-/////////////////////////////////////////////////////////
-// Manager and hits classes for set:PHOS version 1 //
-/////////////////////////////////////////////////////////
-
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * *
+ * Author: The ALICE Off-line Project. *
+ * Contributors are mentioned in the code where appropriate. *
+ * *
+ * Permission to use, copy, modify and distribute this software and its *
+ * documentation strictly for non-commercial purposes is hereby granted *
+ * without fee, provided that the above copyright notice appears in all *
+ * copies and that both the copyright notice and this permission notice *
+ * appear in the supporting documentation. The authors make no claims *
+ * about the suitability of this software for any purpose. It is *
+ * provided "as is" without express or implied warranty. *
+ **************************************************************************/
+
+/* $Id$ */
+
+/* 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 + CPV has name IHEP:
+// Produces hits for CPV, cumulated hits
+//---
+//---
+//*-- Author: Yves Schutz (SUBATECH)
+
+
// --- ROOT system ---
-#include "TH1.h"
-#include "TRandom.h"
-#include "TFile.h"
-#include "TTree.h"
-#include "TMath.h"
+#include <TParticle.h>
+#include <TVirtualMC.h>
+
+// --- Standard library ---
-// --- galice header files ---
+
+// --- AliRoot header files ---
+#include "AliPHOSCPVDigit.h"
+#include "AliPHOSGeometry.h"
+#include "AliPHOSHit.h"
#include "AliPHOSv1.h"
#include "AliRun.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.)
{
+ //Def ctor.
}
-
-//______________________________________________________________________________
-AliPHOSv1::AliPHOSv1(const char *name, const char *title)
- : AliPHOS(name, title)
+//____________________________________________________________________________
+AliPHOSv1::AliPHOSv1(const char *name, const char *title):
+ AliPHOSv0(name,title),
+ fLightYieldMean(0.),
+ fIntrinsicPINEfficiency(0.),
+ fLightYieldAttenuation(0.),
+ fRecalibrationFactor(0.),
+ fElectronsPerGeV(0.),
+ fAPDGain(0.),
+ fLightFactor(0.),
+ fAPDFactor(0.)
{
+ //
+ // 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).
+ //
+
+
+
+ // 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() ).
+
+ 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 ;
}
-
-//___________________________________________
-void AliPHOSv1::CreateGeometry()
-{
-
- AliPHOS *PHOS_tmp = (AliPHOS*)gAlice->GetModule("PHOS");
- if( NULL==PHOS_tmp )
- {
- printf("There isn't PHOS detector!\n");
- return;
- }
-// AliPHOS &PHOS = *PHOS_tmp;
-
- //////////////////////////////////////////////////////////////////////////////
-
- Int_t rotation_matrix_number=0;
- Float_t par[11],
- x,y,z;
-
- const float cell_length = GetCrystalLength()+GetAirThickness()+GetWrapThickness()+GetPIN_Length(),
- cell_side_size = GetCrystalSideSize()+2*GetAirThickness()+2*GetWrapThickness(),
- cradle_thikness = cell_length;
-
- //////////////////////////////////////////////////////////////////////////////
- // CELL volume and subvolumes creation
- //////////////////////////////////////////////////////////////////////////////
-
- par[0] = GetCrystalSideSize()/2 + GetWrapThickness();
- par[1] = GetCrystalSideSize()/2 + GetWrapThickness();
- par[2] = GetCrystalLength() /2 + GetWrapThickness()/2;
- gMC->Gsvolu("WRAP","BOX ",GetPHOS_IDTMED_Tyvek(),par,3);
-
- par[0] = GetCrystalSideSize()/2;
- par[1] = GetCrystalSideSize()/2;
- par[2] = GetCrystalLength()/2;
- gMC->Gsvolu("CRST","BOX ",GetPHOS_IDTMED_PbWO4(),par,3);
-
- // PIN
- par[0] = GetPIN_SideSize()/2;
- par[1] = GetPIN_SideSize()/2;
- par[2] = GetPIN_Length()/2;
- gMC->Gsvolu("PIN ","BOX ",GetPHOS_IDTMED_PIN(),par,3);
-
- //////////////////////////////////////////////////////////////////////////////
- // CRADLE creation.
- //////////////////////////////////////////////////////////////////////////////
-
- par[0] = cell_side_size/2 * GetNz();
- par[1] = cell_side_size/2 * GetNphi();
- par[2] = cradle_thikness/2;
- gMC->Gsvolu("PHOS","BOX ",GetPHOS_IDTMED_AIR(),par,3);
-
-
- par[0] = cell_side_size/2 * GetNz();
- par[1] = cell_side_size/2 * GetNphi();
- par[2] = cell_length/2;
- gMC->Gsvolu("CRS0","BOX ",GetPHOS_IDTMED_AIR(),par,3);
-
- x = 0;
- y = 0;
- z = -(cradle_thikness-cell_length)/2;
- gMC->Gspos("CRS0",1,"PHOS",x,y,z,0,"ONLY");
-
- gMC->Gsdvn("CRS1","CRS0",GetNphi(),2);
- gMC->Gsdvn("CELL","CRS1",GetNz() ,1);
-
- //////////////////////////////////////////////////////////////////////////////
- // CELL creation
- //////////////////////////////////////////////////////////////////////////////
- x = 0;
- y = 0;
- z = -GetWrapThickness()/2;
- gMC->Gspos("CRST",1,"WRAP",x,y,z,0,"ONLY");
-
- x = 0;
- y = 0;
- z = GetPIN_Length()/2;
- gMC->Gspos("WRAP",1,"CELL",x,y,z,0,"ONLY");
-
- x = 0;
- y = 0;
- z = -GetCrystalLength()/2-GetWrapThickness()/2;
- gMC->Gspos("PIN ",1,"CELL",x,y,z,0,"ONLY");
-
- //////////////////////////////////////////////////////////////////////////////
- // CELL has been created.
- //////////////////////////////////////////////////////////////////////////////
+AliPHOSv1::AliPHOSv1(AliPHOSv1 & phos) :
+ AliPHOSv0(phos),
+ fLightYieldMean(0.),
+ fIntrinsicPINEfficiency(0.),
+ fLightYieldAttenuation(0.),
+ fRecalibrationFactor(0.),
+ fElectronsPerGeV(0.),
+ fAPDGain(0.),
+ fLightFactor(0.),
+ fAPDFactor(0.)
+{
+ //Copy ctor. Can be wrong.
+ phos.Copy(*this) ;
+}
- //////////////////////////////////////////////////////////////////////////////
- // End of CRADLE creation.
- //////////////////////////////////////////////////////////////////////////////
+//____________________________________________________________________________
+AliPHOSv1::~AliPHOSv1()
+{
+ // dtor
+ if ( fHits) {
+ fHits->Delete() ;
+ delete fHits ;
+ fHits = 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 ;
+}
- //////////////////////////////////////////////////////////////////////////////
- // PHOS creation
- //////////////////////////////////////////////////////////////////////////////
+//____________________________________________________________________________
+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 from one primary and within some time gate
+
+ Int_t hitCounter ;
+ AliPHOSHit *newHit ;
+ AliPHOSHit *curHit ;
+ Bool_t deja = kFALSE ;
+ AliPHOSGeometry * geom = GetGeometry() ;
+
+ newHit = new AliPHOSHit(shunt, primary, Id, hits) ;
+
+ 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((*fHits)[fNhits]) AliPHOSHit(*newHit) ;
+ // get the block Id number
+ Int_t relid[4] ;
+ geom->AbsToRelNumbering(Id, relid) ;
+
+ fNhits++ ;
+ }
+
+ delete newHit;
+}
- for( int i=0; i<GetCradlesAmount(); i++ )
- {
- Float_t cradle_angle = 27.,
- cradle_angle_pos = -90+(i-(GetCradlesAmount()-1)/2.) *
- (cradle_angle+GetAngleBetweenCradles());
- // Cradles are numerated in clock reversed order. (general way of angle increment)
+//____________________________________________________________________________
+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
- Float_t r = GetRadius() + cradle_thikness/2;
- x = r*cos(cradle_angle_pos*kPI/180);
- y = r*sin(cradle_angle_pos*kPI/180);
- z = 0;
- AliMatrix(rotation_matrix_number, 0,0 , 90,90+cradle_angle_pos , 90,180+cradle_angle_pos);
- gMC->Gspos("PHOS",i+1,"ALIC",x,y,z,rotation_matrix_number,"ONLY");
+}
- GetCradleAngle(i) = cradle_angle_pos;
+//____________________________________________________________________________
+void AliPHOSv1::FinishEvent()
+{
+ // 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
+
+ AliDetector::FinishEvent();
+}
+//____________________________________________________________________________
+void AliPHOSv1::StepManager(void)
+{
+ // Accumulates hits as long as the track stays in a single crystal or CPV gas Cell
+
+ 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 ;
+
+ 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) ;
+ }
+ }
+ }
+ 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();
+ }
+ }
+ if (cpvDigits) {
+ cpvDigits->Delete();
+ delete cpvDigits;
+ cpvDigits=0;
+ }
}
- AddPHOSCradles();
- //////////////////////////////////////////////////////////////////////////////
- // All is done.
- // Print some information.
- //////////////////////////////////////////////////////////////////////////////
+
+ 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
+
}
-void AliPHOSv1::StepManager()
+//____________________________________________________________________________
+void AliPHOSv1::CPVDigitize (TLorentzVector p, Float_t *zxhit, TClonesArray *cpvDigits)
{
- static Bool_t inwold=0; // Status of previous ctrak->inwvol
- Int_t copy;
-
- int cradle_number, cell_Z, cell_Phi; // Variables that describe cell position.
-
- if( gMC->GetMedium() == GetPHOS_IDTMED_PIN() && (gMC->IsTrackInside() || gMC->IsTrackExiting()==2) && inwold && gMC->TrackCharge()!=0 )
- {
- // GEANT particle just have entered into PIN diode.
-
- AliPHOS &PHOS = *(AliPHOS*)gAlice->GetModule("PHOS");
-
- gMC->CurrentVolOffID(4,copy);
- cradle_number = copy-1;
- gMC->CurrentVolOffID(1,copy);
- cell_Z = copy-1;
- gMC->CurrentVolOffID(2,copy);
- cell_Phi = copy-1;
-/*
- cradle_number = cvolu->number[cvolu->nlevel-5]-1;
- cell_Z = cvolu->number[cvolu->nlevel-2]-1;
- cell_Phi = cvolu->number[cvolu->nlevel-3]-1;
-*/
-
- TH2S &h = PHOS.GetCradle(cradle_number).fChargedTracksInPIN;
- h.AddBinContent(h.GetBin(cell_Z,cell_Phi));
+ // ------------------------------------------------------------------------
+ // 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( gMC->GetMedium() == GetPHOS_IDTMED_PbWO4() )
- {
- // GEANT particle into crystal.
-
- AliPHOS &PHOS = *(AliPHOS*)gAlice->GetModule("PHOS");
-
- gMC->CurrentVolOffID(5,copy);
- cradle_number = copy-1;
- gMC->CurrentVolOffID(2,copy);
- cell_Z = copy-1;
- gMC->CurrentVolOffID(3,copy);
- cell_Phi = copy-1;
-/*
- cradle_number = cvolu->number[cvolu->nlevel-6]-1;
- cell_Z = cvolu->number[cvolu->nlevel-3]-1;
- cell_Phi = cvolu->number[cvolu->nlevel-4]-1;
-*/
- TH2F &h = PHOS.GetCradle(cradle_number).fCellEnergy;
- h.AddBinContent(h.GetBin(cell_Z,cell_Phi),gMC->Edep());
+ 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;
+ }
+ 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;
}
- //////////////////////////////////////////////////////////////////////////////
+ // 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);
+ }
+ }
+ }
+}
+//____________________________________________________________________________
+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;
+}
- inwold=gMC->IsTrackEntering(); // Save current status of GEANT variable.
+//____________________________________________________________________________
+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