#include <TFolder.h>
#include <TTree.h>
#include <TVirtualMC.h>
+#include <TH1F.h>
+#include <TF1.h>
+#include <TRandom.h>
// --- Standard library ---
// --- AliRoot header files ---
#include "AliMagF.h"
#include "AliPHOS.h"
-#include "AliPHOSLoader.h"
+#include "AliPHOSGetter.h"
#include "AliRun.h"
#include "AliPHOSDigitizer.h"
#include "AliPHOSSDigitizer.h"
#include "AliPHOSDigit.h"
#include "AliAltroBuffer.h"
+#include "AliLog.h"
ClassImp(AliPHOS)
+
+Double_t AliPHOS::fgCapa = 1.; // 1pF
+Int_t AliPHOS::fgOrder = 2 ;
+Double_t AliPHOS::fgTimeMax = 2.56E-5 ; // each sample is over 100 ns fTimeMax/fTimeBins
+Double_t AliPHOS::fgTimePeak = 4.1E-6 ; // 4 micro seconds
+Double_t AliPHOS::fgTimeTrigger = 100E-9 ; // 100ns, just for a reference
+
+
//____________________________________________________________________________
-AliPHOS:: AliPHOS() : AliDetector()
+ AliPHOS:: AliPHOS() : AliDetector()
{
// Default ctor
- fName="PHOS";
+ fName = "PHOS" ;
fQATask = 0;
fTreeQA = 0;
fDebug = 0;
+
}
//____________________________________________________________________________
-AliPHOS::AliPHOS(const char* name, const char* title): AliDetector(name, title)
+AliPHOS::AliPHOS(const char* name, const char* title): AliDetector(name, title)
{
// ctor : title is used to identify the layout
- fQATask = 0;
- fTreeQA = 0;
- fDebug = 0;
+ fQATask = 0 ;
+ fTreeQA = 0 ;
+ fDebug = 0 ;
+ fHighCharge = 8.2 ; // adjusted for a high gain range of 5.12 GeV (10 bits)
+ fHighGain = 6.64 ;
+ fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits)
+ fLowGainOffset = GetGeometry()->GetNModules() + 1 ;
+ // offset added to the module id to distinguish high and low gain data
}
//____________________________________________________________________________
AliPHOS::~AliPHOS()
{
-
}
//____________________________________________________________________________
}
+//____________________________________________________________________________
+void AliPHOS::Digits2Raw()
+{
+// convert digits of the current event to raw data
+
+ AliPHOSLoader * loader = dynamic_cast<AliPHOSLoader*>(fLoader) ;
+
+ // get the digits
+ loader->LoadDigits();
+ TClonesArray* digits = loader->Digits() ;
+
+ if (!digits) {
+ Error("Digits2Raw", "no digits found !");
+ return;
+ }
+
+ // get the digitizer
+ loader->LoadDigitizer();
+ AliPHOSDigitizer * digitizer = dynamic_cast<AliPHOSDigitizer *>(loader->Digitizer()) ;
+
+ // get the geometry
+ AliPHOSGeometry* geom = GetGeometry();
+ if (!geom) {
+ Error("Digits2Raw", "no geometry found !");
+ return;
+ }
+
+ // some digitization constants
+ const Int_t kDDLOffset = 0x600; // assigned to PHOS
+ const Int_t kThreshold = 1; // skip digits below this threshold
+
+ AliAltroBuffer* buffer = NULL;
+ Int_t prevDDL = -1;
+ Int_t adcValuesLow[fkTimeBins];
+ Int_t adcValuesHigh[fkTimeBins];
+
+ // loop over digits (assume ordered digits)
+ for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
+ AliPHOSDigit* digit = dynamic_cast<AliPHOSDigit *>(digits->At(iDigit)) ;
+ if (digit->GetAmp() < kThreshold)
+ continue;
+ Int_t relId[4];
+ geom->AbsToRelNumbering(digit->GetId(), relId);
+ Int_t module = relId[0];
+
+ // Begin FIXME
+ if (relId[1] != 0)
+ continue; // ignore digits from CPV
+ // End FIXME
+
+ // PHOS EMCA has 4 DDL per module. Splitting is done based on the row number
+ Int_t iDDL = 4 * (module - 1) + (4 * (relId[2] - 1)) / geom->GetNPhi();
+
+ // new DDL
+ if (iDDL != prevDDL) {
+ // write real header and close previous file
+ if (buffer) {
+ buffer->Flush();
+ buffer->WriteDataHeader(kFALSE, kFALSE);
+ delete buffer;
+ }
+
+ // open new file and write dummy header
+ TString fileName("PHOS_") ;
+ fileName += (iDDL + kDDLOffset) ;
+ fileName += ".ddl" ;
+ buffer = new AliAltroBuffer(fileName.Data(), 1);
+ buffer->WriteDataHeader(kTRUE, kFALSE); //Dummy;
+
+ prevDDL = iDDL;
+ }
+
+ // out of time range signal (?)
+ if (digit->GetTimeR() > GetRawFormatTimeMax() ) {
+ buffer->FillBuffer(digit->GetAmp());
+ buffer->FillBuffer(GetRawFormatTimeBins() ); // time bin
+ buffer->FillBuffer(3); // bunch length
+ buffer->WriteTrailer(3, relId[3], relId[2], module); // trailer
+
+ // calculate the time response function
+ } else {
+ Double_t energy = 0 ;
+ if ( digit->GetId() <= geom->GetNModules() * geom->GetNCristalsInModule())
+ energy = digit->GetAmp() * digitizer->GetEMCchannel() + digitizer->GetEMCpedestal() ;
+ else
+ energy = digit->GetAmp() * digitizer->GetCPVchannel() + digitizer->GetCPVpedestal() ;
+
+ RawSampledResponse(digit->GetTimeR(), energy, adcValuesHigh, adcValuesLow) ;
+
+ buffer->WriteChannel(relId[3], relId[2], module,
+ GetRawFormatTimeBins(), adcValuesHigh, kThreshold);
+ buffer->WriteChannel(relId[3], relId[2], module + fLowGainOffset,
+ GetRawFormatTimeBins(), adcValuesLow, kThreshold);
+ }
+ }
+
+ // write real header and close last file
+ if (buffer) {
+ buffer->Flush();
+ buffer->WriteDataHeader(kFALSE, kFALSE);
+ delete buffer;
+ }
+
+ loader->UnloadDigits();
+}
+
//____________________________________________________________________________
void AliPHOS::Hits2SDigits()
{
return fLoader;
}
+//__________________________________________________________________
+Double_t AliPHOS::RawResponseFunction(Double_t *x, Double_t *par)
+{
+ // Shape of the electronics raw reponse:
+ // It is a semi-gaussian, 2nd order Gamma function of the general form
+ // v(t) = n**n * Q * A**n / C *(t/tp)**n * exp(-n * t/tp) with
+ // tp : peaking time par[0]
+ // n : order of the function
+ // C : integrating capacitor in the preamplifier
+ // A : open loop gain of the preamplifier
+ // Q : the total APD charge to be measured Q = C * energy
+
+ Double_t signal ;
+ Double_t xx = x[0] - ( fgTimeTrigger + par[3] ) ;
+
+ if (xx < 0 || xx > fgTimeMax)
+ signal = 0. ;
+ else {
+ Double_t fac = par[0] * TMath::Power(fgOrder, fgOrder) * TMath::Power(par[1], fgOrder) / fgCapa ;
+ signal = fac * par[2] * TMath::Power(xx / fgTimePeak, fgOrder) * TMath::Exp(-fgOrder * (xx / fgTimePeak)) ;
+ }
+ return signal ;
+}
+
+//__________________________________________________________________
+Double_t AliPHOS::RawResponseFunctionMax(Double_t charge, Double_t gain)
+{
+ return ( charge * TMath::Power(fgOrder, fgOrder) * TMath::Power(gain, fgOrder)
+ / ( fgCapa * TMath::Exp(fgOrder) ) );
+
+}
+
+//__________________________________________________________________
+Bool_t AliPHOS::RawSampledResponse(const Double_t dtime, const Double_t damp, Int_t * adcH, Int_t * adcL) const
+{
+ // for a start time dtime and an amplitude damp given by digit,
+ // calculates the raw sampled response AliPHOS::RawResponseFunction
+
+ const Int_t kRawSignalOverflow = 0x3FF ;
+ Bool_t lowGain = kFALSE ;
+
+ TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
+
+ for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
+ signalF.SetParameter(0, GetRawFormatHighCharge() ) ;
+ signalF.SetParameter(1, GetRawFormatHighGain() ) ;
+ signalF.SetParameter(2, damp) ;
+ signalF.SetParameter(3, dtime) ;
+ Double_t time = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
+ Double_t signal = signalF.Eval(time) ;
+ if ( static_cast<Int_t>(signal+0.5) > kRawSignalOverflow ){ // larger than 10 bits
+ signal = kRawSignalOverflow ;
+ lowGain = kTRUE ;
+ }
+ adcH[iTime] = static_cast<Int_t>(signal + 0.5) ;
+
+ signalF.SetParameter(0, GetRawFormatLowCharge() ) ;
+ signalF.SetParameter(1, GetRawFormatLowGain() ) ;
+ signal = signalF.Eval(time) ;
+ if ( static_cast<Int_t>(signal+0.5) > kRawSignalOverflow) // larger than 10 bits
+ signal = kRawSignalOverflow ;
+ adcL[iTime] = static_cast<Int_t>(0.5 + signal ) ;
+
+ }
+ return lowGain ;
+}
+
//____________________________________________________________________________
void AliPHOS::SetTreeAddress()
{
//fTreeQA->Fill() ;
}
-//____________________________________________________________________________
-void AliPHOS::Digits2Raw()
-{
-// convert digits of the current event to raw data
-
- // get the digits
- ((AliPHOSLoader*) fLoader)->LoadDigits();
- TClonesArray* digits = ((AliPHOSLoader*) fLoader)->Digits();
- if (!digits) {
- Error("Digits2Raw", "no digits");
- return;
- }
-
- // get the geometry
- AliPHOSGeometry* geom = GetGeometry();
- if (!geom) {
- Error("Digits2Raw", "no geometry");
- return;
- }
-
- // some digitization constants
- const Int_t kDDLOffset = 0x600;
- const Double_t kTimeMax = 1.28E-5;
- const Int_t kTimeBins = 256;
- const Double_t kTimePeak = 2.0E-6;
- const Double_t kTimeRes = 1.5E-6;
- const Int_t kThreshold = 3;
- const Int_t kHighGainFactor = 40;
- const Int_t kHighGainOffset = 0x200;
-
- AliAltroBuffer* buffer = NULL;
- Int_t prevDDL = -1;
- Int_t adcValuesLow[kTimeBins];
- Int_t adcValuesHigh[kTimeBins];
-
- // loop over digits (assume ordered digits)
- for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
- AliPHOSDigit* digit = (AliPHOSDigit*) digits->At(iDigit);
- if (digit->GetAmp() < kThreshold) continue;
- Int_t relId[4];
- geom->AbsToRelNumbering(digit->GetId(), relId);
- Int_t module = relId[0];
- if (relId[1] != 0) continue; // ignore digits from CPV
- Int_t iDDL = 4 * (module - 1) + (4 * (relId[2] - 1)) / geom->GetNPhi();
-
- // new DDL
- if (iDDL != prevDDL) {
- // write real header and close previous file
- if (buffer) {
- buffer->Flush();
- buffer->WriteDataHeader(kFALSE, kFALSE);
- delete buffer;
- }
-
- // open new file and write dummy header
- char fileName[256];
- sprintf(fileName, "PHOS_%d.ddl", iDDL + kDDLOffset);
- buffer = new AliAltroBuffer(fileName, 1);
- buffer->WriteDataHeader(kTRUE, kFALSE); //Dummy;
-
- prevDDL = iDDL;
- }
-
- // out of time range signal (?)
- if (digit->GetTime() > kTimeMax) {
- buffer->FillBuffer(digit->GetAmp());
- buffer->FillBuffer(kTimeBins); // time bin
- buffer->FillBuffer(3); // bunch length
- buffer->WriteTrailer(3, relId[3], relId[2], module); // trailer
-
- // simulate linear rise and gaussian decay of signal
- } else {
- Bool_t highGain = kFALSE;
-
- // fill time bin values
- for (Int_t iTime = 0; iTime < kTimeBins; iTime++) {
- Double_t time = iTime * kTimeMax/kTimeBins;
- Int_t signal = 0;
- if (time < digit->GetTime() + kTimePeak) {
- signal = Int_t(0.5 + digit->GetAmp() *
- (time - digit->GetTime()) / kTimePeak);
- } else {
- signal = Int_t(0.5 + digit->GetAmp() *
- TMath::Gaus(time, digit->GetTime() + kTimePeak, kTimeRes));
- }
- if (signal < 0) signal = 0;
- adcValuesLow[iTime] = signal;
- if (signal > 0x3FF) adcValuesLow[iTime] = 0x3FF;
- adcValuesHigh[iTime] = signal / kHighGainFactor;
- if (adcValuesHigh[iTime] > 0) highGain = kTRUE;
- }
-
- // write low and eventually high gain channel
- buffer->WriteChannel(relId[3], relId[2], module,
- kTimeBins, adcValuesLow, kThreshold);
- if (highGain) {
- buffer->WriteChannel(relId[3], relId[2], module + kHighGainOffset,
- kTimeBins, adcValuesHigh, 1);
- }
- }
- }
-
- // write real header and close last file
- if (buffer) {
- buffer->Flush();
- buffer->WriteDataHeader(kFALSE, kFALSE);
- delete buffer;
- }
-
- fLoader->UnloadDigits();
-}
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff