| 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | #ifndef G4RKFieldIntegrator_h |
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| 27 | #define G4RKFieldIntegrator_h 1 |
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| 28 | |
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| 29 | #include "G4FieldPropagation.hh" |
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| 30 | |
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| 31 | class G4RKFieldIntegrator : public G4FieldPropagation |
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| 32 | { |
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| 33 | public: |
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| 34 | G4RKFieldIntegrator() {} |
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| 35 | G4RKFieldIntegrator(const G4RKFieldIntegrator &):G4FieldPropagation() {} |
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| 36 | |
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| 37 | ~G4RKFieldIntegrator() {} |
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| 38 | |
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| 39 | //Operators |
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| 40 | const G4RKFieldIntegrator & operator=(const G4RKFieldIntegrator &) {return *this;} |
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| 41 | |
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| 42 | int operator==(const G4RKFieldIntegrator &) const {return 1;} |
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| 43 | int operator!=(const G4RKFieldIntegrator &) const {return 1;} |
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| 44 | |
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| 45 | // only theActive are propagated, nothing else |
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| 46 | // only theSpectators define the field, nothing else |
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| 47 | void Transport(G4KineticTrackVector &theActive, const G4KineticTrackVector &theSpectators, G4double theTimeStep); |
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| 48 | G4double GetExcitationEnergy(G4int nHitNucleons, const G4KineticTrackVector &theParticles); |
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| 49 | |
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| 50 | // methods for calculating potentials for different types of particles |
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| 51 | void Init(G4int z, G4int a) {theZ = z; theA = a;} // prepare potentials' functions |
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| 52 | |
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| 53 | // aPosition is relative to the nucleus center |
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| 54 | G4double GetNeutronPotential(G4double radius); |
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| 55 | G4double GetNeutronPotential(G4ThreeVector &aPosition) {return GetNeutronPotential(aPosition.mag());} |
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| 56 | |
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| 57 | G4double GetProtonPotential(G4double radius); |
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| 58 | G4double GetProtonPotential(G4ThreeVector &aPosition) {return GetProtonPotential(aPosition.mag());} |
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| 59 | |
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| 60 | G4double GetAntiprotonPotential(G4double radius); |
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| 61 | G4double GetAntiprotonPotential(G4ThreeVector &aPosition) {return GetAntiprotonPotential(aPosition.mag());}; |
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| 62 | |
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| 63 | G4double GetKaonPotential(G4double radius); |
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| 64 | G4double GetKaonPotential(G4ThreeVector &aPosition) {return GetKaonPotential(aPosition.mag());} |
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| 65 | |
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| 66 | G4double GetPionPotential(G4double radius); |
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| 67 | G4double GetPionPotential(G4ThreeVector &aPosition) {return GetPionPotential(aPosition.mag());} |
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| 68 | |
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| 69 | private: |
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| 70 | void Integrate(const G4KineticTrackVector & theActive, G4double theTimeStep); |
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| 71 | G4double CalculateTotalEnergy(const G4KineticTrackVector& Barions); |
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| 72 | G4double Erf(G4double X); |
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| 73 | |
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| 74 | // parameters to calculate potentials |
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| 75 | G4int theA; |
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| 76 | G4int theZ; |
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| 77 | |
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| 78 | // Vc(A, Z) = 1.44 * Z /(r0*(1 + std::pow(A, 1/3))) |
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| 79 | // = colomb * Z / (1 + std::pow(A, 1/3)) |
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| 80 | static const G4double coulomb; // coulomb barier constant |
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| 81 | static const G4double a_kaon; // kaon's potential constant |
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| 82 | static const G4double a_pion; // pion's potential constant |
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| 83 | static const G4double a_antiproton; // antiproton's potential constant |
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| 84 | }; |
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| 85 | |
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| 86 | #endif // G4RKFieldIntegrator_h |
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| 87 | |
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| 88 | |
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