+++ /dev/null
-
-/**************************************************************************
- * 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. *
- **************************************************************************/
-
-/* $Id$ */
-
-////////////////////////////////////////////////////////////////////////////
-// //
-// TRD simulation - multimodule (regular rad.) //
-// after: M. CASTELLANO et al., COMP. PHYS. COMM. 51 (1988) 431 //
-// + COMP. PHYS. COMM. 61 (1990) 395 //
-// //
-// 17.07.1998 - A.Andronic //
-// 08.12.1998 - simplified version //
-// 11.07.2000 - Adapted code to aliroot environment (C.Blume) //
-// 04.06.2004 - Momentum dependent parameters implemented (CBL) //
-// //
-////////////////////////////////////////////////////////////////////////////
-
-#include <TH1.h>
-#include <TRandom.h>
-#include <TMath.h>
-#include <TVirtualMC.h>
-#include <TVirtualMCStack.h>
-
-#include "AliModule.h"
-
-#include "AliTRDsimTR.h"
-
-ClassImp(AliTRDsimTR)
-
-//_____________________________________________________________________________
-AliTRDsimTR::AliTRDsimTR()
- :TObject()
- ,fNFoilsDim(0)
- ,fNFoils(0)
- ,fNFoilsUp(0)
- ,fFoilThick(0)
- ,fGapThick(0)
- ,fFoilDens(0)
- ,fGapDens(0)
- ,fFoilOmega(0)
- ,fGapOmega()
- ,fFoilZ(0)
- ,fGapZ(0)
- ,fFoilA(0)
- ,fGapA(0)
- ,fTemp(0)
- ,fSpNBins(0)
- ,fSpRange(0)
- ,fSpBinWidth(0)
- ,fSpLower(0)
- ,fSpUpper(0)
- ,fSigma(0)
- ,fSpectrum(0)
-{
- //
- // AliTRDsimTR default constructor
- //
-
- Init();
-
-}
-
-//_____________________________________________________________________________
-AliTRDsimTR::AliTRDsimTR(AliModule *mod, Int_t foil, Int_t gap)
- :TObject()
- ,fNFoilsDim(0)
- ,fNFoils(0)
- ,fNFoilsUp(0)
- ,fFoilThick(0)
- ,fGapThick(0)
- ,fFoilDens(0)
- ,fGapDens(0)
- ,fFoilOmega(0)
- ,fGapOmega()
- ,fFoilZ(0)
- ,fGapZ(0)
- ,fFoilA(0)
- ,fGapA(0)
- ,fTemp(0)
- ,fSpNBins(0)
- ,fSpRange(0)
- ,fSpBinWidth(0)
- ,fSpLower(0)
- ,fSpUpper(0)
- ,fSigma(0)
- ,fSpectrum(0)
-{
- //
- // AliTRDsimTR constructor. Takes the material properties of the radiator
- // foils and the gas in the gaps from AliModule <mod>.
- // The default number of foils is 100 with a thickness of 20 mu. The
- // thickness of the gaps is 500 mu.
- //
-
- Float_t aFoil;
- Float_t zFoil;
- Float_t rhoFoil;
-
- Float_t aGap;
- Float_t zGap;
- Float_t rhoGap;
-
- Float_t rad;
- Float_t abs;
-
- Char_t name[21];
-
- Init();
-
- mod->AliGetMaterial(foil,name,aFoil,zFoil,rhoFoil,rad,abs);
- mod->AliGetMaterial(gap ,name,aGap ,zGap ,rhoGap ,rad,abs);
-
- fFoilDens = rhoFoil;
- fFoilA = aFoil;
- fFoilZ = zFoil;
- fFoilOmega = Omega(fFoilDens,fFoilZ,fFoilA);
-
- fGapDens = rhoGap;
- fGapA = aGap;
- fGapZ = zGap;
- fGapOmega = Omega(fGapDens ,fGapZ ,fGapA );
-
-}
-
-//_____________________________________________________________________________
-AliTRDsimTR::AliTRDsimTR(const AliTRDsimTR &s)
- :TObject(s)
- ,fNFoilsDim(s.fNFoilsDim)
- ,fNFoils(0)
- ,fNFoilsUp(0)
- ,fFoilThick(s.fFoilThick)
- ,fGapThick(s.fGapThick)
- ,fFoilDens(s.fFoilDens)
- ,fGapDens(s.fGapDens)
- ,fFoilOmega(s.fFoilOmega)
- ,fGapOmega(s.fGapOmega)
- ,fFoilZ(s.fFoilZ)
- ,fGapZ(s.fGapZ)
- ,fFoilA(s.fFoilA)
- ,fGapA(s.fGapA)
- ,fTemp(s.fTemp)
- ,fSpNBins(s.fSpNBins)
- ,fSpRange(s.fSpRange)
- ,fSpBinWidth(s.fSpBinWidth)
- ,fSpLower(s.fSpLower)
- ,fSpUpper(s.fSpUpper)
- ,fSigma(0)
- ,fSpectrum(0)
-{
- //
- // AliTRDsimTR copy constructor
- //
-
- fNFoils = new Int_t[fNFoilsDim];
- for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) {
- fNFoils[iFoil] = ((AliTRDsimTR &) s).fNFoils[iFoil];
- }
-
- fNFoilsUp = new Double_t[fNFoilsDim];
- for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) {
- fNFoilsUp[iFoil] = ((AliTRDsimTR &) s).fNFoilsUp[iFoil];
- }
-
- fSigma = new Double_t[fSpNBins];
- for (Int_t iBin = 0; iBin < fSpNBins; iBin++) {
- fSigma[iBin] = ((AliTRDsimTR &) s).fSigma[iBin];
- }
-
-}
-
-//_____________________________________________________________________________
-AliTRDsimTR::~AliTRDsimTR()
-{
- //
- // AliTRDsimTR destructor
- //
-
- if (fSigma) {
- delete [] fSigma;
- fSigma = 0;
- }
-
- if (fNFoils) {
- delete [] fNFoils;
- fNFoils = 0;
- }
-
- if (fNFoilsUp) {
- delete [] fNFoilsUp;
- fNFoilsUp = 0;
- }
-
- if (fSpectrum) {
- delete fSpectrum;
- fSpectrum = 0;
- }
-
-}
-
-//_____________________________________________________________________________
-AliTRDsimTR &AliTRDsimTR::operator=(const AliTRDsimTR &s)
-{
- //
- // Assignment operator
- //
-
- if (this != &s) ((AliTRDsimTR &) s).Copy(*this);
- this->Init();
-
- return *this;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDsimTR::Copy(TObject &s) const
-{
- //
- // Copy function
- //
-
- ((AliTRDsimTR &) s).fFoilThick = fFoilThick;
- ((AliTRDsimTR &) s).fFoilDens = fFoilDens;
- ((AliTRDsimTR &) s).fFoilOmega = fFoilOmega;
- ((AliTRDsimTR &) s).fFoilZ = fFoilZ;
- ((AliTRDsimTR &) s).fFoilA = fFoilA;
- ((AliTRDsimTR &) s).fGapThick = fGapThick;
- ((AliTRDsimTR &) s).fGapDens = fGapDens;
- ((AliTRDsimTR &) s).fGapOmega = fGapOmega;
- ((AliTRDsimTR &) s).fGapZ = fGapZ;
- ((AliTRDsimTR &) s).fGapA = fGapA;
- ((AliTRDsimTR &) s).fTemp = fTemp;
- ((AliTRDsimTR &) s).fSpNBins = fSpNBins;
- ((AliTRDsimTR &) s).fSpRange = fSpRange;
- ((AliTRDsimTR &) s).fSpBinWidth = fSpBinWidth;
- ((AliTRDsimTR &) s).fSpLower = fSpLower;
- ((AliTRDsimTR &) s).fSpUpper = fSpUpper;
-
- if (((AliTRDsimTR &) s).fNFoils) {
- delete [] ((AliTRDsimTR &) s).fNFoils;
- }
- ((AliTRDsimTR &) s).fNFoils = new Int_t[fNFoilsDim];
- for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) {
- ((AliTRDsimTR &) s).fNFoils[iFoil] = fNFoils[iFoil];
- }
-
- if (((AliTRDsimTR &) s).fNFoilsUp) {
- delete [] ((AliTRDsimTR &) s).fNFoilsUp;
- }
- ((AliTRDsimTR &) s).fNFoilsUp = new Double_t[fNFoilsDim];
- for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) {
- ((AliTRDsimTR &) s).fNFoilsUp[iFoil] = fNFoilsUp[iFoil];
- }
-
- if (((AliTRDsimTR &) s).fSigma) {
- delete [] ((AliTRDsimTR &) s).fSigma;
- }
- ((AliTRDsimTR &) s).fSigma = new Double_t[fSpNBins];
- for (Int_t iBin = 0; iBin < fSpNBins; iBin++) {
- ((AliTRDsimTR &) s).fSigma[iBin] = fSigma[iBin];
- }
-
-}
-
-//_____________________________________________________________________________
-void AliTRDsimTR::Init()
-{
- //
- // Initialization
- // The default radiator are prolypropilene foils of 10 mu thickness
- // with gaps of 80 mu filled with N2.
- //
-
- fNFoilsDim = 7;
-
- if (fNFoils) {
- delete [] fNFoils;
- }
- fNFoils = new Int_t[fNFoilsDim];
- fNFoils[0] = 170;
- fNFoils[1] = 225;
- fNFoils[2] = 275;
- fNFoils[3] = 305;
- fNFoils[4] = 325;
- fNFoils[5] = 340;
- fNFoils[6] = 350;
-
- if (fNFoilsUp) {
- delete [] fNFoilsUp;
- }
- fNFoilsUp = new Double_t[fNFoilsDim];
- fNFoilsUp[0] = 1.25;
- fNFoilsUp[1] = 1.75;
- fNFoilsUp[2] = 2.50;
- fNFoilsUp[3] = 3.50;
- fNFoilsUp[4] = 4.50;
- fNFoilsUp[5] = 5.50;
- fNFoilsUp[6] = 10000.0;
-
- fFoilThick = 0.0013;
- fFoilDens = 0.92;
- fFoilZ = 5.28571;
- fFoilA = 10.4286;
- fFoilOmega = Omega(fFoilDens,fFoilZ,fFoilA);
-
- fGapThick = 0.0060;
- fGapDens = 0.00125;
- fGapZ = 7.0;
- fGapA = 14.00674;
- fGapOmega = Omega(fGapDens ,fGapZ ,fGapA );
-
- fTemp = 293.16;
-
- fSpNBins = 200;
- fSpRange = 100;
- fSpBinWidth = fSpRange / fSpNBins;
- fSpLower = 1.0 - 0.5 * fSpBinWidth;
- fSpUpper = fSpLower + fSpRange;
-
- if (fSpectrum) delete fSpectrum;
- fSpectrum = new TH1D("TRspectrum","TR spectrum",fSpNBins,fSpLower,fSpUpper);
- fSpectrum->SetDirectory(0);
-
- // Set the sigma values
- SetSigma();
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDsimTR::CreatePhotons(Int_t pdg, Float_t p
- , Int_t &nPhoton, Float_t *ePhoton)
-{
- //
- // Create TRD photons for a charged particle of type <pdg> with the total
- // momentum <p>.
- // Number of produced TR photons: <nPhoton>
- // Energies of the produced TR photons: <ePhoton>
- //
-
- // PDG codes
- const Int_t kPdgEle = 11;
- const Int_t kPdgMuon = 13;
- const Int_t kPdgPion = 211;
- const Int_t kPdgKaon = 321;
-
- Float_t mass = 0;
- switch (TMath::Abs(pdg)) {
- case kPdgEle:
- mass = 5.11e-4;
- break;
- case kPdgMuon:
- mass = 0.10566;
- break;
- case kPdgPion:
- mass = 0.13957;
- break;
- case kPdgKaon:
- mass = 0.4937;
- break;
- default:
- return 0;
- break;
- };
-
- // Calculate the TR photons
- return TrPhotons(p, mass, nPhoton, ePhoton);
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDsimTR::TrPhotons(Float_t p, Float_t mass
- , Int_t &nPhoton, Float_t *ePhoton)
-{
- //
- // Produces TR photons using a parametric model for regular radiator. Photons
- // with energy larger than 15 keV are included in the MC stack and tracked by VMC
- // machinary.
- //
- // Input parameters:
- // p - parent momentum [GeV/c]
- // mass - parent mass
- //
- // Output :
- // nPhoton - number of photons which have to be processed by custom code
- // ePhoton - energy of this photons in keV.
- //
-
- const Double_t kAlpha = 0.0072973;
- const Int_t kSumMax = 30;
-
- Double_t tau = fGapThick / fFoilThick;
-
- // Calculate gamma
- Double_t gamma = TMath::Sqrt(p*p + mass*mass) / mass;
-
- // Select the number of foils corresponding to momentum
- Int_t foils = SelectNFoils(p);
-
- fSpectrum->Reset();
-
- // The TR spectrum
- Double_t csi1;
- Double_t csi2;
- Double_t rho1;
- Double_t rho2;
- Double_t sigma;
- Double_t sum;
- Double_t nEqu;
- Double_t thetaN;
- Double_t aux;
- Double_t energyeV;
- Double_t energykeV;
- for (Int_t iBin = 1; iBin <= fSpNBins; iBin++) {
-
- energykeV = fSpectrum->GetBinCenter(iBin);
- energyeV = energykeV * 1.0e3;
-
- sigma = Sigma(energykeV);
-
- csi1 = fFoilOmega / energyeV;
- csi2 = fGapOmega / energyeV;
-
- rho1 = 2.5 * energyeV * fFoilThick * 1.0e4
- * (1.0 / (gamma*gamma) + csi1*csi1);
- rho2 = 2.5 * energyeV * fFoilThick * 1.0e4
- * (1.0 / (gamma*gamma) + csi2 *csi2);
-
- // Calculate the sum
- sum = 0.0;
- for (Int_t n = 1; n <= kSumMax; n++) {
- thetaN = (TMath::Pi() * 2.0 * n - (rho1 + tau * rho2)) / (1.0 + tau);
- if (thetaN < 0.0) {
- thetaN = 0.0;
- }
- aux = 1.0 / (rho1 + thetaN) - 1.0 / (rho2 + thetaN);
- sum += thetaN * (aux*aux) * (1.0 - TMath::Cos(rho1 + thetaN));
- }
-
- // Equivalent number of foils
- nEqu = (1.0 - TMath::Exp(-foils * sigma)) / (1.0 - TMath::Exp(-sigma));
-
- // dN / domega
- fSpectrum->SetBinContent(iBin,4.0 * kAlpha * nEqu * sum / (energykeV * (1.0 + tau)));
-
- }
-
- // <nTR> (binsize corr.)
- Float_t nTr = fSpBinWidth * fSpectrum->Integral();
- // Number of TR photons from Poisson distribution with mean <nTr>
- Int_t nPhCand = gRandom->Poisson(nTr);
-
- // Link the MC stack and get info about parent electron
- TVirtualMCStack *stack = TVirtualMC::GetMC()->GetStack();
- Int_t track = stack->GetCurrentTrackNumber();
- Double_t px, py, pz, ptot;
- TVirtualMC::GetMC()->TrackMomentum(px,py,pz,ptot);
- ptot = TMath::Sqrt(px*px+py*py+pz*pz);
- px /= ptot;
- py /= ptot;
- pz /= ptot;
-
- // Current position of electron
- Double_t x;
- Double_t y;
- Double_t z;
- TVirtualMC::GetMC()->TrackPosition(x,y,z);
- Double_t t = TVirtualMC::GetMC()->TrackTime();
-
- // Counter for TR analysed in custom code (e < 15keV)
- nPhoton = 0;
-
- for (Int_t iPhoton = 0; iPhoton < nPhCand; iPhoton++) {
-
- // Energy of the TR photon
- Double_t e = fSpectrum->GetRandom();
-
- // Put TR photon on particle stack
- if (e > 15.0) {
-
- e *= 1.0e-6; // Convert it to GeV
-
- Int_t phtrack;
- stack->PushTrack(1 // Must be 1
- ,track // Identifier of the parent track, -1 for a primary
- ,22 // Particle code.
- ,px*e // 4 momentum (The photon is generated on the same
- ,py*e // direction as the parent. For irregular radiator one
- ,pz*e // can calculate also the angle but this is a secondary
- ,e // order effect)
- ,x,y,z,t // 4 vertex
- ,0.0,0.0,0.0 // Polarisation
- ,kPFeedBackPhoton // Production mechanism (there is no TR in G3 so one
- // has to make some convention)
- ,phtrack // On output the number of the track stored
- ,1.0
- ,1);
-
- }
- // Custom treatment of TR photons
- else {
-
- ePhoton[nPhoton++] = e;
-
- }
-
- }
-
- return 1;
-
-}
-
-//_____________________________________________________________________________
-void AliTRDsimTR::SetSigma()
-{
- //
- // Sets the absorbtion crosssection for the energies of the TR spectrum
- //
-
- if (fSigma) {
- delete [] fSigma;
- }
- fSigma = new Double_t[fSpNBins];
-
- for (Int_t iBin = 0; iBin < fSpNBins; iBin++) {
- Double_t energykeV = iBin * fSpBinWidth + 1.0;
- fSigma[iBin] = Sigma(energykeV);
- }
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::Sigma(Double_t energykeV)
-{
- //
- // Calculates the absorbtion crosssection for a one-foil-one-gap-radiator
- //
-
- // keV -> MeV
- Double_t energyMeV = energykeV * 0.001;
- if (energyMeV >= 0.001) {
- return(GetMuPo(energyMeV) * fFoilDens * fFoilThick +
- GetMuAi(energyMeV) * fGapDens * fGapThick * GetTemp());
- }
- else {
- return 1.0e6;
- }
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuPo(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for polypropylene
- //
-
- const Int_t kN = 36;
-
- Double_t mu[kN] = { 1.894E+03, 5.999E+02, 2.593E+02
- , 7.743E+01, 3.242E+01, 1.643E+01
- , 9.432E+00, 3.975E+00, 2.088E+00
- , 7.452E-01, 4.315E-01, 2.706E-01
- , 2.275E-01, 2.084E-01, 1.970E-01
- , 1.823E-01, 1.719E-01, 1.534E-01
- , 1.402E-01, 1.217E-01, 1.089E-01
- , 9.947E-02, 9.198E-02, 8.078E-02
- , 7.262E-02, 6.495E-02, 5.910E-02
- , 5.064E-02, 4.045E-02, 3.444E-02
- , 3.045E-02, 2.760E-02, 2.383E-02
- , 2.145E-02, 1.819E-02, 1.658E-02 };
-
- Double_t en[kN] = { 1.000E-03, 1.500E-03, 2.000E-03
- , 3.000E-03, 4.000E-03, 5.000E-03
- , 6.000E-03, 8.000E-03, 1.000E-02
- , 1.500E-02, 2.000E-02, 3.000E-02
- , 4.000E-02, 5.000E-02, 6.000E-02
- , 8.000E-02, 1.000E-01, 1.500E-01
- , 2.000E-01, 3.000E-01, 4.000E-01
- , 5.000E-01, 6.000E-01, 8.000E-01
- , 1.000E+00, 1.250E+00, 1.500E+00
- , 2.000E+00, 3.000E+00, 4.000E+00
- , 5.000E+00, 6.000E+00, 8.000E+00
- , 1.000E+01, 1.500E+01, 2.000E+01 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuCO(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for CO2
- //
-
- const Int_t kN = 36;
-
- Double_t mu[kN] = { 0.39383E+04, 0.13166E+04, 0.58750E+03
- , 0.18240E+03, 0.77996E+02, 0.40024E+02
- , 0.23116E+02, 0.96997E+01, 0.49726E+01
- , 0.15543E+01, 0.74915E+00, 0.34442E+00
- , 0.24440E+00, 0.20589E+00, 0.18632E+00
- , 0.16578E+00, 0.15394E+00, 0.13558E+00
- , 0.12336E+00, 0.10678E+00, 0.95510E-01
- , 0.87165E-01, 0.80587E-01, 0.70769E-01
- , 0.63626E-01, 0.56894E-01, 0.51782E-01
- , 0.44499E-01, 0.35839E-01, 0.30825E-01
- , 0.27555E-01, 0.25269E-01, 0.22311E-01
- , 0.20516E-01, 0.18184E-01, 0.17152E-01 };
-
- Double_t en[kN] = { 0.10000E-02, 0.15000E-02, 0.20000E-02
- , 0.30000E-02, 0.40000E-02, 0.50000E-02
- , 0.60000E-02, 0.80000E-02, 0.10000E-01
- , 0.15000E-01, 0.20000E-01, 0.30000E-01
- , 0.40000E-01, 0.50000E-01, 0.60000E-01
- , 0.80000E-01, 0.10000E+00, 0.15000E+00
- , 0.20000E+00, 0.30000E+00, 0.40000E+00
- , 0.50000E+00, 0.60000E+00, 0.80000E+00
- , 0.10000E+01, 0.12500E+01, 0.15000E+01
- , 0.20000E+01, 0.30000E+01, 0.40000E+01
- , 0.50000E+01, 0.60000E+01, 0.80000E+01
- , 0.10000E+02, 0.15000E+02, 0.20000E+02 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuXe(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for xenon
- //
-
- const Int_t kN = 48;
-
- Double_t mu[kN] = { 9.413E+03, 8.151E+03, 7.035E+03
- , 7.338E+03, 4.085E+03, 2.088E+03
- , 7.780E+02, 3.787E+02, 2.408E+02
- , 6.941E+02, 6.392E+02, 6.044E+02
- , 8.181E+02, 7.579E+02, 6.991E+02
- , 8.064E+02, 6.376E+02, 3.032E+02
- , 1.690E+02, 5.743E+01, 2.652E+01
- , 8.930E+00, 6.129E+00, 3.316E+01
- , 2.270E+01, 1.272E+01, 7.825E+00
- , 3.633E+00, 2.011E+00, 7.202E-01
- , 3.760E-01, 1.797E-01, 1.223E-01
- , 9.699E-02, 8.281E-02, 6.696E-02
- , 5.785E-02, 5.054E-02, 4.594E-02
- , 4.078E-02, 3.681E-02, 3.577E-02
- , 3.583E-02, 3.634E-02, 3.797E-02
- , 3.987E-02, 4.445E-02, 4.815E-02 };
-
- Double_t en[kN] = { 1.00000E-03, 1.07191E-03, 1.14900E-03
- , 1.14900E-03, 1.50000E-03, 2.00000E-03
- , 3.00000E-03, 4.00000E-03, 4.78220E-03
- , 4.78220E-03, 5.00000E-03, 5.10370E-03
- , 5.10370E-03, 5.27536E-03, 5.45280E-03
- , 5.45280E-03, 6.00000E-03, 8.00000E-03
- , 1.00000E-02, 1.50000E-02, 2.00000E-02
- , 3.00000E-02, 3.45614E-02, 3.45614E-02
- , 4.00000E-02, 5.00000E-02, 6.00000E-02
- , 8.00000E-02, 1.00000E-01, 1.50000E-01
- , 2.00000E-01, 3.00000E-01, 4.00000E-01
- , 5.00000E-01, 6.00000E-01, 8.00000E-01
- , 1.00000E+00, 1.25000E+00, 1.50000E+00
- , 2.00000E+00, 3.00000E+00, 4.00000E+00
- , 5.00000E+00, 6.00000E+00, 8.00000E+00
- , 1.00000E+01, 1.50000E+01, 2.00000E+01 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuAr(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for argon
- //
-
- const Int_t kN = 38;
-
- Double_t mu[kN] = { 3.184E+03, 1.105E+03, 5.120E+02
- , 1.703E+02, 1.424E+02, 1.275E+03
- , 7.572E+02, 4.225E+02, 2.593E+02
- , 1.180E+02, 6.316E+01, 1.983E+01
- , 8.629E+00, 2.697E+00, 1.228E+00
- , 7.012E-01, 4.664E-01, 2.760E-01
- , 2.043E-01, 1.427E-01, 1.205E-01
- , 9.953E-02, 8.776E-02, 7.958E-02
- , 7.335E-02, 6.419E-02, 5.762E-02
- , 5.150E-02, 4.695E-02, 4.074E-02
- , 3.384E-02, 3.019E-02, 2.802E-02
- , 2.667E-02, 2.517E-02, 2.451E-02
- , 2.418E-02, 2.453E-02 };
-
- Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03
- , 3.00000E-03, 3.20290E-03, 3.20290E-03
- , 4.00000E-03, 5.00000E-03, 6.00000E-03
- , 8.00000E-03, 1.00000E-02, 1.50000E-02
- , 2.00000E-02, 3.00000E-02, 4.00000E-02
- , 5.00000E-02, 6.00000E-02, 8.00000E-02
- , 1.00000E-01, 1.50000E-01, 2.00000E-01
- , 3.00000E-01, 4.00000E-01, 5.00000E-01
- , 6.00000E-01, 8.00000E-01, 1.00000E+00
- , 1.25000E+00, 1.50000E+00, 2.00000E+00
- , 3.00000E+00, 4.00000E+00, 5.00000E+00
- , 6.00000E+00, 8.00000E+00, 1.00000E+01
- , 1.50000E+01, 2.00000E+01 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuMy(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for mylar
- //
-
- const Int_t kN = 36;
-
- Double_t mu[kN] = { 2.911E+03, 9.536E+02, 4.206E+02
- , 1.288E+02, 5.466E+01, 2.792E+01
- , 1.608E+01, 6.750E+00, 3.481E+00
- , 1.132E+00, 5.798E-01, 3.009E-01
- , 2.304E-01, 2.020E-01, 1.868E-01
- , 1.695E-01, 1.586E-01, 1.406E-01
- , 1.282E-01, 1.111E-01, 9.947E-02
- , 9.079E-02, 8.395E-02, 7.372E-02
- , 6.628E-02, 5.927E-02, 5.395E-02
- , 4.630E-02, 3.715E-02, 3.181E-02
- , 2.829E-02, 2.582E-02, 2.257E-02
- , 2.057E-02, 1.789E-02, 1.664E-02 };
-
- Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03
- , 3.00000E-03, 4.00000E-03, 5.00000E-03
- , 6.00000E-03, 8.00000E-03, 1.00000E-02
- , 1.50000E-02, 2.00000E-02, 3.00000E-02
- , 4.00000E-02, 5.00000E-02, 6.00000E-02
- , 8.00000E-02, 1.00000E-01, 1.50000E-01
- , 2.00000E-01, 3.00000E-01, 4.00000E-01
- , 5.00000E-01, 6.00000E-01, 8.00000E-01
- , 1.00000E+00, 1.25000E+00, 1.50000E+00
- , 2.00000E+00, 3.00000E+00, 4.00000E+00
- , 5.00000E+00, 6.00000E+00, 8.00000E+00
- , 1.00000E+01, 1.50000E+01, 2.00000E+01 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuN2(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for nitrogen
- //
-
- const Int_t kN = 36;
-
- Double_t mu[kN] = { 3.311E+03, 1.083E+03, 4.769E+02
- , 1.456E+02, 6.166E+01, 3.144E+01
- , 1.809E+01, 7.562E+00, 3.879E+00
- , 1.236E+00, 6.178E-01, 3.066E-01
- , 2.288E-01, 1.980E-01, 1.817E-01
- , 1.639E-01, 1.529E-01, 1.353E-01
- , 1.233E-01, 1.068E-01, 9.557E-02
- , 8.719E-02, 8.063E-02, 7.081E-02
- , 6.364E-02, 5.693E-02, 5.180E-02
- , 4.450E-02, 3.579E-02, 3.073E-02
- , 2.742E-02, 2.511E-02, 2.209E-02
- , 2.024E-02, 1.782E-02, 1.673E-02 };
-
- Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03
- , 3.00000E-03, 4.00000E-03, 5.00000E-03
- , 6.00000E-03, 8.00000E-03, 1.00000E-02
- , 1.50000E-02, 2.00000E-02, 3.00000E-02
- , 4.00000E-02, 5.00000E-02, 6.00000E-02
- , 8.00000E-02, 1.00000E-01, 1.50000E-01
- , 2.00000E-01, 3.00000E-01, 4.00000E-01
- , 5.00000E-01, 6.00000E-01, 8.00000E-01
- , 1.00000E+00, 1.25000E+00, 1.50000E+00
- , 2.00000E+00, 3.00000E+00, 4.00000E+00
- , 5.00000E+00, 6.00000E+00, 8.00000E+00
- , 1.00000E+01, 1.50000E+01, 2.00000E+01 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuO2(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for oxygen
- //
-
- const Int_t kN = 36;
-
- Double_t mu[kN] = { 4.590E+03, 1.549E+03, 6.949E+02
- , 2.171E+02, 9.315E+01, 4.790E+01
- , 2.770E+01, 1.163E+01, 5.952E+00
- , 1.836E+00, 8.651E-01, 3.779E-01
- , 2.585E-01, 2.132E-01, 1.907E-01
- , 1.678E-01, 1.551E-01, 1.361E-01
- , 1.237E-01, 1.070E-01, 9.566E-02
- , 8.729E-02, 8.070E-02, 7.087E-02
- , 6.372E-02, 5.697E-02, 5.185E-02
- , 4.459E-02, 3.597E-02, 3.100E-02
- , 2.777E-02, 2.552E-02, 2.263E-02
- , 2.089E-02, 1.866E-02, 1.770E-02 };
-
- Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03
- , 3.00000E-03, 4.00000E-03, 5.00000E-03
- , 6.00000E-03, 8.00000E-03, 1.00000E-02
- , 1.50000E-02, 2.00000E-02, 3.00000E-02
- , 4.00000E-02, 5.00000E-02, 6.00000E-02
- , 8.00000E-02, 1.00000E-01, 1.50000E-01
- , 2.00000E-01, 3.00000E-01, 4.00000E-01
- , 5.00000E-01, 6.00000E-01, 8.00000E-01
- , 1.00000E+00, 1.25000E+00, 1.50000E+00
- , 2.00000E+00, 3.00000E+00, 4.00000E+00
- , 5.00000E+00, 6.00000E+00, 8.00000E+00
- , 1.00000E+01, 1.50000E+01, 2.00000E+01 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuHe(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for helium
- //
-
- const Int_t kN = 36;
-
- Double_t mu[kN] = { 6.084E+01, 1.676E+01, 6.863E+00
- , 2.007E+00, 9.329E-01, 5.766E-01
- , 4.195E-01, 2.933E-01, 2.476E-01
- , 2.092E-01, 1.960E-01, 1.838E-01
- , 1.763E-01, 1.703E-01, 1.651E-01
- , 1.562E-01, 1.486E-01, 1.336E-01
- , 1.224E-01, 1.064E-01, 9.535E-02
- , 8.707E-02, 8.054E-02, 7.076E-02
- , 6.362E-02, 5.688E-02, 5.173E-02
- , 4.422E-02, 3.503E-02, 2.949E-02
- , 2.577E-02, 2.307E-02, 1.940E-02
- , 1.703E-02, 1.363E-02, 1.183E-02 };
-
- Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03
- , 3.00000E-03, 4.00000E-03, 5.00000E-03
- , 6.00000E-03, 8.00000E-03, 1.00000E-02
- , 1.50000E-02, 2.00000E-02, 3.00000E-02
- , 4.00000E-02, 5.00000E-02, 6.00000E-02
- , 8.00000E-02, 1.00000E-01, 1.50000E-01
- , 2.00000E-01, 3.00000E-01, 4.00000E-01
- , 5.00000E-01, 6.00000E-01, 8.00000E-01
- , 1.00000E+00, 1.25000E+00, 1.50000E+00
- , 2.00000E+00, 3.00000E+00, 4.00000E+00
- , 5.00000E+00, 6.00000E+00, 8.00000E+00
- , 1.00000E+01, 1.50000E+01, 2.00000E+01 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::GetMuAi(Double_t energyMeV)
-{
- //
- // Returns the photon absorbtion cross section for air
- // Implemented by Oliver Busch
- //
-
- const Int_t kN = 38;
-
- Double_t mu[kN] = { 0.35854E+04, 0.11841E+04, 0.52458E+03,
- 0.16143E+03, 0.14250E+03, 0.15722E+03,
- 0.77538E+02, 0.40099E+02, 0.23313E+02,
- 0.98816E+01, 0.51000E+01, 0.16079E+01,
- 0.77536E+00, 0.35282E+00, 0.24790E+00,
- 0.20750E+00, 0.18703E+00, 0.16589E+00,
- 0.15375E+00, 0.13530E+00, 0.12311E+00,
- 0.10654E+00, 0.95297E-01, 0.86939E-01,
- 0.80390E-01, 0.70596E-01, 0.63452E-01,
- 0.56754E-01, 0.51644E-01, 0.44382E-01,
- 0.35733E-01, 0.30721E-01, 0.27450E-01,
- 0.25171E-01, 0.22205E-01, 0.20399E-01,
- 0.18053E-01, 0.18057E-01 };
-
-
-
- Double_t en[kN] = { 0.10000E-02, 0.15000E-02, 0.20000E-02,
- 0.30000E-02, 0.32029E-02, 0.32029E-02,
- 0.40000E-02, 0.50000E-02, 0.60000E-02,
- 0.80000E-02, 0.10000E-01, 0.15000E-01,
- 0.20000E-01, 0.30000E-01, 0.40000E-01,
- 0.50000E-01, 0.60000E-01, 0.80000E-01,
- 0.10000E+00, 0.15000E+00, 0.20000E+00,
- 0.30000E+00, 0.40000E+00, 0.50000E+00,
- 0.60000E+00, 0.80000E+00, 0.10000E+01,
- 0.12500E+01, 0.15000E+01, 0.20000E+01,
- 0.30000E+01, 0.40000E+01, 0.50000E+01,
- 0.60000E+01, 0.80000E+01, 0.10000E+02,
- 0.15000E+02, 0.20000E+02 };
-
- return Interpolate(energyMeV,en,mu,kN);
-
-}
-
-//_____________________________________________________________________________
-Double_t AliTRDsimTR::Interpolate(Double_t energyMeV
- , Double_t *en
- , const Double_t * const mu
- , Int_t n)
-{
- //
- // Interpolates the photon absorbtion cross section
- // for a given energy <energyMeV>.
- //
-
- Double_t de = 0;
- Int_t index = 0;
- Int_t istat = Locate(en,n,energyMeV,index,de);
- if (istat == 0) {
- return (mu[index] - de * (mu[index] - mu[index+1])
- / (en[index+1] - en[index] ));
- }
- else {
- return 0.0;
- }
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDsimTR::Locate(Double_t *xv, Int_t n, Double_t xval
- , Int_t &kl, Double_t &dx)
-{
- //
- // Locates a point (xval) in a 1-dim grid (xv(n))
- //
-
- if (xval >= xv[n-1]) {
- return 1;
- }
- if (xval < xv[0]) {
- return -1;
- }
-
- Int_t km;
- Int_t kh = n - 1;
-
- kl = 0;
- while (kh - kl > 1) {
- if (xval < xv[km = (kl+kh)/2]) {
- kh = km;
- }
- else {
- kl = km;
- }
- }
- if ((xval < xv[kl]) ||
- (xval > xv[kl+1]) ||
- (kl >= n-1)) {
- AliFatal(Form("Locate failed xv[%d] %f xval %f xv[%d] %f!!!\n"
- ,kl,xv[kl],xval,kl+1,xv[kl+1]));
- exit(1);
- }
-
- dx = xval - xv[kl];
-
- return 0;
-
-}
-
-//_____________________________________________________________________________
-Int_t AliTRDsimTR::SelectNFoils(Float_t p) const
-{
- //
- // Selects the number of foils corresponding to the momentum
- //
-
- Int_t foils = fNFoils[fNFoilsDim-1];
-
- for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) {
- if (p < fNFoilsUp[iFoil]) {
- foils = fNFoils[iFoil];
- break;
- }
- }
-
- return foils;
-
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff