**************************************************************************/
/* $Id$ */
-/* History of cvs commits:
- *
- * $Log$
- * Revision 1.4 2007/10/31 17:15:24 mvl
- * Fixed bug in raw data unpacking; Added pedestal to signal fit; Added logic to deal with high/low gain
- *
- * Revision 1.3 2007/09/27 08:36:46 mvl
- * More robust setting of fit range in FitRawSignal (P. Hristov)
- *
- * Revision 1.2 2007/09/03 20:55:35 jklay
- * EMCAL e-by-e reconstruction methods from Cvetan
- *
- * Revision 1.1 2007/03/17 19:56:38 mvl
- * Moved signal shape routines from AliEMCAL to separate class AliEMCALRawUtils to streamline raw data reconstruction code.
- * */
+//_________________________________________________________________________
+// Utility Class for handling Raw data
+// Does all transitions from Digits to Raw and vice versa,
+// for simu and reconstruction
+//
+// Note: the current version is still simplified. Only
+// one raw signal per digit is generated; either high-gain or low-gain
+// Need to add concurrent high and low-gain info in the future
+// No pedestal is added to the raw signal.
//*-- Author: Marco van Leeuwen (LBL)
-#include "AliEMCALRawUtils.h"
+#include "AliEMCALRawUtils.h"
+
#include "TF1.h"
#include "TGraph.h"
-#include "TSystem.h"
-
-#include "AliLog.h"
+class TSystem;
+
+class AliLog;
+#include "AliRun.h"
#include "AliRunLoader.h"
-#include "AliCaloAltroMapping.h"
+class AliCaloAltroMapping;
#include "AliAltroBuffer.h"
#include "AliRawReader.h"
-#include "AliCaloRawStream.h"
+#include "AliCaloRawStreamV3.h"
#include "AliDAQ.h"
-
+
+#include "AliEMCALRecParam.h"
#include "AliEMCALLoader.h"
#include "AliEMCALGeometry.h"
-#include "AliEMCALDigitizer.h"
+class AliEMCALDigitizer;
#include "AliEMCALDigit.h"
-
-
+#include "AliEMCAL.h"
+
ClassImp(AliEMCALRawUtils)
-
+
// Signal shape parameters
-Int_t AliEMCALRawUtils::fgOrder = 2 ; // Order of gamma function
Double_t AliEMCALRawUtils::fgTimeBinWidth = 100E-9 ; // each sample is 100 ns
-Double_t AliEMCALRawUtils::fgTau = 235E-9 ; // 235 ns (from CERN testbeam; not very accurate)
Double_t AliEMCALRawUtils::fgTimeTrigger = 1.5E-6 ; // 15 time bins ~ 1.5 musec
// some digitization constants
Int_t AliEMCALRawUtils::fgThreshold = 1;
Int_t AliEMCALRawUtils::fgDDLPerSuperModule = 2; // 2 ddls per SuperModule
+Int_t AliEMCALRawUtils::fgPedestalValue = 32; // pedestal value for digits2raw
+Double_t AliEMCALRawUtils::fgFEENoise = 3.; // 3 ADC channels of noise (sampled)
+
+AliEMCALRawUtils::AliEMCALRawUtils()
+ : fHighLowGainFactor(0.), fOrder(0), fTau(0.), fNoiseThreshold(0),
+ fNPedSamples(0), fGeom(0), fOption("")
+{
-AliEMCALRawUtils::AliEMCALRawUtils(): fHighLowGainFactor(0.) {
+ //These are default parameters.
+ //Can be re-set from without with setter functions
fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits)
+ fOrder = 2; // order of gamma fn
+ fTau = 2.35; // in units of timebin, from CERN 2007 testbeam
+ fNoiseThreshold = 3;
+ fNPedSamples = 5;
+
+ //Get Mapping RCU files from the AliEMCALRecParam
+ const TObjArray* maps = AliEMCALRecParam::GetMappings();
+ if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!");
+
+ for(Int_t i = 0; i < 4; i++) {
+ fMapping[i] = (AliAltroMapping*)maps->At(i);
+ }
+
+ //To make sure we match with the geometry in a simulation file,
+ //let's try to get it first. If not, take the default geometry
+ AliRunLoader *rl = AliRunLoader::Instance();
+ if(!rl) AliError("Cannot find RunLoader!");
+ if (rl->GetAliRun() && rl->GetAliRun()->GetDetector("EMCAL")) {
+ fGeom = dynamic_cast<AliEMCAL*>(rl->GetAliRun()->GetDetector("EMCAL"))->GetGeometry();
+ } else {
+ AliInfo(Form("Using default geometry in raw reco"));
+ fGeom = AliEMCALGeometry::GetInstance(AliEMCALGeometry::GetDefaultGeometryName());
+ }
+
+ if(!fGeom) AliFatal(Form("Could not get geometry!"));
+
+}
+
+//____________________________________________________________________________
+AliEMCALRawUtils::AliEMCALRawUtils(AliEMCALGeometry *pGeometry)
+ : fHighLowGainFactor(0.), fOrder(0), fTau(0.), fNoiseThreshold(0),
+ fNPedSamples(0), fGeom(pGeometry), fOption("")
+{
+ //
+ // Initialize with the given geometry - constructor required by HLT
+ // HLT does not use/support AliRunLoader(s) instances
+ // This is a minimum intervention solution
+ // Comment by MPloskon@lbl.gov
+ //
+
+ //These are default parameters.
+ //Can be re-set from without with setter functions
+ fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits)
+ fOrder = 2; // order of gamma fn
+ fTau = 2.35; // in units of timebin, from CERN 2007 testbeam
+ fNoiseThreshold = 3;
+ fNPedSamples = 5;
+
+ //Get Mapping RCU files from the AliEMCALRecParam
+ const TObjArray* maps = AliEMCALRecParam::GetMappings();
+ if(!maps) AliFatal("Cannot retrieve ALTRO mappings!!");
+
+ for(Int_t i = 0; i < 4; i++) {
+ fMapping[i] = (AliAltroMapping*)maps->At(i);
+ }
+
+ if(!fGeom) AliFatal(Form("Could not get geometry!"));
+
+}
+
+//____________________________________________________________________________
+AliEMCALRawUtils::AliEMCALRawUtils(const AliEMCALRawUtils& rawU)
+ : TObject(),
+ fHighLowGainFactor(rawU.fHighLowGainFactor),
+ fOrder(rawU.fOrder),
+ fTau(rawU.fTau),
+ fNoiseThreshold(rawU.fNoiseThreshold),
+ fNPedSamples(rawU.fNPedSamples),
+ fGeom(rawU.fGeom),
+ fOption(rawU.fOption)
+{
+ //copy ctor
+ fMapping[0] = rawU.fMapping[0];
+ fMapping[1] = rawU.fMapping[1];
+ fMapping[2] = rawU.fMapping[2];
+ fMapping[3] = rawU.fMapping[3];
+}
+
+//____________________________________________________________________________
+AliEMCALRawUtils& AliEMCALRawUtils::operator =(const AliEMCALRawUtils &rawU)
+{
+ //assignment operator
+
+ if(this != &rawU) {
+ fHighLowGainFactor = rawU.fHighLowGainFactor;
+ fOrder = rawU.fOrder;
+ fTau = rawU.fTau;
+ fNoiseThreshold = rawU.fNoiseThreshold;
+ fNPedSamples = rawU.fNPedSamples;
+ fGeom = rawU.fGeom;
+ fOption = rawU.fOption;
+ fMapping[0] = rawU.fMapping[0];
+ fMapping[1] = rawU.fMapping[1];
+ fMapping[2] = rawU.fMapping[2];
+ fMapping[3] = rawU.fMapping[3];
+ }
+
+ return *this;
+
}
+
//____________________________________________________________________________
AliEMCALRawUtils::~AliEMCALRawUtils() {
+ //dtor
+
}
+
//____________________________________________________________________________
void AliEMCALRawUtils::Digits2Raw()
{
// convert digits of the current event to raw data
- AliRunLoader *rl = AliRunLoader::GetRunLoader();
+ AliRunLoader *rl = AliRunLoader::Instance();
AliEMCALLoader *loader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
// get the digits
Warning("Digits2Raw", "no digits found !");
return;
}
-
- // get the geometry
- AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance();
- if (!geom) {
- AliError(Form("No geometry found !"));
- return;
- }
-
+
static const Int_t nDDL = 12*2; // 12 SM hardcoded for now. Buffers allocated dynamically, when needed, so just need an upper limit here
AliAltroBuffer* buffers[nDDL];
for (Int_t i=0; i < nDDL; i++)
Int_t adcValuesLow[fgkTimeBins];
Int_t adcValuesHigh[fgkTimeBins];
- //Load Mapping RCU files once
- TString path = gSystem->Getenv("ALICE_ROOT");
- path += "/EMCAL/mapping/RCU";
- TString path0 = path+"0.data";//This file will change in future
- TString path1 = path+"1.data";//This file will change in future
- AliAltroMapping * mapping[2] ; // For the moment only 2
- mapping[0] = new AliCaloAltroMapping(path0.Data());
- mapping[1] = new AliCaloAltroMapping(path1.Data());
-
// loop over digits (assume ordered digits)
for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
AliEMCALDigit* digit = dynamic_cast<AliEMCALDigit *>(digits->At(iDigit)) ;
Int_t iphi = 0;
Int_t ieta = 0;
Int_t nModule = 0;
- geom->GetCellIndex(digit->GetId(), nSM, nModule, nIphi, nIeta);
- geom->GetCellPhiEtaIndexInSModule(nSM, nModule, nIphi, nIeta,iphi, ieta) ;
+ fGeom->GetCellIndex(digit->GetId(), nSM, nModule, nIphi, nIeta);
+ fGeom->GetCellPhiEtaIndexInSModule(nSM, nModule, nIphi, nIeta,iphi, ieta) ;
- //Check which is the RCU of the cell.
+ //Check which is the RCU, 0 or 1, of the cell.
Int_t iRCU = -111;
//RCU0
if (0<=iphi&&iphi<8) iRCU=0; // first cable row
else if(8<=iphi&&iphi<16 && 24<=ieta&&ieta<48) iRCU=1; // second half;
//second cable row
else if(16<=iphi&&iphi<24) iRCU=1; // third cable row
+
+ if (nSM%2==1) iRCU = 1 - iRCU; // swap for odd=C side, to allow us to cable both sides the same
+
+ if (iRCU<0)
+ Fatal("Digits2Raw()","Non-existent RCU number: %d", iRCU);
//Which DDL?
Int_t iDDL = fgDDLPerSuperModule* nSM + iRCU;
if (buffers[iDDL] == 0) {
// open new file and write dummy header
TString fileName = AliDAQ::DdlFileName("EMCAL",iDDL);
- buffers[iDDL] = new AliAltroBuffer(fileName.Data(),mapping[iRCU]);
+ //Select mapping file RCU0A, RCU0C, RCU1A, RCU1C
+ Int_t iRCUside=iRCU+(nSM%2)*2;
+ //iRCU=0 and even (0) SM -> RCU0A.data 0
+ //iRCU=1 and even (0) SM -> RCU1A.data 1
+ //iRCU=0 and odd (1) SM -> RCU0C.data 2
+ //iRCU=1 and odd (1) SM -> RCU1C.data 3
+ //cout<<" nSM "<<nSM<<"; iRCU "<<iRCU<<"; iRCUside "<<iRCUside<<endl;
+ buffers[iDDL] = new AliAltroBuffer(fileName.Data(),fMapping[iRCUside]);
buffers[iDDL]->WriteDataHeader(kTRUE, kFALSE); //Dummy;
}
delete buffers[i];
}
}
- mapping[0]->Delete();
- mapping[1]->Delete();
+
loader->UnloadDigits();
}
//____________________________________________________________________________
void AliEMCALRawUtils::Raw2Digits(AliRawReader* reader,TClonesArray *digitsArr)
{
- // convert raw data of the current event to digits
- AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
- if (!geom) {
- AliError(Form("No geometry found !"));
- return;
- }
+ // convert raw data of the current event to digits
digitsArr->Clear();
return;
}
- // Use AliAltroRawStream to read the ALTRO format. No need to
- // reinvent the wheel :-)
- AliCaloRawStream in(reader,"EMCAL");
+ AliCaloRawStreamV3 in(reader,"EMCAL",fMapping);
// Select EMCAL DDL's;
reader->Select("EMCAL");
- in.SetOldRCUFormat(kTRUE); // Needed for testbeam data
-
- cout << "Stream set up" << endl;
- // reading is from previously existing AliEMCALGetter.cxx
- // ReadRaw method
- TF1 * signalF = new TF1("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
+ //Updated fitting routine from 2007 beam test takes into account
+ //possibility of two peaks in data and selects first one for fitting
+ //Also sets some of the starting parameters based on the shape of the
+ //given raw signal being fit
+
+ TF1 * signalF = new TF1("signal", RawResponseFunction, 0, GetRawFormatTimeBins(), 5);
+ signalF->SetParameters(10.,0.,fTau,fOrder,5.); //set all defaults once, just to be safe
+ signalF->SetParNames("amp","t0","tau","N","ped");
+ signalF->SetParameter(2,fTau); // tau in units of time bin
+ signalF->SetParLimits(2,2,-1);
+ signalF->SetParameter(3,fOrder); // order
+ signalF->SetParLimits(3,2,-1);
Int_t id = -1;
Float_t time = 0. ;
Float_t amp = 0. ;
+ Int_t i = 0;
+ Int_t startBin = 0;
- TGraph * gSig = new TGraph(GetRawFormatTimeBins()) ;
+ //Graph to hold data we will fit (should be converted to an array
+ //later to speed up processing
+ TGraph * gSig = new TGraph(GetRawFormatTimeBins());
- Int_t readOk = 1;
Int_t lowGain = 0;
-
- while (readOk && in.GetModule() < 0)
- readOk = in.Next(); // Go to first digit
-
- while (readOk) {
- id = geom->GetAbsCellIdFromCellIndexes(in.GetModule(), in.GetRow(), in.GetColumn()) ;
- lowGain = in.IsLowGain();
- Int_t maxTime = in.GetTime(); // timebins come in reverse order
- if (maxTime < 0 || maxTime >= GetRawFormatTimeBins()) {
- AliWarning(Form("Invalid time bin %d",maxTime));
- maxTime = GetRawFormatTimeBins();
- }
- gSig->Set(maxTime+1);
- // There is some kind of zero-suppression in the raw data,
- // so set up the TGraph in advance
- for (Int_t i=0; i < maxTime; i++) {
- gSig->SetPoint(i, i * GetRawFormatTimeBinWidth(), 0);
- }
-
- Int_t iTime = 0;
- do {
- if (in.GetTime() >= gSig->GetN()) {
- AliWarning("Too many time bins");
- gSig->Set(in.GetTime());
+ Int_t caloFlag = 0; // low, high gain, or TRU, or LED ref.
+
+ // start loop over input stream
+ while (in.NextDDL()) {
+ while (in.NextChannel()) {
+
+ id = fGeom->GetAbsCellIdFromCellIndexes(in.GetModule(), in.GetRow(), in.GetColumn()) ;
+ caloFlag = in.GetCaloFlag();
+ lowGain = in.IsLowGain();
+
+ // There can be zero-suppression in the raw data,
+ // so set up the TGraph in advance
+ for (i=0; i < GetRawFormatTimeBins(); i++) {
+ gSig->SetPoint(i, i , 0);
}
- gSig->SetPoint(in.GetTime(),
- in.GetTime() * GetRawFormatTimeBinWidth(),
- in.GetSignal()) ;
- if (in.GetTime() > maxTime)
- maxTime = in.GetTime();
- iTime++;
- } while ((readOk = in.Next()) && !in.IsNewHWAddress());
- signalF->SetRange(0,(Float_t)maxTime*GetRawFormatTimeBinWidth());
-
- FitRaw(gSig, signalF, amp, time) ;
+
+ Int_t maxTime = 0;
+
+ while (in.NextBunch()) {
+ const UShort_t *sig = in.GetSignals();
+ startBin = in.GetStartTimeBin();
+
+ if (((UInt_t) maxTime) < in.GetStartTimeBin()) {
+ maxTime = in.GetStartTimeBin(); // timebins come in reverse order
+ }
+
+ if (maxTime < 0 || maxTime >= GetRawFormatTimeBins()) {
+ AliWarning(Form("Invalid time bin %d",maxTime));
+ maxTime = GetRawFormatTimeBins();
+ }
+
+ for (i = 0; i < in.GetBunchLength(); i++) {
+ time = startBin--;
+ gSig->SetPoint(time, time, sig[i]) ;
+ }
+ } // loop over bunches
- if (amp > 0) {
- AliDebug(2,Form("id %d lowGain %d amp %g", id, lowGain, amp));
- AddDigit(digitsArr, id, lowGain, (Int_t)amp, time);
- }
+ gSig->Set(maxTime+1);
+ FitRaw(gSig, signalF, amp, time) ;
+
+ if (caloFlag == 0 || caloFlag == 1) { // low gain or high gain
+ if (amp > 0 && amp < 2000) { //check both high and low end of
+ //result, 2000 is somewhat arbitrary - not nice with magic numbers in the code..
+ AliDebug(2,Form("id %d lowGain %d amp %g", id, lowGain, amp));
- // Reset graph
- for (Int_t index = 0; index < gSig->GetN(); index++) {
- gSig->SetPoint(index, index * GetRawFormatTimeBinWidth(), 0) ;
- }
- }; // EMCAL entries loop
+ AddDigit(digitsArr, id, lowGain, (Int_t)amp, time);
+ }
+
+ }
+
+ // Reset graph
+ for (Int_t index = 0; index < gSig->GetN(); index++) {
+ gSig->SetPoint(index, index, 0) ;
+ }
+ // Reset starting parameters for fit function
+ signalF->SetParameters(10.,0.,fTau,fOrder,5.); //reset all defaults just to be safe
+
+ } // end while over channel
+ } //end while over DDL's, of input stream
delete signalF ;
delete gSig;
new((*digitsArr)[idigit]) AliEMCALDigit( -1, -1, id, amp, time, idigit) ;
}
else { // a digit already exists, check range
- // (use high gain if signal < 800, otherwise low gain)
+ // (use high gain if signal < cut value, otherwise low gain)
if (lowGain) { // new digit is low gain
- if (digit->GetAmp() > 800) { // use if stored digit is out of range
+ if (digit->GetAmp() > fgkOverflowCut) { // use if stored digit is out of range
digit->SetAmp(Int_t(fHighLowGainFactor * amp));
digit->SetTime(time);
}
}
- else if (amp < 800) { // new digit is high gain; use if not out of range
+ else if (amp < fgkOverflowCut) { // new digit is high gain; use if not out of range
digit->SetAmp(amp);
digit->SetTime(time);
}
}
//____________________________________________________________________________
-void AliEMCALRawUtils::FitRaw(TGraph * gSig, TF1* signalF, Float_t & amp, Float_t & time)
+void AliEMCALRawUtils::FitRaw(TGraph * gSig, TF1* signalF, Float_t & amp, Float_t & time) const
{
// Fits the raw signal time distribution; from AliEMCALGetter
- const Int_t kNoiseThreshold = 5;
- const Int_t kNPedSamples = 10;
amp = time = 0. ;
Double_t ped = 0;
Int_t nPed = 0;
- for (Int_t index = 0; index < kNPedSamples; index++) {
+ for (Int_t index = 0; index < fNPedSamples; index++) {
Double_t ttime, signal;
gSig->GetPoint(index, ttime, signal) ;
if (signal > 0) {
if (nPed > 0)
ped /= nPed;
else {
- AliWarning("Could determine pedestal");
+ AliWarning("Could not determine pedestal");
ped = 10; // put some small value as first guess
}
- Int_t max_found = 0;
- Int_t i_max = 0;
+ Int_t maxFound = 0;
+ Int_t iMax = 0;
Float_t max = -1;
- Float_t tmax = 0;
- Float_t max_fit = gSig->GetN()*GetRawFormatTimeBinWidth();
- Float_t min_after_sig = 9999;
- Int_t imin_after_sig = gSig->GetN();
- Float_t tmin_after_sig = gSig->GetN()*GetRawFormatTimeBinWidth();
- Int_t n_ped_after_sig = 0;
-
- for (Int_t i=kNPedSamples; i < gSig->GetN(); i++) {
+ Float_t maxFit = gSig->GetN();
+ Float_t minAfterSig = 9999;
+ Int_t tminAfterSig = gSig->GetN();
+ Int_t nPedAfterSig = 0;
+ Int_t plateauWidth = 0;
+ Int_t plateauStart = 9999;
+ Float_t cut = 0.3;
+
+ for (Int_t i=fNPedSamples; i < gSig->GetN(); i++) {
Double_t ttime, signal;
gSig->GetPoint(i, ttime, signal) ;
- if (!max_found && signal > max) {
- i_max = i;
- tmax = ttime;
+ if (!maxFound && signal > max) {
+ iMax = i;
max = signal;
}
- else if ( max > ped + kNoiseThreshold ) {
- max_found = 1;
- min_after_sig = signal;
- imin_after_sig = i;
- tmin_after_sig = ttime;
+ else if ( max > ped + fNoiseThreshold ) {
+ maxFound = 1;
+ minAfterSig = signal;
+ tminAfterSig = i;
}
- if (max_found) {
- if ( signal < min_after_sig) {
- min_after_sig = signal;
- imin_after_sig = i;
- tmin_after_sig = ttime;
+ if (maxFound) {
+ if ( signal < minAfterSig) {
+ minAfterSig = signal;
+ tminAfterSig = i;
+ }
+ if (i > tminAfterSig + 5) { // Two close peaks; end fit at minimum
+ maxFit = tminAfterSig;
+ break;
}
- if (i > tmin_after_sig + 5) { // Two close peaks; end fit at minimum
- max_fit = tmin_after_sig;
+ if ( signal < cut*max){ //stop fit at 30% amplitude(avoid the pulse shape falling edge)
+ maxFit = i;
break;
}
- if ( signal < ped + kNoiseThreshold)
- n_ped_after_sig++;
- if (n_ped_after_sig >= 5) { // include 5 pedestal bins after peak
- max_fit = ttime;
+ if ( signal < ped + fNoiseThreshold)
+ nPedAfterSig++;
+ if (nPedAfterSig >= 5) { // include 5 pedestal bins after peak
+ maxFit = i;
break;
}
}
+ //Add check on plateau
+ if (signal >= fgkRawSignalOverflow - fNoiseThreshold) {
+ if(plateauWidth == 0) plateauStart = i;
+ plateauWidth++;
+ }
}
- if ( max - ped > kNoiseThreshold ) { // else its noise
+ if(plateauWidth > 0) {
+ for(int j = 0; j < plateauWidth; j++) {
+ //Note, have to remove the same point N times because after each
+ //remove, the positions of all subsequent points have shifted down
+ gSig->RemovePoint(plateauStart);
+ }
+ }
+
+ if ( max - ped > fNoiseThreshold ) { // else its noise
AliDebug(2,Form("Fitting max %d ped %d", max, ped));
- signalF->SetParameter(0, ped) ;
- signalF->SetParameter(1, max - ped) ;
- signalF->SetParameter(2, tmax) ;
- signalF->SetParLimits(2, 0, max_fit) ;
- gSig->Fit(signalF, "QRON", "", 0., max_fit); //, "QRON") ;
- amp = signalF->GetParameter(1);
- time = signalF->GetParameter(2) - fgTimeTrigger;
+ signalF->SetRange(0,maxFit);
+
+ if(max-ped > 50)
+ signalF->SetParLimits(2,1,3);
+
+ signalF->SetParameter(4, ped) ;
+ signalF->SetParameter(1, iMax);
+ signalF->SetParameter(0, max);
+
+ gSig->Fit(signalF, "QROW"); // Note option 'W': equal errors on all points
+ amp = signalF->GetParameter(0);
+ time = signalF->GetParameter(1)*GetRawFormatTimeBinWidth() - fgTimeTrigger;
}
return;
}
//__________________________________________________________________
Double_t AliEMCALRawUtils::RawResponseFunction(Double_t *x, Double_t *par)
{
+ // Matches version used in 2007 beam test
+ //
// Shape of the electronics raw reponse:
// It is a semi-gaussian, 2nd order Gamma function of the general form
//
// F = 0 for t < 0
//
// parameters:
- // ped: par[0]
- // A: par[1] // Amplitude = peak value
- // t0: par[2]
- // tau: fgTau
- // N: fgOrder
+ // A: par[0] // Amplitude = peak value
+ // t0: par[1]
+ // tau: par[2]
+ // N: par[3]
+ // ped: par[4]
//
Double_t signal ;
- Double_t xx = ( x[0] - par[2] + fgTau ) / fgTau ;
+ Double_t tau =par[2];
+ Double_t n =par[3];
+ Double_t ped = par[4];
+ Double_t xx = ( x[0] - par[1] + tau ) / tau ;
if (xx <= 0)
- signal = par[0] ;
+ signal = ped ;
else {
- signal = par[0] + par[1] * TMath::Power(xx , fgOrder) * TMath::Exp(fgOrder * (1 - xx )) ;
-
+ signal = ped + par[0] * TMath::Power(xx , n) * TMath::Exp(n * (1 - xx )) ;
}
return signal ;
}
// for a start time dtime and an amplitude damp given by digit,
// calculates the raw sampled response AliEMCAL::RawResponseFunction
- const Int_t kRawSignalOverflow = 0x3FF ;
- const Int_t pedVal = 32;
Bool_t lowGain = kFALSE ;
- TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
- signalF.SetParameter(0, pedVal) ;
- signalF.SetParameter(1, damp) ;
- signalF.SetParameter(2, dtime + fgTimeTrigger) ;
+ // A: par[0] // Amplitude = peak value
+ // t0: par[1]
+ // tau: par[2]
+ // N: par[3]
+ // ped: par[4]
+
+ TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeBins(), 5);
+ signalF.SetParameter(0, damp) ;
+ signalF.SetParameter(1, (dtime + fgTimeTrigger)/fgTimeBinWidth) ;
+ signalF.SetParameter(2, fTau) ;
+ signalF.SetParameter(3, fOrder);
+ signalF.SetParameter(4, fgPedestalValue);
for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
- Double_t time = iTime * GetRawFormatTimeBinWidth() ;
- Double_t signal = signalF.Eval(time) ;
+ Double_t signal = signalF.Eval(iTime) ;
+
+ //According to Terry Awes, 13-Apr-2008
+ //add gaussian noise in quadrature to each sample
+ //Double_t noise = gRandom->Gaus(0.,fgFEENoise);
+ //signal = sqrt(signal*signal + noise*noise);
+
adcH[iTime] = static_cast<Int_t>(signal + 0.5) ;
- if ( adcH[iTime] > kRawSignalOverflow ){ // larger than 10 bits
- adcH[iTime] = kRawSignalOverflow ;
+ if ( adcH[iTime] > fgkRawSignalOverflow ){ // larger than 10 bits
+ adcH[iTime] = fgkRawSignalOverflow ;
lowGain = kTRUE ;
}
signal /= fHighLowGainFactor;
adcL[iTime] = static_cast<Int_t>(signal + 0.5) ;
- if ( adcL[iTime] > kRawSignalOverflow) // larger than 10 bits
- adcL[iTime] = kRawSignalOverflow ;
+ if ( adcL[iTime] > fgkRawSignalOverflow) // larger than 10 bits
+ adcL[iTime] = fgkRawSignalOverflow ;
}
return lowGain ;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff