[807] | 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: F03FieldSetup.cc,v 1.5 2007/04/28 01:31:12 gum Exp $ |
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[1230] | 28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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[807] | 29 | // |
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| 30 | // |
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| 31 | // Field Setup class implementation. |
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| 32 | // |
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| 33 | |
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| 34 | #include "F03FieldSetup.hh" |
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| 35 | #include "F03FieldMessenger.hh" |
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| 36 | |
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| 37 | #include "G4UniformMagField.hh" |
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| 38 | #include "G4MagneticField.hh" |
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| 39 | #include "G4FieldManager.hh" |
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| 40 | #include "G4TransportationManager.hh" |
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| 41 | #include "G4Mag_UsualEqRhs.hh" |
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| 42 | #include "G4MagIntegratorStepper.hh" |
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| 43 | #include "G4ChordFinder.hh" |
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| 44 | |
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| 45 | #include "G4ExplicitEuler.hh" |
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| 46 | #include "G4ImplicitEuler.hh" |
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| 47 | #include "G4SimpleRunge.hh" |
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| 48 | #include "G4SimpleHeum.hh" |
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| 49 | #include "G4ClassicalRK4.hh" |
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| 50 | #include "G4HelixExplicitEuler.hh" |
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| 51 | #include "G4HelixImplicitEuler.hh" |
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| 52 | #include "G4HelixSimpleRunge.hh" |
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| 53 | #include "G4CashKarpRKF45.hh" |
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| 54 | #include "G4RKG3_Stepper.hh" |
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| 55 | |
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| 56 | ////////////////////////////////////////////////////////////////////////// |
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| 57 | // |
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| 58 | // Constructors: |
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| 59 | |
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| 60 | F03FieldSetup::F03FieldSetup() |
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| 61 | : fChordFinder(0), fLocalChordFinder(0), fStepper(0) |
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| 62 | { |
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| 63 | fMagneticField = new G4UniformMagField( |
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| 64 | G4ThreeVector(3.3*tesla, |
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| 65 | 0.0, // 0.5*tesla, |
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| 66 | 0.0 )); |
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| 67 | fLocalMagneticField = new G4UniformMagField( |
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| 68 | G4ThreeVector(3.3*tesla, |
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| 69 | 0.0, // 0.5*tesla, |
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| 70 | 0.0 )); |
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| 71 | |
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| 72 | fFieldMessenger = new F03FieldMessenger(this) ; |
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| 73 | |
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| 74 | fEquation = new G4Mag_UsualEqRhs(fMagneticField); |
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| 75 | fLocalEquation = new G4Mag_UsualEqRhs(fLocalMagneticField); |
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| 76 | |
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| 77 | fMinStep = 0.25*mm ; // minimal step of 1 mm is default |
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| 78 | fStepperType = 4 ; // ClassicalRK4 is default stepper |
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| 79 | |
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| 80 | fFieldManager = GetGlobalFieldManager(); |
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| 81 | fLocalFieldManager = new G4FieldManager(); |
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| 82 | |
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| 83 | UpdateField(); |
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| 84 | } |
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| 85 | |
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| 86 | ///////////////////////////////////////////////////////////////////////////////// |
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| 87 | |
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| 88 | F03FieldSetup::F03FieldSetup(G4ThreeVector fieldVector) |
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| 89 | { |
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| 90 | fMagneticField = new G4UniformMagField(fieldVector); |
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| 91 | GetGlobalFieldManager()->CreateChordFinder(fMagneticField); |
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| 92 | } |
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| 93 | |
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| 94 | //////////////////////////////////////////////////////////////////////////////// |
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| 95 | |
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| 96 | F03FieldSetup::~F03FieldSetup() |
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| 97 | { |
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| 98 | if(fMagneticField) delete fMagneticField; |
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| 99 | if(fChordFinder) delete fChordFinder; |
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| 100 | if(fStepper) delete fStepper; |
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| 101 | } |
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| 102 | |
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| 103 | ///////////////////////////////////////////////////////////////////////////// |
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| 104 | // |
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| 105 | // Update field |
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| 106 | // |
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| 107 | |
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| 108 | void F03FieldSetup::UpdateField() |
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| 109 | { |
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| 110 | SetStepper(); |
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| 111 | G4cout<<"The minimal step is equal to "<<fMinStep/mm<<" mm"<<G4endl ; |
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| 112 | |
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| 113 | fFieldManager->SetDetectorField(fMagneticField ); |
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| 114 | fLocalFieldManager->SetDetectorField(fLocalMagneticField ); |
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| 115 | |
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| 116 | if(fChordFinder) delete fChordFinder; |
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| 117 | if(fLocalChordFinder) delete fLocalChordFinder; |
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| 118 | |
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| 119 | fChordFinder = new G4ChordFinder( fMagneticField, fMinStep,fStepper); |
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| 120 | fLocalChordFinder = new G4ChordFinder( fLocalMagneticField, |
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| 121 | fMinStep,fLocalStepper); |
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| 122 | |
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| 123 | fFieldManager->SetChordFinder( fChordFinder ); |
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| 124 | fLocalFieldManager->SetChordFinder( fLocalChordFinder ); |
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| 125 | } |
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| 126 | |
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| 127 | ///////////////////////////////////////////////////////////////////////////// |
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| 128 | // |
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| 129 | // Set stepper according to the stepper type |
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| 130 | // |
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| 131 | |
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| 132 | void F03FieldSetup::SetStepper() |
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| 133 | { |
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| 134 | if(fStepper) delete fStepper; |
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| 135 | |
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| 136 | switch ( fStepperType ) |
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| 137 | { |
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| 138 | case 0: |
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| 139 | fStepper = new G4ExplicitEuler( fEquation ); |
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| 140 | fLocalStepper = new G4ExplicitEuler( fLocalEquation ); |
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| 141 | G4cout<<"G4ExplicitEuler is calledS"<<G4endl; |
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| 142 | break; |
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| 143 | case 1: |
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| 144 | fStepper = new G4ImplicitEuler( fEquation ); |
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| 145 | fLocalStepper = new G4ImplicitEuler( fLocalEquation ); |
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| 146 | G4cout<<"G4ImplicitEuler is called"<<G4endl; |
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| 147 | break; |
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| 148 | case 2: |
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| 149 | fStepper = new G4SimpleRunge( fEquation ); |
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| 150 | fLocalStepper = new G4SimpleRunge( fLocalEquation ); |
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| 151 | G4cout<<"G4SimpleRunge is called"<<G4endl; |
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| 152 | break; |
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| 153 | case 3: |
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| 154 | fStepper = new G4SimpleHeum( fEquation ); |
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| 155 | fLocalStepper = new G4SimpleHeum( fLocalEquation ); |
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| 156 | G4cout<<"G4SimpleHeum is called"<<G4endl; |
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| 157 | break; |
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| 158 | case 4: |
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| 159 | fStepper = new G4ClassicalRK4( fEquation ); |
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| 160 | fLocalStepper = new G4ClassicalRK4( fLocalEquation ); |
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| 161 | G4cout<<"G4ClassicalRK4 (default) is called"<<G4endl; |
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| 162 | break; |
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| 163 | case 5: |
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| 164 | fStepper = new G4HelixExplicitEuler( fEquation ); |
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| 165 | fLocalStepper = new G4HelixExplicitEuler( fLocalEquation ); |
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| 166 | G4cout<<"G4HelixExplicitEuler is called"<<G4endl; |
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| 167 | break; |
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| 168 | case 6: |
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| 169 | fStepper = new G4HelixImplicitEuler( fEquation ); |
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| 170 | fLocalStepper = new G4HelixImplicitEuler( fLocalEquation ); |
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| 171 | G4cout<<"G4HelixImplicitEuler is called"<<G4endl; |
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| 172 | break; |
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| 173 | case 7: |
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| 174 | fStepper = new G4HelixSimpleRunge( fEquation ); |
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| 175 | fLocalStepper = new G4HelixSimpleRunge( fLocalEquation ); |
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| 176 | G4cout<<"G4HelixSimpleRunge is called"<<G4endl; |
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| 177 | break; |
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| 178 | case 8: |
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| 179 | fStepper = new G4CashKarpRKF45( fEquation ); |
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| 180 | fLocalStepper = new G4CashKarpRKF45( fLocalEquation ); |
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| 181 | G4cout<<"G4CashKarpRKF45 is called"<<G4endl; |
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| 182 | break; |
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| 183 | case 9: |
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| 184 | fStepper = new G4RKG3_Stepper( fEquation ); |
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| 185 | fLocalStepper = new G4RKG3_Stepper( fLocalEquation ); |
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| 186 | G4cout<<"G4RKG3_Stepper is called"<<G4endl; |
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| 187 | break; |
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| 188 | default: fStepper = 0; |
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| 189 | } |
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| 190 | } |
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| 191 | |
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| 192 | ///////////////////////////////////////////////////////////////////////////// |
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| 193 | // |
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| 194 | // Set the value of the Global Field to fieldValue along Z |
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| 195 | // |
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| 196 | |
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| 197 | void F03FieldSetup::SetFieldValue(G4double fieldStrength) |
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| 198 | { |
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| 199 | G4ThreeVector fieldSetVec(0.0, 0.0, fieldStrength); |
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| 200 | this->SetFieldValue( fieldSetVec ); |
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| 201 | // ************* |
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| 202 | |
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| 203 | } |
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| 204 | |
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| 205 | /////////////////////////////////////////////////////////////////////////////// |
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| 206 | // |
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| 207 | // Set the value of the Global Field |
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| 208 | // |
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| 209 | |
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| 210 | void F03FieldSetup::SetFieldValue(G4ThreeVector fieldVector) |
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| 211 | { |
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| 212 | if(fMagneticField) delete fMagneticField; |
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| 213 | |
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| 214 | if(fieldVector != G4ThreeVector(0.,0.,0.)) |
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| 215 | { |
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| 216 | fMagneticField = new G4UniformMagField(fieldVector); |
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| 217 | } |
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| 218 | else |
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| 219 | { |
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| 220 | // If the new field's value is Zero, then |
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| 221 | // setting the pointer to zero ensures |
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| 222 | // that it is not used for propagation. |
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| 223 | fMagneticField = 0; |
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| 224 | } |
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| 225 | |
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| 226 | // Either |
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| 227 | // - UpdateField() to reset all (ChordFinder, Equation); |
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| 228 | // UpdateField(); |
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| 229 | // or simply update the field manager & equation of motion |
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| 230 | // with pointer to new field |
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| 231 | GetGlobalFieldManager()->SetDetectorField(fMagneticField); |
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| 232 | fEquation->SetFieldObj( fMagneticField ); |
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| 233 | |
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| 234 | } |
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| 235 | |
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| 236 | //////////////////////////////////////////////////////////////////////////////// |
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| 237 | // |
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| 238 | // Utility method |
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| 239 | |
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| 240 | G4FieldManager* F03FieldSetup::GetGlobalFieldManager() |
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| 241 | { |
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| 242 | return G4TransportationManager::GetTransportationManager() |
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| 243 | ->GetFieldManager(); |
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| 244 | } |
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| 245 | |
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| 246 | |
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| 247 | // In place of G4UniformField::GetConstantFieldValue ... |
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| 248 | // |
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| 249 | G4ThreeVector F03FieldSetup::GetConstantFieldValue() |
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| 250 | { |
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| 251 | static G4double fieldValue[6], position[4]; |
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| 252 | position[0] = position[1] = position[2] = position[3] = 0.0; |
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| 253 | |
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| 254 | fMagneticField->GetFieldValue( position, fieldValue); |
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| 255 | G4ThreeVector fieldVec(fieldValue[0], fieldValue[1], fieldValue[2]); |
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| 256 | |
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| 257 | return fieldVec; |
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| 258 | } |
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