#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 "AliTRDSimParam.h"
#include "AliTRDhit.h"
-#include "AliTRDsim.h"
+#include "AliTRDsimTR.h"
#include "AliTRDv1.h"
ClassImp(AliTRDv1)
,fTR(NULL)
,fTypeOfStepManager(0)
,fStepSize(0)
+ ,fWion(0)
,fDeltaE(NULL)
,fDeltaG(NULL)
,fTrackLength0(0)
,fTR(NULL)
,fTypeOfStepManager(2)
,fStepSize(0.1)
+ ,fWion(0)
,fDeltaE(NULL)
,fDeltaG(NULL)
,fTrackLength0(0)
SetBufferSize(128000);
-}
-
-//_____________________________________________________________________________
-AliTRDv1::AliTRDv1(const AliTRDv1 &trd)
- :AliTRD(trd)
- ,fTRon(trd.fTRon)
- ,fTR(NULL)
- ,fTypeOfStepManager(trd.fTypeOfStepManager)
- ,fStepSize(trd.fStepSize)
- ,fDeltaE(NULL)
- ,fDeltaG(NULL)
- ,fTrackLength0(trd.fTrackLength0)
- ,fPrimaryTrackPid(trd.fPrimaryTrackPid)
-{
- //
- // Copy constructor
- //
-
- fDeltaE->Copy(*((AliTRDv1 &) trd).fDeltaE);
- fDeltaG->Copy(*((AliTRDv1 &) trd).fDeltaG);
- fTR->Copy(*((AliTRDv1 &) trd).fTR);
+ if (AliTRDSimParam::Instance()->IsXenon()) {
+ fWion = 23.53; // Ionization energy XeCO2 (85/15)
+ }
+ else if (AliTRDSimParam::Instance()->IsArgon()) {
+ fWion = 27.21; // Ionization energy ArCO2 (82/18)
+ }
+ else {
+ AliFatal("Wrong gas mixture");
+ exit(1);
+ }
}
}
-//_____________________________________________________________________________
-AliTRDv1 &AliTRDv1::operator=(const AliTRDv1 &trd)
-{
- //
- // Assignment operator
- //
-
- if (this != &trd) ((AliTRDv1 &) trd).Copy(*this);
-
- return *this;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDv1::Copy(TObject &trd) const
-{
- //
- // Copy function
- //
-
- ((AliTRDv1 &) trd).fTypeOfStepManager = fTypeOfStepManager;
- ((AliTRDv1 &) trd).fStepSize = fStepSize;
- ((AliTRDv1 &) trd).fTRon = fTRon;
- ((AliTRDv1 &) trd).fTrackLength0 = fTrackLength0;
- ((AliTRDv1 &) trd).fPrimaryTrackPid = fPrimaryTrackPid;
-
- fDeltaE->Copy(*((AliTRDv1 &) trd).fDeltaE);
- fDeltaG->Copy(*((AliTRDv1 &) trd).fDeltaG);
- fTR->Copy(*((AliTRDv1 &) trd).fTR);
-
-}
-
//_____________________________________________________________________________
void AliTRDv1::AddAlignableVolumes() const
{
TString volPath;
TString symName;
- TString vpStr = "ALIC_1/B077_1/BSEGMO";
- TString vpApp1 = "_1/BTRD";
- TString vpApp2 = "_1";
- TString vpApp3 = "/UTR1_1/UTS1_1/UTI1_1/UT";
+ 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";
+ TString snStr = "TRD/sm";
+ TString snApp1 = "/st";
+ TString snApp2 = "/pl";
//
// The super modules
// ...
// TRD/sm17
//
- for (Int_t isect = 0; isect < AliTRDgeometry::Nsect(); isect++) {
+ for (Int_t isector = 0; isector < AliTRDgeometry::Nsector(); isector++) {
volPath = vpStr;
- volPath += isect;
+ volPath += isector;
volPath += vpApp1;
- volPath += isect;
+ volPath += isector;
volPath += vpApp2;
symName = snStr;
- symName += Form("%02d",isect);
+ symName += Form("%02d",isector);
gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data());
// ...
// TRD/sm17/st4/pl5
//
- for (Int_t isect = 0; isect < AliTRDgeometry::Nsect(); isect++) {
- for (Int_t icham = 0; icham < AliTRDgeometry::Ncham(); icham++) {
- for (Int_t iplan = 0; iplan < AliTRDgeometry::Nplan(); iplan++) {
+ 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++) {
- Int_t idet = AliTRDgeometry::GetDetectorSec(iplan,icham);
+ layer = idTRD1 + ilayer;
+ modUID = AliGeomManager::LayerToVolUIDSafe(layer,isector*5+istack);
+
+ Int_t idet = AliTRDgeometry::GetDetectorSec(ilayer,istack);
volPath = vpStr;
- volPath += isect;
+ volPath += isector;
volPath += vpApp1;
- volPath += isect;
+ volPath += isector;
volPath += vpApp2;
- volPath += vpApp3;
+ 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",isect);
+ symName += Form("%02d",isector);
symName += snApp1;
- symName += icham;
+ symName += istack;
symName += snApp2;
- symName += iplan;
-
- gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data());
+ symName += ilayer;
+
+ TGeoPNEntry *alignableEntry =
+ gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data(),modUID);
+
+ // Add the tracking to local matrix following the TPC example
+ if (alignableEntry) {
+ // Is this correct still????
+ 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()));
+ }
}
}
// 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;
TLorentzVector pos;
- // Create TR at the entrance of the chamber
- if (gMC->IsTrackEntering()) {
+ Float_t eTR[kNTR];
+ Int_t nTR;
- // Create TR only for electrons
- Int_t iPdg = gMC->TrackPid();
- if (TMath::Abs(iPdg) != kPdgElectron) {
- return;
- }
+ // 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));
+ }
- Float_t eTR[kNTR];
- Int_t nTR;
+ // Loop through the TR photons
+ for (Int_t iTR = 0; iTR < nTR; iTR++) {
- // 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));
- }
+ Float_t energyMeV = eTR[iTR] * 0.001;
+ Float_t energyeV = eTR[iTR] * 1000.0;
+ Float_t absLength = 0.0;
+ Float_t sigma = 0.0;
- // 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 = 0.0;
- 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 (AliTRDSimParam::Instance()->IsXenon()) {
+ muNo = fTR->GetMuXe(energyMeV);
+ }
+ else if (AliTRDSimParam::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);
}
AliInfo("TR simulation off");
}
else {
- fTR = new AliTRDsim();
+ fTR = new AliTRDsimTR();
}
- // First ionization potential (eV) for the gas mixture (90% Xe + 10% CO2)
+ // First ionization potential (eV) for the gas mixture
const Float_t kPoti = 12.1;
// Maximum energy (50 keV);
const Float_t kEend = 50000.0;
// to Bethe-Bloch. The energy distribution of the delta electrons follows
// a spectrum taken from Geant3.
//
+ // Works only for Xe/CO2!!
+ //
// Version by A. Bercuci
//
- Int_t pla = 0;
- Int_t cha = 0;
- Int_t sec = 0;
- Int_t det = 0;
+ Int_t layer = 0;
+ Int_t stack = 0;
+ Int_t sector = 0;
+ Int_t det = 0;
Int_t iPdg;
Int_t qTot;
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";
TArrayI processes;
- const Int_t kNplan = AliTRDgeometry::Nplan();
- const Int_t kNcham = AliTRDgeometry::Ncham();
- const Int_t kNdetsec = kNplan * kNcham;
+ const Int_t kNlayer = AliTRDgeometry::Nlayer();
+ const Int_t kNstack = AliTRDgeometry::Nstack();
+ const Int_t kNdetsec = kNlayer * kNstack;
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
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 < 90.0) {
- phi = phi + 270.0;
- }
- else {
- phi = phi - 90.0;
- }
- sec = ((Int_t) (phi / 20.0));
+ // 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
+ // The layer and stack 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;
-
- // Add this hit
- if (addthishit) {
-
- // The detector number
- det = fGeometry->GetDetector(pla,cha,sec);
-
- // Special hits only in the drift region
- if (drRegion) {
+ stack = ((Int_t) idChamber / kNlayer);
+ layer = ((Int_t) idChamber % kNlayer);
+
+ // The detector number
+ det = fGeometry->GetDetector(layer,stack,sector);
+
+ // Special hits only in the drift region
+ if ((drRegion) &&
+ (gMC->IsTrackEntering())) {
+
+ // 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);
+
+ // Create the hits from TR photons if electron/positron is
+ // entering the drift volume
+ if ((fTR) &&
+ (TMath::Abs(gMC->TrackPid()) == kPdgElectron)) {
+ CreateTRhit(det);
+ }
- // 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());
- }
+ }
+ else if ((amRegion) &&
+ (gMC->IsTrackExiting())) {
- 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);
+ // 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);
- }
+ }
- // 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
- gMC->StepProcesses(processes);
- Int_t nofprocesses = processes.GetSize();
- Int_t pid;
- if (!nofprocesses) {
- pid = 0;
- }
- else {
- pid = processes[nofprocesses-1];
- }
+ // 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
+ gMC->StepProcesses(processes);
+ Int_t nofprocesses = processes.GetSize();
+ Int_t 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_t prRange = 0.0;
- Float_t range = gMC->TrackLength() - fTrackLength0;
- // merge GEANT tracker information with locally cooked one
- if (gAlice->GetMCApp()->GetCurrentTrackNumber() == fPrimaryTrackPid) {
- if (pid == 27) {
- if (eDelta >= kECut) {
- prRange = kRa * eDelta * 0.001
- * (1.0 - kRb / (1.0 + kRc * eDelta * 0.001)) / kRho;
- if (prRange >= (3.7 - range)) {
- eDelta *= 0.1;
- }
- }
- }
- else if (pid == 1) {
- if (eDelta < kECut) {
+ // Generate Edep according to GEANT parametrisation
+ eDelta = TMath::Exp(fDeltaG->GetRandom()) - kPoti;
+ eDelta = TMath::Max(eDelta,0.0);
+ Float_t prRange = 0.0;
+ Float_t range = gMC->TrackLength() - fTrackLength0;
+ // merge GEANT tracker information with locally cooked one
+ if (gAlice->GetMCApp()->GetCurrentTrackNumber() == fPrimaryTrackPid) {
+ if (pid == 27) {
+ if (eDelta >= kECut) {
+ prRange = kRa * eDelta * 0.001
+ * (1.0 - kRb / (1.0 + kRc * eDelta * 0.001)) / kRho;
+ if (prRange >= (3.7 - range)) {
+ eDelta *= 0.1;
+ }
+ }
+ }
+ else if (pid == 1) {
+ if (eDelta < kECut) {
+ eDelta *= 0.5;
+ }
+ else {
+ prRange = kRa * eDelta * 0.001
+ * (1.0 - kRb / (1.0 + kRc * eDelta * 0.001)) / kRho;
+ if (prRange >= ((AliTRDgeometry::DrThick()
+ + AliTRDgeometry::AmThick()) - range)) {
+ eDelta *= 0.05;
+ }
+ else {
eDelta *= 0.5;
- }
- else {
- prRange = kRa * eDelta * 0.001
- * (1.0 - kRb / (1.0 + kRc * eDelta * 0.001)) / kRho;
- if (prRange >= ((AliTRDgeometry::DrThick()
- + AliTRDgeometry::AmThick()) - range)) {
- eDelta *= 0.05;
- }
- else {
- eDelta *= 0.5;
- }
- }
- }
- else {
- eDelta = 0.0;
- }
- }
+ }
+ }
+ }
else {
eDelta = 0.0;
- }
+ }
+ }
+ else {
+ eDelta = 0.0;
+ }
- // Generate the electron cluster size
- if (eDelta == 0.0) {
- qTot = 0;
- }
- else {
- qTot = ((Int_t) (eDelta / kWion) + 1);
- }
+ // Generate the electron cluster size
+ if (eDelta > 0.0) {
- // Create a new dEdx hit
+ qTot = ((Int_t) (eDelta / fWion) + 1);
+
+ // Create a new dEdx hit
AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber()
,det
,hits
,qTot
+ ,gMC->TrackTime()*1.0e06
,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 = 1.0 / nsteps;
- gMC->SetMaxStep(stepSize);
+ }
+
+ // 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 = 1.0 / nsteps;
+ gMC->SetMaxStep(stepSize);
}
// to Bethe-Bloch. The energy distribution of the delta electrons follows
// a spectrum taken from Ermilova et al.
//
+ // Works only for Xe/CO2!!
+ //
- Int_t pla = 0;
- Int_t cha = 0;
- Int_t sec = 0;
- Int_t det = 0;
+ Int_t layer = 0;
+ Int_t stack = 0;
+ Int_t sector = 0;
+ Int_t det = 0;
Int_t iPdg;
Int_t qTot;
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";
TLorentzVector pos;
TLorentzVector mom;
- const Int_t kNplan = AliTRDgeometry::Nplan();
- const Int_t kNcham = AliTRDgeometry::Ncham();
- const Int_t kNdetsec = kNplan * kNcham;
+ const Int_t kNlayer = AliTRDgeometry::Nlayer();
+ const Int_t kNstack = AliTRDgeometry::Nstack();
+ const Int_t kNdetsec = kNlayer * kNstack;
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
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 < 90.0) {
- phi = phi + 270.0;
- }
- else {
- phi = phi - 90.0;
- }
- sec = ((Int_t) (phi / 20.0));
+ // 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];
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;
+ stack = ((Int_t) idChamber / kNlayer);
+ layer = ((Int_t) idChamber % kNlayer);
+
+ // The detector number
+ det = fGeometry->GetDetector(layer,stack,sector);
+
+ // Special hits only in the drift region
+ if ((drRegion) &&
+ (gMC->IsTrackEntering())) {
+
+ // 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);
+
+ // Create the hits from TR photons if electron/positron is
+ // entering the drift volume
+ if ((fTR) &&
+ (TMath::Abs(gMC->TrackPid()) == kPdgElectron)) {
+ CreateTRhit(det);
+ }
- // Add this hit
- if (addthishit) {
+ }
+ else if ((amRegion) &&
+ (gMC->IsTrackExiting())) {
- // The detector number
- det = fGeometry->GetDetector(pla,cha,sec);
+ // 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);
- // 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 > 0.0) {
- // 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 == 0.0) {
- qTot = 0;
- }
- else {
- qTot = ((Int_t) (eDelta / kWion) + 1);
- }
+ qTot = ((Int_t) (eDelta / fWion) + 1);
// Create a new dEdx hit
if (drRegion) {
,det
,hits
,qTot
+ ,gMC->TrackTime()*1.0e06
,kTRUE);
}
else {
,det
,hits
,qTot
+ ,gMC->TrackTime()*1.0e06
,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;
+ }
+
+ // 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 > 0.0) {
- do {
- gMC->GetRandom()->RndmArray(1,random);
- }
- while ((random[0] == 1.0) ||
- (random[0] == 0.0));
- stepSize = - TMath::Log(random[0]) / pp;
- gMC->SetMaxStep(stepSize);
+ if (pp > 0.0) {
+ do {
+ gMC->GetRandom()->RndmArray(1,random);
}
-
- }
+ while ((random[0] == 1.0) ||
+ (random[0] == 0.0));
+ stepSize = - TMath::Log(random[0]) / pp;
+ gMC->SetMaxStep(stepSize);
+ }
}
// 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
+ //
+
+ // PDG code electron
+ const Int_t kPdgElectron = 11;
- Int_t pla = 0;
- Int_t cha = 0;
- Int_t sec = 0;
- Int_t det = 0;
+ 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;
+ cIdChamber[2] = 0;
TLorentzVector pos;
TLorentzVector mom;
- const Int_t kNplan = AliTRDgeometry::Nplan();
- const Int_t kNcham = AliTRDgeometry::Ncham();
- const Int_t kNdetsec = kNplan * kNcham;
+ const Int_t kNlayer = AliTRDgeometry::Nlayer();
+ const Int_t kNstack = AliTRDgeometry::Nstack();
+ const Int_t kNdetsec = kNlayer * kNstack;
const Double_t kBig = 1.0e+12;
-
- const Float_t kWion = 23.53; // Ionization energy
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
// If not charged track or already stopped or disappeared, just return.
if ((!gMC->TrackCharge()) ||
- 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)) {
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 < 90.0) {
- phi = phi + 270.0;
- }
- else {
- phi = phi - 90.0;
- }
- sec = ((Int_t) (phi / 20.0));
+ // 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];
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 (!addthishit) {
- return;
- }
+ stack = ((Int_t) idChamber / kNlayer);
+ layer = ((Int_t) idChamber % kNlayer);
// The detector number
- det = fGeometry->GetDetector(pla,cha,sec);
+ det = fGeometry->GetDetector(layer,stack,sector);
// 0: InFlight 1:Entering 2:Exiting
Int_t trkStat = 0;
// 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 ((drRegion) &&
+ (gMC->IsTrackEntering())) {
- 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) &&
+ (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
Int_t i;
Double_t energy = x[0];
+ if (energy >= arre[npts-1]) {
+ return 0.0;
+ }
+
for (i = 0; i < npts; i++) {
if (energy < arre[i]) {
break;
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff