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geant4/examples/extended/hadronic/Hadr03/src/DetectorConstruction.cc
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//
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//
/// \file hadronic/Hadr03/src/DetectorConstruction.cc
/// \brief Implementation of the DetectorConstruction class
//
// $Id: DetectorConstruction.cc 96284 2016-04-04 07:19:26Z gcosmo $
//
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#include "DetectorConstruction.hh"
#include "DetectorMessenger.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 "G4UnitsTable.hh"
#include "G4SystemOfUnits.hh"
#include "G4RunManager.hh"
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DetectorConstruction::DetectorConstruction()
:G4VUserDetectorConstruction(),
fPBox(0), fLBox(0), fMaterial(0), fDetectorMessenger(0)
{
fBoxSize = 10*m;
DefineMaterials();
SetMaterial("Molybdenum98");
fDetectorMessenger = new DetectorMessenger(this);
}
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DetectorConstruction::~DetectorConstruction()
{ delete fDetectorMessenger;}
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G4VPhysicalVolume* DetectorConstruction::Construct()
{
return ConstructVolumes();
}
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void DetectorConstruction::DefineMaterials()
{
// define a Material from isotopes
//
MaterialWithSingleIsotope("Molybdenum98", "Mo98", 10.28*g/cm3, 42, 98);
//NE213
G4Element* H = new G4Element("Hydrogen" ,"H" , 1., 1.01*g/mole);
G4Element* C = new G4Element("Hydrogen" ,"C" , 6., 12.00*g/mole);
G4Material* ne213 =
new G4Material("NE213", 0.874*g/cm3, 2);
ne213->AddElement(H, 9.2*perCent);
ne213->AddElement(C, 90.8*perCent);
// or use G4-NIST materials data base
//
G4NistManager* man = G4NistManager::Instance();
man->FindOrBuildMaterial("G4_B");
///G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}
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G4Material* DetectorConstruction::MaterialWithSingleIsotope( G4String name,
G4String symbol, G4double density, G4int Z, G4int A)
{
// define a material from an isotope
//
G4int ncomponents;
G4double abundance, massfraction;
G4Isotope* isotope = new G4Isotope(symbol, Z, A);
G4Element* element = new G4Element(name, symbol, ncomponents=1);
element->AddIsotope(isotope, abundance= 100.*perCent);
G4Material* material = new G4Material(name, density, ncomponents=1);
material->AddElement(element, massfraction=100.*perCent);
return material;
}
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G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
{
// Cleanup old geometry
G4GeometryManager::GetInstance()->OpenGeometry();
G4PhysicalVolumeStore::GetInstance()->Clean();
G4LogicalVolumeStore::GetInstance()->Clean();
G4SolidStore::GetInstance()->Clean();
G4Box*
sBox = new G4Box("Container", //its name
fBoxSize/2,fBoxSize/2,fBoxSize/2); //its dimensions
fLBox = new G4LogicalVolume(sBox, //its shape
fMaterial, //its material
fMaterial->GetName()); //its name
fPBox = new G4PVPlacement(0, //no rotation
G4ThreeVector(), //at (0,0,0)
fLBox, //its logical volume
fMaterial->GetName(), //its name
0, //its mother volume
false, //no boolean operation
0); //copy number
PrintParameters();
//always return the root volume
//
return fPBox;
}
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void DetectorConstruction::PrintParameters()
{
G4cout << "\n The Box is " << G4BestUnit(fBoxSize,"Length")
<< " of " << fMaterial->GetName()
<< "\n \n" << fMaterial << G4endl;
}
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void DetectorConstruction::SetMaterial(G4String materialChoice)
{
// search the material by its name
G4Material* pttoMaterial =
G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
if (pttoMaterial) {
if(fMaterial != pttoMaterial) {
fMaterial = pttoMaterial;
if(fLBox) { fLBox->SetMaterial(pttoMaterial); }
G4RunManager::GetRunManager()->PhysicsHasBeenModified();
}
} else {
G4cout << "\n--> warning from DetectorConstruction::SetMaterial : "
<< materialChoice << " not found" << G4endl;
}
}
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void DetectorConstruction::SetSize(G4double value)
{
fBoxSize = value;
G4RunManager::GetRunManager()->ReinitializeGeometry();
}
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