Gabriele Cosmo
259 lines
8.6 KiB
C++
259 lines
8.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id: F03FieldSetup.cc,v 1.5 2007/04/28 01:31:12 gum Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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//
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// Field Setup class implementation.
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//
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#include "F03FieldSetup.hh"
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#include "F03FieldMessenger.hh"
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#include "G4UniformMagField.hh"
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#include "G4MagneticField.hh"
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#include "G4FieldManager.hh"
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#include "G4TransportationManager.hh"
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#include "G4Mag_UsualEqRhs.hh"
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#include "G4MagIntegratorStepper.hh"
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#include "G4ChordFinder.hh"
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#include "G4ExplicitEuler.hh"
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#include "G4ImplicitEuler.hh"
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#include "G4SimpleRunge.hh"
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#include "G4SimpleHeum.hh"
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#include "G4ClassicalRK4.hh"
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#include "G4HelixExplicitEuler.hh"
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#include "G4HelixImplicitEuler.hh"
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#include "G4HelixSimpleRunge.hh"
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#include "G4CashKarpRKF45.hh"
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#include "G4RKG3_Stepper.hh"
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//////////////////////////////////////////////////////////////////////////
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//
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// Constructors:
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F03FieldSetup::F03FieldSetup()
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: fChordFinder(0), fLocalChordFinder(0), fStepper(0)
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{
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fMagneticField = new G4UniformMagField(
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G4ThreeVector(3.3*tesla,
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0.0, // 0.5*tesla,
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0.0 ));
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fLocalMagneticField = new G4UniformMagField(
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G4ThreeVector(3.3*tesla,
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0.0, // 0.5*tesla,
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0.0 ));
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fFieldMessenger = new F03FieldMessenger(this) ;
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fEquation = new G4Mag_UsualEqRhs(fMagneticField);
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fLocalEquation = new G4Mag_UsualEqRhs(fLocalMagneticField);
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fMinStep = 0.25*mm ; // minimal step of 1 mm is default
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fStepperType = 4 ; // ClassicalRK4 is default stepper
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fFieldManager = GetGlobalFieldManager();
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fLocalFieldManager = new G4FieldManager();
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UpdateField();
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}
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/////////////////////////////////////////////////////////////////////////////////
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F03FieldSetup::F03FieldSetup(G4ThreeVector fieldVector)
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{
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fMagneticField = new G4UniformMagField(fieldVector);
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GetGlobalFieldManager()->CreateChordFinder(fMagneticField);
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}
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////////////////////////////////////////////////////////////////////////////////
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F03FieldSetup::~F03FieldSetup()
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{
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if(fMagneticField) delete fMagneticField;
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if(fChordFinder) delete fChordFinder;
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if(fStepper) delete fStepper;
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// Update field
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//
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void F03FieldSetup::UpdateField()
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{
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SetStepper();
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G4cout<<"The minimal step is equal to "<<fMinStep/mm<<" mm"<<G4endl ;
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fFieldManager->SetDetectorField(fMagneticField );
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fLocalFieldManager->SetDetectorField(fLocalMagneticField );
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if(fChordFinder) delete fChordFinder;
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if(fLocalChordFinder) delete fLocalChordFinder;
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fChordFinder = new G4ChordFinder( fMagneticField, fMinStep,fStepper);
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fLocalChordFinder = new G4ChordFinder( fLocalMagneticField,
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fMinStep,fLocalStepper);
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fFieldManager->SetChordFinder( fChordFinder );
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fLocalFieldManager->SetChordFinder( fLocalChordFinder );
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// Set stepper according to the stepper type
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//
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void F03FieldSetup::SetStepper()
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{
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if(fStepper) delete fStepper;
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switch ( fStepperType )
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{
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case 0:
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fStepper = new G4ExplicitEuler( fEquation );
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fLocalStepper = new G4ExplicitEuler( fLocalEquation );
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G4cout<<"G4ExplicitEuler is calledS"<<G4endl;
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break;
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case 1:
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fStepper = new G4ImplicitEuler( fEquation );
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fLocalStepper = new G4ImplicitEuler( fLocalEquation );
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G4cout<<"G4ImplicitEuler is called"<<G4endl;
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break;
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case 2:
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fStepper = new G4SimpleRunge( fEquation );
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fLocalStepper = new G4SimpleRunge( fLocalEquation );
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G4cout<<"G4SimpleRunge is called"<<G4endl;
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break;
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case 3:
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fStepper = new G4SimpleHeum( fEquation );
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fLocalStepper = new G4SimpleHeum( fLocalEquation );
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G4cout<<"G4SimpleHeum is called"<<G4endl;
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break;
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case 4:
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fStepper = new G4ClassicalRK4( fEquation );
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fLocalStepper = new G4ClassicalRK4( fLocalEquation );
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G4cout<<"G4ClassicalRK4 (default) is called"<<G4endl;
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break;
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case 5:
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fStepper = new G4HelixExplicitEuler( fEquation );
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fLocalStepper = new G4HelixExplicitEuler( fLocalEquation );
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G4cout<<"G4HelixExplicitEuler is called"<<G4endl;
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break;
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case 6:
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fStepper = new G4HelixImplicitEuler( fEquation );
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fLocalStepper = new G4HelixImplicitEuler( fLocalEquation );
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G4cout<<"G4HelixImplicitEuler is called"<<G4endl;
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break;
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case 7:
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fStepper = new G4HelixSimpleRunge( fEquation );
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fLocalStepper = new G4HelixSimpleRunge( fLocalEquation );
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G4cout<<"G4HelixSimpleRunge is called"<<G4endl;
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break;
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case 8:
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fStepper = new G4CashKarpRKF45( fEquation );
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fLocalStepper = new G4CashKarpRKF45( fLocalEquation );
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G4cout<<"G4CashKarpRKF45 is called"<<G4endl;
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break;
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case 9:
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fStepper = new G4RKG3_Stepper( fEquation );
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fLocalStepper = new G4RKG3_Stepper( fLocalEquation );
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G4cout<<"G4RKG3_Stepper is called"<<G4endl;
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break;
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default: fStepper = 0;
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}
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}
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/////////////////////////////////////////////////////////////////////////////
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//
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// Set the value of the Global Field to fieldValue along Z
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//
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void F03FieldSetup::SetFieldValue(G4double fieldStrength)
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{
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G4ThreeVector fieldSetVec(0.0, 0.0, fieldStrength);
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this->SetFieldValue( fieldSetVec );
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// *************
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// Set the value of the Global Field
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//
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void F03FieldSetup::SetFieldValue(G4ThreeVector fieldVector)
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{
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if(fMagneticField) delete fMagneticField;
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if(fieldVector != G4ThreeVector(0.,0.,0.))
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{
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fMagneticField = new G4UniformMagField(fieldVector);
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}
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else
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{
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// If the new field's value is Zero, then
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// setting the pointer to zero ensures
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// that it is not used for propagation.
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fMagneticField = 0;
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}
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// Either
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// - UpdateField() to reset all (ChordFinder, Equation);
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// UpdateField();
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// or simply update the field manager & equation of motion
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// with pointer to new field
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GetGlobalFieldManager()->SetDetectorField(fMagneticField);
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fEquation->SetFieldObj( fMagneticField );
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}
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////////////////////////////////////////////////////////////////////////////////
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//
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// Utility method
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G4FieldManager* F03FieldSetup::GetGlobalFieldManager()
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{
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return G4TransportationManager::GetTransportationManager()
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->GetFieldManager();
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}
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// In place of G4UniformField::GetConstantFieldValue ...
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//
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G4ThreeVector F03FieldSetup::GetConstantFieldValue()
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{
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static G4double fieldValue[6], position[4];
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position[0] = position[1] = position[2] = position[3] = 0.0;
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fMagneticField->GetFieldValue( position, fieldValue);
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G4ThreeVector fieldVec(fieldValue[0], fieldValue[1], fieldValue[2]);
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return fieldVec;
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}
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