* provided "as is" without express or implied warranty. *
**************************************************************************/
+/* $Id$ */
+
//_________________________________________________________________________
-// Manager class for PHOS version SUBATECH
-//*-- Author : Odd Harald Oddland & Gines Martinez Feb-2000
-// The main goal of this version of AliPHOS is to calculted the
-// induced charged in the PIN diode, taking into account light
-// tracking in the PbWO4 crystal, induced signal in the
-// PIN due to MIPS particle and electronic noise.
-// In this respect, this class derived from AliPHOSv0 and
-// only the StepManager function has been "surcharged"
-//////////////////////////////////////////////////////////////////////////////
+// Implementation version v1 of PHOS Manager class
+// Layout EMC + PPSD has name GPS2
+// Produces cumulated hits (no hits) and digits
+//*-- Author: Yves Schutz (SUBATECH)
+
// --- ROOT system ---
+
+#include "TBRIK.h"
+#include "TNode.h"
#include "TRandom.h"
+#include "TTree.h"
+
// --- Standard library ---
-#include <cstdio>
-#include <cstring>
-#include <cstdlib>
-#include <strstream>
-#include <cassert>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <strstream.h>
// --- AliRoot header files ---
#include "AliPHOSv1.h"
#include "AliPHOSHit.h"
#include "AliPHOSDigit.h"
+#include "AliPHOSReconstructioner.h"
#include "AliRun.h"
#include "AliConst.h"
+#include "AliMC.h"
ClassImp(AliPHOSv1)
//____________________________________________________________________________
- AliPHOSv1::AliPHOSv1() :
- AliPHOSv0()
-{
+AliPHOSv1::AliPHOSv1()
+{
+ // ctor
+ fNTmpHits = 0 ;
+ fTmpHits = 0 ;
+
+ // Create an empty array of AliPHOSCPVModule to satisfy
+ // AliPHOSv1::Streamer when reading root file
+
+ if ( NULL==(fCPVModules=new TClonesArray("AliPHOSCPVModule",0)) ) {
+ Error("AliPHOSv1","Can not create array of CPV modules");
+ exit(1);
+ }
+
}
//____________________________________________________________________________
AliPHOSv1::AliPHOSv1(const char *name, const char *title):
- AliPHOSv0(name,title)
+AliPHOSv0(name,title)
{
- fLightYieldMean = 700000. ;
- fIntrinsicPINEfficiency = 0.1875 ;
- fLightYieldAttenuation = 0.0045 ;
- fRecalibrationFactor = 6.2 / fLightYieldMean ;
+ // ctor : title is used to identify the layout
+ // GPS2 = 5 modules (EMC + PPSD)
+ // IHEP = 5 modules (EMC + CPV )
+ // 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 ;
+ 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() ).
+
+ fTmpHits= new TClonesArray("AliPHOSHit",1000) ;
+
+ fNTmpHits = fNhits = 0 ;
+
+ fDigits = new TClonesArray("AliPHOSDigit",1000) ;
+
+ fIshunt = 1 ; // All hits are associated with primary particles
+
+ // Create array of CPV modules for the IHEP's version of CPV
+
+ if ( strcmp(fGeom->GetName(),"IHEP") == 0 ) {
+ // Create array of AliPHOSCPVmodule of the size of PHOS modules number
+
+ if ( NULL==(fCPVModules=new TClonesArray("AliPHOSCPVModule",fGeom->GetNModules())) ) {
+ Error("AliPHOSv1","Can not create array of CPV modules");
+ exit(1);
+ }
+ TClonesArray &lcpvmodule = *fCPVModules;
+ for (Int_t i=0; i<fGeom->GetNModules(); i++) new(lcpvmodule[i]) AliPHOSCPVModule();
+ }
+ else {
+ // Create an empty array of AliPHOSCPVModule to satisfy
+ // AliPHOSv1::Streamer when writing root file
+
+ fCPVModules=new TClonesArray("AliPHOSCPVModule",0);
+
+ }
}
+
//____________________________________________________________________________
AliPHOSv1::AliPHOSv1(AliPHOSReconstructioner * Reconstructioner, const char *name, const char *title):
- AliPHOSv0(Reconstructioner,name,title)
-{
- fLightYieldMean = 700000.;
- fIntrinsicPINEfficiency = 0.1875 ;
- fLightYieldAttenuation = 0.0045 ;
- fRecalibrationFactor = 6.2 / fLightYieldMean ;
+ AliPHOSv0(name,title)
+{
+ // 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 ;
+
}
//____________________________________________________________________________
-AliPHOSv1::~AliPHOSv1()
+AliPHOSv1::~AliPHOSv1()
+{
+ // dtor
+
+ 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::AddHit(Int_t shunt, Int_t primary, Int_t tracknumber, 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
+
+ Int_t hitCounter ;
+ TClonesArray <mphits = *fTmpHits ;
+ AliPHOSHit *newHit ;
+ AliPHOSHit *curHit ;
+ Bool_t deja = kFALSE ;
+
+ // 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;
+
+ for ( hitCounter = 0 ; hitCounter < fNTmpHits && !deja ; hitCounter++ ) {
+ curHit = (AliPHOSHit*) ltmphits[hitCounter] ;
+ if( *curHit == *newHit ) {
+ *curHit = *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).
+
+ delete newHit;
+
+}
+
+//___________________________________________________________________________
+Int_t AliPHOSv1::Digitize(Float_t Energy)
+{
+ // Applies the energy calibration
+
+ Float_t fB = 100000000. ;
+ Float_t fA = 0. ;
+ Int_t chan = Int_t(fA + Energy*fB ) ;
+ return chan ;
+}
+
+//___________________________________________________________________________
+void AliPHOSv1::FinishEvent()
+{
+ // 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
+
+ // 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 ;
+
+ 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 ;
+ }
+ }
+ if ( !deja ) {
+ new(lDigits[fNdigits]) AliPHOSDigit(* newdigit) ;
+ fNdigits++ ;
+ }
+
+ 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) ;
+ }
+ }
+
+ fDigits->Compress() ;
+
+ fNdigits = fDigits->GetEntries() ;
+ for (i = 0 ; i < fNdigits ; i++) {
+ newdigit = (AliPHOSDigit *) fDigits->At(i) ;
+ newdigit->SetIndexInList(i) ;
+
+// fGeom->AbsToRelNumbering(newdigit->GetId(), relid) ;
+// printf("FinishEvent(): relid=(%d,%d,%d,%d) Amp=%d\n",
+// relid[0],relid[1],relid[2],relid[3], newdigit->GetAmp());
+ }
+
+}
+
+//___________________________________________________________________________
+void AliPHOSv1::MakeBranch(Option_t* opt)
+{
+ // Create new branche in the current Root Tree in the digit Tree
+ AliDetector::MakeBranch(opt) ;
+
+ 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) ;
+ }
+ }
+
+ // Create new branches CPV<i> for hits in CPV modules for IHEP geometry
+ // Yuri Kharlov, 28 September 2000.
+
+ if ( strcmp(fGeom->GetName(),"IHEP") == 0 ) {
+ for( Int_t i=0; i<fGeom->GetNModules(); i++ ) GetCPVModule(i).MakeBranch(i+1);
+ }
+
+}
+
+//_____________________________________________________________________________
+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 ;
+
+ fEmcRecPoints->Delete() ;
+
+ if ( fEmcRecPoints && gAlice->TreeR() ) {
+ sprintf(branchname,"%sEmcRP",GetName()) ;
+
+ gAlice->TreeR()->Branch(branchname, "TObjArray", &fEmcRecPoints, fBufferSize, splitlevel) ;
+ }
+
+ fPpsdRecPoints->Delete() ;
+
+
+ if ( fPpsdRecPoints && gAlice->TreeR() ) {
+ sprintf(branchname,"%sPpsdRP",GetName()) ;
+
+ gAlice->TreeR()->Branch(branchname, "TObjArray", &fPpsdRecPoints, fBufferSize, splitlevel) ;
+ }
+
+ fTrackSegments->Delete() ;
+
+ if ( fTrackSegments && gAlice->TreeR() ) {
+ sprintf(branchname,"%sTS",GetName()) ;
+ gAlice->TreeR()->Branch(branchname, &fTrackSegments, fBufferSize) ;
+ }
+
+ fRecParticles->Delete() ;
+
+ if (strcmp(fGeom->GetName(),"GPS2") == 0) {
+ if ( fRecParticles && gAlice->TreeR() ) {
+ sprintf(branchname,"%sRP",GetName()) ;
+ gAlice->TreeR()->Branch(branchname, &fRecParticles, fBufferSize) ;
+ }
+ }
+
+ // 3.
+ if (strcmp(fGeom->GetName(),"GPS2") == 0)
+ fReconstructioner->Make(fDigits, fEmcRecPoints, fPpsdRecPoints, fTrackSegments, fRecParticles);
+ else if (strcmp(fGeom->GetName(),"IHEP") == 0)
+ fReconstructioner->Make(fDigits, fEmcRecPoints, fPpsdRecPoints);
+
+ // 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() ;
+ // 5.
+
+ gAlice->TreeR()->Write(0,TObject::kOverwrite) ;
+
+ // Deleting reconstructed objects
+ ResetReconstruction();
+
}
//____________________________________________________________________________
+void AliPHOSv1::ResetHits()
+{
+ // Reset hit tree for CPV in IHEP geometry
+ // Yuri Kharlov, 28 September 2000
+ AliDetector::ResetHits();
+ if ( strcmp(fGeom->GetName(),"IHEP") == 0 ) {
+ for (Int_t i=0; i<fGeom->GetNModules(); i++) ((AliPHOSCPVModule*)(*fCPVModules)[i]) -> Clear();
+ }
+}
+//____________________________________________________________________________
+void AliPHOSv1::ResetDigits()
+{
+ // May sound strange, but cumulative hits are store in digits Tree
+ AliDetector::ResetDigits();
+ if( fTmpHits ) {
+ fTmpHits->Delete();
+ fNTmpHits = 0 ;
+ }
+}
+//____________________________________________________________________________
+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) ;
+// }
+ // Set branch address for the Hits Tree for hits in CPV modules for IHEP geometry
+ // Yuri Kharlov, 28 September 2000.
+ if ( strcmp(fGeom->GetName(),"IHEP") == 0 ) {
+ for( Int_t i=0; i<fGeom->GetNModules(); i++ ) GetCPVModule(i).SetTreeAddress(i+1);
+ }
+
+}
//____________________________________________________________________________
+
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;
- Float_t lightyield ; // Light Yield per GeV
- Float_t nElectrons ; // Number of electrons in the PIN diode
- TString name = fGeom->GetName() ;
- Float_t global[3] ;
- Float_t local[3] ;
- Float_t lostenergy ;
-
- if ( name == "GPS2" ) { // the CPV is a PPSD
- if( gMC->CurrentVolID(copy) == gMC->VolId("GCEL") )
- // if( strcmp ( gMC->CurrentVolName(), "GCEL" ) == 0 ) // We are inside a gas cell
+ Int_t absid ; // absolute cell ID number
+ Float_t xyze[4] ; // position wrt MRS and energy deposited
+ TLorentzVector pos ; // Lorentz vector of the track current position
+ Int_t copy ;
+
+ Int_t tracknumber = gAlice->CurrentTrack() ;
+ Int_t primary = gAlice->GetPrimary( gAlice->CurrentTrack() );
+ TString name = fGeom->GetName() ;
+
+ if ( name == "GPS2" ) { // ======> CPV is a GPS' 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() ;
-
+ xyze[3] = gMC->Edep() ;
if ( xyze[3] != 0 ) { // there is deposited energy
gMC->CurrentVolOffID(5, relid[0]) ; // get the PHOS Module number
// get the absolute Id number
- Int_t absid ;
- fGeom->RelToAbsNumbering(relid,absid) ;
-
+ fGeom->RelToAbsNumbering(relid, absid) ;
- AddHit(gAlice->CurrentTrack(), absid, xyze );
+ // 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") )
- // if( strcmp ( gMC->CurrentVolName(), "PXTL" ) == 0 ) { // We are inside a PWO crystal
- {
- gMC->TrackPosition(pos) ;
- xyze[0] = pos[0] ;
- xyze[1] = pos[1] ;
- xyze[2] = pos[2] ;
- lostenergy = gMC->Edep() ;
-
- global[0] = pos[0] ;
- global[1] = pos[1] ;
- global[2] = pos[2] ;
-
- if ( xyze[3] != 0 ) {
- gMC->CurrentVolOffID(10, relid[0]) ; // get the PHOS module number ;
- relid[1] = 0 ; // means PW04
- gMC->CurrentVolOffID(4, relid[2]) ; // get the row number inside the module
- gMC->CurrentVolOffID(3, relid[3]) ; // get the cell number inside the module
+ } // We are inside the gas of the CPV
+ } // GPS2 configuration
- // get the absolute Id number
+ else if ( name == "IHEP" ) { // ======> CPV is a IHEP's one
+
+ // Yuri Kharlov, 28 September 2000
+
+ if( gMC->CurrentVolID(copy) == gMC->VolId("CPVQ") &&
+ gMC->IsTrackEntering() &&
+ gMC->TrackCharge() != 0) {
+
+ // Charged track has just entered to the CPV sensitive plane
+
+ AliPHOSv1 &PHOS = *(AliPHOSv1*)gAlice->GetModule("PHOS");
+
+ Int_t ModuleNumber;
+ gMC->CurrentVolOffID(3,ModuleNumber);
+ ModuleNumber--;
+
+ // Current position of the hit in the CPV module ref. system
+
+ gMC -> TrackPosition(pos);
+ Float_t xyzm[3], xyzd[3], xyd[2];
+ for (Int_t i=0; i<3; i++) xyzm[i] = pos[i];
+ gMC -> Gmtod (xyzm, xyzd, 1); // transform coordinate from master to daughter system
+ xyd[0] = xyzd[0];
+ xyd[1] =-xyzd[2];
+
+ // Current momentum of the hit's track in the CPV module ref. system
+
+ TLorentzVector pmom;
+ gMC -> TrackMomentum(pmom);
+ Float_t pm[3], pd[3];
+ for (Int_t 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];
- Int_t absid ;
- fGeom->RelToAbsNumbering(relid,absid) ;
- gMC->Gmtod(global, local, 1) ;
-
- // calculating number of electrons in the PIN diode asociated to this hit
- lightyield = gRandom->Poisson(fLightYieldMean) ;
- nElectrons = lostenergy * lightyield * fIntrinsicPINEfficiency *
- exp(-fLightYieldAttenuation * (local[1]+fGeom->GetCrystalSize(1)/2.0 ) ) ;
-
- xyze[3] = nElectrons * fRecalibrationFactor ;
- // add current hit to the hit list
- AddHit(gAlice->CurrentTrack(), absid, xyze);
+ // Current particle type of the hit's track
+
+ Int_t ipart = gMC->TrackPid();
+
+ // Add the current particle in the list of the CPV hits.
+
+ PHOS.GetCPVModule(ModuleNumber).AddHit(pmom,xyd,ipart);
+
+ printf("CPV hit added to module #%2d: p = (% .4f, % .4f, % .4f, % .4f) GeV,\n",
+ ModuleNumber,pmom.Px(),pmom.Py(),pmom.Pz(),pmom.E());
+ printf( " xy = (%8.4f, %8.4f) cm, ipart = %d\n",
+ xyd[0],xyd[1],ipart);
+
+ // Digitize the current CPV hit:
+
+ // 1. find pad response and
+
+ TClonesArray *cpvDigits = new TClonesArray("AliPHOSCPVDigit",0); // array of digits for current hit
+ CPVDigitize(pmom,xyd,ModuleNumber,cpvDigits);
+
+ Float_t xmean = 0;
+ Float_t zmean = 0;
+ Float_t qsum = 0;
+ Int_t ndigits;
+
+ // 2. go through the current digit list and sum digits in pads
+
+ ndigits = cpvDigits->GetEntriesFast();
+ for (Int_t idigit=0; idigit<ndigits-1; idigit++) {
+ AliPHOSCPVDigit *cpvDigit1 = (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 = (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) ;
+ }
+ }
+ }
+ cpvDigits->Compress() ;
+
+ // 3. add digits to temporary hit list fTmpHits
+
+ ndigits = cpvDigits->GetEntriesFast();
+ for (Int_t idigit=0; idigit<ndigits; idigit++) {
+ AliPHOSCPVDigit *cpvDigit = (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
+ fGeom->RelToAbsNumbering(relid, absid) ;
+
+ // add current digit to the temporary hit list
+ xyze[0] = 0. ;
+ xyze[1] = 0. ;
+ xyze[2] = 0. ;
+ xyze[3] = cpvDigit->GetQpad() ; // amplitude in a pad
+ primary = -1; // No need in primary for CPV
+ AddHit(fIshunt, primary, tracknumber, absid, xyze);
+
+ if (cpvDigit->GetQpad() > 0.02) {
+ xmean += cpvDigit->GetQpad() * (cpvDigit->GetXpad() + 0.5);
+ zmean += cpvDigit->GetQpad() * (cpvDigit->GetYpad() + 0.5);
+ qsum += cpvDigit->GetQpad();
+ }
+ }
+ delete cpvDigits;
+ }
+ } // end of IHEP 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() ;
- } // there is deposited energy
- } // we are inside a PHOS Xtal
+ 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
+
+ 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
+}
+
+//____________________________________________________________________________
+void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, Int_t moduleNumber, 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 celWr = fGeom->GetPadSizePhi()/2; // Distance between wires (2 wires above 1 pad)
+ const Float_t detR = 0.1; // Relative energy fluctuation in track for 100 e-
+ const Float_t dEdx = 4.0; // Average energy loss in CPV;
+ const Int_t ngamz = 5; // Ionization size in Z
+ const Int_t ngamx = 9; // Ionization size in Phi
+ const Float_t qNoise = 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
+
+// cout << __PRETTY_FUNCTION__ << ": YVK : Start digitization\n";
+
+ 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 E = dEdx;
+
+// cout << "CPVDigitize: YVK : "<<hitX<<" "<<hitZ<<" | "<<pX<<" "<<pZ<<" "<<pNorm<<endl;
+
+ Float_t dZY = pZ/pNorm * fGeom->GetCPVGasThickness();
+ Float_t dXY = pX/pNorm * fGeom->GetCPVGasThickness();
+ gRandom->Rannor(rnor1,rnor2);
+ E *= (1 + detR*rnor1) *
+ TMath::Sqrt((1 + ( pow(dZY,2) + pow(dXY,2) ) / pow(fGeom->GetCPVGasThickness(),2)));
+ Float_t zhit1 = hitZ + fGeom->GetCPVActiveSize(1)/2 - dZY/2;
+ Float_t xhit1 = hitX + fGeom->GetCPVActiveSize(0)/2 - dXY/2;
+ Float_t zhit2 = zhit1 + dZY;
+ Float_t xhit2 = xhit1 + dXY;
+
+// cout << "CPVDigitize: YVK : "<<xhit1<<" "<<xhit2<<" | "<<zhit1<<" "<<zhit2<<" | "
+// << (Int_t)(xhit1/fGeom->GetPadSizePhi())<<" "<<(Int_t)(zhit1/fGeom->GetPadSizeZ())<<" "<<endl;
+
+ Int_t iwht1 = (Int_t) (xhit1 / celWr); // wire (x) coordinate "in"
+ Int_t iwht2 = (Int_t) (xhit2 / celWr); // 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) * celWr;
+ zxe[2][0] = E/2;
+ zxe[0][1] = (zhit1 + zhit2 + dZY*0.57735) / 2;
+ zxe[1][1] = (iwht1 + 0.5) * celWr;
+ zxe[2][1] = E/2;
+ }
+ 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) * celWr; // wire 1
+ Float_t xwht2 = (iwht2 + 0.5) * celWr; // wire 2
+ Float_t xwht3 = (iwht3 + 0.5) * celWr; // 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) + celWr );
+ Float_t egm2 = TMath::Abs(dxw2) / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + celWr );
+ Float_t egm3 = celWr / ( TMath::Abs(dxw1) + TMath::Abs(dxw2) + celWr );
+ zxe[0][0] = (dXY*(xwr13-xwht1)/dXY + zhit1 + zhit1) / 2;
+ zxe[1][0] = xwht1;
+ zxe[2][0] = E * egm1;
+ zxe[0][1] = (dXY*(xwr23-xwht1)/dXY + zhit1 + zhit2) / 2;
+ zxe[1][1] = xwht2;
+ zxe[2][1] = E * egm2;
+ zxe[0][2] = dXY*(xwht3-xwht1)/dXY + zhit1;
+ zxe[1][2] = xwht3;
+ zxe[2][2] = E * egm3;
+ }
+ else { // incline 2-wire hit
+ nIter = 2;
+ Float_t xwht1 = (iwht1 + 0.5) * celWr;
+ Float_t xwht2 = (iwht2 + 0.5) * celWr;
+ 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] = E * egm1;
+ zxe[0][1] = (zhit1 + zhit2 + dZY*egm2) / 2;
+ zxe[1][1] = xwht2;
+ zxe[2][1] = E * egm2;
+ }
+
+ // Finite size of ionization region
+
+ Int_t nCellZ = fGeom->GetNumberOfPadsZ();
+ Int_t nCellX = fGeom->GetNumberOfPadsPhi();
+ Int_t nz3 = (ngamz+1)/2;
+ Int_t nx3 = (ngamx+1)/2;
+ cpvDigits->Expand(nIter*ngamx*ngamz);
+ TClonesArray &ldigits = *(TClonesArray *)cpvDigits;
+
+ for (Int_t iter=0; iter<nIter; iter++) {
+// cout << "CPVDigitize: YVK : iter="<<iter<<endl;
+
+ Float_t zhit = zxe[0][iter];
+ Float_t xhit = zxe[1][iter];
+ Float_t qhit = zxe[2][iter];
+ Float_t zcell = zhit / fGeom->GetPadSizeZ();
+ Float_t xcell = xhit / fGeom->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<=ngamz; 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<=ngamx; 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 += qNoise*rnor2;
+ if (qpad<0) continue;
+
+ // Fill the array with pad response ID and amplitude
+ new(ldigits[cpvDigits->GetEntriesFast()]) AliPHOSCPVDigit(kxg,kzg,qpad);
+// printf("(%2d,%2d,%5.3f) ",kxg,kzg,qpad);
+ }
+// cout << endl;
+ }
+// cout << endl;
+ }
}
+//____________________________________________________________________________
+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 = fGeom->GetPadSizeZ() / 2;
+ Double_t dx = fGeom->GetPadSizePhi() / 2;
+ Double_t z = zhit * fGeom->GetPadSizeZ();
+ Double_t x = xhit * fGeom->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;
+}
+
+//____________________________________________________________________________
+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 a=1.0;
+ const Double_t b=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) * b;
+ cumulPRF += TMath::Power(-1,i) * TMath::ATan( xy / (b1*TMath::Sqrt(b1*b1 + r2)) );
+ }
+ cumulPRF *= a/(2*TMath::Pi());
+ return cumulPRF;
+}
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