source: trunk/source/geometry/magneticfield/include/G4Mag_SpinEqRhs.hh @ 1340

Last change on this file since 1340 was 1340, checked in by garnier, 14 years ago

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26//
27// $Id: G4Mag_SpinEqRhs.hh,v 1.12 2010/07/14 10:00:36 gcosmo Exp $
28// GEANT4 tag $Name: field-V09-03-03 $
29//
30//
31// class G4Mag_SpinEqRhs
32//
33// Class description:
34//
35// This is the equation of motion for a particle with spin in a pure
36// magnetic field. The three components of the particle's spin are
37// treated utilising BMT equation.
38
39// History:
40// - Created: J.Apostolakis, P.Gumplinger - February 8th, 1999.
41// --------------------------------------------------------------------
42
43#ifndef G4MAG_SPIN_EQRHS
44#define G4MAG_SPIN_EQRHS
45
46#include "G4Types.hh"
47#include "G4Mag_EqRhs.hh"
48
49class G4MagneticField;
50
51class G4Mag_SpinEqRhs : public G4Mag_EqRhs
52{
53   public:  // with description
54
55     G4Mag_SpinEqRhs( G4MagneticField* MagField );
56    ~G4Mag_SpinEqRhs();
57       // Constructor and destructor. No actions.
58
59     void SetChargeMomentumMass(G4double particleCharge, // in e+ units
60                                G4double MomentumXc,
61                                G4double mass); 
62
63     void EvaluateRhsGivenB( const  G4double y[],
64                             const  G4double B[3],
65                                    G4double dydx[] ) const;
66       // Given the value of the magnetic field B, this function
67       // calculates the value of the derivative dydx.
68
69     inline void SetAnomaly(G4double a) { anomaly = a; }
70     inline G4double GetAnomaly() const { return anomaly; }
71       // set/get magnetic anomaly
72
73   private:
74
75     G4double omegac;
76     G4double anomaly;
77     G4double pcharge;
78     G4double E;
79     G4double gamma;
80     G4double beta;
81};
82
83#endif /* G4MAG_SPIN_EQRHS */
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