Gabriele Cosmo
230 lines
8.3 KiB
C++
230 lines
8.3 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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/// \file DetectorConstruction.cc
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/// \brief Implementation of the DetectorConstruction class
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#include "DetectorConstruction.hh"
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#include "DetectorMessenger.hh"
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#include "G4Box.hh"
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#include "G4GeometryManager.hh"
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#include "G4LogicalVolume.hh"
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#include "G4LogicalVolumeStore.hh"
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#include "G4Material.hh"
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#include "G4NistManager.hh"
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#include "G4PVPlacement.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4PhysicalVolumeStore.hh"
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#include "G4RunManager.hh"
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#include "G4SolidStore.hh"
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#include "G4Sphere.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4UnitsTable.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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DetectorConstruction::DetectorConstruction()
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{
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fRadius = 30 * cm;
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fWorldSize = 1.1 * fRadius;
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DefineMaterials();
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SetMaterial("Water_ts");
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fDetectorMessenger = new DetectorMessenger(this);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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DetectorConstruction::~DetectorConstruction()
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{
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delete fDetectorMessenger;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4VPhysicalVolume* DetectorConstruction::Construct()
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{
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return ConstructVolumes();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::DefineMaterials()
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{
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// specific element name for thermal neutronHP
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// (see G4ParticleHPThermalScatteringNames.cc)
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G4int ncomponents, natoms;
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// pressurized water
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G4Element* H = new G4Element("TS_H_of_Water", "H", 1., 1.0079 * g / mole);
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G4Element* O = new G4Element("Oxygen", "O", 8., 16.00 * g / mole);
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G4Material* H2O = new G4Material("Water_ts", 1.000 * g / cm3, ncomponents = 2, kStateLiquid,
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593 * kelvin, 150 * bar);
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H2O->AddElement(H, natoms = 2);
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H2O->AddElement(O, natoms = 1);
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H2O->GetIonisation()->SetMeanExcitationEnergy(78.0 * eV);
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// heavy water
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G4Isotope* H2 = new G4Isotope("H2", 1, 2);
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G4Element* D = new G4Element("TS_D_of_Heavy_Water", "D", 1);
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D->AddIsotope(H2, 100 * perCent);
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G4Material* D2O = new G4Material("HeavyWater", 1.11 * g / cm3, ncomponents = 2, kStateLiquid,
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293.15 * kelvin, 1 * atmosphere);
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D2O->AddElement(D, natoms = 2);
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D2O->AddElement(O, natoms = 1);
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// graphite
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G4Isotope* C12 = new G4Isotope("C12", 6, 12);
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G4Element* C = new G4Element("TS_C_of_Graphite", "C", ncomponents = 1);
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C->AddIsotope(C12, 100. * perCent);
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G4Material* graphite = new G4Material("graphite", 2.27 * g / cm3, ncomponents = 1, kStateSolid,
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293 * kelvin, 1 * atmosphere);
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graphite->AddElement(C, natoms = 1);
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// NE213
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G4Material* ne213 = new G4Material("NE213", 0.874 * g / cm3, ncomponents = 2);
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ne213->AddElement(H, 9.2 * perCent);
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ne213->AddElement(C, 90.8 * perCent);
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// example of vacuum
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fWorldMat = new G4Material("Galactic", 1, 1.01 * g / mole, universe_mean_density, kStateGas,
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2.73 * kelvin, 3.e-18 * pascal);
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/// G4cout << *(G4Material::GetMaterialTable()) << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4Material* DetectorConstruction::MaterialWithSingleIsotope(G4String name, G4String symbol,
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G4double density, G4int Z, G4int A)
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{
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// define a material from an isotope
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//
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G4int ncomponents;
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G4double abundance, massfraction;
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G4Isotope* isotope = new G4Isotope(symbol, Z, A);
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G4Element* element = new G4Element(name, symbol, ncomponents = 1);
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element->AddIsotope(isotope, abundance = 100. * perCent);
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G4Material* material = new G4Material(name, density, ncomponents = 1);
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material->AddElement(element, massfraction = 100. * perCent);
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return material;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4VPhysicalVolume* DetectorConstruction::ConstructVolumes()
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{
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// Cleanup old geometry
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G4GeometryManager::GetInstance()->OpenGeometry();
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G4PhysicalVolumeStore::GetInstance()->Clean();
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G4LogicalVolumeStore::GetInstance()->Clean();
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G4SolidStore::GetInstance()->Clean();
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// World
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//
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G4Box* sWorld = new G4Box("World", // name
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fWorldSize, fWorldSize, fWorldSize); // dimensions
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G4LogicalVolume* lWorld = new G4LogicalVolume(sWorld, // shape
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fWorldMat, // material
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"World"); // name
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fPWorld = new G4PVPlacement(0, // no rotation
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G4ThreeVector(), // at (0,0,0)
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lWorld, // logical volume
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"World", // name
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0, // mother volume
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false, // no boolean operation
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0); // copy number
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// Absorber
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//
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G4Sphere* sAbsor = new G4Sphere("Absorber", // name
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0., fRadius, 0., twopi, 0., pi); // dimensions
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fLAbsor = new G4LogicalVolume(sAbsor, // shape
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fMaterial, // material
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fMaterial->GetName()); // name
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new G4PVPlacement(0, // no rotation
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G4ThreeVector(), // at (0,0,0)
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fLAbsor, // logical volume
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fMaterial->GetName(), // name
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lWorld, // mother volume
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false, // no boolean operation
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0); // copy number
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PrintParameters();
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// always return the root volume
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//
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return fPWorld;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::PrintParameters()
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{
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G4cout << "\n The Absorber is " << G4BestUnit(fRadius, "Length") << " of " << fMaterial->GetName()
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<< "\n \n"
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<< fMaterial << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetMaterial(G4String materialChoice)
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{
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// search the material by its name
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G4Material* pttoMaterial = G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
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if (pttoMaterial) {
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fMaterial = pttoMaterial;
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if (fLAbsor) {
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fLAbsor->SetMaterial(fMaterial);
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}
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G4RunManager::GetRunManager()->PhysicsHasBeenModified();
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}
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else {
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G4cout << "\n--> warning from DetectorConstruction::SetMaterial : " << materialChoice
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<< " not found" << G4endl;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetRadius(G4double value)
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{
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fRadius = value;
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fWorldSize = 1.1 * fRadius;
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G4RunManager::GetRunManager()->ReinitializeGeometry();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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