/* $Id$ */
-///////////////////////////////////////////////////////////////////////////////
-// //
-// Transition Radiation Detector version 1 -- slow simulator //
-// //
-//Begin_Html
-/*
-<img src="picts/AliTRDfullClass.gif">
-*/
-//End_Html
-// //
-// //
-///////////////////////////////////////////////////////////////////////////////
-
-#include <stdlib.h>
-
-#include <TF1.h>
+////////////////////////////////////////////////////////////////////////////
+// //
+// Transition Radiation Detector version 1 -- slow simulator //
+// //
+////////////////////////////////////////////////////////////////////////////
+
#include <TLorentzVector.h>
#include <TMath.h>
#include <TRandom.h>
-#include <TVector.h>
#include <TVirtualMC.h>
+#include <TGeoManager.h>
+#include <TGeoMatrix.h>
+#include <TGeoPhysicalNode.h>
-#include "AliConst.h"
-#include "AliLog.h"
+#include "AliTrackReference.h"
#include "AliMC.h"
#include "AliRun.h"
+#include "AliGeomManager.h"
+
#include "AliTRDgeometry.h"
-#include "AliTRDhit.h"
-#include "AliTRDsim.h"
+#include "AliTRDCommonParam.h"
+#include "AliTRDsimTR.h"
#include "AliTRDv1.h"
ClassImp(AliTRDv1)
//_____________________________________________________________________________
-AliTRDv1::AliTRDv1():AliTRD()
+AliTRDv1::AliTRDv1()
+ :AliTRD()
+ ,fTRon(kTRUE)
+ ,fTR(NULL)
+ ,fStepSize(0)
+ ,fWion(0)
{
//
// Default constructor
//
- fSensSelect = 0;
- fSensPlane = -1;
- fSensChamber = -1;
- fSensSector = -1;
- fSensSectorRange = 0;
-
- fDeltaE = NULL;
- fDeltaG = NULL;
- fTR = NULL;
-
- fStepSize = 0.1;
- fTypeOfStepManager = 1;
-
}
//_____________________________________________________________________________
AliTRDv1::AliTRDv1(const char *name, const char *title)
- :AliTRD(name, title)
+ :AliTRD(name,title)
+ ,fTRon(kTRUE)
+ ,fTR(NULL)
+ ,fStepSize(0.1)
+ ,fWion(0)
{
//
// Standard constructor for Transition Radiation Detector version 1
//
- fSensSelect = 0;
- fSensPlane = -1;
- fSensChamber = -1;
- fSensSector = -1;
- fSensSectorRange = 0;
-
- fDeltaE = NULL;
- fDeltaG = NULL;
- fTR = NULL;
- fStepSize = 0.1;
- fTypeOfStepManager = 1;
-
SetBufferSize(128000);
-}
-
-//_____________________________________________________________________________
-AliTRDv1::AliTRDv1(const AliTRDv1 &trd):AliTRD(trd)
-{
- //
- // Copy constructor
- //
-
- ((AliTRDv1 &) trd).Copy(*this);
+ if (AliTRDCommonParam::Instance()->IsXenon()) {
+ fWion = 23.53; // Ionization energy XeCO2 (85/15)
+ }
+ else if (AliTRDCommonParam::Instance()->IsArgon()) {
+ fWion = 27.21; // Ionization energy ArCO2 (82/18)
+ }
+ else {
+ AliFatal("Wrong gas mixture");
+ exit(1);
+ }
}
// AliTRDv1 destructor
//
- if (fDeltaE) delete fDeltaE;
- if (fDeltaG) delete fDeltaG;
- if (fTR) delete fTR;
+ if (fTR) {
+ delete fTR;
+ fTR = 0;
+ }
}
//_____________________________________________________________________________
-AliTRDv1 &AliTRDv1::operator=(const AliTRDv1 &trd)
+void AliTRDv1::AddAlignableVolumes() const
{
//
- // Assignment operator
+ // Create entries for alignable volumes associating the symbolic volume
+ // name with the corresponding volume path. Needs to be syncronized with
+ // eventual changes in the geometry.
//
- if (this != &trd) ((AliTRDv1 &) trd).Copy(*this);
- return *this;
+ TString volPath;
+ TString symName;
+
+ TString vpStr = "ALIC_1/B077_1/BSEGMO";
+ TString vpApp1 = "_1/BTRD";
+ TString vpApp2 = "_1";
+ TString vpApp3a = "/UTR1_1/UTS1_1/UTI1_1/UT";
+ TString vpApp3b = "/UTR2_1/UTS2_1/UTI2_1/UT";
+ TString vpApp3c = "/UTR3_1/UTS3_1/UTI3_1/UT";
+
+ TString snStr = "TRD/sm";
+ TString snApp1 = "/st";
+ TString snApp2 = "/pl";
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::Copy(TObject &trd) const
-{
- printf("void AliTRDv1::Copy(TObject &trd) const\n");
//
- // Copy function
+ // The super modules
+ // The symbolic names are: TRD/sm00
+ // ...
+ // TRD/sm17
//
+ for (Int_t isector = 0; isector < AliTRDgeometry::Nsector(); isector++) {
+
+ volPath = vpStr;
+ volPath += isector;
+ volPath += vpApp1;
+ volPath += isector;
+ volPath += vpApp2;
+
+ symName = snStr;
+ symName += Form("%02d",isector);
+
+ gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data());
- ((AliTRDv1 &) trd).fSensSelect = fSensSelect;
- ((AliTRDv1 &) trd).fSensPlane = fSensPlane;
- ((AliTRDv1 &) trd).fSensChamber = fSensChamber;
- ((AliTRDv1 &) trd).fSensSector = fSensSector;
- ((AliTRDv1 &) trd).fSensSectorRange = fSensSectorRange;
+ }
- ((AliTRDv1 &) trd).fTypeOfStepManager = fTypeOfStepManager;
- ((AliTRDv1 &) trd).fStepSize = fStepSize;
+ //
+ // The readout chambers
+ // The symbolic names are: TRD/sm00/st0/pl0
+ // ...
