include/Geant4/G4RKFieldIntegrator.hh

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0025 //
0026 #ifndef G4RKFieldIntegrator_h
0027 #define G4RKFieldIntegrator_h 1
0028
0029 #include "G4FieldPropagation.hh"
0030
0031 class G4RKFieldIntegrator : public G4FieldPropagation
0032 {
0033 public:
0034    G4RKFieldIntegrator() {}
0035    G4RKFieldIntegrator(const G4RKFieldIntegrator &):G4FieldPropagation() {}
0036
0037    ~G4RKFieldIntegrator() {}
0038
0039    //Operators
0040    const G4RKFieldIntegrator & operator=(const G4RKFieldIntegrator &) {return *this;}
0041
0042    G4bool operator==(const G4RKFieldIntegrator &) const {return 1;}
0043    G4bool operator!=(const G4RKFieldIntegrator &) const {return 1;}
0044
0045    // only theActive are propagated, nothing else
0046    // only theSpectators define the field, nothing else
0047    void Transport(G4KineticTrackVector &theActive, const G4KineticTrackVector &theSpectators, G4double theTimeStep);
0048    G4double GetExcitationEnergy(G4int nHitNucleons, const G4KineticTrackVector &theParticles);
0049
0050    // methods for calculating potentials for different types of particles
0051    void Init(G4int z, G4int a) {theZ = z;  theA = a;} // prepare potentials' functions
0052
0053    // aPosition is relative to the nucleus center
0054    G4double GetNeutronPotential(G4double radius);
0055    G4double GetNeutronPotential(G4ThreeVector &aPosition) {return GetNeutronPotential(aPosition.mag());}
0056
0057    G4double GetProtonPotential(G4double radius);
0058    G4double GetProtonPotential(G4ThreeVector &aPosition)  {return GetProtonPotential(aPosition.mag());}
0059
0060    G4double GetAntiprotonPotential(G4double radius);
0061    G4double GetAntiprotonPotential(G4ThreeVector &aPosition) {return GetAntiprotonPotential(aPosition.mag());};
0062
0063    G4double GetKaonPotential(G4double radius);
0064    G4double GetKaonPotential(G4ThreeVector &aPosition) {return GetKaonPotential(aPosition.mag());}
0065
0066    G4double GetPionPotential(G4double radius);
0067    G4double GetPionPotential(G4ThreeVector &aPosition) {return GetPionPotential(aPosition.mag());}
0068
0069 private:
0070    void Integrate(const G4KineticTrackVector & theActive, G4double theTimeStep);
0071    G4double CalculateTotalEnergy(const G4KineticTrackVector& Barions);
0072    G4double Erf(G4double X);
0073
0074   // parameters to calculate potentials
0075   G4int theA;
0076   G4int theZ;
0077
0078   // Vc(A, Z) = 1.44 * Z /(r0*(1 + std::pow(A, 1/3)))
0079   //          = colomb * Z / (1 + std::pow(A, 1/3))
0080   static const G4double coulomb;       // coulomb barier constant
0081   static const G4double a_kaon;        // kaon's potential constant
0082   static const G4double a_pion;        // pion's potential constant
0083   static const G4double a_antiproton;  // antiproton's potential constant
0084 };
0085
0086 #endif // G4RKFieldIntegrator_h
0087
0088