| [819] | 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: G4SynchrotronRadiation.hh,v 1.4 2006/06/29 19:55:43 gunter Exp $
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| [961] | 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $
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| [819] | 29 | //
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| 30 | // ------------------------------------------------------------
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| 31 | // GEANT 4 class header file
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| 32 | // CERN Geneva Switzerland
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| 33 | //
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| 34 | //
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| 35 | // History:
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| 36 | // 21-5-98 1 version , V. Grichine
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| 37 | // 28-05-01, V.Ivanchenko minor changes to provide ANSI -wall compilation
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| 38 | // 23-05-06, H. Burkhardt: Energy spectrum from function rather than table
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| 39 | //
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| 40 | //
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| 41 | // ------------------------------------------------------------
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| 42 |
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| 43 | #ifndef G4SynchrotronRadiation_h
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| 44 | #define G4SynchrotronRadiation_h 1
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| 45 |
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| 46 | #include "G4ios.hh"
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| 47 | #include "globals.hh"
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| 48 | #include "Randomize.hh"
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| 49 | #include "G4VDiscreteProcess.hh"
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| 50 | #include "G4TransportationManager.hh"
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| 51 | #include "G4FieldManager.hh"
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| 52 | #include "G4Field.hh"
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| 53 | #include "G4ThreeVector.hh"
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| 54 | #include "G4PropagatorInField.hh"
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| 55 |
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| 56 | #include "G4Track.hh"
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| 57 | #include "G4Step.hh"
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| 58 |
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| 59 | #include "G4Gamma.hh"
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| 60 | #include "G4Electron.hh"
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| 61 | #include "G4Positron.hh"
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| 62 |
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| 63 |
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| 64 | class G4SynchrotronRadiation : public G4VDiscreteProcess
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| 65 | {
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| 66 | public:
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| 67 |
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| 68 | G4SynchrotronRadiation(const G4String& pName = "SynRad",
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| 69 | G4ProcessType type = fElectromagnetic);
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| 70 |
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| 71 | virtual ~G4SynchrotronRadiation();
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| 72 |
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| 73 | G4double GetMeanFreePath( const G4Track& track,
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| 74 | G4double previousStepSize,
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| 75 | G4ForceCondition* condition );
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| 76 |
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| 77 | G4VParticleChange *PostStepDoIt( const G4Track& track,
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| 78 | const G4Step& Step );
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| 79 |
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| 80 | G4double GetPhotonEnergy( const G4Track& trackData,
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| 81 | const G4Step& stepData );
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| 82 |
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| 83 | G4double GetRandomEnergySR( G4double, G4double );
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| 84 |
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| 85 | G4double InvSynFracInt(G4double x);
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| 86 | G4double Chebyshev(G4double a,G4double b,const G4double c[],G4int m,G4double x);
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| 87 | G4bool IsApplicable(const G4ParticleDefinition&);
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| 88 | void BuildPhysicsTable(const G4ParticleDefinition& );
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| 89 | void PrintInfoDefinition();
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| 90 |
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| 91 | private:
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| 92 |
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| 93 | G4SynchrotronRadiation & operator=(const G4SynchrotronRadiation &right);
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| 94 | G4SynchrotronRadiation(const G4SynchrotronRadiation&);
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| 95 |
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| 96 | G4ParticleDefinition* theGamma;
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| 97 | const G4ParticleDefinition* theElectron;
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| 98 | const G4ParticleDefinition* thePositron;
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| 99 |
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| 100 | G4double fLambdaConst;
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| 101 | G4double fEnergyConst;
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| 102 |
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| 103 | G4PropagatorInField* fFieldPropagator;
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| 104 |
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| 105 | };
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| 106 |
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| 107 | ////////////////////////// INLINE METHODS /////////////////////////////
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| 108 | inline G4bool
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| 109 | G4SynchrotronRadiation::IsApplicable( const G4ParticleDefinition& particle )
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| 110 | {
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| 111 |
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| 112 | return ( ( &particle == (const G4ParticleDefinition *)theElectron ) ||
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| 113 | ( &particle == (const G4ParticleDefinition *)thePositron ) );
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| 114 |
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| 115 | // return ( particle.GetPDGCharge() != 0.0 );
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| 116 | }
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| 117 |
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| 118 | inline G4double G4SynchrotronRadiation::Chebyshev(G4double a,G4double b,const G4double c[],G4int m,G4double x)
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| 119 | {
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| 120 | G4double y;
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| 121 | G4double y2=2.0*(y=(2.0*x-a-b)/(b-a)); // Change of variable.
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| 122 | G4double d=0,dd=0;
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| 123 | for (G4int j=m-1;j>=1;j--) // Clenshaw's recurrence.
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| 124 | { G4double sv=d;
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| 125 | d=y2*d-dd+c[j];
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| 126 | dd=sv;
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| 127 | }
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| 128 | return y*d-dd+0.5*c[0];
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| 129 | }
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| 130 |
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| 131 | #endif // end of G4SynchrotronRadiation.hh
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| 132 |
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