TRD/AliTRDsimTR.h

   1 #ifndef ALITRDSIMTR_H
   2 #define ALITRDSIMTR_H
   3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   4  * See cxx source for full Copyright notice                               */
   5
   6 /* $Id$ */
   7
   8 ////////////////////////////////////////////////////////////////////////////
   9 //                                                                        //
  10 //  TRD simulation - multimodule (regular rad.)                           //
  11 //                                                                        //
  12 ////////////////////////////////////////////////////////////////////////////
  13
  14 #include <TObject.h>
  15 #include <TMath.h>
  16
  17 class TH1D;
  18
  19 class AliModule;
  20
  21 class AliTRDsimTR : public TObject {
  22
  23  public:
  24
  25   AliTRDsimTR();
  26   AliTRDsimTR(const AliTRDsimTR &s);
  27   AliTRDsimTR(AliModule *mod, Int_t foil, Int_t gap);
  28   virtual ~AliTRDsimTR();
  29   AliTRDsimTR &operator=(const AliTRDsimTR &s);
  30
  31   virtual void     Copy(TObject &s) const;
  32   virtual void     Init();
  33   virtual Int_t    CreatePhotons(Int_t pdg, Float_t p
  34                                , Int_t &nPhoton, Float_t *ePhoton);
  35   virtual Int_t    TrPhotons(Float_t p, Float_t mass
  36                            , Int_t &nPhoton, Float_t *ePhoton);
  37   virtual Double_t Sigma(Double_t energykeV);
  38   virtual Double_t Interpolate(Double_t energyMeV
  39                              , Double_t *en, const Double_t * const mu, Int_t n);
  40   virtual Int_t    Locate(Double_t *xv, Int_t n, Double_t xval
  41                         , Int_t &kl, Double_t &dx);
  42   virtual Double_t Omega(Float_t rho, Float_t z, Float_t a)  { return (28.8 * TMath::Sqrt(rho * z / a)); };
  43   virtual Int_t    SelectNFoils(Float_t p) const;
  44
  45           void     SetFoilThick(Float_t t)                   { fFoilThick = t;
  46                                                                SetSigma();                                  };
  47           void     SetGapThick(Float_t t)                    { fGapThick  = t;
  48                                                                SetSigma();                                  };
  49           void     SetFoilDens(Float_t d)                    { fFoilDens  = d;
  50                                                                fFoilOmega = Omega(fFoilDens,fFoilZ,fFoilA);
  51                                                                SetSigma();                                  };
  52           void     SetFoilZ(Float_t z)                       { fFoilZ     = z;
  53                                                                fFoilOmega = Omega(fFoilDens,fFoilZ,fFoilA); };
  54           void     SetFoilA(Float_t a)                       { fFoilA     = a;
  55                                                                fFoilOmega = Omega(fFoilDens,fFoilZ,fFoilA); };
  56           void     SetGapDens(Float_t d)                     { fGapDens   = d;
  57                                                                fGapOmega  = Omega(fGapDens ,fGapZ ,fGapA );
  58                                                                SetSigma();                                  };
  59           void     SetGapZ(Float_t z)                        { fGapZ      = z;
  60                                                                fGapOmega  = Omega(fGapDens ,fGapZ ,fGapA ); };
  61           void     SetGapA(Float_t a)                        { fGapA      = a;
  62                                                                fGapOmega  = Omega(fGapDens ,fGapZ ,fGapA ); };
  63           void     SetTemp(Float_t t)                        { fTemp      = t;
  64                                                                SetSigma();                                  };
  65           void     SetSigma();
  66
  67   virtual Double_t GetMuPo(Double_t energyMeV);
  68   virtual Double_t GetMuCO(Double_t energyMeV);
  69   virtual Double_t GetMuXe(Double_t energyMeV);
  70   virtual Double_t GetMuAr(Double_t energyMeV);
  71   virtual Double_t GetMuMy(Double_t energyMeV);
  72   virtual Double_t GetMuN2(Double_t energyMeV);
  73   virtual Double_t GetMuO2(Double_t energyMeV);
  74   virtual Double_t GetMuHe(Double_t energyMeV);
  75   virtual Double_t GetMuAi(Double_t energyMeV);
  76
  77           Float_t  GetFoilThick() const                      { return fFoilThick;     };
  78           Float_t  GetGapThick() const                       { return fGapThick;      };
  79           Float_t  GetFoilDens() const                       { return fFoilDens;      };
  80           Float_t  GetGapDens() const                        { return fGapDens;       };
  81           Double_t GetFoilOmega() const                      { return fFoilOmega;     };
  82           Double_t GetGapOmega() const                       { return fGapOmega;      };
  83           Float_t  GetTemp() const                           { return fTemp / 273.16; };
  84           TH1D    *GetSpectrum() const                       { return fSpectrum;      };
  85
  86  protected:
  87
  88           Int_t     fNFoilsDim;            //  Dimension of the NFoils array
  89           Int_t    *fNFoils;               //[fNFoilsDim] Number of foils in the radiator stack
  90           Double_t *fNFoilsUp;             //[fNFoilsDim] Upper momenta for a given number of foils
  91           Float_t   fFoilThick;            //  Thickness of the foils (cm)
  92           Float_t   fGapThick;             //  Thickness of the gaps between the foils (cm)
  93
  94           Float_t   fFoilDens;             //  Density of the radiator foils (g/cm^3)
  95           Float_t   fGapDens;              //  Density of the gas in the radiator gaps (g/cm^3)
  96
  97           Double_t  fFoilOmega;            //  Plasma frequency of the radiator foils
  98           Double_t  fGapOmega;             //  Plasma frequency of the gas in the radiator gaps
  99
 100           Float_t   fFoilZ;                //  Z of the foil material
 101           Float_t   fGapZ;                 //  Z of the gas in the gaps
 102
 103           Float_t   fFoilA;                //  A of the foil material
 104           Float_t   fGapA;                 //  A of the gas in the gaps
 105
 106           Float_t   fTemp;                 //  Temperature of the radiator gas (Kelvin)
 107
 108           Int_t     fSpNBins;              //  Number of bins of the TR spectrum
 109           Float_t   fSpRange;              //  Range of the TR spectrum
 110           Float_t   fSpBinWidth;           //  Bin width of the TR spectrum
 111           Float_t   fSpLower;              //  Lower border of the TR spectrum
 112           Float_t   fSpUpper;              //  Upper border of the TR spectrum
 113
 114           Double_t *fSigma;                //[fSpNBins] Array of sigma values
 115
 116           TH1D     *fSpectrum;             //! TR photon energy spectrum
 117
 118   ClassDef(AliTRDsimTR,1)                  //  Simulates TR photons
 119
 120 };
 121 #endif