X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TRD%2FAliTRDCommonParam.h;h=9e734e4472c9eccf8187a3e9af2b3becf02f3253;hb=f1c1204db4914a19f49337ab4cfbca57ad086d96;hp=3590982cc50f1e7206b1bb35a2acd0e9f62ea493;hpb=053767a494091eeffd93c81d4c088dde743b7fdb;p=u%2Fmrichter%2FAliRoot.git

diff --git a/TRD/AliTRDCommonParam.h b/TRD/AliTRDCommonParam.h
index 3590982cc50..9e734e4472c 100644
--- a/TRD/AliTRDCommonParam.h
+++ b/TRD/AliTRDCommonParam.h
@@ -13,6 +13,8 @@
 
 #include "TObject.h"
 
+#include "AliTRDSimParam.h"
+
 class TRootIoCtor;
 
 class AliTRDpadPlane;
@@ -22,7 +24,13 @@ class AliTRDCommonParam : public TObject
 
   public:
   
-    enum { kNlayer = 6, kNstack = 5, kNsector = 18, kNdet = 540 };
+    enum { kNlayer  = 6
+         , kNstack  = 5
+         , kNsector = 18
+         , kNdet    = 540 };
+
+    enum { kXenon =   0
+	 , kArgon =   1   };
     
     AliTRDCommonParam(TRootIoCtor *);
     AliTRDCommonParam(const AliTRDCommonParam &p);   
@@ -34,31 +42,56 @@ class AliTRDCommonParam : public TObject
 
     virtual void    Copy(TObject &p) const;
     
-    void            SetExB(Int_t exbOn = 1)                        { fExBOn             = exbOn; }
-    void            SetSamplingFrequency(Float_t freq)             { fSamplingFrequency = freq;  }
-    
-    Bool_t          ExBOn() const                                  { return fExBOn;              }
-    
-    Float_t         GetSamplingFrequency() const                   { return fSamplingFrequency;  }
+    void            SetExB(Int_t exbOn = 1)                        { fExBOn             = exbOn;    }
+    void            SetSamplingFrequency(Float_t freq)             { fSamplingFrequency = freq;     }
+    void            SetXenon()                                     { fGasMixture        = kXenon; 
+                                                                     AliTRDSimParam::Instance()->ReInit(); }
+    void            SetArgon()                                     { fGasMixture        = kArgon; 
+                                                                     AliTRDSimParam::Instance()->ReInit(); }
+
+    Bool_t          ExBOn() const                                  { return fExBOn;                 }
+    Bool_t          IsXenon() const                                { return (fGasMixture == kXenon) 
+                                                                     ? kTRUE : kFALSE;              }
+    Bool_t          IsArgon() const                                { return (fGasMixture == kArgon) 
+                                                                     ? kTRUE : kFALSE;              }
+
+    Int_t           GetGasMixture() const                          { return fGasMixture;            }
+    Float_t         GetSamplingFrequency() const                   { return fSamplingFrequency;     }
+
+    Float_t         GetOmegaTau(Float_t vdrift);
+    Bool_t          GetDiffCoeff(Float_t &dl, Float_t &dt, Float_t vdrift);
+
+    Double_t        TimeStruct(Float_t vdrift, Double_t xd, Double_t z);
 
   protected:
 
-    static AliTRDCommonParam *fgInstance;         //  Instance of this class (singleton implementation)
-    static Bool_t             fgTerminated;       //  Defines if this class has already been terminated
-    
-    void Init();
-    
-    Int_t                     fExBOn;             //  Switch for the ExB effects
+    void            SampleTimeStruct(Float_t vdrift);
+
+    static AliTRDCommonParam *fgInstance;          //  Instance of this class (singleton implementation)
+    static Bool_t             fgTerminated;        //  Defines if this class has already been terminated    
+
+    Int_t                     fExBOn;              //  Switch for the ExB effects
 
-    Float_t                   fSamplingFrequency; //  Sampling Frequency in MHz
+    Float_t                   fDiffusionT;         //  Transverse drift coefficient
+    Float_t                   fDiffusionL;         //  Longitudinal drift coefficient
+    Float_t                   fDiffLastVdrift;     //  The structures are valid for fLastVdrift (caching)
+
+    Float_t                  *fTimeStruct1;        //! Time Structure of Drift Cells
+    Float_t                  *fTimeStruct2;        //! Time Structure of Drift Cells
+    Float_t                   fVDlo;               //  Lower drift velocity, for interpolation
+    Float_t                   fVDhi;               //  Higher drift velocity, for interpolation
+    Float_t                   fTimeLastVdrift;     //  The structures are valid for fLastVdrift (caching)
+
+    Float_t                   fSamplingFrequency;  //  Sampling Frequency in MHz
+
+    Int_t                     fGasMixture;         //  Gas mixture: 0-Xe/C02 1-Ar/CO2. 
   
   private:
 
     // This is a singleton, constructor is private!  
     AliTRDCommonParam();
   
-    ClassDef(AliTRDCommonParam,4)                  // The constant parameters common to simulation and reconstruction
+    ClassDef(AliTRDCommonParam,7)                  // The constant parameters common to simulation and reconstruction
 
 };
-
 #endif