commonParam->ExBOn()) {
- if (!(ExB(driftvelocity,driftlength,locC))) {
- continue;
- }
+ if (simParam->CTOn()) {
+ crossTalk = simParam->CrossTalk(time);
}
- // The electron position after diffusion and ExB in pad coordinates.
- // The pad row (z-direction)
- rowE = padPlane->GetPadRowNumberROC(locR);
- if (rowE < 0) continue;
- rowOffset = padPlane->GetPadRowOffsetROC(rowE,locR);
-
- // The pad column (rphi-direction)
- offsetTilt = padPlane->GetTiltOffset(rowOffset);
- colE = padPlane->GetPadColNumber(locC+offsetTilt);
- if (colE < 0) continue;
- colOffset = padPlane->GetPadColOffset(colE,locC+offsetTilt);
-
- // Also re-retrieve drift velocity because col and row may have changed
- driftvelocity = calVdriftDetValue * calVdriftROC->GetValue(colE,rowE);
- Float_t t0 = calT0DetValue + calT0ROC->GetValue(colE,rowE);
-
- // Convert the position to drift time [mus], using either constant drift velocity or
- // time structure of drift cells (non-isochronity, GARFIELD calculation).
- // Also add absolute time of hits to take pile-up events into account properly
- Double_t drifttime;
- if (simParam->TimeStructOn()) {
- // Get z-position with respect to anode wire
- Double_t zz = row0 - locR + simParam->GetAnodeWireOffset();
- zz -= ((Int_t)(2 * zz)) / 2.0;
- if (zz > 0.25) {
- zz = 0.5 - zz;
- }
- // Use drift time map (GARFIELD)
- drifttime = TimeStruct(driftvelocity,0.5*kAmWidth-1.0*locT,zz)
- + hittime;
- }
- else {
- // Use constant drift velocity
- drifttime = -1.0 * locT / driftvelocity
- + hittime;
- }
+ signalOld[0] = 0.0;
+ signalOld[1] = 0.0;
+ signalOld[2] = 0.0;
- // Apply the gas gain including fluctuations
- Double_t ggRndm = 0.0;
- do {
- ggRndm = gRandom->Rndm();
- } while (ggRndm <= 0);
- Int_t signal = (Int_t) (-(simParam->GetGasGain()) * TMath::Log(ggRndm));
-
- // Apply the pad response
- if (simParam->PRFOn()) {
- // The distance of the electron to the center of the pad
- // in units of pad width
- Double_t dist = (colOffset - 0.5*padPlane->GetColSize(colE))
- / padPlane->GetColSize(colE);
- // This is still the fixed parametrization, i.e. not dependent on
- // calibration values !!!!
- if (!(calibration->PadResponse(signal,dist,plane,padSignal))) continue;
- }
- else {
- padSignal[0] = 0.0;
- padSignal[1] = signal;
- padSignal[2] = 0.0;
- }
+ for (iPad = 0; iPad < kNpad; iPad++) {
- // The time bin (always positive), with t0 distortion
- Double_t timeBinIdeal = drifttime * samplingRate + t0;
- // Protection
- if (TMath::Abs(timeBinIdeal) > 2*nTimeTotal) {
- timeBinIdeal = 2 * nTimeTotal;
- }
- Int_t timeBinTruncated = (Int_t) timeBinIdeal;
- // The distance of the position to the middle of the timebin
- Double_t timeOffset = ((Float_t) timeBinTruncated
- + 0.5 - timeBinIdeal) / samplingRate;
-
- // 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(timeBinTruncated,0)
- ;iTimeBin < TMath::Min(timeBinTruncated+timeBinTRFend,nTimeTotal)
- ;iTimeBin++) {
-
- // Apply the time response
- Double_t timeResponse = 1.0;
- Double_t crossTalk = 0.0;
- Double_t time = (iTimeBin - timeBinTruncated) / samplingRate + timeOffset;
- if (simParam->TRFOn()) {
- timeResponse = simParam->TimeResponse(time);
- }
- if (simParam->CTOn()) {
- crossTalk = simParam->CrossTalk(time);
- }
+ Int_t colPos = colE + iPad - 1;
+ if (colPos < 0) continue;
+ if (colPos >= nColMax) break;
- signalOld[0] = 0.0;
- signalOld[1] = 0.0;
- signalOld[2] = 0.0;
+ // Add the signals
+ signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iTimeBin);
