F05DetectorConstruction.cc

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
/// \file field/field05/src/F05DetectorConstruction.cc
/// \brief Implementation of the F05DetectorConstruction class
//
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
#include "F05DetectorConstruction.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 "F05Field.hh"
 
#include "G4FieldManager.hh"
#include "G4TransportationManager.hh"
 
//#include "G4RepleteEofM.hh"
#include "G4EqEMFieldWithSpin.hh"
 
#include "G4ClassicalRK4.hh"
#include "G4MagIntegratorStepper.hh"
#include "G4ChordFinder.hh"
#include "G4PropagatorInField.hh"
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
F05DetectorConstruction::F05DetectorConstruction()
 : fVacuum(nullptr)
{
  // materials
  DefineMaterials();
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
F05DetectorConstruction::~F05DetectorConstruction()
{
  delete fField;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
void F05DetectorConstruction::DefineMaterials()
{
  G4NistManager* nistMan = G4NistManager::Instance();
 
  fVacuum = nistMan->FindOrBuildMaterial("G4_Galactic");
 
  G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
G4VPhysicalVolume* F05DetectorConstruction::Construct()
{
  //
  // World
  //
 
  G4double worldSizeXY = 20.0*m;
  G4double worldSizeZ  =  1.0*mm;
 
  auto solidWorld = new G4Box("World",                        //its name
                   worldSizeXY/2,worldSizeXY/2,worldSizeZ/2); //its size
 
  auto logicWorld = new G4LogicalVolume(solidWorld,     //its solid
                                    fVacuum,            //its material
                                    "World");           //its name
 
  auto physiWorld = new G4PVPlacement(nullptr,           //no rotation
                                  G4ThreeVector(),      //at (0,0,0)
                                  logicWorld,           //its logical volume
                                  "World",              //its name
                                  nullptr,              //its mother  volume
                                  false,                //no boolean operation
                                  0);                   //copy number
 
  G4UserLimits* stepLimit;
  stepLimit = new G4UserLimits(5*mm);
 
  logicWorld->SetUserLimits(stepLimit);
 
  //
  // Visualization attributes
  //
  // fLogicWorld->SetVisAttributes (G4VisAttributes::GetInvisible());
 
  //
  //always return the physical World
  //
  return physiWorld;
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 
G4ThreadLocal F05Field* F05DetectorConstruction::fField = nullptr;
 
void F05DetectorConstruction::ConstructSDandField()
 
{
  if (!fField) {
 
     fField = new F05Field();
 
//     G4RepleteEofM* equation = new G4RepleteEofM(fField);
     auto  equation = new G4EqEMFieldWithSpin(fField);
//     equation->SetBField();
//     equation->SetEField();
//     equation->SetSpin();
 
     G4FieldManager* fieldManager
      = G4TransportationManager::GetTransportationManager()->GetFieldManager();
     fieldManager->SetDetectorField(fField);
 
     G4MagIntegratorStepper* stepper = new G4ClassicalRK4(equation,12);
 
     G4double minStep           = 0.01*mm;
 
     auto  chordFinder =
                    new G4ChordFinder((G4MagneticField*)fField,minStep,stepper);
 
     // Set accuracy parameters
     G4double deltaChord        = 3.0*mm;
     chordFinder->SetDeltaChord( deltaChord );
 
     // Maximum allowed integration error in one integration sub-step
     G4double deltaOneStep      = 0.01*mm;
     fieldManager->SetAccuraciesWithDeltaOneStep(deltaOneStep);
 
     G4double deltaIntersection = 0.1*mm;
     fieldManager->SetDeltaIntersection(deltaIntersection);
 
     G4TransportationManager* transportManager =
                           G4TransportationManager::GetTransportationManager();
 
     G4PropagatorInField* fieldPropagator =
                                      transportManager->GetPropagatorInField();
 
     // Limits for relative accuracy of integration
     G4double epsMin            = 2.5e-7;
     G4double epsMax            = 0.001;
 
     fieldPropagator->SetMinimumEpsilonStep(epsMin);
     fieldPropagator->SetMaximumEpsilonStep(epsMax);
 
     fieldManager->SetChordFinder(chordFinder);
  }
}
 
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......