[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: F02ElectricFieldSetup.cc,v 1.2.2.1 2008/05/05 09:23:52 gcosmo Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-01-patch-02 $ |
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| 29 | // |
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| 30 | // |
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| 31 | // User Field class implementation. |
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| 32 | // |
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| 33 | |
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| 34 | #include "F02ElectricFieldSetup.hh" |
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| 35 | #include "F02FieldMessenger.hh" |
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| 36 | |
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| 37 | #include "G4UniformElectricField.hh" |
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| 38 | #include "G4UniformMagField.hh" |
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| 39 | #include "G4MagneticField.hh" |
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| 40 | #include "G4FieldManager.hh" |
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| 41 | #include "G4TransportationManager.hh" |
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| 42 | #include "G4EquationOfMotion.hh" |
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| 43 | #include "G4EqMagElectricField.hh" |
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| 44 | #include "G4Mag_UsualEqRhs.hh" |
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| 45 | #include "G4MagIntegratorStepper.hh" |
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| 46 | #include "G4MagIntegratorDriver.hh" |
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| 47 | #include "G4ChordFinder.hh" |
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| 48 | |
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| 49 | #include "G4ExplicitEuler.hh" |
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| 50 | #include "G4ImplicitEuler.hh" |
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| 51 | #include "G4SimpleRunge.hh" |
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| 52 | #include "G4SimpleHeum.hh" |
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| 53 | #include "G4ClassicalRK4.hh" |
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| 54 | #include "G4HelixExplicitEuler.hh" |
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| 55 | #include "G4HelixImplicitEuler.hh" |
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| 56 | #include "G4HelixSimpleRunge.hh" |
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| 57 | #include "G4CashKarpRKF45.hh" |
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| 58 | #include "G4RKG3_Stepper.hh" |
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| 59 | |
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| 60 | ////////////////////////////////////////////////////////////////////////// |
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| 61 | // |
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| 62 | // Constructors: |
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| 63 | |
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| 64 | F02ElectricFieldSetup::F02ElectricFieldSetup() |
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| 65 | : fChordFinder(0), fStepper(0), fIntgrDriver(0) |
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| 66 | { |
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| 67 | fEMfield = new G4UniformElectricField( |
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| 68 | G4ThreeVector(0.0,100000.0*kilovolt/cm,0.0)); |
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| 69 | fFieldMessenger = new F02FieldMessenger(this) ; |
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| 70 | fEquation = new G4EqMagElectricField(fEMfield); |
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| 71 | fMinStep = 0.010*mm ; // minimal step of 10 microns |
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| 72 | fStepperType = 4 ; // ClassicalRK4 -- the default stepper |
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| 73 | |
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| 74 | fFieldManager = GetGlobalFieldManager(); |
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| 75 | UpdateField(); |
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| 76 | |
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| 77 | } |
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| 78 | |
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| 79 | ///////////////////////////////////////////////////////////////////////////////// |
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| 80 | |
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| 81 | F02ElectricFieldSetup::F02ElectricFieldSetup(G4ThreeVector pFV) |
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| 82 | : fChordFinder(0), |
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| 83 | fStepper(0), |
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| 84 | fIntgrDriver(0) |
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| 85 | { |
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| 86 | fEMfield = new G4UniformElectricField(pFV); |
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| 87 | // GetGlobalFieldManager()->CreateChordFinder(this); |
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| 88 | |
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| 89 | fFieldMessenger = new F02FieldMessenger(this) ; |
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| 90 | fEquation = new G4EqMagElectricField(fEMfield); |
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| 91 | fMinStep = 0.010*mm ; // minimal step of 10 microns |
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| 92 | fStepperType = 4 ; // ClassicalRK4 -- the default stepper |
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| 93 | |
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| 94 | fFieldManager = GetGlobalFieldManager(); |
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| 95 | UpdateField(); |
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| 96 | } |
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| 97 | |
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| 98 | //////////////////////////////////////////////////////////////////////////////// |
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| 99 | |
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| 100 | F02ElectricFieldSetup::~F02ElectricFieldSetup() |
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| 101 | { |
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| 102 | if(fChordFinder) delete fChordFinder; |
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| 103 | if(fStepper) delete fStepper; |
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| 104 | if(fEquation) delete fEquation; |
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| 105 | if(fEMfield) delete fEMfield; |
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| 106 | } |
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| 107 | |
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| 108 | ///////////////////////////////////////////////////////////////////////////// |
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| 109 | // |
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| 110 | // Register this field to 'global' Field Manager and |
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| 111 | // Create Stepper and Chord Finder with predefined type, minstep (resp.) |
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| 112 | // |
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| 113 | |
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| 114 | void F02ElectricFieldSetup::UpdateField() |
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| 115 | { |
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| 116 | SetStepper(); |
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| 117 | |
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| 118 | G4cout<<"The minimal step is equal to "<<fMinStep/mm<<" mm"<<G4endl ; |
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| 119 | |
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| 120 | fFieldManager->SetDetectorField(fEMfield ); |
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| 121 | |
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| 122 | if(fChordFinder) delete fChordFinder; |
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| 123 | // fChordFinder = new G4ChordFinder( fEMfield, fMinStep, fStepper); |
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| 124 | |
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| 125 | fIntgrDriver = new G4MagInt_Driver(fMinStep, |
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| 126 | fStepper, |
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| 127 | fStepper->GetNumberOfVariables() ); |
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| 128 | |
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| 129 | fChordFinder = new G4ChordFinder(fIntgrDriver); |
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| 130 | |
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| 131 | fFieldManager->SetChordFinder( fChordFinder ); |
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| 132 | } |
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| 133 | |
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| 134 | ///////////////////////////////////////////////////////////////////////////// |
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| 135 | // |
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| 136 | // Set stepper according to the stepper type |
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| 137 | // |
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| 138 | |
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| 139 | void F02ElectricFieldSetup::SetStepper() |
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| 140 | { |
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| 141 | G4int nvar = 8; |
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| 142 | |
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| 143 | if(fStepper) delete fStepper; |
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| 144 | |
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| 145 | switch ( fStepperType ) |
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| 146 | { |
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| 147 | case 0: |
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| 148 | fStepper = new G4ExplicitEuler( fEquation, nvar ); |
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| 149 | G4cout<<"G4ExplicitEuler is calledS"<<G4endl; |
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| 150 | break; |
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| 151 | case 1: |
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| 152 | fStepper = new G4ImplicitEuler( fEquation, nvar ); |
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| 153 | G4cout<<"G4ImplicitEuler is called"<<G4endl; |
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| 154 | break; |
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| 155 | case 2: |
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| 156 | fStepper = new G4SimpleRunge( fEquation, nvar ); |
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| 157 | G4cout<<"G4SimpleRunge is called"<<G4endl; |
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| 158 | break; |
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| 159 | case 3: |
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| 160 | fStepper = new G4SimpleHeum( fEquation, nvar ); |
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| 161 | G4cout<<"G4SimpleHeum is called"<<G4endl; |
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| 162 | break; |
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| 163 | case 4: |
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| 164 | fStepper = new G4ClassicalRK4( fEquation, nvar ); |
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| 165 | G4cout<<"G4ClassicalRK4 (default) is called"<<G4endl; |
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| 166 | break; |
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| 167 | case 5: |
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| 168 | fStepper = new G4CashKarpRKF45( fEquation, nvar ); |
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| 169 | G4cout<<"G4CashKarpRKF45 is called"<<G4endl; |
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| 170 | break; |
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| 171 | case 6: |
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| 172 | fStepper = 0; // new G4RKG3_Stepper( fEquation, nvar ); |
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| 173 | G4cout<<"G4RKG3_Stepper is not currently working for Electric Field"<<G4endl; |
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| 174 | break; |
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| 175 | case 7: |
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| 176 | fStepper = 0; // new G4HelixExplicitEuler( fEquation ); |
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| 177 | G4cout<<"G4HelixExplicitEuler is not valid for Electric Field"<<G4endl; |
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| 178 | break; |
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| 179 | case 8: |
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| 180 | fStepper = 0; // new G4HelixImplicitEuler( fEquation ); |
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| 181 | G4cout<<"G4HelixImplicitEuler is not valid for Electric Field"<<G4endl; |
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| 182 | break; |
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| 183 | case 9: |
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| 184 | fStepper = 0; // new G4HelixSimpleRunge( fEquation ); |
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| 185 | G4cout<<"G4HelixSimpleRunge is not valid for Electric Field"<<G4endl; |
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| 186 | break; |
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| 187 | default: fStepper = 0; |
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| 188 | } |
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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 | // Set the value of the Global Field to fieldValue along Z |
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| 194 | // |
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| 195 | |
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| 196 | void F02ElectricFieldSetup::SetFieldValue(G4double fieldValue) |
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| 197 | { |
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| 198 | G4ThreeVector fieldVector( 0.0, 0.0, fieldValue*volt/mm ); |
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| 199 | |
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| 200 | SetFieldValue( fieldVector ); |
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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 | // Set the value of the Global Field value to fieldVector |
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| 206 | // |
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| 207 | |
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| 208 | void F02ElectricFieldSetup::SetFieldValue(G4ThreeVector fieldVector) |
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| 209 | { |
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| 210 | // Find the Field Manager for the global field |
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| 211 | G4FieldManager* fieldMgr= GetGlobalFieldManager(); |
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| 212 | |
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| 213 | if(fieldVector != G4ThreeVector(0.,0.,0.)) |
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| 214 | { |
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| 215 | if(fEMfield) delete fEMfield; |
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| 216 | fEMfield = new G4UniformElectricField(fieldVector); |
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| 217 | |
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| 218 | fEquation->SetFieldObj(fEMfield); // must now point to the new field |
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| 219 | |
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| 220 | // UpdateField(); |
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| 221 | |
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| 222 | fieldMgr->SetDetectorField(fEMfield); |
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| 223 | } |
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| 224 | else |
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| 225 | { |
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| 226 | // If the new field's value is Zero, then it is best to |
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| 227 | // insure that it is not used for propagation. |
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| 228 | if(fEMfield) delete fEMfield; |
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| 229 | fEMfield = 0; |
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| 230 | fEquation->SetFieldObj(fEMfield); // As a double check ... |
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| 231 | |
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| 232 | G4MagneticField* fEMfield = 0; |
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| 233 | fieldMgr->SetDetectorField(fEMfield); |
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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 | // |
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| 239 | // Utility method |
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| 240 | |
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| 241 | G4FieldManager* F02ElectricFieldSetup::GetGlobalFieldManager() |
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| 242 | { |
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| 243 | return G4TransportationManager::GetTransportationManager() |
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| 244 | ->GetFieldManager(); |
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| 245 | } |
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