+ // TRD/sm17/st4/pl5
+ //
+ AliGeomManager::ELayerID idTRD1 = AliGeomManager::kTRD1;
+ Int_t layer, modUID;
+
+ for (Int_t isector = 0; isector < AliTRDgeometry::Nsector(); isector++) {
+
+ if (fGeometry->GetSMstatus(isector) == 0) continue;
+
+ for (Int_t istack = 0; istack < AliTRDgeometry::Nstack(); istack++) {
+ for (Int_t ilayer = 0; ilayer < AliTRDgeometry::Nlayer(); ilayer++) {
+
+ layer = idTRD1 + ilayer;
+ modUID = AliGeomManager::LayerToVolUIDSafe(layer,isector*5+istack);
+
+ Int_t idet = AliTRDgeometry::GetDetectorSec(ilayer,istack);
+
+ volPath = vpStr;
+ volPath += isector;
+ volPath += vpApp1;
+ volPath += isector;
+ volPath += vpApp2;
+ switch (isector) {
+ case 13:
+ case 14:
+ case 15:
+ if (istack == 2) {
+ continue;
+ }
+ volPath += vpApp3c;
+ break;
+ case 11:
+ case 12:
+ volPath += vpApp3b;
+ break;
+ default:
+ volPath += vpApp3a;
+ };
+ volPath += Form("%02d",idet);
+ volPath += vpApp2;
+
+ symName = snStr;
+ symName += Form("%02d",isector);
+ symName += snApp1;
+ symName += istack;
+ symName += snApp2;
+ symName += ilayer;
+
+ TGeoPNEntry *alignableEntry =
+ gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data(),modUID);
+
+ // Add the tracking to local matrix following the TPC example
+ if (alignableEntry) {
+ TGeoHMatrix *globMatrix = alignableEntry->GetGlobalOrig();
+ Double_t sectorAngle = 20.0 * (isector % 18) + 10.0;
+ TGeoHMatrix *t2lMatrix = new TGeoHMatrix();
+ t2lMatrix->RotateZ(sectorAngle);
+ t2lMatrix->MultiplyLeft(&(globMatrix->Inverse()));
+ alignableEntry->SetMatrix(t2lMatrix);
+ }
+ else {
+ AliError(Form("Alignable entry %s is not valid!",symName.Data()));
+ }
- fDeltaE->Copy(*((AliTRDv1 &) trd).fDeltaE);
- fDeltaG->Copy(*((AliTRDv1 &) trd).fDeltaG);
- fTR->Copy(*((AliTRDv1 &) trd).fTR);
+ }
+ }
+ }
}
// Check that FRAME is there otherwise we have no place where to put the TRD
AliModule* frame = gAlice->GetModule("FRAME");
- if (!frame) return;
+ if (!frame) {
+ AliError("TRD needs FRAME to be present\n");
+ return;
+ }
// Define the chambers
AliTRD::CreateGeometry();
// volume.
//
- // PDG code electron
- const Int_t kPdgElectron = 11;
-
- // Ionization energy
- const Float_t kWion = 23.53;
-
// Maximum number of TR photons per track
const Int_t kNTR = 50;
- TLorentzVector mom, pos;
-
- // Create TR at the entrance of the chamber
- if (gMC->IsTrackEntering()) {
+ TLorentzVector mom;
+ TLorentzVector pos;
- // Create TR only for electrons
- Int_t iPdg = gMC->TrackPid();
- if (TMath::Abs(iPdg) != kPdgElectron) return;
+ Float_t eTR[kNTR];
+ Int_t nTR;
- Float_t eTR[kNTR];
- Int_t nTR;
-
- // Create TR photons
- gMC->TrackMomentum(mom);
- Float_t pTot = mom.Rho();
- fTR->CreatePhotons(iPdg,pTot,nTR,eTR);
- if (nTR > kNTR) {
- AliFatal(Form("Boundary error: nTR = %d, kNTR = %d",nTR,kNTR));
- }
+ // Create TR photons
+ gMC->TrackMomentum(mom);
+ Float_t pTot = mom.Rho();
+ fTR->CreatePhotons(11,pTot,nTR,eTR);
+ if (nTR > kNTR) {
+ AliFatal(Form("Boundary error: nTR = %d, kNTR = %d",nTR,kNTR));
+ }
- // Loop through the TR photons
- for (Int_t iTR = 0; iTR < nTR; iTR++) {
+ // Loop through the TR photons
+ for (Int_t iTR = 0; iTR < nTR; iTR++) {
- Float_t energyMeV = eTR[iTR] * 0.001;
- Float_t energyeV = eTR[iTR] * 1000.0;
- Float_t absLength = 0;
- Float_t sigma = 0;
+ Float_t energyMeV = eTR[iTR] * 0.001;
+ Float_t energyeV = eTR[iTR] * 1000.0;
+ Float_t absLength = 0.0;
+ Float_t sigma = 0.0;
- // Take the absorbtion in the entrance window into account
- Double_t muMy = fTR->GetMuMy(energyMeV);
- sigma = muMy * fFoilDensity;
- if (sigma > 0.0) {
- absLength = gRandom->Exp(1.0/sigma);
- if (absLength < AliTRDgeometry::MyThick()) continue;
- }
- else {
+ // Take the absorbtion in the entrance window into account
+ Double_t muMy = fTR->GetMuMy(energyMeV);
+ sigma = muMy * fFoilDensity;
+ if (sigma > 0.0) {
+ absLength = gRandom->Exp(1.0/sigma);
+ if (absLength < AliTRDgeometry::MyThick()) {
continue;
}
+ }
+ else {
+ continue;
+ }
- // The absorbtion cross sections in the drift gas
- // Gas-mixture (Xe/CO2)
- Double_t muXe = fTR->GetMuXe(energyMeV);
- Double_t muCO = fTR->GetMuCO(energyMeV);
- sigma = (0.85 * muXe + 0.15 * muCO) * fGasDensity * fTR->GetTemp();
-
- // The distance after which the energy of the TR photon
- // is deposited.
- if (sigma > 0.0) {
- absLength = gRandom->Exp(1.0/sigma);
- if (absLength > (AliTRDgeometry::DrThick()
- + AliTRDgeometry::AmThick())) {
- continue;
- }
- }
- else {
+ // The absorbtion cross sections in the drift gas
+ // Gas-mixture (Xe/CO2)
+ Double_t muNo = 0.0;
+ if (AliTRDCommonParam::Instance()->IsXenon()) {
+ muNo = fTR->GetMuXe(energyMeV);
+ }
+ else if (AliTRDCommonParam::Instance()->IsArgon()) {
+ muNo = fTR->GetMuAr(energyMeV);
+ }
+ Double_t muCO = fTR->GetMuCO(energyMeV);
+ sigma = (fGasNobleFraction * muNo + (1.0 - fGasNobleFraction) * muCO)
+ * fGasDensity
+ * fTR->GetTemp();
+
+ // The distance after which the energy of the TR photon
+ // is deposited.
+ if (sigma > 0.0) {
+ absLength = gRandom->Exp(1.0/sigma);
+ if (absLength > (AliTRDgeometry::DrThick()
+ + AliTRDgeometry::AmThick())) {
continue;
}
-
- // The position of the absorbtion
- Float_t posHit[3];
- gMC->TrackPosition(pos);
- posHit[0] = pos[0] + mom[0] / pTot * absLength;
- posHit[1] = pos[1] + mom[1] / pTot * absLength;
- posHit[2] = pos[2] + mom[2] / pTot * absLength;
-
- // Create the charge
- Int_t q = ((Int_t) (energyeV / kWion));
-
- // Add the hit to the array. TR photon hits are marked
- // by negative charge
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),det,posHit,-q,kTRUE);
-
+ }
+ else {
+ continue;
}
+ // The position of the absorbtion
+ Float_t posHit[3];
+ gMC->TrackPosition(pos);
+ posHit[0] = pos[0] + mom[0] / pTot * absLength;
+ posHit[1] = pos[1] + mom[1] / pTot * absLength;
+ posHit[2] = pos[2] + mom[2] / pTot * absLength;
+
+ // Create the charge
+ Int_t q = ((Int_t) (energyeV / fWion));
+
+ // Add the hit to the array. TR photon hits are marked
+ // by negative charge
+ AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber()
+ ,det
+ ,posHit
+ ,-q
+ ,gMC->TrackTime()*1.0e06
+ ,kTRUE);
+
}
}
AliTRD::Init();
AliDebug(1,"Slow simulator\n");
- if (fSensSelect) {
- if (fSensPlane >= 0)
- AliInfo(Form("Only plane %d is sensitive"));
- if (fSensChamber >= 0)
- AliInfo(Form("Only chamber %d is sensitive",fSensChamber));
- if (fSensSector >= 0) {
- Int_t sens1 = fSensSector;
- Int_t sens2 = fSensSector + fSensSectorRange;
- sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect()))
- * AliTRDgeometry::Nsect();
- AliInfo(Form("Only sectors %d - %d are sensitive\n",sens1,sens2-1));
- }
- }
- if (fTR)
- AliInfo("TR simulation on")
- else
- AliInfo("TR simulation off");
-
- // First ionization potential (eV) for the gas mixture (90% Xe + 10% CO2)
- const Float_t kPoti = 12.1;
- // Maximum energy (50 keV);
- const Float_t kEend = 50000.0;
- // Ermilova distribution for the delta-ray spectrum
- Float_t poti = TMath::Log(kPoti);
- Float_t eEnd = TMath::Log(kEend);
-
- // Ermilova distribution for the delta-ray spectrum
- fDeltaE = new TF1("deltae" ,Ermilova ,poti,eEnd,0);
-
- // Geant3 distribution for the delta-ray spectrum
- fDeltaG = new TF1("deltag",IntSpecGeant,2.421257,28.536469,0);
-
- AliDebug(1,"+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++");
-
-}
-
-//_____________________________________________________________________________
-AliTRDsim *AliTRDv1::CreateTR()
-{
- //
- // Enables the simulation of TR
- //
-
- fTR = new AliTRDsim();
- return fTR;
-
-}
-//_____________________________________________________________________________
-void AliTRDv1::SetSensPlane(Int_t iplane)
-{
- //
- // Defines the hit-sensitive plane (0-5)
- //
-
- if ((iplane < 0) || (iplane > 5)) {
- AliWarning(Form("Wrong input value:%d",iplane));
- AliWarning("Use standard setting");
- fSensPlane = -1;
- fSensSelect = 0;
- return;
- }
-
- fSensSelect = 1;
- fSensPlane = iplane;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::SetSensChamber(Int_t ichamber)
-{
- //
- // Defines the hit-sensitive chamber (0-4)
- //
-
- if ((ichamber < 0) || (ichamber > 4)) {
- AliWarning(Form("Wrong input value: %d",ichamber));
- AliWarning("Use standard setting");
- fSensChamber = -1;
- fSensSelect = 0;
- return;
- }
-
- fSensSelect = 1;
- fSensChamber = ichamber;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::SetSensSector(Int_t isector)
-{
- //
- // Defines the hit-sensitive sector (0-17)
- //
-
- SetSensSector(isector,1);
-
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::SetSensSector(Int_t isector, Int_t nsector)
-{
- //
- // Defines a range of hit-sensitive sectors. The range is defined by
- // <isector> (0-17) as the starting point and <nsector> as the number
- // of sectors to be included.
- //
-
- if ((isector < 0) || (isector > 17)) {
- AliWarning(Form("Wrong input value <isector>: %d",isector));
- AliWarning("Use standard setting");
- fSensSector = -1;
- fSensSectorRange = 0;
- fSensSelect = 0;
- return;
+ // Switch on TR simulation as default
+ if (!fTRon) {
+ AliInfo("TR simulation off");
}
-
- if ((nsector < 1) || (nsector > 18)) {
- AliWarning(Form("Wrong input value <nsector>: %d",nsector));
- AliWarning("Use standard setting");
- fSensSector = -1;
- fSensSectorRange = 0;
- fSensSelect = 0;
- return;
+ else {
+ fTR = new AliTRDsimTR();
}
- fSensSelect = 1;
- fSensSector = isector;
- fSensSectorRange = nsector;
+ AliDebug(1,"+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++");
}
//_____________________________________________________________________________
void AliTRDv1::StepManager()
-{
- //
- // Slow simulator. Every charged track produces electron cluster as hits
- // along its path across the drift volume.
- //
-
- switch (fTypeOfStepManager) {
- case 0 : StepManagerErmilova(); break; // 0 is Ermilova
- case 1 : StepManagerGeant(); break; // 1 is Geant
- case 2 : StepManagerFixedStep(); break; // 2 is fixed step
- default : AliWarning("Not a valid Step Manager.");
- }
-
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::SelectStepManager(Int_t t)
-{
- //
- // Selects a step manager type:
- // 0 - Ermilova
- // 1 - Geant3
- // 2 - Fixed step size
- //
-
-/* if (t == 1) {
- AliWarning("Sorry, Geant parametrization step manager is not implemented yet. Please ask K.Oyama for detail.");
- }
-*/
- fTypeOfStepManager = t;
- AliInfo(Form("Step Manager type %d was selected",fTypeOfStepManager));
-
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::StepManagerGeant()
-{
- //
- // Slow simulator. Every charged track produces electron cluster as hits
- // along its path across the drift volume. The step size is set acording
- // to Bethe-Bloch. The energy distribution of the delta electrons follows
- // a spectrum taken from Geant3.
- //
- Int_t pla = 0;
- Int_t cha = 0;
- Int_t sec = 0;
- Int_t det = 0;
- Int_t iPdg;
- Int_t qTot;
-
- Float_t hits[3];
- Float_t charge;
- Float_t aMass;
-
- Double_t pTot = 0;
- Double_t eDelta;
- Double_t betaGamma, pp;
- Double_t stepSize=0;
-
- Bool_t drRegion = kFALSE;
- Bool_t amRegion = kFALSE;
-
- TString cIdCurrent;
- TString cIdSensDr = "J";
- TString cIdSensAm = "K";
- Char_t cIdChamber[3];
- cIdChamber[2] = 0;
-
- TLorentzVector pos, mom;
-
- const Int_t kNplan = AliTRDgeometry::Nplan();
- const Int_t kNcham = AliTRDgeometry::Ncham();
- const Int_t kNdetsec = kNplan * kNcham;
-
- const Double_t kBig = 1.0E+12; // Infinitely big
- const Float_t kWion = 23.53; // Ionization energy
- const Float_t kPTotMaxEl = 0.002; // Maximum momentum for e+ e- g
-
- // Minimum energy for the step size adjustment
- const Float_t kEkinMinStep = 1.0e-5;
- // energy threshold for production of delta electrons
- const Float_t kECut = 1.0e4;
- // Parameters entering the parametrized range for delta electrons
- const float ra=5.37E-4, rb=0.9815, rc=3.123E-3;
- // Gas density -> To be made user adjustable !
- const float rho=0.004945 ; //[0.85*0.00549+0.15*0.00186 (Xe-CO2 85-15)]
-
- // Plateau value of the energy-loss for electron in xenon
- // taken from: Allison + Comb, Ann. Rev. Nucl. Sci. (1980), 30, 253
- //const Double_t kPlateau = 1.70;
- // the averaged value (26/3/99)
- const Float_t kPlateau = 1.55;
-
- const Float_t kPrim = 19.34; // dN1/dx|min for the gas mixture (90% Xe + 10% CO2)
- // First ionization potential (eV) for the gas mixture (90% Xe + 10% CO2)
- const Float_t kPoti = 12.1;
-
- const Int_t kPdgElectron = 11; // PDG code electron
-
- // Set the maximum step size to a very large number for all
- // neutral particles and those outside the driftvolume
- gMC->SetMaxStep(kBig);
-
- // Use only charged tracks
- if (( gMC->TrackCharge() ) &&
- (!gMC->IsTrackStop() ) &&
- (!gMC->IsTrackDisappeared())) {
-
- // Inside a sensitive volume?
- drRegion = kFALSE;
- amRegion = kFALSE;
- cIdCurrent = gMC->CurrentVolName();
- if (cIdSensDr == cIdCurrent[1]) {
- drRegion = kTRUE;
- }
- if (cIdSensAm == cIdCurrent[1]) {
- amRegion = kTRUE;
- }
- if (drRegion || amRegion) {
-
- // The hit coordinates and charge
- gMC->TrackPosition(pos);
- hits[0] = pos[0];
- hits[1] = pos[1];
- hits[2] = pos[2];
-
- // The sector number (0 - 17)
- // The numbering goes clockwise and starts at y = 0
- Float_t phi = kRaddeg*TMath::ATan2(pos[0],pos[1]);
- if (phi < 90.)
- phi = phi + 270.;
- else
- phi = phi - 90.;
- sec = ((Int_t) (phi / 20));
-
- // The plane and chamber number
- cIdChamber[0] = cIdCurrent[2];
- cIdChamber[1] = cIdCurrent[3];
- Int_t idChamber = (atoi(cIdChamber) % kNdetsec);
- cha = kNcham - ((Int_t) idChamber / kNplan) - 1;
- pla = ((Int_t) idChamber % kNplan);
-
- // Check on selected volumes
- Int_t addthishit = 1;
- if (fSensSelect) {
- if ((fSensPlane >= 0) && (pla != fSensPlane )) addthishit = 0;
- if ((fSensChamber >= 0) && (cha != fSensChamber)) addthishit = 0;
- if (fSensSector >= 0) {
- Int_t sens1 = fSensSector;
- Int_t sens2 = fSensSector + fSensSectorRange;
- sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect()))
- * AliTRDgeometry::Nsect();
- if (sens1 < sens2) {
- if ((sec < sens1) || (sec >= sens2)) addthishit = 0;
- }
- else {
- if ((sec < sens1) && (sec >= sens2)) addthishit = 0;
- }
- }
- }
-
- // Add this hit
- if (addthishit) {
-
- // The detector number
- det = fGeometry->GetDetector(pla,cha,sec);
-
- // Special hits only in the drift region
- if (drRegion) {
- // Create a track reference at the entrance and
- // exit of each chamber that contain the
- // momentum components of the particle
- if (gMC->IsTrackEntering() || gMC->IsTrackExiting()) {
- gMC->TrackMomentum(mom);
- AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
- }
-
- if (gMC->IsTrackEntering() && !gMC->IsNewTrack()) {
- // determine if hit belong to primary track
- fPrimaryTrackPid=gAlice->GetMCApp()->GetCurrentTrackNumber();
- //determine track length when entering the detector
- fTrackLength0=gMC->TrackLength();
- }
-
- // Create the hits from TR photons
- if (fTR) CreateTRhit(det);
- }
-
- // Calculate the energy of the delta-electrons
- // modified by Alex Bercuci (A.Bercuci@gsi.de) on 26.01.06
- // take into account correlation with the underlying GEANT tracking
- // mechanism. see
- // http://www-linux.gsi.de/~abercuci/Contributions/TRD/index.html
-
- // determine the most significant process (last on the processes list)
- // which caused this hit
- TArrayI processes;
- gMC->StepProcesses(processes);
- int nofprocesses=processes.GetSize(), pid;
- if(!nofprocesses) pid=0;
- else pid= processes[nofprocesses-1];
-
- // generate Edep according to GEANT parametrisation
- eDelta =TMath::Exp(fDeltaG->GetRandom()) - kPoti;
- eDelta=TMath::Max(eDelta,0.0);
- float pr_range=0.;
- float range=gMC->TrackLength()-fTrackLength0;
- // merge GEANT tracker information with localy cooked one
- if(gAlice->GetMCApp()->GetCurrentTrackNumber()==fPrimaryTrackPid) {
-// printf("primary pid=%d eDelta=%f\n",pid,eDelta);
- if(pid==27){
- if(eDelta>=kECut){
- pr_range=ra*eDelta*.001*(1.-rb/(1.+rc*eDelta*0.001))/rho;
- if(pr_range>=(3.7-range)) eDelta*=.1;
- }
- } else if(pid==1){
- if(eDelta<kECut) eDelta*=.5;
- else {
- pr_range=ra*eDelta*.001*(1.-rb/(1.+rc*eDelta*0.001))/rho;
- if(pr_range>=((AliTRDgeometry::DrThick()
- + AliTRDgeometry::AmThick())-range)) eDelta*=.05;
- else eDelta*=.5;
- }
- } else eDelta=0.;
- } else eDelta=0.;
-
- // Generate the electron cluster size
- if(eDelta==0.) qTot=0;
- else qTot = ((Int_t) (eDelta / kWion) + 1);
- // Create a new dEdx hit
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),det,hits,qTot, drRegion);
-
- // Calculate the maximum step size for the next tracking step
- // Produce only one hit if Ekin is below cutoff
- aMass = gMC->TrackMass();
- if ((gMC->Etot() - aMass) > kEkinMinStep) {
-
- // The energy loss according to Bethe Bloch
- iPdg = TMath::Abs(gMC->TrackPid());
- if ( (iPdg != kPdgElectron) ||
- ((iPdg == kPdgElectron) && (pTot < kPTotMaxEl))) {
- gMC->TrackMomentum(mom);
- pTot = mom.Rho();
- betaGamma = pTot / aMass;
- pp = BetheBlochGeant(betaGamma);
- // Take charge > 1 into account
- charge = gMC->TrackCharge();
- if (TMath::Abs(charge) > 1) pp = pp * charge*charge;
- } else { // Electrons above 20 Mev/c are at the plateau
- pp = kPrim * kPlateau;
- }
-
- Int_t nsteps = 0;
- do {nsteps = gRandom->Poisson(pp);} while(!nsteps);
- stepSize = 1./nsteps;
- gMC->SetMaxStep(stepSize);
- }
- }
- }
- }
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::StepManagerErmilova()
-{
- //
- // Slow simulator. Every charged track produces electron cluster as hits
- // along its path across the drift volume. The step size is set acording
- // to Bethe-Bloch. The energy distribution of the delta electrons follows
- // a spectrum taken from Ermilova et al.
- //
-
- Int_t pla = 0;
- Int_t cha = 0;
- Int_t sec = 0;
- Int_t det = 0;
- Int_t iPdg;
- Int_t qTot;
-
- Float_t hits[3];
- Double_t random[1];
- Float_t charge;
- Float_t aMass;
-
- Double_t pTot = 0;
- Double_t eDelta;
- Double_t betaGamma, pp;
- Double_t stepSize;
-
- Bool_t drRegion = kFALSE;
- Bool_t amRegion = kFALSE;
-
- TString cIdCurrent;
- TString cIdSensDr = "J";
- TString cIdSensAm = "K";
- Char_t cIdChamber[3];
- cIdChamber[2] = 0;
-
- TLorentzVector pos, mom;
-
- const Int_t kNplan = AliTRDgeometry::Nplan();
- const Int_t kNcham = AliTRDgeometry::Ncham();
- const Int_t kNdetsec = kNplan * kNcham;
-
- const Double_t kBig = 1.0E+12; // Infinitely big
- const Float_t kWion = 23.53; // Ionization energy
- const Float_t kPTotMaxEl = 0.002; // Maximum momentum for e+ e- g
-
- // energy threshold for production of delta electrons
- //const Float_t kECut = 1.0e4;
- // Parameters entering the parametrized range for delta electrons
- //const float ra=5.37E-4, rb=0.9815, rc=3.123E-3;
- // Gas density -> To be made user adjustable !
- //const float rho=0.004945 ; //[0.85*0.00549+0.15*0.00186 (Xe-CO2 85-15)]
-
- // Minimum energy for the step size adjustment
- const Float_t kEkinMinStep = 1.0e-5;
-
- // Plateau value of the energy-loss for electron in xenon
- // taken from: Allison + Comb, Ann. Rev. Nucl. Sci. (1980), 30, 253
- //const Double_t kPlateau = 1.70;
- // the averaged value (26/3/99)
- const Float_t kPlateau = 1.55;
-
- const Float_t kPrim = 48.0; // dN1/dx|min for the gas mixture (90% Xe + 10% CO2)
- // First ionization potential (eV) for the gas mixture (90% Xe + 10% CO2)
- const Float_t kPoti = 12.1;
-
- const Int_t kPdgElectron = 11; // PDG code electron
-
- // Set the maximum step size to a very large number for all
- // neutral particles and those outside the driftvolume
- gMC->SetMaxStep(kBig);
-
- // Use only charged tracks
- if (( gMC->TrackCharge() ) &&
- (!gMC->IsTrackStop() ) &&
- (!gMC->IsTrackDisappeared())) {
-
- // Inside a sensitive volume?
- drRegion = kFALSE;
- amRegion = kFALSE;
- cIdCurrent = gMC->CurrentVolName();
- if (cIdSensDr == cIdCurrent[1]) {
- drRegion = kTRUE;
- }
- if (cIdSensAm == cIdCurrent[1]) {
- amRegion = kTRUE;
- }
- if (drRegion || amRegion) {
-
- // The hit coordinates and charge
- gMC->TrackPosition(pos);
- hits[0] = pos[0];
- hits[1] = pos[1];
- hits[2] = pos[2];
-
- // The sector number (0 - 17)
- // The numbering goes clockwise and starts at y = 0
- Float_t phi = kRaddeg*TMath::ATan2(pos[0],pos[1]);
- if (phi < 90.)
- phi = phi + 270.;
- else
- phi = phi - 90.;
- sec = ((Int_t) (phi / 20));
-
- // The plane and chamber number
- cIdChamber[0] = cIdCurrent[2];
- cIdChamber[1] = cIdCurrent[3];
- Int_t idChamber = (atoi(cIdChamber) % kNdetsec);
- cha = kNcham - ((Int_t) idChamber / kNplan) - 1;
- pla = ((Int_t) idChamber % kNplan);
-
- // Check on selected volumes
- Int_t addthishit = 1;
- if (fSensSelect) {
- if ((fSensPlane >= 0) && (pla != fSensPlane )) addthishit = 0;
- if ((fSensChamber >= 0) && (cha != fSensChamber)) addthishit = 0;
- if (fSensSector >= 0) {
- Int_t sens1 = fSensSector;
- Int_t sens2 = fSensSector + fSensSectorRange;
- sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect()))
- * AliTRDgeometry::Nsect();
- if (sens1 < sens2) {
- if ((sec < sens1) || (sec >= sens2)) addthishit = 0;
- }
- else {
- if ((sec < sens1) && (sec >= sens2)) addthishit = 0;
- }
- }
- }
-
- // Add this hit
- if (addthishit) {
-
- // The detector number
- det = fGeometry->GetDetector(pla,cha,sec);
-
- // Special hits only in the drift region
- if (drRegion) {
-
- // Create a track reference at the entrance and
- // exit of each chamber that contain the
- // momentum components of the particle
- if (gMC->IsTrackEntering() || gMC->IsTrackExiting()) {
- gMC->TrackMomentum(mom);
- AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
- }
- // Create the hits from TR photons
- if (fTR) CreateTRhit(det);
- }
-
-
- // Calculate the energy of the delta-electrons
- eDelta = TMath::Exp(fDeltaE->GetRandom()) - kPoti;
- eDelta = TMath::Max(eDelta,0.0);
- // Generate the electron cluster size
- if(eDelta==0.) qTot=0;
- else qTot = ((Int_t) (eDelta / kWion) + 1);
-
- // Create a new dEdx hit
- if (drRegion) {
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber()
- ,det,hits,qTot, kTRUE);
- }
- else {
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber()
- ,det,hits,qTot,kFALSE);
- }
-
- // Calculate the maximum step size for the next tracking step
- // Produce only one hit if Ekin is below cutoff
- aMass = gMC->TrackMass();
- if ((gMC->Etot() - aMass) > kEkinMinStep) {
-
- // The energy loss according to Bethe Bloch
- iPdg = TMath::Abs(gMC->TrackPid());
- if ( (iPdg != kPdgElectron) ||
- ((iPdg == kPdgElectron) && (pTot < kPTotMaxEl))) {
- gMC->TrackMomentum(mom);
- pTot = mom.Rho();
- betaGamma = pTot / aMass;
- pp = kPrim * BetheBloch(betaGamma);
- // Take charge > 1 into account
- charge = gMC->TrackCharge();
- if (TMath::Abs(charge) > 1) pp = pp * charge*charge;
- } else { // Electrons above 20 Mev/c are at the plateau
- pp = kPrim * kPlateau;
- }
-
- if (pp > 0) {
- do
- gMC->GetRandom()->RndmArray(1, random);
- while ((random[0] == 1.) || (random[0] == 0.));
- stepSize = - TMath::Log(random[0]) / pp;
- gMC->SetMaxStep(stepSize);
- }
- }
- }
- }
- }
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::StepManagerFixedStep()
{
//
// Slow simulator. Every charged track produces electron cluster as hits
// along its path across the drift volume. The step size is fixed in
// this version of the step manager.
//
+ // Works for Xe/CO2 as well as Ar/CO2
+ //
- Int_t pla = 0;
- Int_t cha = 0;
- Int_t sec = 0;
- Int_t det = 0;
+ // PDG code electron
+ const Int_t kPdgElectron = 11;
+
+ Int_t layer = 0;
+ Int_t stack = 0;
+ Int_t sector = 0;
+ Int_t det = 0;
Int_t qTot;
Float_t hits[3];
Bool_t drRegion = kFALSE;
Bool_t amRegion = kFALSE;
+ TString cIdPath;
+ Char_t cIdSector[3];
+ cIdSector[2] = 0;
+
TString cIdCurrent;
TString cIdSensDr = "J";
TString cIdSensAm = "K";
Char_t cIdChamber[3];
- cIdChamber[2] = 0;
-
- TLorentzVector pos, mom;
+ cIdChamber[2] = 0;
- const Int_t kNplan = AliTRDgeometry::Nplan();
- const Int_t kNcham = AliTRDgeometry::Ncham();
- const Int_t kNdetsec = kNplan * kNcham;
+ TLorentzVector pos;
+ TLorentzVector mom;
- const Double_t kBig = 1.0E+12;
+ const Int_t kNlayer = AliTRDgeometry::Nlayer();
+ const Int_t kNstack = AliTRDgeometry::Nstack();
+ const Int_t kNdetsec = kNlayer * kNstack;
- const Float_t kWion = 23.53; // Ionization energy
+ const Double_t kBig = 1.0e+12;
const Float_t kEkinMinStep = 1.0e-5; // Minimum energy for the step size adjustment
// Set the maximum step size to a very large number for all
// neutral particles and those outside the driftvolume
- gMC->SetMaxStep(kBig);
+ if (!fPrimaryIonisation) gMC->SetMaxStep(kBig);
// If not charged track or already stopped or disappeared, just return.
if ((!gMC->TrackCharge()) ||
- gMC->IsTrackStop() ||
- gMC->IsTrackDisappeared()) return;
+ gMC->IsTrackDisappeared()) {
+ return;
+ }
// Inside a sensitive volume?
cIdCurrent = gMC->CurrentVolName();
- if (cIdSensDr == cIdCurrent[1]) drRegion = kTRUE;
- if (cIdSensAm == cIdCurrent[1]) amRegion = kTRUE;
+ if (cIdSensDr == cIdCurrent[1]) {
+ drRegion = kTRUE;
+ }
+ if (cIdSensAm == cIdCurrent[1]) {
+ amRegion = kTRUE;
+ }
- if ((!drRegion) && (!amRegion)) return;
+ if ((!drRegion) &&
+ (!amRegion)) {
+ return;
+ }
// The hit coordinates and charge
gMC->TrackPosition(pos);
hits[1] = pos[1];
hits[2] = pos[2];
- // The sector number (0 - 17)
- // The numbering goes clockwise and starts at y = 0
- Float_t phi = kRaddeg*TMath::ATan2(pos[0],pos[1]);
- if (phi < 90.) phi += 270.;
- else phi -= 90.;
- sec = ((Int_t) (phi / 20.));
+ // The sector number (0 - 17), according to standard coordinate system
+ cIdPath = gGeoManager->GetPath();
+ cIdSector[0] = cIdPath[21];
+ cIdSector[1] = cIdPath[22];
+ sector = atoi(cIdSector);
// The plane and chamber number
- cIdChamber[0] = cIdCurrent[2];
- cIdChamber[1] = cIdCurrent[3];
+ cIdChamber[0] = cIdCurrent[2];
+ cIdChamber[1] = cIdCurrent[3];
Int_t idChamber = (atoi(cIdChamber) % kNdetsec);
- cha = kNcham - ((Int_t) idChamber / kNplan) - 1;
- pla = ((Int_t) idChamber % kNplan);
-
- // Check on selected volumes
- Int_t addthishit = 1;
- if(fSensSelect) {
- if ((fSensPlane >= 0) && (pla != fSensPlane )) addthishit = 0;
- if ((fSensChamber >= 0) && (cha != fSensChamber)) addthishit = 0;
- if (fSensSector >= 0) {
- Int_t sens1 = fSensSector;
- Int_t sens2 = fSensSector + fSensSectorRange;
- sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect())) * AliTRDgeometry::Nsect();
- if (sens1 < sens2) {
- if ((sec < sens1) || (sec >= sens2)) addthishit = 0;
- }
- else {
- if ((sec < sens1) && (sec >= sens2)) addthishit = 0;
- }
- }
- }
+ stack = ((Int_t) idChamber / kNlayer);
+ layer = ((Int_t) idChamber % kNlayer);
- if (!addthishit) return;
+ // The detector number
+ det = fGeometry->GetDetector(layer,stack,sector);
- det = fGeometry->GetDetector(pla,cha,sec); // The detector number
-
- Int_t trkStat = 0; // 0: InFlight 1:Entering 2:Exiting
+ // 0: InFlight 1:Entering 2:Exiting
+ Int_t trkStat = 0;
// Special hits only in the drift region
- if (drRegion) {
+ if ((drRegion) &&
+ (gMC->IsTrackEntering())) {
- // Create a track reference at the entrance and exit of each
- // chamber that contain the momentum components of the particle
-
- if (gMC->IsTrackEntering()) {
- gMC->TrackMomentum(mom);
- AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
- trkStat = 1;
- }
- if (gMC->IsTrackExiting()) {
- gMC->TrackMomentum(mom);
- AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
- trkStat = 2;
+ // Create a track reference at the entrance of each
+ // chamber that contains the momentum components of the particle
+ gMC->TrackMomentum(mom);
+ AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTRD);
+ trkStat = 1;
+
+ // Create the hits from TR photons if electron/positron is
+ // entering the drift volume
+ if ((fTR) &&
+ (fTRon) &&
+ (TMath::Abs(gMC->TrackPid()) == kPdgElectron)) {
+ CreateTRhit(det);
}
- // Create the hits from TR photons
- if (fTR) CreateTRhit(det);
+ }
+ else if ((amRegion) &&
+ (gMC->IsTrackExiting())) {
+
+ // Create a track reference at the exit of each
+ // chamber that contains the momentum components of the particle
+ gMC->TrackMomentum(mom);
+ AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTRD);
+ trkStat = 2;
}
// Calculate the charge according to GEANT Edep
// Create a new dEdx hit
eDep = TMath::Max(gMC->Edep(),0.0) * 1.0e+09;
- qTot = (Int_t) (eDep / kWion);
- AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber()
- ,det,hits,qTot,drRegion);
+ qTot = (Int_t) (eDep / fWion);
+ if ((qTot) ||
+ (trkStat)) {
+ AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber()
+ ,det
+ ,hits
+ ,qTot
+ ,gMC->TrackTime()*1.0e06
+ ,drRegion);
+ }
// Set Maximum Step Size
// Produce only one hit if Ekin is below cutoff
- if ((gMC->Etot() - gMC->TrackMass()) < kEkinMinStep) return;
- gMC->SetMaxStep(fStepSize);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDv1::BetheBloch(Double_t bg)
-{
- //
- // Parametrization of the Bethe-Bloch-curve
- // The parametrization is the same as for the TPC and is taken from Lehrhaus.
- //
-
- // This parameters have been adjusted to averaged values from GEANT
- const Double_t kP1 = 7.17960e-02;
- const Double_t kP2 = 8.54196;
- const Double_t kP3 = 1.38065e-06;
- const Double_t kP4 = 5.30972;
- const Double_t kP5 = 2.83798;
-
- // This parameters have been adjusted to Xe-data found in:
- // Allison & Cobb, Ann. Rev. Nucl. Sci. (1980), 30, 253
- //const Double_t kP1 = 0.76176E-1;
- //const Double_t kP2 = 10.632;
- //const Double_t kP3 = 3.17983E-6;
- //const Double_t kP4 = 1.8631;
- //const Double_t kP5 = 1.9479;
-
- // Lower cutoff of the Bethe-Bloch-curve to limit step sizes
- const Double_t kBgMin = 0.8;
- const Double_t kBBMax = 6.83298;
- //const Double_t kBgMin = 0.6;
- //const Double_t kBBMax = 17.2809;
- //const Double_t kBgMin = 0.4;
- //const Double_t kBBMax = 82.0;
-
- if (bg > kBgMin) {
- Double_t yy = bg / TMath::Sqrt(1. + bg*bg);
- Double_t aa = TMath::Power(yy,kP4);
- Double_t bb = TMath::Power((1./bg),kP5);
- bb = TMath::Log(kP3 + bb);
- return ((kP2 - aa - bb)*kP1 / aa);
- }
- else {
- return kBBMax;
+ if ((gMC->Etot() - gMC->TrackMass()) < kEkinMinStep) {
+ return;
}
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDv1::BetheBlochGeant(Double_t bg)
-{
- //
- // Return dN/dx (number of primary collisions per centimeter)
- // for given beta*gamma factor.
- //
- // Implemented by K.Oyama according to GEANT 3 parametrization shown in
- // A.Andronic's webpage: http://www-alice.gsi.de/trd/papers/dedx/dedx.html
- // This must be used as a set with IntSpecGeant.
- //
-
- Double_t arr_g[20] = {
- 1.100000, 1.200000, 1.300000, 1.500000,
- 1.800000, 2.000000, 2.500000, 3.000000,
- 4.000000, 7.000000, 10.000000, 20.000000,
- 40.000000, 70.000000, 100.000000, 300.000000,
- 600.000000, 1000.000000, 3000.000000, 10000.000000 };
-
- Double_t arr_nc[20] = {
- 75.009056, 45.508083, 35.299252, 27.116327,
- 22.734999, 21.411915, 19.934095, 19.449375,
- 19.344431, 20.185553, 21.027925, 22.912676,
- 24.933352, 26.504053, 27.387468, 29.566597,
- 30.353779, 30.787134, 31.129285, 31.157350 };
-
- // betagamma to gamma
- Double_t g = TMath::Sqrt( 1. + bg*bg );
-
- // Find the index just before the point we need.
- int i;
- for( i = 0 ; i < 18 ; i++ )
- if( arr_g[i] < g && arr_g[i+1] > g )
- break;
-
- // Simple interpolation.
- Double_t pp = ((arr_nc[i+1] - arr_nc[i]) /
- (arr_g[i+1]-arr_g[i])) * (g-arr_g[i]) + arr_nc[i];
-
- return pp; //arr_nc[8];
-
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::Stepping()
-{
-// Stepping info
-// ---
-
- cout << "X(cm) "
- << "Y(cm) "
- << "Z(cm) "
- << "KinE(MeV) "
- << "dE(MeV) "
- << "Step(cm) "
- << "TrackL(cm) "
- << "Volume "
- << "Process "
- << endl;
-
- // Position
- //
- Double_t x, y, z;
- gMC->TrackPosition(x, y, z);
- cout << setw(8) << setprecision(3) << x << " "
- << setw(8) << setprecision(3) << y << " "
- << setw(8) << setprecision(3) << z << " ";
-
- // Kinetic energy
- //
- Double_t px, py, pz, etot;
- gMC->TrackMomentum(px, py, pz, etot);
- Double_t ekin = etot - gMC->TrackMass();
- cout << setw(9) << setprecision(4) << ekin*1e03 << " ";
-
- // Energy deposit
- //
- cout << setw(9) << setprecision(4) << gMC->Edep()*1e03 << " ";
-
- // Step length
- //
- cout << setw(8) << setprecision(3) << gMC->TrackStep() << " ";
-
- // Track length
- //
- cout << setw(8) << setprecision(3) << gMC->TrackLength() << " ";
-
- // Volume
- //
- if (gMC->CurrentVolName() != 0)
- cout << setw(4) << gMC->CurrentVolName() << " ";
- else
- cout << setw(4) << "None" << " ";
-
- // Process
- //
- TArrayI processes;
- Int_t nofProcesses = gMC->StepProcesses(processes);
- for(int ip=0;ip<nofProcesses; ip++)
- cout << TMCProcessName[processes[ip]]<<" / ";
-
- cout << endl;
-}
-
-
-//_____________________________________________________________________________
-Double_t Ermilova(Double_t *x, Double_t *)
-{
- //
- // Calculates the delta-ray energy distribution according to Ermilova.
- // Logarithmic scale !
- //
-
- Double_t energy;
- Double_t dpos;
- Double_t dnde;
-
- Int_t pos1, pos2;
-
- const Int_t kNv = 31;
-
- Float_t vxe[kNv] = { 2.3026, 2.9957, 3.4012, 3.6889, 3.9120
- , 4.0943, 4.2485, 4.3820, 4.4998, 4.6052
- , 4.7005, 5.0752, 5.2983, 5.7038, 5.9915
- , 6.2146, 6.5221, 6.9078, 7.3132, 7.6009
- , 8.0064, 8.5172, 8.6995, 8.9872, 9.2103
- , 9.4727, 9.9035,10.3735,10.5966,10.8198
- ,11.5129 };
-
- Float_t vye[kNv] = { 80.0 , 31.0 , 23.3 , 21.1 , 21.0
- , 20.9 , 20.8 , 20.0 , 16.0 , 11.0
- , 8.0 , 6.0 , 5.2 , 4.6 , 4.0
- , 3.5 , 3.0 , 1.4 , 0.67 , 0.44
- , 0.3 , 0.18 , 0.12 , 0.08 , 0.056
- , 0.04 , 0.023, 0.015, 0.011, 0.01
- , 0.004 };
-
- energy = x[0];
-
- // Find the position
- pos1 = pos2 = 0;
- dpos = 0;
- do {
- dpos = energy - vxe[pos2++];
- }
- while (dpos > 0);
- pos2--;
- if (pos2 > kNv) pos2 = kNv - 1;
- pos1 = pos2 - 1;
-
- // Differentiate between the sampling points
- dnde = (vye[pos1] - vye[pos2]) / (vxe[pos2] - vxe[pos1]);
-
- return dnde;
-
-}
-
-//_____________________________________________________________________________
-Double_t IntSpecGeant(Double_t *x, Double_t *)
-{
- //
- // Integrated spectrum from Geant3
- //
-
- const Int_t n_pts = 83;
- Double_t arr_e[n_pts] = {
- 2.421257, 2.483278, 2.534301, 2.592230,
- 2.672067, 2.813299, 3.015059, 3.216819,
- 3.418579, 3.620338, 3.868209, 3.920198,
- 3.978284, 4.063923, 4.186264, 4.308605,
- 4.430946, 4.553288, 4.724261, 4.837736,
- 4.999842, 5.161949, 5.324056, 5.486163,
- 5.679688, 5.752998, 5.857728, 5.962457,
- 6.067185, 6.171914, 6.315653, 6.393674,
- 6.471694, 6.539689, 6.597658, 6.655627,
- 6.710957, 6.763648, 6.816338, 6.876198,
- 6.943227, 7.010257, 7.106285, 7.252151,
- 7.460531, 7.668911, 7.877290, 8.085670,
- 8.302979, 8.353585, 8.413120, 8.483500,
- 8.541030, 8.592857, 8.668865, 8.820485,
- 9.037086, 9.253686, 9.470286, 9.686887,
- 9.930838, 9.994655, 10.085822, 10.176990,
- 10.268158, 10.359325, 10.503614, 10.627565,
- 10.804637, 10.981709, 11.158781, 11.335854,
- 11.593397, 11.781165, 12.049404, 12.317644,
- 12.585884, 12.854123, 14.278421, 16.975889,
- 20.829416, 24.682943, 28.536469
- };
- Double_t arr_dndx[n_pts] = {
- 19.344431, 18.664679, 18.136106, 17.567745,
- 16.836426, 15.677382, 14.281277, 13.140237,
- 12.207677, 11.445510, 10.697049, 10.562296,
- 10.414673, 10.182341, 9.775256, 9.172330,
- 8.240271, 6.898587, 4.808303, 3.889751,
- 3.345288, 3.093431, 2.897347, 2.692470,
- 2.436222, 2.340029, 2.208579, 2.086489,
- 1.975535, 1.876519, 1.759626, 1.705024,
- 1.656374, 1.502638, 1.330566, 1.200697,
- 1.101168, 1.019323, 0.943867, 0.851951,
- 0.755229, 0.671576, 0.570675, 0.449672,
- 0.326722, 0.244225, 0.188225, 0.149608,
- 0.121529, 0.116289, 0.110636, 0.103490,
- 0.096147, 0.089191, 0.079780, 0.063927,
- 0.047642, 0.036341, 0.028250, 0.022285,
- 0.017291, 0.016211, 0.014802, 0.013533,
- 0.012388, 0.011352, 0.009803, 0.008537,
- 0.007039, 0.005829, 0.004843, 0.004034,
- 0.003101, 0.002564, 0.001956, 0.001494,
- 0.001142, 0.000873, 0.000210, 0.000014,
- 0.000000, 0.000000, 0.000000
- };
-
- Int_t i;
- Double_t energy = x[0];
- Double_t dnde;
-
- for( i = 0 ; i < n_pts ; i++ )
- if( energy < arr_e[i] ) break;
-
- if( i == 0 )
- AliErrorGeneral("AliTRDv1","Given energy value is too small or zero");
-
- // Differentiate
- dnde = (arr_dndx[i-1] - arr_dndx[i]) / (arr_e[i] - arr_e[i-1]);
-
- return dnde;
+ if (!fPrimaryIonisation) gMC->SetMaxStep(fStepSize);
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff