TRD/AliTRDCommonParam.h

   1 #ifndef ALITRDCOMMONPARAM_H
   2 #define ALITRDCOMMONPARAM_H
   3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   4  * See cxx source for full Copyright notice                               */
   5
   6 ///////////////////////////////////////////////////////////////////////////////
   7 //                                                                           //
   8 // Class containing constant common parameters                               //
   9 //                                                                           //
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 /* $Id$ */
  13
  14 #include "TObject.h"
  15
  16 #include "AliTRDSimParam.h"
  17
  18 class TRootIoCtor;
  19
  20 class AliTRDpadPlane;
  21
  22 class AliTRDCommonParam : public TObject
  23 {
  24
  25   public:
  26
  27     enum { kNlayer  = 6
  28          , kNstack  = 5
  29          , kNsector = 18
  30          , kNdet    = 540 };
  31
  32     enum { kXenon =   0
  33          , kArgon =   1   };
  34
  35     AliTRDCommonParam(TRootIoCtor *);
  36     AliTRDCommonParam(const AliTRDCommonParam &p);
  37     AliTRDCommonParam &operator=(const AliTRDCommonParam &p);
  38     virtual        ~AliTRDCommonParam();
  39
  40     static AliTRDCommonParam *Instance();
  41     static  void    Terminate();
  42
  43     virtual void    Copy(TObject &p) const;
  44
  45     void            SetExB(Int_t exbOn = 1)                        { fExBOn             = exbOn;    }
  46     void            SetSamplingFrequency(Float_t freq)             { fSamplingFrequency = freq;     }
  47     void            SetXenon()                                     { fGasMixture        = kXenon;
  48                                                                      AliTRDSimParam::Instance()->ReInit(); }
  49     void            SetArgon()                                     { fGasMixture        = kArgon;
  50                                                                      AliTRDSimParam::Instance()->ReInit(); }
  51
  52     Bool_t          ExBOn() const                                  { return fExBOn;                 }
  53     Bool_t          IsXenon() const                                { return (fGasMixture == kXenon)
  54                                                                      ? kTRUE : kFALSE;              }
  55     Bool_t          IsArgon() const                                { return (fGasMixture == kArgon)
  56                                                                      ? kTRUE : kFALSE;              }
  57
  58     Int_t           GetGasMixture() const                          { return fGasMixture;            }
  59     Float_t         GetSamplingFrequency() const                   { return fSamplingFrequency;     }
  60
  61     Float_t         GetOmegaTau(Float_t vdrift);
  62     Bool_t          GetDiffCoeff(Float_t &dl, Float_t &dt, Float_t vdrift);
  63
  64     Double_t        TimeStruct(Float_t vdrift, Double_t xd, Double_t z);
  65
  66   protected:
  67
  68     void            SampleTimeStruct(Float_t vdrift);
  69
  70     static AliTRDCommonParam *fgInstance;          //  Instance of this class (singleton implementation)
  71     static Bool_t             fgTerminated;        //  Defines if this class has already been terminated
  72
  73     Int_t                     fExBOn;              //  Switch for the ExB effects
  74
  75     Float_t                   fDiffusionT;         //  Transverse drift coefficient
  76     Float_t                   fDiffusionL;         //  Longitudinal drift coefficient
  77     Float_t                   fDiffLastVdrift;     //  The structures are valid for fLastVdrift (caching)
  78
  79     Float_t                  *fTimeStruct1;        //! Time Structure of Drift Cells
  80     Float_t                  *fTimeStruct2;        //! Time Structure of Drift Cells
  81     Float_t                   fVDlo;               //  Lower drift velocity, for interpolation
  82     Float_t                   fVDhi;               //  Higher drift velocity, for interpolation
  83     Float_t                   fTimeLastVdrift;     //  The structures are valid for fLastVdrift (caching)
  84
  85     Float_t                   fSamplingFrequency;  //  Sampling Frequency in MHz
  86
  87     Int_t                     fGasMixture;         //  Gas mixture: 0-Xe/C02 1-Ar/CO2.
  88
  89   private:
  90
  91     // This is a singleton, constructor is private!
  92     AliTRDCommonParam();
  93
  94     ClassDef(AliTRDCommonParam,7)                  // The constant parameters common to simulation and reconstruction
  95
  96 };
  97 #endif