| [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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| 28 | // GEANT4 tag $Name: $
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| 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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