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geant4/examples/basic/B4/B4a/src/DetectorConstruction.cc
T
Gabriele Cosmo 9f34590941 Import Geant4 11.1.0 source tree
2022-12-09 14:43:28 +01:00

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//
// ********************************************************************
// * 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 B4/B4a/src/DetectorConstruction.cc
/// \brief Implementation of the B4::DetectorConstruction class
#include "DetectorConstruction.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVReplica.hh"
#include "G4GlobalMagFieldMessenger.hh"
#include "G4AutoDelete.hh"
#include "G4GeometryManager.hh"
#include "G4PhysicalVolumeStore.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4SolidStore.hh"
#include "G4VisAttributes.hh"
#include "G4Colour.hh"
#include "G4PhysicalConstants.hh"
#include "G4SystemOfUnits.hh"
namespace B4
{
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4ThreadLocal
G4GlobalMagFieldMessenger* DetectorConstruction::fMagFieldMessenger = nullptr;
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4VPhysicalVolume* DetectorConstruction::Construct()
{
// Define materials
DefineMaterials();
// Define volumes
return DefineVolumes();
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::DefineMaterials()
{
// Lead material defined using NIST Manager
auto nistManager = G4NistManager::Instance();
nistManager->FindOrBuildMaterial("G4_Pb");
// Liquid argon material
G4double a; // mass of a mole;
G4double z; // z=mean number of protons;
G4double density;
new G4Material("liquidArgon", z=18., a= 39.95*g/mole, density= 1.390*g/cm3);
// The argon by NIST Manager is a gas with a different density
// Vacuum
new G4Material("Galactic", z=1., a=1.01*g/mole,density= universe_mean_density,
kStateGas, 2.73*kelvin, 3.e-18*pascal);
// Print materials
G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4VPhysicalVolume* DetectorConstruction::DefineVolumes()
{
// Geometry parameters
G4int nofLayers = 10;
G4double absoThickness = 10.*mm;
G4double gapThickness = 5.*mm;
G4double calorSizeXY = 10.*cm;
auto layerThickness = absoThickness + gapThickness;
auto calorThickness = nofLayers * layerThickness;
auto worldSizeXY = 1.2 * calorSizeXY;
auto worldSizeZ = 1.2 * calorThickness;
// Get materials
auto defaultMaterial = G4Material::GetMaterial("Galactic");
auto absorberMaterial = G4Material::GetMaterial("G4_Pb");
auto gapMaterial = G4Material::GetMaterial("liquidArgon");
if ( ! defaultMaterial || ! absorberMaterial || ! gapMaterial ) {
G4ExceptionDescription msg;
msg << "Cannot retrieve materials already defined.";
G4Exception("DetectorConstruction::DefineVolumes()",
"MyCode0001", FatalException, msg);
}
//
// World
//
auto worldS
= new G4Box("World", // its name
worldSizeXY/2, worldSizeXY/2, worldSizeZ/2); // its size
auto worldLV
= new G4LogicalVolume(
worldS, // its solid
defaultMaterial, // its material
"World"); // its name
auto worldPV = new G4PVPlacement(nullptr, // no rotation
G4ThreeVector(), // at (0,0,0)
worldLV, // its logical volume
"World", // its name
nullptr, // its mother volume
false, // no boolean operation
0, // copy number
fCheckOverlaps); // checking overlaps
//
// Calorimeter
//
auto calorimeterS
= new G4Box("Calorimeter", // its name
calorSizeXY/2, calorSizeXY/2, calorThickness/2); // its size
auto calorLV
= new G4LogicalVolume(
calorimeterS, // its solid
defaultMaterial, // its material
"Calorimeter"); // its name
new G4PVPlacement(nullptr, // no rotation
G4ThreeVector(), // at (0,0,0)
calorLV, // its logical volume
"Calorimeter", // its name
worldLV, // its mother volume
false, // no boolean operation
0, // copy number
fCheckOverlaps); // checking overlaps
//
// Layer
//
auto layerS
= new G4Box("Layer", // its name
calorSizeXY/2, calorSizeXY/2, layerThickness/2); // its size
auto layerLV
= new G4LogicalVolume(
layerS, // its solid
defaultMaterial, // its material
"Layer"); // its name
new G4PVReplica(
"Layer", // its name
layerLV, // its logical volume
calorLV, // its mother
kZAxis, // axis of replication
nofLayers, // number of replica
layerThickness); // witdth of replica
//
// Absorber
//
auto absorberS
= new G4Box("Abso", // its name
calorSizeXY/2, calorSizeXY/2, absoThickness/2); // its size
auto absorberLV
= new G4LogicalVolume(
absorberS, // its solid
absorberMaterial, // its material
"Abso"); // its name
fAbsorberPV = new G4PVPlacement(nullptr, // no rotation
G4ThreeVector(0., 0., -gapThickness / 2), // its position
absorberLV, // its logical volume
"Abso", // its name
layerLV, // its mother volume
false, // no boolean operation
0, // copy number
fCheckOverlaps); // checking overlaps
//
// Gap
//
auto gapS
= new G4Box("Gap", // its name
calorSizeXY/2, calorSizeXY/2, gapThickness/2); // its size
auto gapLV
= new G4LogicalVolume(
gapS, // its solid
gapMaterial, // its material
"Gap"); // its name
fGapPV = new G4PVPlacement(nullptr, // no rotation
G4ThreeVector(0., 0., absoThickness / 2), // its position
gapLV, // its logical volume
"Gap", // its name
layerLV, // its mother volume
false, // no boolean operation
0, // copy number
fCheckOverlaps); // checking overlaps
//
// print parameters
//
G4cout
<< G4endl
<< "------------------------------------------------------------" << G4endl
<< "---> The calorimeter is " << nofLayers << " layers of: [ "
<< absoThickness/mm << "mm of " << absorberMaterial->GetName()
<< " + "
<< gapThickness/mm << "mm of " << gapMaterial->GetName() << " ] " << G4endl
<< "------------------------------------------------------------" << G4endl;
//
// Visualization attributes
//
worldLV->SetVisAttributes (G4VisAttributes::GetInvisible());
auto simpleBoxVisAtt= new G4VisAttributes(G4Colour(1.0,1.0,1.0));
simpleBoxVisAtt->SetVisibility(true);
calorLV->SetVisAttributes(simpleBoxVisAtt);
//
// Always return the physical World
//
return worldPV;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::ConstructSDandField()
{
// Create global magnetic field messenger.
// Uniform magnetic field is then created automatically if
// the field value is not zero.
G4ThreeVector fieldValue;
fMagFieldMessenger = new G4GlobalMagFieldMessenger(fieldValue);
fMagFieldMessenger->SetVerboseLevel(1);
// Register the field messenger for deleting
G4AutoDelete::Register(fMagFieldMessenger);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
}
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