Gabriele Cosmo
203 lines
11 KiB
C++
Executable File
203 lines
11 KiB
C++
Executable File
//
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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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//
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "DetectorConstruction.hh"
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#include "DetectorMessenger.hh"
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#include "PrimaryGeneratorAction.hh"
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#include "G4Material.hh"
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#include "G4NistManager.hh"
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#include "G4Box.hh"
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#include "G4Tubs.hh"
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#include "G4LogicalVolume.hh"
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#include "G4ThreeVector.hh"
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#include "G4PVPlacement.hh"
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#include "globals.hh"
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#include "G4GeometryManager.hh"
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#include "G4PhysicalVolumeStore.hh"
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#include "G4LogicalVolumeStore.hh"
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#include "G4SolidStore.hh"
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#include "G4RunManager.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4UniformMagField.hh"
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#include "G4FieldManager.hh"
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#include "G4TransportationManager.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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DetectorConstruction::DetectorConstruction() : G4VUserDetectorConstruction(),
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fTargetMaterial( nullptr ),
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fLogicExperimentalHall( nullptr ), fPhysExperimentalHall( nullptr ),
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fLogicTargetLayer( nullptr ), fPhysTargetLayer( nullptr ),
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fFieldMgr( nullptr ), fUniformMagField( nullptr ),
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fDetectorMessenger( nullptr ),
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fTargetInnerRadius( 9.0*mm ), fTargetOuterRadius( 11.0*mm ) //***LOOKHERE*** Default values
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{
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fFieldMgr = G4TransportationManager::GetTransportationManager()->GetFieldManager();
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//***LOOKHERE*** Default material
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fTargetMaterial = G4NistManager::Instance()->FindOrBuildMaterial( "G4_Be" );
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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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delete fUniformMagField;
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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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return ConstructLayer();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4VPhysicalVolume* DetectorConstruction::ConstructLayer() {
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// Clean old geometry, if any
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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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// The geometry consists of a cylinder with axis along the z-direction, and
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// positioned at the center, (0.0, 0.0, 0.0). Its inner and outer radius, and
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// its material can be set via UI commands.
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// The world volume (experimental hall) is a box slightly bigger than the cylinder
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// and it is filled of "G4_Galactic" material.
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const G4double halfLength = 1.0*m; //***LOOKHERE*** Half-length of the cylinder
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const G4double expHall_x = 1.01*halfLength; // half dimension along x
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const G4double expHall_y = 1.01*halfLength; // half dimension along y
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const G4double expHall_z = 1.01*halfLength; // half dimension along z
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G4Material* vacuum = G4NistManager::Instance()->FindOrBuildMaterial( "G4_Galactic" );
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G4Box* experimentalHallBox = new G4Box( "expHallBox", expHall_x, expHall_y, expHall_z );
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fLogicExperimentalHall = new G4LogicalVolume( experimentalHallBox, // solid
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vacuum, // material
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"logicExpHall", // name
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0, // field manager
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0, // sensitive detector
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0 ); // user limits
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fPhysExperimentalHall = new G4PVPlacement( 0, // rotation
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G4ThreeVector(), // translation
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"expHall", // name
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fLogicExperimentalHall, // logical volume
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0, // mother physical volume
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false, // boolean operation
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0 ); // copy number
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// Cylinder along the z-axis, with inner and outer diameter
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G4Tubs* solidTargetLayer = new G4Tubs( "solidTargetLayer",
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fTargetInnerRadius, // inner radius
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fTargetOuterRadius, // outer radius
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halfLength, // half cylinder length in z
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0.0, // starting phi angle in rad
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2.0*pi ); // final phi angle in rad
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fLogicTargetLayer = new G4LogicalVolume( solidTargetLayer, // solid
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fTargetMaterial, // material
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"logicTargetLayer", // name
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0, // field manager
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0, // sensitive detector
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0 ); // user limits
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fPhysTargetLayer = new G4PVPlacement( 0, // rotation
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G4ThreeVector(), // translation
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"physTargetLayer", // name
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fLogicTargetLayer, // logical volume
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fPhysExperimentalHall, // mother physical volume
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false, // boolean operation
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0 ); // copy number
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PrintParameters();
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G4cout << G4endl
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<< "DetectorConstruction::ConstructLayer() : " << G4endl
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<< "\t World (box) size: " << G4endl
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<< "\t \t x : -/+ " << expHall_x << " mm ;"
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<< "\t y : -/+ " << expHall_y << " mm ;"
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<< "\t z : -/+ " << expHall_z << " mm ;" << G4endl
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<< "\t Layer (cylinder) size : " << G4endl
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<< "\t \t radii : " << fTargetInnerRadius << " , " << fTargetOuterRadius << " mm ;"
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<< "\t \t length (along z) : " << 2.0*halfLength << " mm ;" << G4endl
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<< G4endl << G4endl;
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return fPhysExperimentalHall;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetTargetMaterial( const G4String name ) {
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fTargetMaterial = G4NistManager::Instance()->FindOrBuildMaterial( name );
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if ( ! fTargetMaterial ) {
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G4cout << G4endl << G4endl
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<< "WARNING: the name of the material has not been recognized!" << G4endl
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<< " ===> the default * G4_Be * will be used." << G4endl << G4endl;
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//***LOOKHERE*** Default material
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fTargetMaterial = G4NistManager::Instance()->FindOrBuildMaterial( "G4_Be" );
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}
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if ( fLogicTargetLayer ) fLogicTargetLayer->SetMaterial( fTargetMaterial );
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::UpdateGeometry() {
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G4RunManager::GetRunManager()->ReinitializeGeometry();
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PrintParameters();
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// Update also the position of the gun
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const PrimaryGeneratorAction* pPrimaryAction = dynamic_cast< const PrimaryGeneratorAction* >
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( G4RunManager::GetRunManager()->GetUserPrimaryGeneratorAction() );
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if ( pPrimaryAction ) pPrimaryAction->SetGunPosition();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::PrintParameters() {
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G4cout << G4endl << G4endl
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<< " ------ DetectorConstruction::PrintParameters() ------ " << G4endl
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<< " Material = " << fTargetMaterial->GetName() << G4endl
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<< " Target Inner Radius = " << fTargetInnerRadius << " mm" << G4endl
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<< " Target Outer Radius = " << fTargetOuterRadius << " mm" << G4endl
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<< " B [T] = "
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<< ( fUniformMagField ? fUniformMagField->GetConstantFieldValue()/CLHEP::tesla :
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G4ThreeVector(0.0, 0.0, 0.0) ) << G4endl
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<< " ------------------------------------------------------ " << G4endl << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetMagField( const G4double fieldValue ) {
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if ( fUniformMagField ) delete fUniformMagField;
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if ( std::abs( fieldValue ) > 0.0 ) {
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// Apply a global uniform magnetic field along the Z axis
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fUniformMagField = new G4UniformMagField( G4ThreeVector( 0.0, 0.0, fieldValue ) );
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fFieldMgr->SetDetectorField( fUniformMagField );
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fFieldMgr->CreateChordFinder( fUniformMagField );
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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