- for (iPad = 0; iPad < kNpad; iPad++) {
-
- Int_t colPos = colE + iPad - 1;
- if (colPos < 0) continue;
- if (colPos >= nColMax) break;
-
- // Add the signals
- Int_t iCurrentTimeBin = iTimeBin;
- signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iCurrentTimeBin);
- if (colPos != colE) {
- signalOld[iPad] += padSignal[iPad] * (timeResponse + crossTalk);
- }
- else {
- signalOld[iPad] += padSignal[iPad] * timeResponse;
- }
- signals->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,signalOld[iPad]);
+ if (colPos != colE) {
+ // Cross talk added to non-central pads
+ signalOld[iPad] += padSignal[iPad]
+ * (timeResponse + crossTalk);
+ }
+ else {
+ // W/o cross talk at central pad
+ signalOld[iPad] += padSignal[iPad]
+ * timeResponse;
+ }
- // 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;
- }
+ signals->SetDataUnchecked(rowE,colPos,iTimeBin,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] > 0.0) {
+ for (dict = 0; dict < kNdict; dict++) {
+ Int_t oldTrack = dictionary[dict]->GetDataUnchecked(rowE
+ ,colPos
+ ,iTimeBin);
+ if (oldTrack == track+1) break;
+ if (oldTrack == 0) {
+ dictionary[dict]->SetDataUnchecked(rowE,colPos,iTimeBin,track+1);
+ break;
}
}
+ }
- } // Loop: pads
+ } // Loop: pads
- } // Loop: time bins
+ } // Loop: time bins
- } // Loop: electrons of a single hit
+ } // Loop: electrons of a single hit
- hit = (AliTRDhit *) fTRD->NextHit();
+ } // Loop: hits
- } // Loop: hits of one primary track
+ AliDebug(2,Form("Finished analyzing %d hits",nhit));
- } // Loop: primary tracks
+ return kTRUE;
- AliDebug(1,Form("Finished analyzing %d hits",countHits));
+}
- //____________________________________________________________________
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::ConvertSignals(Int_t det, AliTRDdataArrayF *signals)
+{
//
- // Create (s)digits
- //____________________________________________________________________
+ // Convert signals to digits
//
- // The coupling factor
- Double_t coupling = simParam->GetPadCoupling()
- * simParam->GetTimeCoupling();
-
- // The conversion factor
- Double_t convert = kEl2fC
- * simParam->GetChipGain();
-
- // Loop through all chambers to finalize the digits
- Int_t iDetBeg = 0;
- Int_t iDetEnd = AliTRDgeometry::Ndet();
- for (Int_t iDet = iDetBeg; iDet < iDetEnd; iDet++) {
+ AliDebug(1,Form("Start converting the signals for detector %d",det));
- 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);
-
- Double_t *inADC = new Double_t[nTimeTotal];
- Double_t *outADC = new Double_t[nTimeTotal];
-
- // Add a container for the digits of this detector
- digits = fDigitsManager->GetDigits(iDet);
- // Allocate memory space for the digits buffer
- if (digits->GetNtime() == 0) {
- 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,nTimeTotal);
+ if (fSDigits) {
+ // Convert the signal array to s-digits
+ if (!Signal2SDigits(det,signals)) {
+ return kFALSE;
}
- else {
- // Expand the container if neccessary
- if (fCompress) signals->Expand();
- }
- // Create the missing dictionary containers
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionary[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
- if (dictionary[iDict]->GetNtime() == 0) {
- dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
- }
+ }
+ else {
+ // Convert the signal array to digits
+ if (!Signal2ADC(det,signals)) {
+ return kFALSE;
}
+ }
- Int_t nDigits = 0;
-
- // Don't create noise in detectors that are switched off / not installed, etc.
