[831] | 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 | // |
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| 27 | // $Id: G4FieldTrack.hh,v 1.21 2006/11/13 18:24:35 gcosmo Exp $ |
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| 28 | // GEANT4 tag $Name: $ |
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| 29 | // |
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| 30 | // |
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| 31 | // class G4FieldTrack |
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| 32 | // |
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| 33 | // Class description: |
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| 34 | // |
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| 35 | // Data structure bringing together a magnetic track's state. |
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| 36 | // (position, momentum direction & modulus, energy, spin, ... ) |
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| 37 | // Uses/abilities: |
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| 38 | // - does not maintain any relationship between its data (eg energy/momentum). |
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| 39 | // - for use in Runge-Kutta solver (in passing it the values right now). |
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| 40 | |
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| 41 | // History |
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| 42 | // - First version: Oct 14, 1996 John Apostolakis |
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| 43 | // - Modified: Oct 24, 1996 JA: Added dist_on_curve, deleted constructor |
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| 44 | // Nov 5, 1998 JA: Added energy, momentum, TOF, spin & |
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| 45 | // several constructor, access, set methods |
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| 46 | // May 10, 2006 JA: Added charge, "default" constructor |
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| 47 | // ------------------------------------------------------------------- |
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| 48 | |
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| 49 | #ifndef G4FieldTrack_HH |
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| 50 | #define G4FieldTrack_HH |
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| 51 | |
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| 52 | #include "G4ThreeVector.hh" |
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| 53 | |
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| 54 | class G4FieldTrack |
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| 55 | { |
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| 56 | public: // with description |
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| 57 | |
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| 58 | G4FieldTrack( const G4ThreeVector& pPosition, |
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| 59 | G4double LaboratoryTimeOfFlight, |
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| 60 | const G4ThreeVector& pMomentumDirection, |
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| 61 | G4double kineticEnergy, |
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| 62 | G4double restMass_c2, |
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| 63 | G4double charge, |
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| 64 | const G4ThreeVector& pSpin, |
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| 65 | G4double magnetic_dipole_moment= 0.0, |
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| 66 | G4double curve_length= 0.0 |
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| 67 | ); |
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| 68 | G4FieldTrack( const G4FieldTrack& pFieldTrack ); |
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| 69 | G4FieldTrack( char ); // Almost default constructor |
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| 70 | |
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| 71 | ~G4FieldTrack(); |
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| 72 | // End of preferred Constructors / Destructor |
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| 73 | |
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| 74 | inline void |
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| 75 | UpdateState( const G4ThreeVector& pPosition, |
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| 76 | G4double LaboratoryTimeOfFlight, |
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| 77 | const G4ThreeVector& pMomentumDirection, |
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| 78 | G4double kineticEnergy); |
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| 79 | // Update four-vectors for space/time and momentum/energy |
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| 80 | // Also resets curve length. |
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| 81 | inline |
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| 82 | void UpdateFourMomentum( G4double kineticEnergy, |
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| 83 | const G4ThreeVector& momentumDirection ); |
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| 84 | // Update momentum (and direction), and kinetic energy |
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| 85 | |
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| 86 | void SetChargeAndMoments(G4double charge, |
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| 87 | G4double magnetic_dipole_moment= DBL_MAX, |
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| 88 | G4double electric_dipole_moment= DBL_MAX, |
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| 89 | G4double magnetic_charge=DBL_MAX ); |
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| 90 | // Sets all charges and moments |
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| 91 | |
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| 92 | G4FieldTrack( const G4ThreeVector& pPosition, |
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| 93 | const G4ThreeVector& pMomentumDirection, |
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| 94 | G4double curve_length, |
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| 95 | G4double kineticEnergy, |
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| 96 | const G4double restMass_c2, |
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| 97 | G4double velocity, |
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| 98 | G4double LaboratoryTimeOfFlight=0.0, |
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| 99 | G4double ProperTimeOfFlight=0.0, |
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| 100 | const G4ThreeVector* pSpin=0); |
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| 101 | // Older constructor |
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| 102 | // ---> Misses charge !!! |
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| 103 | |
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| 104 | inline G4FieldTrack& operator = ( const G4FieldTrack & rStVec ); |
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| 105 | // Assignment operator |
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| 106 | |
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| 107 | inline G4ThreeVector GetMomentum() const; |
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| 108 | inline G4ThreeVector GetPosition() const; |
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| 109 | inline const G4ThreeVector& GetMomentumDir() const; |
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| 110 | inline G4ThreeVector GetMomentumDirection() const; |
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| 111 | inline G4double GetCurveLength() const; |
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| 112 | // Distance along curve of point. |
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| 113 | |
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| 114 | inline G4ThreeVector GetSpin() const; |
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| 115 | inline G4double GetLabTimeOfFlight() const; |
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| 116 | inline G4double GetProperTimeOfFlight() const; |
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| 117 | inline G4double GetKineticEnergy() const; |
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| 118 | inline G4double GetCharge() const; |
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| 119 | // Accessors. |
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| 120 | |
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| 121 | inline void SetPosition(G4ThreeVector nPos); |
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| 122 | inline void SetMomentum(G4ThreeVector nMomDir); |
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| 123 | // Does change mom-dir too. |
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| 124 | |
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| 125 | inline void SetMomentumDir(G4ThreeVector nMomDir); |
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| 126 | // Does NOT change Momentum or Velocity Vector. |
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| 127 | |
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| 128 | inline void SetCurveLength(G4double nCurve_s); |
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| 129 | // Distance along curve. |
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| 130 | inline void SetKineticEnergy(G4double nEnergy); |
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| 131 | // Does not modify momentum. |
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| 132 | |
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| 133 | inline void SetSpin(G4ThreeVector nSpin); |
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| 134 | inline void SetLabTimeOfFlight(G4double nTOF); |
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| 135 | inline void SetProperTimeOfFlight(G4double nTOF); |
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| 136 | // Modifiers |
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| 137 | |
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| 138 | public: // without description |
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| 139 | |
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| 140 | inline G4FieldTrack& SetCurvePnt(const G4ThreeVector& pPosition, |
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| 141 | const G4ThreeVector& pMomentum, |
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| 142 | G4double s_curve ); |
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| 143 | inline void InitialiseSpin( const G4ThreeVector& Spin ); |
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| 144 | // Used to update / initialise the state |
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| 145 | |
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| 146 | enum { ncompSVEC = 12 }; |
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| 147 | // Needed and should be used only for RK integration driver |
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| 148 | |
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| 149 | inline void DumpToArray(G4double valArr[ncompSVEC]) const; |
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| 150 | inline void LoadFromArray(const G4double valArr[ncompSVEC], |
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| 151 | G4int noVarsIntegrated); |
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| 152 | friend std::ostream& |
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| 153 | operator<<( std::ostream& os, const G4FieldTrack& SixVec); |
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| 154 | |
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| 155 | private: |
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| 156 | |
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| 157 | G4double SixVector[6]; |
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| 158 | G4double fDistanceAlongCurve; // distance along curve of point |
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| 159 | G4double fKineticEnergy; |
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| 160 | G4double fRestMass_c2; |
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| 161 | G4double fLabTimeOfFlight; |
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| 162 | G4double fProperTimeOfFlight; |
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| 163 | G4ThreeVector fSpin; |
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| 164 | G4ThreeVector fMomentumDir; |
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| 165 | |
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| 166 | private: // Implementation detail -- daughter class |
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| 167 | |
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| 168 | class G4ChargeState // Charge & moments |
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| 169 | { |
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| 170 | public: // without description |
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| 171 | |
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| 172 | inline G4ChargeState(G4double charge, |
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| 173 | G4double magnetic_dipole_moment= 0.0, |
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| 174 | G4double electric_dipole_moment= 0.0, |
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| 175 | G4double magnetic_charge= 0.0); |
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| 176 | inline G4ChargeState( const G4ChargeState& right ); |
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| 177 | |
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| 178 | inline void SetCharge(G4double charge){ fCharge= charge; } |
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| 179 | |
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| 180 | // Revise the charge (in units of the positron charge) |
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| 181 | // do not change moments |
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| 182 | |
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| 183 | void SetChargeAndMoments(G4double charge, |
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| 184 | G4double magnetic_dipole_moment= DBL_MAX, |
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| 185 | G4double electric_dipole_moment= DBL_MAX, |
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| 186 | G4double magnetic_charge=DBL_MAX ); |
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| 187 | // Revise the charge and all moments |
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| 188 | |
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| 189 | G4double GetCharge() const { return fCharge; } |
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| 190 | G4double GetMagneticDipoleMoment() const { return fMagn_dipole; } |
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| 191 | G4double ElectricDipoleMoment() const { return fElec_dipole; } |
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| 192 | G4double MagneticCharge() const { return fMagneticCharge; } |
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| 193 | |
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| 194 | private: |
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| 195 | |
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| 196 | G4double fCharge; |
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| 197 | G4double fMagn_dipole; |
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| 198 | G4double fElec_dipole; |
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| 199 | G4double fMagneticCharge; // for magnetic monopole |
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| 200 | }; |
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| 201 | |
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| 202 | G4ChargeState fChargeState; |
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| 203 | |
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| 204 | public: // Access |
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| 205 | |
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| 206 | const G4ChargeState* GetChargeState() const { return &fChargeState; } |
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| 207 | }; |
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| 208 | |
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| 209 | #include "G4FieldTrack.icc" |
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| 210 | |
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| 211 | #endif /* End of ifndef G4FieldTrack_HH */ |
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