/* $Id$ */
+/* History of cvs commits:
+ *
+ * $Log$
+ * Revision 1.104 2005/05/28 14:19:05 schutz
+ * Compilation warnings fixed by T.P.
+ *
+ */
+
//_________________________________________________________________________
// Implementation version v1 of PHOS Manager class
-// Layout EMC + PPSD has name GPS2
-// Produces cumulated hits (no hits) and digits
+//---
+//---
+// Layout EMC + CPV has name IHEP:
+// Produces hits for CPV, cumulated hits
+//---
+//---
//*-- Author: Yves Schutz (SUBATECH)
// --- ROOT system ---
-
-#include "TBRIK.h"
-#include "TNode.h"
-#include "TRandom.h"
-
+#include <TParticle.h>
+#include <TVirtualMC.h>
// --- Standard library ---
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <strstream.h>
// --- AliRoot header files ---
-
-#include "AliPHOSv1.h"
+#include "AliPHOSCPVDigit.h"
+#include "AliPHOSGeometry.h"
#include "AliPHOSHit.h"
-#include "AliPHOSDigit.h"
-#include "AliPHOSReconstructioner.h"
+#include "AliPHOSv1.h"
#include "AliRun.h"
-#include "AliConst.h"
+#include "AliMC.h"
ClassImp(AliPHOSv1)
//____________________________________________________________________________
-AliPHOSv1::AliPHOSv1()
+AliPHOSv1::AliPHOSv1():
+ fLightYieldMean(0.),
+ fIntrinsicPINEfficiency(0.),
+ fLightYieldAttenuation(0.),
+ fRecalibrationFactor(0.),
+ fElectronsPerGeV(0.),
+ fAPDGain(0.),
+ fLightFactor(0.),
+ fAPDFactor(0.)
{
- // ctor
- fNTmpHits = 0 ;
- fTmpHits = 0 ;
+ //Def ctor.
}
//____________________________________________________________________________
AliPHOSv1::AliPHOSv1(const char *name, const char *title):
- AliPHOSv0(name,title)
+ AliPHOSv0(name,title),
+ fLightYieldMean(0.),
+ fIntrinsicPINEfficiency(0.),
+ fLightYieldAttenuation(0.),
+ fRecalibrationFactor(0.),
+ fElectronsPerGeV(0.),
+ fAPDGain(0.),
+ fLightFactor(0.),
+ fAPDFactor(0.)
{
- // ctor : title is used to identify the layout
- // GPS2 = 5 modules (EMC + PPSD)
- // We use 2 arrays of hits :
//
+ // We store hits :
// - fHits (the "normal" one), which retains the hits associated with
// the current primary particle being tracked
// (this array is reset after each primary has been tracked).
//
- // - fTmpHits, which retains all the hits of the current event. It
- // is used for the digitization part.
-
- fPinElectronicNoise = 0.010 ;
- fDigitThreshold = 0.1 ; // 1 GeV
+
+
// We do not want to save in TreeH the raw hits
// But save the cumulated hits instead (need to create the branch myself)
// It is put in the Digit Tree because the TreeH is filled after each primary
- // and the TreeD at the end of the event (branch is set in FinishEvent() ).
+ // and the TreeD at the end of the event (branch is set in FinishEvent() ).
- fTmpHits= new TClonesArray("AliPHOSHit",1000) ;
-
- fNTmpHits = fNhits = 0 ;
-
- fDigits = new TClonesArray("AliPHOSDigit",1000) ;
-
-
- fIshunt = 1 ; // All hits are associated with primary particles
-
+ fHits= new TClonesArray("AliPHOSHit",1000) ;
+ gAlice->GetMCApp()->AddHitList(fHits) ;
+
+ fNhits = 0 ;
+
+ fIshunt = 2 ; // All hits are associated with primary particles
+
+ //Photoelectron statistics:
+ // The light yield is a poissonian distribution of the number of
+ // photons created in the PbWo4 crystal, calculated using following formula
+ // NumberOfPhotons = EnergyLost * LightYieldMean* APDEfficiency *
+ // exp (-LightYieldAttenuation * DistanceToPINdiodeFromTheHit);
+ // LightYieldMean is parameter calculated to be over 47000 photons per GeV
+ // APDEfficiency is 0.02655
+ // k_0 is 0.0045 from Valery Antonenko
+ // The number of electrons created in the APD is
+ // NumberOfElectrons = APDGain * LightYield
+ // The APD Gain is 300
+ fLightYieldMean = 47000;
+ fIntrinsicPINEfficiency = 0.02655 ; //APD= 0.1875/0.1271 * 0.018 (PIN)
+ fLightYieldAttenuation = 0.0045 ;
+ fRecalibrationFactor = 13.418/ fLightYieldMean ;
+ fElectronsPerGeV = 2.77e+8 ;
+ fAPDGain = 300. ;
+ fLightFactor = fLightYieldMean * fIntrinsicPINEfficiency ;
+ fAPDFactor = (fRecalibrationFactor/100.) * fAPDGain ;
}
-//____________________________________________________________________________
-AliPHOSv1::AliPHOSv1(AliPHOSReconstructioner * Reconstructioner, const char *name, const char *title):
- AliPHOSv0(name,title)
+AliPHOSv1::AliPHOSv1(AliPHOSv1 & phos) :
+ AliPHOSv0(phos),
+ fLightYieldMean(0.),
+ fIntrinsicPINEfficiency(0.),
+ fLightYieldAttenuation(0.),
+ fRecalibrationFactor(0.),
+ fElectronsPerGeV(0.),
+ fAPDGain(0.),
+ fLightFactor(0.),
+ fAPDFactor(0.)