- if (( calibration->IsChamberInstalled(iDet)) &&
- (!calibration->IsChamberMasked(iDet)) &&
- ( fGeo->ChamberInGeometry(iDet))) {
-
- // Get the calibration objects
- calGainFactorROC = calibration->GetGainFactorROC(iDet);
- calGainFactorDetValue = calGainFactorDet->GetValue(iDet);
-
- // Create the digits for this chamber
- for (iRow = 0; iRow < nRowMax; iRow++ ) {
- for (iCol = 0; iCol < nColMax; iCol++ ) {
-
- // Check whether pad is masked
- // Bridged pads are not considered yet!!!
- if (calibration->IsPadMasked(iDet,iCol,iRow)) {
- continue;
- }
-
- // Create summable digits
- if (fSDigits) {
-
- for (iTime = 0; iTime < nTimeTotal; iTime++) {
- Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
- signalAmp *= fSDigitsScale;
- signalAmp = TMath::Min(signalAmp,(Float_t) 1.0e9);
- Int_t adc = (Int_t) signalAmp;
- if (adc > 0) nDigits++;
- digits->SetDataUnchecked(iRow,iCol,iTime,adc);
- }
+ // Compress the arrays
+ CompressOutputArrays(det);
- }
- // Create normal digits
- else {
+ return kTRUE;
- Float_t padgain = calGainFactorDetValue
- * calGainFactorROC->GetValue(iCol,iRow);
- if (padgain <= 0) {
- AliError(Form("Not a valid gain %f, %d %d %d",padgain,iDet,iCol,iRow));
- }
+}
- for (iTime = 0; iTime < nTimeTotal; iTime++) {
-
- Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime);
-
- // Pad and time coupling
- signalAmp *= coupling;
- // Gain factors
- signalAmp *= padgain;
-
- // Add the noise, starting from minus ADC baseline in electrons
- Double_t baselineEl = simParam->GetADCbaseline()
- * (simParam->GetADCinRange() / simParam->GetADCoutRange())
- / convert;
- signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,simParam->GetNoise())
- ,-baselineEl);
- // Convert to mV
- signalAmp *= convert;
- // Add ADC baseline in mV
- signalAmp += simParam->GetADCbaseline()
- * (simParam->GetADCinRange() / simParam->GetADCoutRange());
- // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
- // signal is larger than fADCinRange
- Int_t adc = 0;
- if (signalAmp >= simParam->GetADCinRange()) {
- adc = ((Int_t) simParam->GetADCoutRange());
- }
- else {
- adc = TMath::Nint(signalAmp * (simParam->GetADCoutRange()
- / simParam->GetADCinRange()));
- }
-
- inADC[iTime] = adc;
- outADC[iTime] = adc;
-
- }
-
- for (iTime = 0; iTime < nTimeTotal; iTime++) {
- //if (outADC[iTime] != 0 ) { // Now this is enough because there is ZS in raw simulator
- // Reintroduce threshold as a temporary fix for the digits file size problem
- if (outADC[iTime] > (simParam->GetADCbaseline() + 3)) {
- nDigits++;
- digits->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
- }
- }
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::Signal2ADC(Int_t det, AliTRDdataArrayF *signals)
+{
+ //
+ // Converts the sampled electron signals to ADC values for a given chamber
+ //
- }
+ AliDebug(1,Form("Start converting signals to ADC values for detector=%d",det));
- }
- }
-
- }
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!calibration) {
+ AliFatal("Could not get calibration object");
+ return kFALSE;
+ }
- // Compress the arrays
- digits->Compress(1,0);
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionary[iDict]->Compress(1,0);
- }
+ AliTRDSimParam *simParam = AliTRDSimParam::Instance();
+ if (!simParam) {
+ AliFatal("Could not get simulation parameters");
+ return kFALSE;
+ }
- totalSizeDigits += digits->GetSize();
- totalSizeDict0 += dictionary[0]->GetSize();
- totalSizeDict1 += dictionary[1]->GetSize();
- totalSizeDict2 += dictionary[2]->GetSize();
+ // Converts number of electrons to fC
+ const Double_t kEl2fC = 1.602e-19 * 1.0e15;
- if (nDigits > 0) {
- Float_t nPixel = nRowMax * nColMax * nTimeTotal;
- AliDebug(1,Form("Found %d digits in detector %d (%3.0f)."
- ,nDigits,iDet
- ,100.0 * ((Float_t) nDigits) / nPixel));
- }
+ // Coupling factor
+ Double_t coupling = simParam->GetPadCoupling()
+ * simParam->GetTimeCoupling();
+ // Electronics conversion factor
+ Double_t convert = kEl2fC
+ * simParam->GetChipGain();
+ // ADC conversion factor
+ Double_t adcConvert = simParam->GetADCoutRange()
+ / simParam->GetADCinRange();
+ // The electronics baseline in mV
+ Double_t baseline = simParam->GetADCbaseline()
+ / adcConvert;
+ // The electronics baseline in electrons
+ Double_t baselineEl = baseline
+ / convert;
+
+ Int_t row = 0;
+ Int_t col = 0;
+ Int_t time = 0;
+
+ Int_t nRowMax = fGeo->GetPadPlane(det)->GetNrows();
+ Int_t nColMax = fGeo->GetPadPlane(det)->GetNcols();
+ Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
- if (fCompress) {
- signals->Compress(1,0);
- }
+ // The gainfactor calibration objects
+ const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
+ AliTRDCalROC *calGainFactorROC = 0;
+ Float_t calGainFactorDetValue = 0.0;
- delete [] inADC;
- delete [] outADC;
+ AliTRDdataArrayS *digits = 0x0;
+ if (!signals) {
+ AliError(Form("Signals array for detector %d does not exist\n",det));
+ return kFALSE;
+ }
+ if (signals->HasData()) {
+ // Expand the container if neccessary
+ signals->Expand();
+ }
+ else {
+ // Create missing containers
+ signals->Allocate(nRowMax,nColMax,nTimeTotal);
}
- if (signalsArray) {
- delete signalsArray;
- signalsArray = 0;
+ // Get the container for the digits of this detector
+ if (fDigitsManager->HasSDigits()) {
+ AliError("Digits manager has s-digits");
+ return kFALSE;
+ }
+ digits = (AliTRDdataArrayS *) fDigitsManager->GetDigits(det);
+ // Allocate memory space for the digits buffer
+ if (!digits->HasData()) {
+ digits->Allocate(nRowMax,nColMax,nTimeTotal);
}
- AliDebug(1,Form("Total number of analyzed hits = %d",countHits));
- AliDebug(1,Form("Total digits data size = %d, %d, %d, %d",totalSizeDigits
- ,totalSizeDict0
- ,totalSizeDict1
- ,totalSizeDict2));
+ // Get the calibration objects
+ calGainFactorROC = calibration->GetGainFactorROC(det);
+ calGainFactorDetValue = calGainFactorDet->GetValue(det);
- return kTRUE;
+ // Create the digits for this chamber
+ for (row = 0; row < nRowMax; row++ ) {
+ for (col = 0; col < nColMax; col++ ) {
-}
+ // Check whether pad is masked
+ // Bridged pads are not considered yet!!!
+ if (calibration->IsPadMasked(det,col,row)) {
+ continue;
+ }
-//_____________________________________________________________________________
-void AliTRDdigitizer::AddSDigitsManager(AliTRDdigitsManager *man)
-{
- //
- // Add a digits manager for s-digits to the input list.
- //
+ // The gain factors
+ Float_t padgain = calGainFactorDetValue
+ * calGainFactorROC->GetValue(col,row);
+ if (padgain <= 0) {
+ AliError(Form("Not a valid gain %f, %d %d %d",padgain,det,col,row));
+ }
- fSDigitsManagerList->Add(man);
+ for (time = 0; time < nTimeTotal; time++) {
+
+ // Get the signal amplitude
+ Float_t signalAmp = signals->GetDataUnchecked(row,col,time);
+ // Pad and time coupling
+ signalAmp *= coupling;
+ // Gain factors
+ signalAmp *= padgain;
+
+ // Add the noise, starting from minus ADC baseline in electrons
+ signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,simParam->GetNoise())
+ ,-baselineEl);
+
+ // Convert to mV
+ signalAmp *= convert;
+ // Add ADC baseline in mV
+ signalAmp += baseline;
+
+ // Convert to ADC counts. Set the overflow-bit fADCoutRange if the
+ // signal is larger than fADCinRange
+ Short_t adc = 0;
+ if (signalAmp >= simParam->GetADCinRange()) {
+ adc = ((Short_t) simParam->GetADCoutRange());
+ }
+ else {
+ adc = TMath::Nint(signalAmp * adcConvert);
+ }
-}
+ // Store the amplitude of the digit if above threshold
+ //if (adc != 0) {
+ // Use temporarily a threshold to reduce the digits file size
+ if (adc > (simParam->GetADCbaseline() + 2)) {
+ digits->SetDataUnchecked(row,col,time,adc);
+ }
-//_____________________________________________________________________________
-void AliTRDdigitizer::DeleteSDigitsManager()
-{
- //
- // Removes digits manager from the input list.
- //
+ } // for: time
+ } // for: col
+ } // for: row
- fSDigitsManagerList->Delete();
+ return kTRUE;
}
//_____________________________________________________________________________
-Bool_t AliTRDdigitizer::ConvertSDigits()
+Bool_t AliTRDdigitizer::Signal2SDigits(Int_t det, AliTRDdataArrayF *signals)
{
//
- // Converts s-digits to normal digits
+ // Converts the sampled electron signals to s-digits
//
- // Number of track dictionary arrays
- const Int_t kNDict = AliTRDdigitsManager::kNDict;
+ AliDebug(1,Form("Start converting signals to s-digits for detector=%d",det));
- // Converts number of electrons to fC
- const Double_t kEl2fC = 1.602e-19 * 1.0e15;
-
- Int_t iDict = 0;
- Int_t iRow;
- Int_t iCol;
- Int_t iTime;
-
- AliTRDCalROC *calGainFactorROC = 0;
- Float_t calGainFactorDetValue = 0.0;
-
- AliTRDSimParam *simParam = AliTRDSimParam::Instance();
- if (!simParam) {
- AliFatal("Could not get simulation parameters");
- return kFALSE;
- }
-
AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
if (!calibration) {
AliFatal("Could not get calibration object");
return kFALSE;
}
-
- Double_t sDigitsScale = 1.0 / GetSDigitsScale();
- Double_t noise = simParam->GetNoise();
- Double_t padCoupling = simParam->GetPadCoupling();
- Double_t timeCoupling = simParam->GetTimeCoupling();
- Double_t chipGain = simParam->GetChipGain();
- Double_t coupling = padCoupling * timeCoupling;
- Double_t convert = kEl2fC * chipGain;
- Double_t adcInRange = simParam->GetADCinRange();
- Double_t adcOutRange = simParam->GetADCoutRange();
- Int_t adcBaseline = simParam->GetADCbaseline();
- Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
-
- AliTRDdataArrayI *digitsIn;
- AliTRDdataArrayI *digitsOut;
- AliTRDdataArrayI *dictionaryIn[kNDict];
- AliTRDdataArrayI *dictionaryOut[kNDict];
-
- // Get the detector wise calibration objects
- const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
-
- // Loop through the detectors
- 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);
-
- Double_t *inADC = new Double_t[nTimeTotal];
- Double_t *outADC = new Double_t[nTimeTotal];
-
- digitsIn = fSDigitsManager->GetDigits(iDet);
- digitsIn->Expand();
- digitsOut = fDigitsManager->GetDigits(iDet);
- digitsOut->Allocate(nRowMax,nColMax,nTimeTotal);
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionaryIn[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
- dictionaryIn[iDict]->Expand();
- dictionaryOut[iDict] = fDigitsManager->GetDictionary(iDet,iDict);
- dictionaryOut[iDict]->Allocate(nRowMax,nColMax,nTimeTotal);
- }
-
- // Don't create noise in detectors that are switched off / not installed, etc.
- if (( calibration->IsChamberInstalled(iDet)) &&
- (!calibration->IsChamberMasked(iDet)) &&
- ( fGeo->ChamberInGeometry(iDet))) {
-
- // Get the calibration objects
- calGainFactorROC = calibration->GetGainFactorROC(iDet);
- calGainFactorDetValue = calGainFactorDet->GetValue(iDet);
-
- for (iRow = 0; iRow < nRowMax; iRow++ ) {
- for (iCol = 0; iCol < nColMax; iCol++ ) {
-
- // Check whether pad is masked
- // Bridged pads are not considered yet!!!
- if (calibration->IsPadMasked(iDet,iCol,iRow)) {
- continue;
- }
-
- Float_t padgain = calGainFactorDetValue
- * calGainFactorROC->GetValue(iCol,iRow);
- if (padgain <= 0) {
- AliError(Form("Not a valid gain %f, %d %d %d",padgain,iDet,iCol,iRow));
- }
- for (iTime = 0; iTime < nTimeTotal; iTime++) {
-
- // Scale s-digits to normal digits
- Double_t signal = (Double_t) digitsIn->GetDataUnchecked(iRow,iCol,iTime);
- signal *= sDigitsScale;
- // Pad and time coupling
- signal *= coupling;
- // Gain factors
- signal *= padgain;
- // Add the noise, starting from minus ADC baseline in electrons
- Double_t baselineEl = adcBaseline * (adcInRange / adcOutRange) / convert;
- signal = TMath::Max((Double_t) gRandom->Gaus(signal,noise),-baselineEl);
- // Convert to mV
- signal *= convert;
- // add ADC baseline in mV
- signal += adcBaseline * (adcInRange / adcOutRange);
- // Convert to ADC counts. Set the overflow-bit adcOutRange if the
- // signal is larger than adcInRange
- Int_t adc = 0;
- if (signal >= adcInRange) {
- adc = ((Int_t) adcOutRange);
- }
- else {
- adc = TMath::Nint(signal * (adcOutRange / adcInRange));
- }
- inADC[iTime] = adc;
- outADC[iTime] = adc;
+ Int_t row = 0;
+ Int_t col = 0;
+ Int_t time = 0;
- }
+ Int_t nRowMax = fGeo->GetPadPlane(det)->GetNrows();
+ Int_t nColMax = fGeo->GetPadPlane(det)->GetNcols();
+ Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
- for (iTime = 0; iTime < nTimeTotal; iTime++) {
- // Store the amplitude of the digit if above threshold
- //if (outADC[iTime] != 0) { // now this is ok because there is ZS in raw simulation
- // Reintroduce the threshold as a temporary fix for the digits file size
- if (outADC[iTime] > (adcBaseline + 3)) {
- digitsOut->SetDataUnchecked(iRow,iCol,iTime,((Int_t) outADC[iTime]));
- // Copy the dictionary
- for (iDict = 0; iDict < kNDict; iDict++) {
- Int_t track = dictionaryIn[iDict]->GetDataUnchecked(iRow,iCol,iTime);
- dictionaryOut[iDict]->SetDataUnchecked(iRow,iCol,iTime,track);
- }
- }
- }
+ // Get the container for the digits of this detector
+ if (!fDigitsManager->HasSDigits()) {
+ AliError("Digits manager has no s-digits");
+ return kFALSE;
+ }
+ AliTRDdataArrayF *digits = (AliTRDdataArrayF *) fDigitsManager->GetDigits(det);
+ // Allocate memory space for the digits buffer
+ if (!digits->HasData()) {
+ digits->Allocate(nRowMax,nColMax,nTimeTotal);
+ }
- }
- }
+ // Create the sdigits for this chamber
+ for (row = 0; row < nRowMax; row++ ) {
+ for (col = 0; col < nColMax; col++ ) {
+ for (time = 0; time < nTimeTotal; time++) {
+ digits->SetDataUnchecked(row
+ ,col
+ ,time
+ ,signals->GetDataUnchecked(row,col,time));
+ } // for: time
+ } // for: col
+ } // for: row
- }
+ return kTRUE;
- if (fCompress) {
- digitsIn->Compress(1,0);
- digitsOut->Compress(1,0);
- for (iDict = 0; iDict < kNDict; iDict++) {
- dictionaryIn[iDict]->Compress(1,0);
- dictionaryOut[iDict]->Compress(1,0);
- }
- }
+}
- delete [] inADC;
- delete [] outADC;
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::SDigits2Digits()
+{
+ //
+ // Merges the input s-digits and converts them to normal digits
+ //
- }
+ if (!MergeSDigits()) {
+ return kFALSE;
+ }
- return kTRUE;
+ return ConvertSDigits();
}
Int_t iDict = 0;
Int_t jDict = 0;
- AliTRDdataArrayI *digitsA;
- AliTRDdataArrayI *digitsB;
- AliTRDdataArrayI *dictionaryA[kNDict];
- AliTRDdataArrayI *dictionaryB[kNDict];
+ AliTRDdataArrayF *digitsA;
+ AliTRDdataArrayF *digitsB;
+ AliTRDdataArrayI *dictionaryA[kNDict];
+ AliTRDdataArrayI *dictionaryB[kNDict];
+ AliTRDdigitsManager *mergeSDigitsManager = 0x0;
// Get the first s-digits
fSDigitsManager = (AliTRDdigitsManager *) fSDigitsManagerList->First();
}
// Loop through the other sets of s-digits
- AliTRDdigitsManager *mergeSDigitsManager;
mergeSDigitsManager = (AliTRDdigitsManager *)
fSDigitsManagerList->After(fSDigitsManager);
// Loop through the detectors
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 nRowMax = fGeo->GetPadPlane(iDet)->GetNrows();
+ Int_t nColMax = fGeo->GetPadPlane(iDet)->GetNcols();
// Loop through the pixels of one detector and add the signals
- digitsA = fSDigitsManager->GetDigits(iDet);
- digitsB = mergeSDigitsManager->GetDigits(iDet);
+ digitsA = (AliTRDdataArrayF *) fSDigitsManager->GetDigits(iDet);
+ digitsB = (AliTRDdataArrayF *) mergeSDigitsManager->GetDigits(iDet);
digitsA->Expand();
digitsB->Expand();
for (iDict = 0; iDict < kNDict; iDict++) {
- dictionaryA[iDict] = fSDigitsManager->GetDictionary(iDet,iDict);
- dictionaryB[iDict] = mergeSDigitsManager->GetDictionary(iDet,iDict);
+ dictionaryA[iDict] = (AliTRDdataArrayI *) fSDigitsManager->GetDictionary(iDet,iDict);
+ dictionaryB[iDict] = (AliTRDdataArrayI *) mergeSDigitsManager->GetDictionary(iDet,iDict);
dictionaryA[iDict]->Expand();
dictionaryB[iDict]->Expand();
}
for (Int_t iTime = 0; iTime < nTimeTotal; iTime++) {
// Add the amplitudes of the summable digits
- Int_t ampA = digitsA->GetDataUnchecked(iRow,iCol,iTime);
- Int_t ampB = digitsB->GetDataUnchecked(iRow,iCol,iTime);
+ Float_t ampA = digitsA->GetDataUnchecked(iRow,iCol,iTime);
+ Float_t ampB = digitsB->GetDataUnchecked(iRow,iCol,iTime);
ampA += ampB;
digitsA->SetDataUnchecked(iRow,iCol,iTime,ampA);
if (trackA == 0) {
trackA = trackB + fMasks[iMerge];
dictionaryA[iDict]->SetDataUnchecked(iRow,iCol,iTime,trackA);
- }
- }
- }
- }
+ } // if: track A == 0
+ } // for: jDict
+ } // if: fMasks and trackB > 0
+ } // for: iDict
- }
- }
- }
+ } // for: iTime
+ } // for: iCol
+ } // for: iRow
- }
+ } // if: doMerge
+
+ mergeSDigitsManager->RemoveDigits(iDet);
+ mergeSDigitsManager->RemoveDictionaries(iDet);
if (fCompress) {
digitsA->Compress(1,0);
- digitsB->Compress(1,0);
for (iDict = 0; iDict < kNDict; iDict++) {
dictionaryA[iDict]->Compress(1,0);
- dictionaryB[iDict]->Compress(1,0);
}
}
- }
+ } // for: detectors
// The next set of s-digits
mergeSDigitsManager = (AliTRDdigitsManager *)
fSDigitsManagerList->After(mergeSDigitsManager);
+ } // while: mergeDigitsManagers
+
+ return kTRUE;
+
+}
+
+//_____________________________________________________________________________
+Bool_t AliTRDdigitizer::ConvertSDigits()
+{
+ //
+ // Converts s-digits to normal digits
+ //
+
+ AliTRDdataArrayF *digitsIn = 0x0;
+
+ if (!fSDigitsManager->HasSDigits()) {
+ AliError("No s-digits in digits manager");
+ return kFALSE;
}
+ // Loop through the detectors
+ for (Int_t det = 0; det < AliTRDgeometry::Ndet(); det++) {
+
+ // Get the merged s-digits (signals)
+ digitsIn = (AliTRDdataArrayF *) fSDigitsManager->GetDigits(det);
+ if (!digitsIn->HasData()) {
+ AliDebug(2,Form("No digits for det=%d",det));
+ continue;
+ }
+
+ // Convert the merged sdigits to digits
+ if (!Signal2ADC(det,digitsIn)) {
+ continue;
+ }
+
+ // Copy the dictionary information to the output array
+ if (!CopyDictionary(det)) {
+ continue;
+ }
+
+ // Delete
+ fSDigitsManager->RemoveDigits(det);
+ fSDigitsManager->RemoveDictionaries(det);
+
+ // Compress the arrays
+ CompressOutputArrays(det);
+
+ } // for: detector numbers
+
return kTRUE;
}
//_____________________________________________________________________________
-Bool_t AliTRDdigitizer::SDigits2Digits()
+Bool_t AliTRDdigitizer::CopyDictionary(Int_t det)
{
//
- // Merges the input s-digits and converts them to normal digits
+ // Copies the dictionary information from the s-digits arrays
+ // to the output arrays
//
- if (!MergeSDigits()) {
+ AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
+ if (!calibration) {
+ AliFatal("Could not get calibration object");
return kFALSE;
}
- return ConvertSDigits();
+ AliDebug(1,Form("Start copying dictionaries for detector=%d",det));
+
+ const Int_t kNDict = AliTRDdigitsManager::kNDict;
+ AliTRDdataArrayI *dictionaryIn[kNDict];
+ AliTRDdataArrayI *dictionaryOut[kNDict];
+
+ Int_t nRowMax = fGeo->GetPadPlane(det)->GetNrows();
+ Int_t nColMax = fGeo->GetPadPlane(det)->GetNcols();
+ Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
+
+ Int_t row = 0;
+ Int_t col = 0;
+ Int_t time = 0;
+ Int_t dict = 0;
+
+ for (dict = 0; dict < kNDict; dict++) {
+
+ dictionaryIn[dict] = (AliTRDdataArrayI *) fSDigitsManager->GetDictionary(det,dict);
+ dictionaryIn[dict]->Expand();
+ dictionaryOut[dict] = (AliTRDdataArrayI *) fDigitsManager->GetDictionary(det,dict);
+ dictionaryOut[dict]->Allocate(nRowMax,nColMax,nTimeTotal);
+
+ for (row = 0; row < nRowMax; row++) {
+ for (col = 0; col < nColMax; col++) {
+ for (time = 0; time < nTimeTotal; time++) {
+
+ Int_t track = dictionaryIn[dict]->GetDataUnchecked(row,col,time);
+ dictionaryOut[dict]->SetDataUnchecked(row,col,time,track);
+
+ } // for: time
+ } // for: col
+ } // for: row
+
+ } // for: dictionaries
+
+ return kTRUE;
+
+}
+
+//_____________________________________________________________________________
+void AliTRDdigitizer::CompressOutputArrays(Int_t det)
+{
+ //
+ // Compress the output arrays
+ //
+
+ const Int_t kNDict = AliTRDdigitsManager::kNDict;
+
+ AliTRDdataArrayS *digits = 0x0;
+ AliTRDdataArrayI *dictionary = 0x0;
+
+ if (fCompress) {
+
+ digits = (AliTRDdataArrayS *) fDigitsManager->GetDigits(det);
+ digits->Compress(1,0);
+ for (Int_t dict = 0; dict < kNDict; dict++) {
+ dictionary = (AliTRDdataArrayI *) fDigitsManager->GetDictionary(det,dict);
+ dictionary->Compress(1,0);
+
+ }
+
+ }
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff