Gabriele Cosmo
227 lines
7.0 KiB
C++
227 lines
7.0 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: F01ElectroMagneticField.cc,v 1.8 2001/10/15 17:20:37 gcosmo Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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//
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// User Field class implementation.
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//
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#include "F01ElectroMagneticField.hh"
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#include "F01FieldMessenger.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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F01ElectroMagneticField::F01ElectroMagneticField()
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: fChordFinder(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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fFieldMessenger = new F01FieldMessenger(this) ;
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fEquation = new G4Mag_UsualEqRhs(fMagneticField);
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fMinStep = 1.0*mm ; // minimal step of 1 mm is default
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fStepperType = 4 ; // ClassicalRK4 is default stepper
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fFieldManager = G4TransportationManager::GetTransportationManager()
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->GetFieldManager();
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UpdateField();
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}
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/////////////////////////////////////////////////////////////////////////////////
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F01ElectroMagneticField::F01ElectroMagneticField(G4ThreeVector fieldVector)
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{
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fMagneticField = new G4UniformMagField(fieldVector);
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GetGlobalFieldManager()->CreateChordFinder(this);
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}
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////////////////////////////////////////////////////////////////////////////////
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F01ElectroMagneticField::~F01ElectroMagneticField()
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{
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// GetGlobalFieldManager()->SetDetectorField(0);
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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 F01ElectroMagneticField::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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if(fChordFinder) delete fChordFinder;
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fChordFinder = new G4ChordFinder( fMagneticField, fMinStep,fStepper);
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fFieldManager->SetChordFinder( fChordFinder );
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return;
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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 F01ElectroMagneticField::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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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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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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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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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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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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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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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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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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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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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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return;
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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 F01ElectroMagneticField::SetFieldValue(G4double fieldValue)
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{
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if(fMagneticField) delete fMagneticField;
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fMagneticField = new G4UniformMagField(G4ThreeVector(0,0,fieldValue));
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// UpdateField();
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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 F01ElectroMagneticField::SetFieldValue(G4ThreeVector fieldVector)
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{
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// Find the Field Manager for the global field
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G4FieldManager* fieldMgr= GetGlobalFieldManager();
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if(fieldVector != G4ThreeVector(0.,0.,0.))
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{
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if(fMagneticField) delete fMagneticField;
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fMagneticField = new G4UniformMagField(fieldVector);
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// UpdateField();
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fieldMgr->SetDetectorField(this);
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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 it is best to
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// insure that it is not used for propagation.
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G4MagneticField* fMagneticField = 0;
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fieldMgr->SetDetectorField(fMagneticField);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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//
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// Utility method
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G4FieldManager* F01ElectroMagneticField::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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