{
- // ctor : title is used to identify the layout
- // GPS2 = 5 modules (EMC + PPSD)
- // We use 2 arrays of hits :
- //
- // - fHits (the "normal" one), which retains the hits associated with
- // the current primary particle being tracked
- // (this array is reset after each primary has been tracked).
- //
- // - fTmpHits, which retains all the hits of the current event. It
- // is used for the digitization part.
-
- fPinElectronicNoise = 0.010 ;
-
- // We do not want to save in TreeH the raw hits
- //fHits = new TClonesArray("AliPHOSHit",100) ;
-
- fDigits = new TClonesArray("AliPHOSDigit",1000) ;
- fTmpHits= new TClonesArray("AliPHOSHit",1000) ;
-
- fNTmpHits = fNhits = 0 ;
-
- fIshunt = 1 ; // All hits are associated with primary particles
-
- // gets an instance of the geometry parameters class
- fGeom = AliPHOSGeometry::GetInstance(title, "") ;
-
- if (fGeom->IsInitialized() )
- cout << "AliPHOS" << Version() << " : PHOS geometry intialized for " << fGeom->GetName() << endl ;
- else
- cout << "AliPHOS" << Version() << " : PHOS geometry initialization failed !" << endl ;
-
- // Defining the PHOS Reconstructioner
-
- fReconstructioner = Reconstructioner ;
-
-
+ //Copy ctor. Can be wrong.
+ phos.Copy(*this) ;
}
+
//____________________________________________________________________________
AliPHOSv1::~AliPHOSv1()
{
// dtor
+ if ( fHits) {
+ fHits->Delete() ;
+ delete fHits ;
+ fHits = 0 ;
+ }
+}
- if ( fTmpHits) {
- fTmpHits->Delete() ;
- delete fTmpHits ;
- fTmpHits = 0 ;
- }
-
- if ( fEmcRecPoints ) {
- fEmcRecPoints->Delete() ;
- delete fEmcRecPoints ;
- fEmcRecPoints = 0 ;
- }
-
- if ( fPpsdRecPoints ) {
- fPpsdRecPoints->Delete() ;
- delete fPpsdRecPoints ;
- fPpsdRecPoints = 0 ;
- }
-
- if ( fTrackSegments ) {
- fTrackSegments->Delete() ;
- delete fTrackSegments ;
- fTrackSegments = 0 ;
- }
-
+//____________________________________________________________________________
+void AliPHOSv1::Copy(TObject & base)const
+{
+ TObject::Copy(base) ;
+ AliPHOSv0::Copy(base) ;
+ AliPHOSv1 &phos = static_cast<AliPHOSv1 &>(base);
+ phos.fLightYieldMean = fLightYieldMean ;
+ phos.fIntrinsicPINEfficiency = fIntrinsicPINEfficiency ;
+ phos.fLightYieldAttenuation = fLightYieldAttenuation ;
+ phos.fRecalibrationFactor = fRecalibrationFactor ;
+ phos.fElectronsPerGeV = fElectronsPerGeV ;
+ phos.fAPDGain = fAPDGain ;
+ phos.fLightFactor = fLightFactor ;
+ phos.fAPDFactor = fAPDFactor ;
}
//____________________________________________________________________________
-void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, Int_t Id, Float_t * hits)
+void AliPHOSv1::AddHit(Int_t shunt, Int_t primary, Int_t Id, Float_t * hits)
{
// Add a hit to the hit list.
- // A PHOS hit is the sum of all hits in a single crystal
- // or in a single PPSD gas cell
+ // A PHOS hit is the sum of all hits in a single crystal from one primary and within some time gate
Int_t hitCounter ;
- TClonesArray <mphits = *fTmpHits ;
AliPHOSHit *newHit ;
AliPHOSHit *curHit ;
Bool_t deja = kFALSE ;
+ AliPHOSGeometry * geom = GetGeometry() ;
- // In any case, fills the fTmpHit TClonesArray (with "accumulated hits")
-
- newHit = new AliPHOSHit(shunt, primary, tracknumber, Id, hits) ;
-
- // We do not want to save in TreeH the raw hits
- // TClonesArray &lhits = *fHits;
+ newHit = new AliPHOSHit(shunt, primary, Id, hits) ;
- for ( hitCounter = 0 ; hitCounter < fNTmpHits && !deja ; hitCounter++ ) {
- curHit = (AliPHOSHit*) ltmphits[hitCounter] ;
- if( *curHit == *newHit ) {
- *curHit = *curHit + *newHit ;
- deja = kTRUE ;
+ for ( hitCounter = fNhits-1 ; hitCounter >= 0 && !deja ; hitCounter-- ) {
+ curHit = dynamic_cast<AliPHOSHit*>((*fHits)[hitCounter]) ;
+ if(curHit->GetPrimary() != primary) break ;
+ // We add hits with the same primary, while GEANT treats primaries succesively
+ if( *curHit == *newHit ) {
+ *curHit + *newHit ;
+ deja = kTRUE ;
}
}
if ( !deja ) {
- new(ltmphits[fNTmpHits]) AliPHOSHit(*newHit) ;
- fNTmpHits++ ;
- }
-
- // We do not want to save in TreeH the raw hits
- // new(lhits[fNhits]) AliPHOSHit(*newHit) ;
- // fNhits++ ;
-
- // Please note that the fTmpHits array must survive up to the
- // end of the events, so it does not appear e.g. in ResetHits() (
- // which is called at the end of each primary).
+ new((*fHits)[fNhits]) AliPHOSHit(*newHit) ;
+ // get the block Id number
+ Int_t relid[4] ;
+ geom->AbsToRelNumbering(Id, relid) ;
+ fNhits++ ;
+ }
+
delete newHit;
+}
+
+//____________________________________________________________________________
+void AliPHOSv1::FinishPrimary()
+{
+ // called at the end of each track (primary) by AliRun
+ // hits are reset for each new track
+ // accumulate the total hit-multiplicity
}
-//___________________________________________________________________________
-Int_t AliPHOSv1::Digitize(Float_t Energy)
+//____________________________________________________________________________
+void AliPHOSv1::FinishEvent()
{
- // Applies the energy calibration
+ // called at the end of each event by AliRun
+ // accumulate the hit-multiplicity and total energy per block
+ // if the values have been updated check it
- Float_t fB = 100000000. ;
- Float_t fA = 0. ;
- Int_t chan = Int_t(fA + Energy*fB ) ;
- return chan ;
+ AliDetector::FinishEvent();
}
-
-//___________________________________________________________________________
-void AliPHOSv1::FinishEvent()
+//____________________________________________________________________________
+void AliPHOSv1::StepManager(void)
{
- // Makes the digits from the sum of summed hit in a single crystal or PPSD gas cell
- // Adds to the energy the electronic noise
- // Keeps digits with energy above fDigitThreshold
+ // Accumulates hits as long as the track stays in a single crystal or CPV gas Cell
- // Save the cumulated hits instead of raw hits (need to create the branch myself)
- // It is put in the Digit Tree because the TreeH is filled after each primary
- // and the TreeD at the end of the event.
-
-
- Int_t i ;
- Int_t relid[4];
- Int_t j ;
- TClonesArray &lDigits = *fDigits ;
- AliPHOSHit * hit ;
- AliPHOSDigit * newdigit ;
- AliPHOSDigit * curdigit ;
- Bool_t deja = kFALSE ;
+ Int_t relid[4] ; // (box, layer, row, column) indices
+ Int_t absid ; // absolute cell ID number
+ Float_t xyzte[5]={-1000.,-1000.,-1000.,0.,0.} ; // position wrt MRS, time and energy deposited
+ TLorentzVector pos ; // Lorentz vector of the track current position
+ Int_t copy ;
+
+ TString name = GetGeometry()->GetName() ;
+
+ Int_t moduleNumber ;
- for ( i = 0 ; i < fNTmpHits ; i++ ) {
- hit = (AliPHOSHit*)fTmpHits->At(i) ;
-
- // Assign primary number only if contribution is significant
- if( hit->GetEnergy() > fDigitThreshold)
- newdigit = new AliPHOSDigit( hit->GetPrimary(), hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
- else
- newdigit = new AliPHOSDigit( -1 , hit->GetId(), Digitize( hit->GetEnergy() ) ) ;
- deja =kFALSE ;
- for ( j = 0 ; j < fNdigits ; j++) {
- curdigit = (AliPHOSDigit*) lDigits[j] ;
- if ( *curdigit == *newdigit) {
- *curdigit = *curdigit + *newdigit ;
- deja = kTRUE ;
+ static Int_t idPCPQ = gMC->VolId("PCPQ");
+ if( gMC->CurrentVolID(copy) == idPCPQ &&
+ (gMC->IsTrackEntering() ) &&
+ gMC->TrackCharge() != 0) {
+
+ gMC -> TrackPosition(pos);
+
+ Float_t xyzm[3], xyzd[3] ;
+ Int_t i;
+ for (i=0; i<3; i++) xyzm[i] = pos[i];
+ gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
+
+ Float_t xyd[3]={0,0,0} ; //local position of the entering
+ xyd[0] = xyzd[0];
+ xyd[1] =-xyzd[2];
+ xyd[2] =-xyzd[1];
+
+ // Current momentum of the hit's track in the local ref. system
+ TLorentzVector pmom ; //momentum of the particle initiated hit
+ gMC -> TrackMomentum(pmom);
+ Float_t pm[3], pd[3];
+ for (i=0; i<3; i++)
+ pm[i] = pmom[i];
+
+ gMC -> Gmtod (pm, pd, 2); // transform 3-momentum from master to daughter system
+ pmom[0] = pd[0];
+ pmom[1] =-pd[1];
+ pmom[2] =-pd[2];
+
+ // Digitize the current CPV hit:
+
+ // 1. find pad response and
+ gMC->CurrentVolOffID(3,moduleNumber);
+ moduleNumber--;
+
+ TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
+ CPVDigitize(pmom,xyd,cpvDigits);
+
+ Float_t xmean = 0;
+ Float_t zmean = 0;
+ Float_t qsum = 0;
+ Int_t idigit,ndigits;
+
+ // 2. go through the current digit list and sum digits in pads
+
+ ndigits = cpvDigits->GetEntriesFast();
+ for (idigit=0; idigit<ndigits-1; idigit++) {
+ AliPHOSCPVDigit *cpvDigit1 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
+ Float_t x1 = cpvDigit1->GetXpad() ;
+ Float_t z1 = cpvDigit1->GetYpad() ;
+ for (Int_t jdigit=idigit+1; jdigit<ndigits; jdigit++) {
+ AliPHOSCPVDigit *cpvDigit2 = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(jdigit));
+ Float_t x2 = cpvDigit2->GetXpad() ;
+ Float_t z2 = cpvDigit2->GetYpad() ;
+ if (x1==x2 && z1==z2) {
+ Float_t qsum = cpvDigit1->GetQpad() + cpvDigit2->GetQpad() ;
+ cpvDigit2->SetQpad(qsum) ;
+ cpvDigits->RemoveAt(idigit) ;
+ }
}
}
- if ( !deja ) {
- new(lDigits[fNdigits]) AliPHOSDigit(* newdigit) ;
- fNdigits++ ;
+ cpvDigits->Compress() ;
+
+ // 3. add digits to temporary hit list fTmpHits
+
+ ndigits = cpvDigits->GetEntriesFast();
+ for (idigit=0; idigit<ndigits; idigit++) {
+ AliPHOSCPVDigit *cpvDigit = dynamic_cast<AliPHOSCPVDigit*>(cpvDigits->UncheckedAt(idigit));
+ relid[0] = moduleNumber + 1 ; // CPV (or PHOS) module number
+ relid[1] =-1 ; // means CPV
+ relid[2] = cpvDigit->GetXpad() ; // column number of a pad
+ relid[3] = cpvDigit->GetYpad() ; // row number of a pad
+
+ // get the absolute Id number
+ GetGeometry()->RelToAbsNumbering(relid, absid) ;
+
+ // add current digit to the temporary hit list
+
+ xyzte[3] = gMC->TrackTime() ;
+ xyzte[4] = cpvDigit->GetQpad() ; // amplitude in a pad
+
+ Int_t primary = gAlice->GetMCApp()->GetPrimary( gAlice->GetMCApp()->GetCurrentTrackNumber() );
+ AddHit(fIshunt, primary, absid, xyzte);
+
+ if (cpvDigit->GetQpad() > 0.02) {
+ xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
+ zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
+ qsum += cpvDigit->GetQpad();
+ }
}
-
- delete newdigit ;
- }
-
- // Noise induced by the PIN diode of the PbWO crystals
-
- Float_t energyandnoise ;
- for ( i = 0 ; i < fNdigits ; i++ ) {
- newdigit = (AliPHOSDigit * ) fDigits->At(i) ;
- fGeom->AbsToRelNumbering(newdigit->GetId(), relid) ;
-
- if (relid[1]==0){ // Digits belong to EMC (PbW0_4 crystals)
- energyandnoise = newdigit->GetAmp() + Digitize(gRandom->Gaus(0., fPinElectronicNoise)) ;
-
- if (energyandnoise < 0 )
- energyandnoise = 0 ;
-
- if ( newdigit->GetAmp() < fDigitThreshold ) // if threshold not surpassed, remove digit from list
- fDigits->RemoveAt(i) ;
+ if (cpvDigits) {
+ cpvDigits->Delete();
+ delete cpvDigits;
+ cpvDigits=0;
}
}
-
- fDigits->Compress() ;
-
- fNdigits = fDigits->GetEntries() ;
- for (i = 0 ; i < fNdigits ; i++) {
- newdigit = (AliPHOSDigit *) fDigits->At(i) ;
- newdigit->SetIndexInList(i) ;
- }
-
-}
-//___________________________________________________________________________
-void AliPHOSv1::MakeBranch(Option_t* opt)
-{
- // Create new branche in the current Root Tree in the digit Tree
-
- AliDetector::MakeBranch(opt) ;
+
+ static Int_t idPXTL = gMC->VolId("PXTL");
+ if(gMC->CurrentVolID(copy) == idPXTL ) { // We are inside a PBWO crystal
+
+ gMC->TrackPosition(pos) ;
+ xyzte[0] = pos[0] ;
+ xyzte[1] = pos[1] ;
+ xyzte[2] = pos[2] ;
+
+ Float_t global[3], local[3] ;
+ global[0] = pos[0] ;
+ global[1] = pos[1] ;
+ global[2] = pos[2] ;
+ Float_t lostenergy = gMC->Edep();
+
+ //Put in the TreeK particle entering PHOS and all its parents
+ if ( gMC->IsTrackEntering() ){
+ Float_t xyzd[3] ;
+ gMC -> Gmtod (xyzte, xyzd, 1); // transform coordinate from master to daughter system
+ if (xyzd[1] < -GetGeometry()->GetCrystalSize(1)/2.+0.1){ //Entered close to forward surface
+ Int_t parent = gAlice->GetMCApp()->GetCurrentTrackNumber() ;
+ TParticle * part = gAlice->GetMCApp()->Particle(parent) ;
+ Float_t vert[3],vertd[3] ;
+ vert[0]=part->Vx() ;
+ vert[1]=part->Vy() ;
+ vert[2]=part->Vz() ;
+ gMC -> Gmtod (vert, vertd, 1); // transform coordinate from master to daughter system
+ if(vertd[1]<-GetGeometry()->GetCrystalSize(1)/2.-0.1){ //Particle is created in foront of PHOS
+ //0.1 to get rid of numerical errors
+ part->SetBit(kKeepBit);
+ while ( parent != -1 ) {
+ part = gAlice->GetMCApp()->Particle(parent) ;
+ part->SetBit(kKeepBit);
+ parent = part->GetFirstMother() ;
+ }
+ }
+ }
+ }
+ if ( lostenergy != 0 ) { // Track is inside the crystal and deposits some energy
+ xyzte[3] = gMC->TrackTime() ;
+
+ gMC->CurrentVolOffID(10, moduleNumber) ; // get the PHOS module number ;
+
+ Int_t strip ;
+ gMC->CurrentVolOffID(3, strip);
+ Int_t cell ;
+ gMC->CurrentVolOffID(2, cell);
+
+ Int_t row = 1 + GetGeometry()->GetNZ() - strip % GetGeometry()->GetNZ() ;
+ Int_t col = (Int_t) TMath::Ceil((Double_t) strip/GetGeometry()->GetNZ()) -1 ;
+
+ absid = (moduleNumber-1)*GetGeometry()->GetNCristalsInModule() +
+ row + (col*GetGeometry()->GetEMCAGeometry()->GetNCellsInStrip() + cell-1)*GetGeometry()->GetNZ() ;
+
+ gMC->Gmtod(global, local, 1) ;
+
+ //Calculates the light yield, the number of photons produced in the
+ //crystal
+ Float_t lightYield = gRandom->Poisson(fLightFactor * lostenergy *
+ exp(-fLightYieldAttenuation *
+ (local[1]+GetGeometry()->GetCrystalSize(1)/2.0 ))
+ ) ;
+
+ //Calculates de energy deposited in the crystal
+ xyzte[4] = fAPDFactor * lightYield ;
+
+ Int_t primary ;
+ if(fIshunt == 2){
+ primary = gAlice->GetMCApp()->GetCurrentTrackNumber() ;
+ TParticle * part = gAlice->GetMCApp()->Particle(primary) ;
+ while ( !part->TestBit(kKeepBit) ) {
+ primary = part->GetFirstMother() ;
+ if(primary == -1){
+ primary = gAlice->GetMCApp()->GetPrimary( gAlice->GetMCApp()->GetCurrentTrackNumber() );
+ break ; //there is a possibility that particle passed e.g. thermal isulator and hits a side
+ //surface of the crystal. In this case it may have no primary at all.
+ //We can not easily separate this case from the case when this is part of the shower,
+ //developed in the neighboring crystal.
+ }
+ part = gAlice->GetMCApp()->Particle(primary) ;
+ }
+ }
+ else
+ primary = gAlice->GetMCApp()->GetPrimary( gAlice->GetMCApp()->GetCurrentTrackNumber() );
+
+
+
+ // add current hit to the hit list
+ // Info("StepManager","%d %d", primary, tracknumber) ;
+ AddHit(fIshunt, primary, absid, xyzte);
+
+ } // there is deposited energy
+ } // we are inside a PHOS Xtal
- char branchname[10];
- sprintf(branchname,"%s",GetName());
- char *cdD = strstr(opt,"D");
- if (fDigits && gAlice->TreeD() && cdD) {
- gAlice->TreeD()->Branch(branchname, &fDigits, fBufferSize);
- }
-
- // Create new branche PHOSCH in the current Root Tree in the digit Tree for accumulated Hits
- if ( ! (gAlice->IsLegoRun()) ) { // only when not in lego plot mode
- if ( fTmpHits && gAlice->TreeD() && cdD) {
- char branchname[10] ;
- sprintf(branchname, "%sCH", GetName()) ;
- gAlice->TreeD()->Branch(branchname, &fTmpHits, fBufferSize) ;
- }
- }
-
}
-
-//_____________________________________________________________________________
-void AliPHOSv1::Reconstruction(AliPHOSReconstructioner * Reconstructioner)
-{
- // 1. Reinitializes the existing RecPoint, TrackSegment, and RecParticles Lists and
- // 2. Creates TreeR with a branch for each list
- // 3. Steers the reconstruction processes
- // 4. Saves the 3 lists in TreeR
- // 5. Write the Tree to File
-
- fReconstructioner = Reconstructioner ;
-
- char branchname[10] ;
-
- // 1.
-
- // gAlice->MakeTree("R") ;
- Int_t splitlevel = 0 ;
-
- if (fEmcRecPoints) {
- fEmcRecPoints->Delete() ;
- delete fEmcRecPoints ;
- fEmcRecPoints = 0 ;
- }
-
- // fEmcRecPoints= new AliPHOSRecPoint::RecPointsList("AliPHOSEmcRecPoint", 1000) ; if TClonesArray
- fEmcRecPoints= new AliPHOSRecPoint::RecPointsList(2000) ;
-
- if ( fEmcRecPoints && gAlice->TreeR() ) {
- sprintf(branchname,"%sEmcRP",GetName()) ;
-
- // gAlice->TreeR()->Branch(branchname, &fEmcRecPoints, fBufferSize); if TClonesArray
- gAlice->TreeR()->Branch(branchname, "TObjArray", &fEmcRecPoints, fBufferSize, splitlevel) ;
- }
-
- if (fPpsdRecPoints) {
- fPpsdRecPoints->Delete() ;
- delete fPpsdRecPoints ;
- fPpsdRecPoints = 0 ;
- }
-
- // fPpsdRecPoints = new AliPHOSRecPoint::RecPointsList("AliPHOSPpsdRecPoint", 1000) ; if TClonesArray
- fPpsdRecPoints = new AliPHOSRecPoint::RecPointsList(2000) ;
-
- if ( fPpsdRecPoints && gAlice->TreeR() ) {
- sprintf(branchname,"%sPpsdRP",GetName()) ;
-
- // gAlice->TreeR()->Branch(branchname, &fPpsdRecPoints, fBufferSize); if TClonesArray
- gAlice->TreeR()->Branch(branchname, "TObjArray", &fPpsdRecPoints, fBufferSize, splitlevel) ;
- }
-
- if (fTrackSegments) {
- fTrackSegments->Delete() ;
- delete fTrackSegments ;
- fTrackSegments = 0 ;
- }
-
- fTrackSegments = new AliPHOSTrackSegment::TrackSegmentsList("AliPHOSTrackSegment", 2000) ;
- if ( fTrackSegments && gAlice->TreeR() ) {
- sprintf(branchname,"%sTS",GetName()) ;
- gAlice->TreeR()->Branch(branchname, &fTrackSegments, fBufferSize) ;
+//____________________________________________________________________________
+void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, TClonesArray *cpvDigits)
+{
+ // ------------------------------------------------------------------------
+ // Digitize one CPV hit:
+ // On input take exact 4-momentum p and position zxhit of the hit,
+ // find the pad response around this hit and
+ // put the amplitudes in the pads into array digits
+ //
+ // Author: Yuri Kharlov (after Serguei Sadovsky)
+ // 2 October 2000
+ // ------------------------------------------------------------------------
+
+ const Float_t kCelWr = GetGeometry()->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad)
+ const Float_t kDetR = 0.1; // Relative energy fluctuation in track for 100 e-
+ const Float_t kdEdx = 4.0; // Average energy loss in CPV;
+ const Int_t kNgamz = 5; // Ionization size in Z
+ const Int_t kNgamx = 9; // Ionization size in Phi
+ const Float_t kNoise = 0.03; // charge noise in one pad
+
+ Float_t rnor1,rnor2;
+
+ // Just a reminder on axes notation in the CPV module:
+ // axis Z goes along the beam
+ // axis X goes across the beam in the module plane
+ // axis Y is a normal to the module plane showing from the IP
+
+ Float_t hitX = zxhit[0];
+ Float_t hitZ =-zxhit[1];
+ Float_t pX = p.Px();
+ Float_t pZ =-p.Pz();
+ Float_t pNorm = p.Py();
+ Float_t eloss = kdEdx;
+
+//Info("CPVDigitize", "YVK : %f %f | %f %f %d", hitX, hitZ, pX, pZ, pNorm) ;
+
+ Float_t dZY = pZ/pNorm * GetGeometry()->GetCPVGasThickness();
+ Float_t dXY = pX/pNorm * GetGeometry()->GetCPVGasThickness();
+ gRandom->Rannor(rnor1,rnor2);
+ eloss *= (1 + kDetR*rnor1) *
+ TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(GetGeometry()->GetCPVGasThickness(),2)));
+ Float_t zhit1 = hitZ + GetGeometry()->GetCPVActiveSize(1)/2 - dZY/2;
+ Float_t xhit1 = hitX + GetGeometry()->GetCPVActiveSize(0)/2 - dXY/2;
+ Float_t zhit2 = zhit1 + dZY;
+ Float_t xhit2 = xhit1 + dXY;
+
+ Int_t iwht1 = (Int_t) (xhit1 / kCelWr); // wire (x) coordinate "in"
+ Int_t iwht2 = (Int_t) (xhit2 / kCelWr); // wire (x) coordinate "out"
+
+ Int_t nIter;
+ Float_t zxe[3][5];
+ if (iwht1==iwht2) { // incline 1-wire hit
+ nIter = 2;
+ zxe[0][0] = (zhit1 + zhit2 - dZY*0.57735) / 2;
+ zxe[1][0] = (iwht1 + 0.5) * kCelWr;
+ zxe[2][0] = eloss/2;
+ zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2;
+ zxe[1][1] = (iwht1 + 0.5) * kCelWr;
+ zxe[2][1] = eloss/2;
}
-
- if (fRecParticles) {
- fRecParticles->Delete() ;
- delete fRecParticles ;
- fRecParticles = 0 ;
+ else if (TMath::Abs(iwht1-iwht2) != 1) { // incline 3-wire hit
+ nIter = 3;
+ Int_t iwht3 = (iwht1 + iwht2) / 2;
+ Float_t xwht1 = (iwht1 + 0.5) * kCelWr; // wire 1
+ Float_t xwht2 = (iwht2 + 0.5) * kCelWr; // wire 2
+ Float_t xwht3 = (iwht3 + 0.5) * kCelWr; // wire 3
+ Float_t xwr13 = (xwht1 + xwht3) / 2; // center 13
+ Float_t xwr23 = (xwht2 + xwht3) / 2; // center 23
+ Float_t dxw1 = xhit1 - xwr13;
+ Float_t dxw2 = xhit2 - xwr23;
+ Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
+ Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
+ Float_t egm3 = kCelWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + kCelWr );
+ zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2;
+ zxe[1][0] = xwht1;
+ zxe[2][0] = eloss * egm1;
+ zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2;
+ zxe[1][1] = xwht2;
+ zxe[2][1] = eloss * egm2;
+ zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1;
+ zxe[1][2] = xwht3;
+ zxe[2][2] = eloss * egm3;
}
- fRecParticles = new AliPHOSRecParticle::RecParticlesList("AliPHOSRecParticle", 2000) ;
- if ( fRecParticles && gAlice->TreeR() ) {
- sprintf(branchname,"%sRP",GetName()) ;
- gAlice->TreeR()->Branch(branchname, &fRecParticles, fBufferSize) ;
+ else { // incline 2-wire hit
+ nIter = 2;
+ Float_t xwht1 = (iwht1 + 0.5) * kCelWr;
+ Float_t xwht2 = (iwht2 + 0.5) * kCelWr;
+ Float_t xwr12 = (xwht1 + xwht2) / 2;
+ Float_t dxw1 = xhit1 - xwr12;
+ Float_t dxw2 = xhit2 - xwr12;
+ Float_t egm1 = TMath::Abs(dxw1) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
+ Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) );
+ zxe[0][0] = (zhit1 + zhit2 - dZY*egm1) / 2;
+ zxe[1][0] = xwht1;
+ zxe[2][0] = eloss * egm1;
+ zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2;
+ zxe[1][1] = xwht2;
+ zxe[2][1] = eloss * egm2;
}
-
- // 3.
-
- fReconstructioner->Make(fDigits, fEmcRecPoints, fPpsdRecPoints, fTrackSegments, fRecParticles);
-
- // 4. Expand or Shrink the arrays to the proper size
-
- Int_t size ;
-
- size = fEmcRecPoints->GetEntries() ;
- fEmcRecPoints->Expand(size) ;
-
- size = fPpsdRecPoints->GetEntries() ;
- fPpsdRecPoints->Expand(size) ;
-
- size = fTrackSegments->GetEntries() ;
- fTrackSegments->Expand(size) ;
- size = fRecParticles->GetEntries() ;
- fRecParticles->Expand(size) ;
-
- gAlice->TreeR()->Fill() ;
- cout << "filled" << endl ;
- // 5.
-
- gAlice->TreeR()->Write(0,TObject::kOverwrite) ;
- cout << "writen" << endl ;
-
- // Deleting reconstructed objects
- ResetReconstruction();
-
-}
-
-//____________________________________________________________________________
-void AliPHOSv1::ResetDigits()
-{
- // May sound strange, but cumulative hits are store in digits Tree
- AliDetector::ResetDigits();
- if( fTmpHits ) {
- fTmpHits->Delete();
- fNTmpHits = 0 ;
+ // Finite size of ionization region
+
+ Int_t nCellZ = GetGeometry()->GetNumberOfCPVPadsZ();
+ Int_t nCellX = GetGeometry()->GetNumberOfCPVPadsPhi();
+ Int_t nz3 = (kNgamz+1)/2;
+ Int_t nx3 = (kNgamx+1)/2;
+ cpvDigits->Expand(nIter*kNgamx*kNgamz);
+ TClonesArray &ldigits = *(static_cast<TClonesArray *>(cpvDigits));
+
+ for (Int_t iter=0; iter<nIter; iter++) {
+
+ Float_t zhit = zxe[0][iter];
+ Float_t xhit = zxe[1][iter];
+ Float_t qhit = zxe[2][iter];
+ Float_t zcell = zhit / GetGeometry()->GetPadSizeZ();
+ Float_t xcell = xhit / GetGeometry()->GetPadSizePhi();
+ if ( zcell<=0 || xcell<=0 ||
+ zcell>=nCellZ || xcell>=nCellX) return;
+ Int_t izcell = (Int_t) zcell;
+ Int_t ixcell = (Int_t) xcell;
+ Float_t zc = zcell - izcell - 0.5;
+ Float_t xc = xcell - ixcell - 0.5;
+ for (Int_t iz=1; iz<=kNgamz; iz++) {
+ Int_t kzg = izcell + iz - nz3;
+ if (kzg<=0 || kzg>nCellZ) continue;
+ Float_t zg = (Float_t)(iz-nz3) - zc;
+ for (Int_t ix=1; ix<=kNgamx; ix++) {
+ Int_t kxg = ixcell + ix - nx3;
+ if (kxg<=0 || kxg>nCellX) continue;
+ Float_t xg = (Float_t)(ix-nx3) - xc;
+
+ // Now calculate pad response
+ Float_t qpad = CPVPadResponseFunction(qhit,zg,xg);
+ qpad += kNoise*rnor2;
+ if (qpad<0) continue;
+
+ // Fill the array with pad response ID and amplitude
+ new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad);
+ }
+ }
}
-}
-//____________________________________________________________________________
-void AliPHOSv1::ResetReconstruction()
-{
- // Deleting reconstructed objects
-
- if ( fEmcRecPoints ) fEmcRecPoints->Delete();
- if ( fPpsdRecPoints ) fPpsdRecPoints->Delete();
- if ( fTrackSegments ) fTrackSegments->Delete();
- if ( fRecParticles ) fRecParticles->Delete();
-
}
//____________________________________________________________________________
-void AliPHOSv1::SetTreeAddress()
-{
- // TBranch *branch;
- AliPHOS::SetTreeAddress();
-
- // //Branch address for TreeR: RecPpsdRecPoint
-// TTree *treeR = gAlice->TreeR();
-// if ( treeR && fPpsdRecPoints ) {
-// branch = treeR->GetBranch("PHOSPpsdRP");
-// if (branch) branch->SetAddress(&fPpsdRecPoints) ;
- // }
+Float_t AliPHOSv1::CPVPadResponseFunction(Float_t qhit, Float_t zhit, Float_t xhit) {
+ // ------------------------------------------------------------------------
+ // Calculate the amplitude in one CPV pad using the
+ // cumulative pad response function
+ // Author: Yuri Kharlov (after Serguei Sadovski)
+ // 3 October 2000
+ // ------------------------------------------------------------------------
+
+ Double_t dz = GetGeometry()->GetPadSizeZ() / 2;
+ Double_t dx = GetGeometry()->GetPadSizePhi() / 2;
+ Double_t z = zhit * GetGeometry()->GetPadSizeZ();
+ Double_t x = xhit * GetGeometry()->GetPadSizePhi();
+ Double_t amplitude = qhit *
+ (CPVCumulPadResponse(z+dz,x+dx) - CPVCumulPadResponse(z+dz,x-dx) -
+ CPVCumulPadResponse(z-dz,x+dx) + CPVCumulPadResponse(z-dz,x-dx));
+ return (Float_t)amplitude;
}
//____________________________________________________________________________
-
-void AliPHOSv1::StepManager(void)
-{
- // Accumulates hits as long as the track stays in a single crystal or PPSD gas Cell
-
- Int_t relid[4] ; // (box, layer, row, column) indices
- Float_t xyze[4] ; // position wrt MRS and energy deposited
- TLorentzVector pos ;
- Int_t copy ;
-
- Int_t tracknumber = gAlice->CurrentTrack() ;
- Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
- TString name = fGeom->GetName() ;
- if ( name == "GPS2" ) { // the CPV is a PPSD
- if( gMC->CurrentVolID(copy) == gMC->VolId("GCEL") ) // We are inside a gas cell
- {
- gMC->TrackPosition(pos) ;
- xyze[0] = pos[0] ;
- xyze[1] = pos[1] ;
- xyze[2] = pos[2] ;
- xyze[3] = gMC->Edep() ;
-
- if ( xyze[3] != 0 ) { // there is deposited energy
- gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number
- gMC->CurrentVolOffID(3, relid[1]) ; // get the Micromegas Module number
- // 1-> Geom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() upper
- // > fGeom->GetNumberOfModulesPhi() * fGeom->GetNumberOfModulesZ() lower
- gMC->CurrentVolOffID(1, relid[2]) ; // get the row number of the cell
- gMC->CurrentVolID(relid[3]) ; // get the column number
-
- // get the absolute Id number
-
- Int_t absid ;
- fGeom->RelToAbsNumbering(relid, absid) ;
-
- // add current hit to the hit list
- AddHit(fIshunt, primary, tracknumber, absid, xyze);
-
- } // there is deposited energy
- } // We are inside the gas of the CPV
- } // GPS2 configuration
-
- if(gMC->CurrentVolID(copy) == gMC->VolId("PXTL") ) // We are inside a PBWO crystal
- {
- gMC->TrackPosition(pos) ;
- xyze[0] = pos[0] ;
- xyze[1] = pos[1] ;
- xyze[2] = pos[2] ;
- xyze[3] = gMC->Edep() ;
-
- if ( xyze[3] != 0 ) {
- gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
- relid[1] = 0 ; // means PBW04
- gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
- gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
-
- // get the absolute Id number
-
- Int_t absid ;
- fGeom->RelToAbsNumbering(relid, absid) ;
-
- // add current hit to the hit list
-
- AddHit(fIshunt, primary,tracknumber, absid, xyze);
-
- } // there is deposited energy
- } // we are inside a PHOS Xtal
+Double_t AliPHOSv1::CPVCumulPadResponse(Double_t x, Double_t y) {
+ // ------------------------------------------------------------------------
+ // Cumulative pad response function
+ // It includes several terms from the CF decomposition in electrostatics
+ // Note: this cumulative function is wrong since omits some terms
+ // but the cell amplitude obtained with it is correct because
+ // these omitting terms cancel
+ // Author: Yuri Kharlov (after Serguei Sadovski)
+ // 3 October 2000
+ // ------------------------------------------------------------------------
+
+ const Double_t kA=1.0;
+ const Double_t kB=0.7;
+
+ Double_t r2 = x*x + y*y;
+ Double_t xy = x*y;
+ Double_t cumulPRF = 0;
+ for (Int_t i=0; i<=4; i++) {
+ Double_t b1 = (2*i + 1) * kB;
+ cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) );
+ }
+ cumulPRF *= kA/(2*TMath::Pi());
+ return cumulPRF;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff