1 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
2 * See cxx source for full Copyright notice */
4 /// \class AliTPCExBFirst
5 /// \brief An approximate (first order) implementation of the ExB effect.
7 #ifndef ALITPCEXBFIRST_H
8 #define ALITPCEXBFIRST_H
10 #include "AliTPCExB.h"
14 class AliTPCExBFirst:public AliTPCExB {
17 // AliTPCExBFirst(const AliFieldMap *bFieldMap,Double_t driftVelocity);
18 AliTPCExBFirst(const AliMagF *bField,Double_t driftVelocity,
19 Int_t nx=100,Int_t ny=100,Int_t nz=100);
20 virtual ~AliTPCExBFirst();
21 virtual void Correct(const Double_t *position,Double_t *corrected);
22 void TestThisBeautifulObject(const char* fileName);
23 void SetDriftVelocity(Double_t driftVelocity) {
24 fDriftVelocity=driftVelocity;
27 Double_t fDriftVelocity; ///< The electron drift velocity.
29 AliTPCExBFirst& operator=(const AliTPCExBFirst&); // don't assign me
30 AliTPCExBFirst(const AliTPCExBFirst&); // don't copy me
31 // void ConstructCommon(const AliFieldMap *bFieldMap,const AliMagF *bField);
32 void ConstructCommon(const AliMagF *bField);
33 void GetMeanFields(Double_t rx,Double_t ry,Double_t rz,
34 Double_t *Bx,Double_t *By) const;
35 Int_t fkNX; ///< field mesh points in x direction
36 Int_t fkNY; ///< field mesh points in y direction
37 Int_t fkNZ; ///< field mesh points in z direction
38 Double_t fkXMin; ///< the first grid point in x direction
39 Double_t fkXMax; ///< the last grid point in x direction
40 Double_t fkYMin; ///< the first grid point in y direction
41 Double_t fkYMax; ///< the last grid point in y direction
42 Double_t fkZMin; ///< the first grid point in z direction
43 Double_t fkZMax; ///< the last grid point in z direction
44 Int_t fkNMean; ///< size of the tablE the mean fields
45 /// the mean field in x direction upto a certain z value
46 Double_t *fkMeanBx; //[fkNMean]
47 /// the mean field in y direction upto a certain z value
48 Double_t *fkMeanBy; //[fkNMean]
49 Double_t fkMeanBz; ///< the mean field in z direction inside the TPC volume
50 static const Double_t fgkEM; //!< elementary charge over electron mass (C/kg)
51 static const Double_t fgkDriftField; //!< the TPC drift field (V/m) (modulus)
54 ClassDef(AliTPCExBFirst,2)