+++ /dev/null
-/**************************************************************************
- * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
- * *
- * Author: The ALICE Off-line Project. *
- * Contributors are mentioned in the code where appropriate. *
- * *
- * Permission to use, copy, modify and distribute this software and its *
- * documentation strictly for non-commercial purposes is hereby granted *
- * without fee, provided that the above copyright notice appears in all *
- * copies and that both the copyright notice and this permission notice *
- * appear in the supporting documentation. The authors make no claims *
- * about the suitability of this software for any purpose. It is *
- * provided "as is" without express or implied warranty. *
- **************************************************************************/
-
-/* $Id$ */
-
-///////////////////////////////////////////////////////////////////////////////
-// //
-// TRD cluster finder //
-// //
-///////////////////////////////////////////////////////////////////////////////
-
-#include <TF1.h>
-#include <TTree.h>
-#include <TH1.h>
-#include <TFile.h>
-
-#include "AliRunLoader.h"
-#include "AliLoader.h"
-#include "AliRawReader.h"
-#include "AliLog.h"
-#include "AliAlignObj.h"
-
-#include "AliTRDclusterizerV1.h"
-#include "AliTRDgeometry.h"
-#include "AliTRDdataArrayF.h"
-#include "AliTRDdataArrayI.h"
-#include "AliTRDdigitsManager.h"
-#include "AliTRDpadPlane.h"
-#include "AliTRDrawData.h"
-#include "AliTRDcalibDB.h"
-#include "AliTRDSimParam.h"
-#include "AliTRDRecParam.h"
-#include "AliTRDcluster.h"
-
-#include "Cal/AliTRDCalROC.h"
-#include "Cal/AliTRDCalDet.h"
-
-ClassImp(AliTRDclusterizerV1)
-
-//_____________________________________________________________________________
-AliTRDclusterizerV1::AliTRDclusterizerV1()
- :AliTRDclusterizer()
- ,fDigitsManager(NULL)
-{
- //
- // AliTRDclusterizerV1 default constructor
- //
-
-}
-
-//_____________________________________________________________________________
-AliTRDclusterizerV1::AliTRDclusterizerV1(const Text_t *name, const Text_t *title)
- :AliTRDclusterizer(name,title)
- ,fDigitsManager(new AliTRDdigitsManager())
-{
- //
- // AliTRDclusterizerV1 constructor
- //
-
- fDigitsManager->CreateArrays();
-
-}
-
-//_____________________________________________________________________________
-AliTRDclusterizerV1::AliTRDclusterizerV1(const AliTRDclusterizerV1 &c)
- :AliTRDclusterizer(c)
- ,fDigitsManager(NULL)
-{
- //
- // AliTRDclusterizerV1 copy constructor
- //
-
-}
-
-//_____________________________________________________________________________
-AliTRDclusterizerV1::~AliTRDclusterizerV1()
-{
- //
- // AliTRDclusterizerV1 destructor
- //
-
- if (fDigitsManager) {
- delete fDigitsManager;
- fDigitsManager = NULL;
- }
-
-}
-
-//_____________________________________________________________________________
-AliTRDclusterizerV1 &AliTRDclusterizerV1::operator=(const AliTRDclusterizerV1 &c)
-{
- //
- // Assignment operator
- //
-
- if (this != &c) ((AliTRDclusterizerV1 &) c).Copy(*this);
- return *this;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDclusterizerV1::Copy(TObject &c) const
-{
- //
- // Copy function
- //
-
- ((AliTRDclusterizerV1 &) c).fDigitsManager = 0;
-
- AliTRDclusterizer::Copy(c);
-
-}
-
-//_____________________________________________________________________________
-Bool_t AliTRDclusterizerV1::ReadDigits()
-{
- //
- // Reads the digits arrays from the input aliroot file
- //
-
- if (!fRunLoader) {
- AliError("No run loader available");
- return kFALSE;
- }
-
- AliLoader* loader = fRunLoader->GetLoader("TRDLoader");
- if (!loader->TreeD()) {
- loader->LoadDigits();
- }
-
- // Read in the digit arrays
- return (fDigitsManager->ReadDigits(loader->TreeD()));
-
-}
-
-//_____________________________________________________________________________
-Bool_t AliTRDclusterizerV1::ReadDigits(TTree *digitsTree)
-{
- //
- // Reads the digits arrays from the input tree
- //
-
- // Read in the digit arrays
- return (fDigitsManager->ReadDigits(digitsTree));
-
-}
-
-//_____________________________________________________________________________
-Bool_t AliTRDclusterizerV1::ReadDigits(AliRawReader *rawReader)
-{
- //
- // Reads the digits arrays from the ddl file
- //
-
- AliTRDrawData raw;
- fDigitsManager = raw.Raw2Digits(rawReader);
-
- return kTRUE;
-
-}
-
-//_____________________________________________________________________________
-Bool_t AliTRDclusterizerV1::MakeClusters()
-{
- //
- // Generates the cluster.
- //
-
- Int_t row = 0;
- Int_t col = 0;
- Int_t time = 0;
- Int_t icham = 0;
- Int_t iplan = 0;
- Int_t isect = 0;
- Int_t iPad = 0;
-
- AliTRDdataArrayI *digitsIn;
- AliTRDdataArrayI *tracksIn;
-
- AliTRDgeometry geo;
-
- AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
- if (!calibration) {
- AliFatal("No AliTRDcalibDB instance available\n");
- return kFALSE;
- }
-
- AliTRDSimParam *simParam = AliTRDSimParam::Instance();
- if (!simParam) {
- AliError("No AliTRDSimParam instance available\n");
- return kFALSE;
- }
-
- AliTRDRecParam *recParam = AliTRDRecParam::Instance();
- if (!recParam) {
- AliError("No AliTRDRecParam instance available\n");
- return kFALSE;
- }
-
- // ADC thresholds
- // Float_t ADCthreshold = simParam->GetADCthreshold();
- Float_t ADCthreshold = 0;
- // Threshold value for the maximum
- Float_t maxThresh = recParam->GetClusMaxThresh();
- // Threshold value for the digit signal
- Float_t sigThresh = recParam->GetClusSigThresh();
-
- // Detector wise calibration object for t0
- const AliTRDCalDet *calT0Det = calibration->GetT0Det();
- // Detector wise calibration object for the gain factors
- const AliTRDCalDet *calGainFactorDet = calibration->GetGainFactorDet();
-
- // Iteration limit for unfolding procedure
- const Float_t kEpsilon = 0.01;
- const Int_t kNclus = 3;
- const Int_t kNsig = 5;
- const Int_t kNdict = AliTRDdigitsManager::kNDict;
- const Int_t kNtrack = kNdict * kNclus;
-
- Int_t iUnfold = 0;
- Double_t ratioLeft = 1.0;
- Double_t ratioRight = 1.0;
-
- Int_t iClusterROC = 0;
-
- Double_t padSignal[kNsig];
- Double_t clusterSignal[kNclus];
- Double_t clusterPads[kNclus];
-
- Int_t chamBeg = 0;
- Int_t chamEnd = AliTRDgeometry::Ncham();
- Int_t planBeg = 0;
- Int_t planEnd = AliTRDgeometry::Nplan();
- Int_t sectBeg = 0;
- Int_t sectEnd = AliTRDgeometry::Nsect();
- Int_t nTimeTotal = calibration->GetNumberOfTimeBins();
-
- AliDebug(1,Form("Number of Time Bins = %d.\n",nTimeTotal));
-
- // Start clustering in every chamber
- for (icham = chamBeg; icham < chamEnd; icham++) {
- for (iplan = planBeg; iplan < planEnd; iplan++) {
- for (isect = sectBeg; isect < sectEnd; isect++) {
-
- Int_t idet = geo.GetDetector(iplan,icham,isect);
- Int_t ilayer = AliGeomManager::kTRD1 + iplan;
- Int_t imodule = icham + chamEnd * isect;
- UShort_t volid = AliGeomManager::LayerToVolUID(ilayer,imodule);
-
- // Get the digits
- digitsIn = fDigitsManager->GetDigits(idet);
- // This is to take care of switched off super modules
- if (digitsIn->GetNtime() == 0) {
- continue;
- }
- digitsIn->Expand();
- AliTRDdataArrayI *tracksTmp = fDigitsManager->GetDictionary(idet,0);
- tracksTmp->Expand();
-
- Int_t nRowMax = geo.GetRowMax(iplan,icham,isect);
- Int_t nColMax = geo.GetColMax(iplan);
-
- AliTRDpadPlane *padPlane = geo.GetPadPlane(iplan,icham);
-
- // Calibration object with pad wise values for t0
- AliTRDCalROC *calT0ROC = calibration->GetT0ROC(idet);
- // Calibration object with pad wise values for the gain factors
- AliTRDCalROC *calGainFactorROC = calibration->GetGainFactorROC(idet);
- // Calibration value for chamber wise t0
- Float_t calT0DetValue = calT0Det->GetValue(idet);
- // Calibration value for chamber wise gain factor
- Float_t calGainFactorDetValue = calGainFactorDet->GetValue(idet);
-
- Int_t nClusters = 0;
-
- // Apply the gain and the tail cancelation via digital filter
- AliTRDdataArrayF *digitsOut = new AliTRDdataArrayF(digitsIn->GetNrow()
- ,digitsIn->GetNcol()
- ,digitsIn->GetNtime());
- Transform(digitsIn
- ,digitsOut
- ,nRowMax,nColMax,nTimeTotal
- ,ADCthreshold
- ,calGainFactorROC
- ,calGainFactorDetValue);
-
- // Input digits are not needed any more
- digitsIn->Compress(1,0);
-
- // Loop through the chamber and find the maxima
- for ( row = 0; row < nRowMax; row++) {
- for ( col = 2; col < nColMax; col++) {
- for (time = 0; time < nTimeTotal; time++) {
-
- Float_t signalM = TMath::Abs(digitsOut->GetDataUnchecked(row,col-1,time));
-
- // Look for the maximum
- if (signalM >= maxThresh) {
-
- Float_t signalL = TMath::Abs(digitsOut->GetDataUnchecked(row,col ,time));
- Float_t signalR = TMath::Abs(digitsOut->GetDataUnchecked(row,col-2,time));
-
- if ((TMath::Abs(signalL) <= signalM) &&
- (TMath::Abs(signalR) < signalM)) {
- if ((TMath::Abs(signalL) >= sigThresh) ||
- (TMath::Abs(signalR) >= sigThresh)) {
- // Maximum found, mark the position by a negative signal
- digitsOut->SetDataUnchecked(row,col-1,time,-signalM);
- }
- }
-
- }
-
- }
- }
- }
- tracksTmp->Compress(1,0);
-
- // The index to the first cluster of a given ROC
- Int_t firstClusterROC = -1;
- // The number of cluster in a given ROC
- Int_t nClusterROC = 0;
-
- // Now check the maxima and calculate the cluster position
- for ( row = 0; row < nRowMax ; row++) {
- for (time = 0; time < nTimeTotal; time++) {
- for ( col = 1; col < nColMax-1; col++) {
-
- // Maximum found ?
- if (digitsOut->GetDataUnchecked(row,col,time) < 0.0) {
-
- for (iPad = 0; iPad < kNclus; iPad++) {
- Int_t iPadCol = col - 1 + iPad;
- clusterSignal[iPad] =
- TMath::Abs(digitsOut->GetDataUnchecked(row,iPadCol,time));
- }
-
- // Count the number of pads in the cluster
- Int_t nPadCount = 0;
- Int_t ii;
- // Look to the left
- ii = 0;
- while (TMath::Abs(digitsOut->GetDataUnchecked(row,col-ii ,time)) >= sigThresh) {
- nPadCount++;
- ii++;
- if (col-ii < 0) break;
- }
- // Look to the right
- ii = 0;
- while (TMath::Abs(digitsOut->GetDataUnchecked(row,col+ii+1,time)) >= sigThresh) {
- nPadCount++;
- ii++;
- if (col+ii+1 >= nColMax) break;
- }
- nClusters++;
-
- // Look for 5 pad cluster with minimum in the middle
- Bool_t fivePadCluster = kFALSE;
- if (col < (nColMax - 3)) {
- if (digitsOut->GetDataUnchecked(row,col+2,time) < 0) {
- fivePadCluster = kTRUE;
- }
- if ((fivePadCluster) && (col < (nColMax - 5))) {
- if (digitsOut->GetDataUnchecked(row,col+4,time) >= sigThresh) {
- fivePadCluster = kFALSE;
- }
- }
- if ((fivePadCluster) && (col > 1)) {
- if (digitsOut->GetDataUnchecked(row,col-2,time) >= sigThresh) {
- fivePadCluster = kFALSE;
- }
- }
- }
-
- // 5 pad cluster
- // Modify the signal of the overlapping pad for the left part
- // of the cluster which remains from a previous unfolding
- if (iUnfold) {
- clusterSignal[0] *= ratioLeft;
- iUnfold = 0;
- }
-
- // Unfold the 5 pad cluster
- if (fivePadCluster) {
- for (iPad = 0; iPad < kNsig; iPad++) {
- padSignal[iPad] = TMath::Abs(digitsOut->GetDataUnchecked(row
- ,col-1+iPad
- ,time));
- }
- // Unfold the two maxima and set the signal on
- // the overlapping pad to the ratio
- ratioRight = Unfold(kEpsilon,iplan,padSignal);
- ratioLeft = 1.0 - ratioRight;
- clusterSignal[2] *= ratioRight;
- iUnfold = 1;
- }
-
- Double_t clusterCharge = clusterSignal[0]
- + clusterSignal[1]
- + clusterSignal[2];
-
- // The position of the cluster
- clusterPads[0] = row + 0.5;
- // Take the shift of the additional time bins into account
- clusterPads[2] = time + 0.5;
-
- if (recParam->LUTOn()) {
- // Calculate the position of the cluster by using the
- // lookup table method
- clusterPads[1] = recParam->LUTposition(iplan,clusterSignal[0]
- ,clusterSignal[1]
- ,clusterSignal[2]);
- }
- else {
- // Calculate the position of the cluster by using the
- // center of gravity method
- for (Int_t i = 0; i < kNsig; i++) {
- padSignal[i] = 0.0;
- }
- padSignal[2] = TMath::Abs(digitsOut->GetDataUnchecked(row,col ,time)); // Central pad
- padSignal[1] = TMath::Abs(digitsOut->GetDataUnchecked(row,col-1,time)); // Left pad
- padSignal[3] = TMath::Abs(digitsOut->GetDataUnchecked(row,col+1,time)); // Right pad
- if ((col > 2) &&
- (TMath::Abs(digitsOut->GetDataUnchecked(row,col-2,time)) < padSignal[1])) {
- padSignal[0] = TMath::Abs(digitsOut->GetDataUnchecked(row,col-2,time));
- }
- if ((col < nColMax - 3) &&
- (TMath::Abs(digitsOut->GetDataUnchecked(row,col+2,time)) < padSignal[3])) {
- padSignal[4] = TMath::Abs(digitsOut->GetDataUnchecked(row,col+2,time));
- }
- clusterPads[1] = GetCOG(padSignal);
- }
-
- Double_t q0 = clusterSignal[0];
- Double_t q1 = clusterSignal[1];
- Double_t q2 = clusterSignal[2];
- Double_t clusterSigmaY2 = (q1 * (q0 + q2) + 4.0 * q0 * q2)
- / (clusterCharge*clusterCharge);
-
- //
- // Calculate the position and the error
- //
-
- // Correct for t0 (sum of chamber and pad wise values !!!)
- Float_t calT0ROCValue = calT0ROC->GetValue(col,row);
- Char_t clusterTimeBin = ((Char_t) TMath::Nint(time - (calT0DetValue + calT0ROCValue)));
- Double_t colSize = padPlane->GetColSize(col);
- Double_t rowSize = padPlane->GetRowSize(row);
-
- Float_t clusterPos[3];
- clusterPos[0] = padPlane->GetColPos(col) - (clusterPads[1] + 0.5) * colSize;
- clusterPos[1] = padPlane->GetRowPos(row) - 0.5 * rowSize;
- clusterPos[2] = CalcXposFromTimebin(clusterPads[2],idet,col,row);
- Float_t clusterSig[2];
- clusterSig[0] = (clusterSigmaY2 + 1.0/12.0) * colSize*colSize;
- clusterSig[1] = rowSize * rowSize / 12.0;
-
- // Store the amplitudes of the pads in the cluster for later analysis
- Short_t signals[7] = { 0, 0, 0, 0, 0, 0, 0 };
- for (Int_t jPad = col-3; jPad <= col+3; jPad++) {
- if ((jPad < 0) ||
- (jPad >= nColMax-1)) {
- continue;
- }
- signals[jPad-col+3] = TMath::Nint(TMath::Abs(digitsOut->GetDataUnchecked(row,jPad,time)));
- }
-
- // Add the cluster to the output array
- // The track indices will be stored later
- AliTRDcluster *cluster = new AliTRDcluster(idet
- ,clusterCharge
- ,clusterPos
- ,clusterSig
- ,0x0
- ,((Char_t) nPadCount)
- ,signals
- ,((UChar_t) col)
- ,clusterTimeBin
- ,clusterPads[1]
- ,volid);
- // Temporarily store the row, column and time bin of the center pad
- // Used to later on assign the track indices
- cluster->SetLabel( row,0);
- cluster->SetLabel( col,1);
- cluster->SetLabel(time,2);
- RecPoints()->Add(cluster);
-
- // Store the index of the first cluster in the current ROC
- if (firstClusterROC < 0) {
- firstClusterROC = RecPoints()->GetEntriesFast() - 1;
- }
- // Count the number of cluster in the current ROC
- nClusterROC++;
-
- } // if: Maximum found ?
-
- } // loop: pad columns
- } // loop: time bins
- } // loop: pad rows
-
- delete digitsOut;
-
- //
- // Add the track indices to the found clusters
- //
-
- // Temporary array to collect the track indices
- Int_t *idxTracks = new Int_t[kNtrack*nClusterROC];
-
- // Loop through the dictionary arrays one-by-one
- // to keep memory consumption low
- for (Int_t iDict = 0; iDict < kNdict; iDict++) {
-
- tracksIn = fDigitsManager->GetDictionary(idet,iDict);
- tracksIn->Expand();
-
- // Loop though the clusters found in this ROC
- for (iClusterROC = 0; iClusterROC < nClusterROC; iClusterROC++) {
-
- AliTRDcluster *cluster = (AliTRDcluster *)
- RecPoints()->UncheckedAt(firstClusterROC+iClusterROC);
- row = cluster->GetLabel(0);
- col = cluster->GetLabel(1);
- time = cluster->GetLabel(2);
-
- for (iPad = 0; iPad < kNclus; iPad++) {
- Int_t iPadCol = col - 1 + iPad;
- Int_t index = tracksIn->GetDataUnchecked(row,iPadCol,time) - 1;
- idxTracks[3*iPad+iDict + iClusterROC*kNtrack] = index;
- }
-
- }
-
- // Compress the arrays
- tracksIn->Compress(1,0);
-
- }
-
- // Copy the track indices into the cluster
- // Loop though the clusters found in this ROC
- for (iClusterROC = 0; iClusterROC < nClusterROC; iClusterROC++) {
-
- AliTRDcluster *cluster = (AliTRDcluster *)
- RecPoints()->UncheckedAt(firstClusterROC+iClusterROC);
- cluster->SetLabel(-9999,0);
- cluster->SetLabel(-9999,1);
- cluster->SetLabel(-9999,2);
-
- cluster->AddTrackIndex(&idxTracks[iClusterROC*kNtrack]);
-
- }
-
- delete [] idxTracks;
-
- // Write the cluster and reset the array
- WriteClusters(idet);
- ResetRecPoints();
-
- } // loop: Sectors
- } // loop: Planes
- } // loop: Chambers
-
- return kTRUE;
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDclusterizerV1::GetCOG(Double_t signal[5])
-{
- //
- // Get COG position
- // Used for clusters with more than 3 pads - where LUT not applicable
- //
-
- Double_t sum = signal[0]
- + signal[1]
- + signal[2]
- + signal[3]
- + signal[4];
-
- Double_t res = (0.0 * (-signal[0] + signal[4])
- + (-signal[1] + signal[3])) / sum;
-
- return res;
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDclusterizerV1::Unfold(Double_t eps, Int_t plane, Double_t *padSignal)
-{
- //
- // Method to unfold neighbouring maxima.
- // The charge ratio on the overlapping pad is calculated
- // until there is no more change within the range given by eps.
- // The resulting ratio is then returned to the calling method.
- //
-
- AliTRDcalibDB *calibration = AliTRDcalibDB::Instance();
- if (!calibration) {
- AliError("No AliTRDcalibDB instance available\n");
- return kFALSE;
- }
-
- Int_t irc = 0;
- Int_t itStep = 0; // Count iteration steps
-
- Double_t ratio = 0.5; // Start value for ratio
- Double_t prevRatio = 0.0; // Store previous ratio
-
- Double_t newLeftSignal[3] = { 0.0, 0.0, 0.0 }; // Array to store left cluster signal
- Double_t newRightSignal[3] = { 0.0, 0.0, 0.0 }; // Array to store right cluster signal
- Double_t newSignal[3] = { 0.0, 0.0, 0.0 };
-
- // Start the iteration
- while ((TMath::Abs(prevRatio - ratio) > eps) && (itStep < 10)) {
-
- itStep++;
- prevRatio = ratio;
-
- // Cluster position according to charge ratio
- Double_t maxLeft = (ratio*padSignal[2] - padSignal[0])
- / (padSignal[0] + padSignal[1] + ratio*padSignal[2]);
- Double_t maxRight = (padSignal[4] - (1-ratio)*padSignal[2])
- / ((1.0 - ratio)*padSignal[2] + padSignal[3] + padSignal[4]);
-
- // Set cluster charge ratio
- irc = calibration->PadResponse(1.0,maxLeft ,plane,newSignal);
- Double_t ampLeft = padSignal[1] / newSignal[1];
- irc = calibration->PadResponse(1.0,maxRight,plane,newSignal);
- Double_t ampRight = padSignal[3] / newSignal[1];
-
- // Apply pad response to parameters
- irc = calibration->PadResponse(ampLeft ,maxLeft ,plane,newLeftSignal );
- irc = calibration->PadResponse(ampRight,maxRight,plane,newRightSignal);
-
- // Calculate new overlapping ratio
- ratio = TMath::Min((Double_t)1.0,newLeftSignal[2] /
- (newLeftSignal[2] + newRightSignal[0]));
-
- }
-
- return ratio;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDclusterizerV1::Transform(AliTRDdataArrayI *digitsIn
- , AliTRDdataArrayF *digitsOut
- , Int_t nRowMax, Int_t nColMax, Int_t nTimeTotal
- , Float_t ADCthreshold
- , AliTRDCalROC *calGainFactorROC
- , Float_t calGainFactorDetValue)
-{
- //
- // Apply gain factor
- // Apply tail cancelation: Transform digitsIn to digitsOut
- //
-
- Int_t iRow = 0;
- Int_t iCol = 0;
- Int_t iTime = 0;
-
- AliTRDRecParam *recParam = AliTRDRecParam::Instance();
- if (!recParam) {
- AliError("No AliTRDRecParam instance available\n");
- return;
- }
-
- Double_t *inADC = new Double_t[nTimeTotal]; // ADC data before tail cancellation
- Double_t *outADC = new Double_t[nTimeTotal]; // ADC data after tail cancellation
-
- for (iRow = 0; iRow < nRowMax; iRow++ ) {
- for (iCol = 0; iCol < nColMax; iCol++ ) {
-
- Float_t calGainFactorROCValue = calGainFactorROC->GetValue(iCol,iRow);
- Double_t gain = calGainFactorDetValue
- * calGainFactorROCValue;
-
- for (iTime = 0; iTime < nTimeTotal; iTime++) {
-
- //
- // Add gain
- //
- inADC[iTime] = digitsIn->GetDataUnchecked(iRow,iCol,iTime);
- inADC[iTime] /= gain;
- outADC[iTime] = inADC[iTime];
-
- }
-
- // Apply the tail cancelation via the digital filter
- if (recParam->TCOn()) {
- DeConvExp(inADC,outADC,nTimeTotal,recParam->GetTCnexp());
- }
-
- for (iTime = 0; iTime < nTimeTotal; iTime++) {
-
- // Store the amplitude of the digit if above threshold
- if (outADC[iTime] > ADCthreshold) {
- digitsOut->SetDataUnchecked(iRow,iCol,iTime,outADC[iTime]);
- }
-
- }
-
- }
- }
-
- delete [] inADC;
- delete [] outADC;
-
- return;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDclusterizerV1::DeConvExp(Double_t *source, Double_t *target
- , Int_t n, Int_t nexp)
-{
- //
- // Tail cancellation by deconvolution for PASA v4 TRF
- //
-
- Double_t rates[2];
- Double_t coefficients[2];
-
- // Initialization (coefficient = alpha, rates = lambda)
- Double_t R1 = 1.0;
- Double_t R2 = 1.0;
- Double_t C1 = 0.5;
- Double_t C2 = 0.5;
-
- if (nexp == 1) { // 1 Exponentials
- R1 = 1.156;
- R2 = 0.130;
- C1 = 0.066;
- C2 = 0.000;
- }
- if (nexp == 2) { // 2 Exponentials
- R1 = 1.156;
- R2 = 0.130;
- C1 = 0.114;
- C2 = 0.624;
- }
-
- coefficients[0] = C1;
- coefficients[1] = C2;
-
- Double_t Dt = 0.1;
-
- rates[0] = TMath::Exp(-Dt/(R1));
- rates[1] = TMath::Exp(-Dt/(R2));
-
- Int_t i = 0;
- Int_t k = 0;
-
- Double_t reminder[2];
- Double_t correction;
- Double_t result;
-
- // Attention: computation order is important
- correction = 0.0;
- for (k = 0; k < nexp; k++) {
- reminder[k] = 0.0;
- }
- for (i = 0; i < n; i++) {
- result = (source[i] - correction); // No rescaling
- target[i] = result;
-
- for (k = 0; k < nexp; k++) {
- reminder[k] = rates[k] * (reminder[k] + coefficients[k] * result);
- }
- correction = 0.0;
- for (k = 0; k < nexp; k++) {
- correction += reminder[k];
- }
- }
-
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff