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geant4/examples/extended/field/field06/src/F06DetectorConstruction.cc
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2016-06-10 11:51:14 +02:00

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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
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// * This code implementation is the result of the scientific and *
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//
// $Id: F06DetectorConstruction.cc 75572 2013-11-04 11:46:08Z gcosmo $
//
/// \file field/field06/src/F06DetectorConstruction.cc
/// \brief Implementation of the F06DetectorConstruction class
//
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#include "F06DetectorConstruction.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4GeometryManager.hh"
#include "G4PhysicalVolumeStore.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4SolidStore.hh"
#include "G4VisAttributes.hh"
#include "G4Colour.hh"
#include "G4UserLimits.hh"
#include "G4SystemOfUnits.hh"
#include "G4UniformGravityField.hh"
#include "G4FieldManager.hh"
#include "G4TransportationManager.hh"
#include "G4RepleteEofM.hh"
//#include "G4EqGravityField.hh"
#include "G4ClassicalRK4.hh"
#include "G4MagIntegratorStepper.hh"
#include "G4ChordFinder.hh"
#include "G4PropagatorInField.hh"
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F06DetectorConstruction::F06DetectorConstruction()
: fVacuum(0), fSolidWorld(0), fLogicWorld(0), fPhysiWorld(0)
{
// materials
DefineMaterials();
}
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F06DetectorConstruction::~F06DetectorConstruction()
{
if (fField) delete fField;
}
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void F06DetectorConstruction::DefineMaterials()
{
G4NistManager* nistMan = G4NistManager::Instance();
fVacuum = nistMan->FindOrBuildMaterial("G4_Galactic");
G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}
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G4VPhysicalVolume* F06DetectorConstruction::Construct()
{
//
// World
//
G4double expHall_x = 1.0*m;
G4double expHall_y = 1.0*m;
G4double expHall_z = 1.0*m;
fSolidWorld = new G4Box("World", //its name
expHall_x,expHall_y,expHall_z); //its size
fLogicWorld = new G4LogicalVolume(fSolidWorld, //its solid
fVacuum, //its material
"World"); //its name
fPhysiWorld = new G4PVPlacement(0, //no rotation
G4ThreeVector(), //at (0,0,0)
fLogicWorld, //its logical volume
"World", //its name
0, //its mother volume
false, //no boolean operation
0); //copy number
G4double maxStep = 1.0*mm;
G4double maxTime = 41.*s;
G4UserLimits* stepLimit = new G4UserLimits(maxStep,DBL_MAX,maxTime);
fLogicWorld->SetUserLimits(stepLimit);
//
// Visualization attributes
//
// fLogicWorld->SetVisAttributes (G4VisAttributes::Invisible);
//
//always return the physical World
//
return fPhysiWorld;
}
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G4ThreadLocal G4UniformGravityField* F06DetectorConstruction::fField = 0;
void F06DetectorConstruction::ConstructSDandField()
{
if (!fField) {
fField = new G4UniformGravityField();
G4RepleteEofM* equation = new G4RepleteEofM(fField);
// G4EqGravityField* equation = new G4EqGravityField(fField);
G4FieldManager* fieldManager
= G4TransportationManager::GetTransportationManager()->GetFieldManager();
fieldManager->SetDetectorField(fField);
// G4MagIntegratorStepper* stepper = new G4ClassicalRK4(equation,12);
G4MagIntegratorStepper* stepper = new G4ClassicalRK4(equation,8);
G4double minStep = 0.01*mm;
G4ChordFinder* chordFinder =
new G4ChordFinder((G4MagneticField*)fField,minStep,stepper);
// Set accuracy parameters
G4double deltaChord = 3.0*mm;
chordFinder->SetDeltaChord( deltaChord );
G4double deltaOneStep = 0.01*mm;
fieldManager->SetAccuraciesWithDeltaOneStep(deltaOneStep);
G4double deltaIntersection = 0.1*mm;
fieldManager->SetDeltaIntersection(deltaIntersection);
G4TransportationManager* transportManager =
G4TransportationManager::GetTransportationManager();
G4PropagatorInField* fieldPropagator =
transportManager->GetPropagatorInField();
G4double epsMin = 2.5e-7*mm;
G4double epsMax = 0.05*mm;
fieldPropagator->SetMinimumEpsilonStep(epsMin);
fieldPropagator->SetMaximumEpsilonStep(epsMax);
fieldManager->SetChordFinder(chordFinder);
}
}
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