Files
geant4/examples/extended/electromagnetic/TestEm3/src/DetectorConstruction.cc
T
2018-12-07 15:15:39 +01:00

545 lines
19 KiB
C++

//
// ********************************************************************
// * 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 electromagnetic/TestEm3/src/DetectorConstruction.cc
/// \brief Implementation of the DetectorConstruction class
//
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
#include "DetectorConstruction.hh"
#include "DetectorMessenger.hh"
#include "G4NistManager.hh"
#include "G4Material.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4PVReplica.hh"
#include "G4GeometryManager.hh"
#include "G4PhysicalVolumeStore.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4SolidStore.hh"
#include "G4RunManager.hh"
#include "G4SystemOfUnits.hh"
#include "G4UnitsTable.hh"
#include "G4PhysicalConstants.hh"
#include <iomanip>
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
DetectorConstruction::DetectorConstruction()
:G4VUserDetectorConstruction(),
fWorldMaterial(nullptr),fSolidWorld(nullptr),fLogicWorld(nullptr),
fPhysiWorld(nullptr),fSolidCalor(nullptr),fLogicCalor(nullptr),
fPhysiCalor(nullptr),fSolidLayer(nullptr),fLogicLayer(nullptr),
fPhysiLayer(nullptr)
{
for(G4int i=0; i<kMaxAbsor; ++i) {
fAbsorMaterial[i] = nullptr;
fAbsorThickness[i] = 0.0;
fSolidAbsor[i] = nullptr;
fLogicAbsor[i] = nullptr;
fPhysiAbsor[i] = nullptr;
}
// default parameter values of the calorimeter
fNbOfAbsor = 2;
fAbsorThickness[1] = 2.3*mm;
fAbsorThickness[2] = 5.7*mm;
fNbOfLayers = 50;
fCalorSizeYZ = 40.*cm;
ComputeCalorParameters();
// materials
DefineMaterials();
SetWorldMaterial("Galactic");
SetAbsorMaterial(1,"G4_Pb");
SetAbsorMaterial(2,"G4_lAr");
// create commands for interactive definition of the calorimeter
fDetectorMessenger = new DetectorMessenger(this);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
DetectorConstruction::~DetectorConstruction()
{
delete fDetectorMessenger;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::DefineMaterials()
{
// This function illustrates the possible ways to define materials using
// G4 database on G4Elements
G4NistManager* manager = G4NistManager::Instance();
manager->SetVerbose(0);
//
// define Elements
//
G4double z,a;
G4Element* H = manager->FindOrBuildElement(1);
G4Element* C = manager->FindOrBuildElement(6);
G4Element* N = manager->FindOrBuildElement(7);
G4Element* O = manager->FindOrBuildElement(8);
G4Element* Si = manager->FindOrBuildElement(14);
G4Element* Ge = manager->FindOrBuildElement(32);
G4Element* Sb = manager->FindOrBuildElement(51);
G4Element* I = manager->FindOrBuildElement(53);
G4Element* Cs = manager->FindOrBuildElement(55);
G4Element* Pb = manager->FindOrBuildElement(82);
G4Element* Bi = manager->FindOrBuildElement(83);
//
// define an Element from isotopes, by relative abundance
//
G4int iz, n; //iz=number of protons in an isotope;
// n=number of nucleons in an isotope;
G4int ncomponents;
G4double abundance;
G4Isotope* U5 = new G4Isotope("U235", iz=92, n=235, a=235.01*g/mole);
G4Isotope* U8 = new G4Isotope("U238", iz=92, n=238, a=238.03*g/mole);
G4Element* U = new G4Element("enriched Uranium", "U", ncomponents=2);
U->AddIsotope(U5, abundance= 90.*perCent);
U->AddIsotope(U8, abundance= 10.*perCent);
//
// define simple materials
//
G4double density;
new G4Material("liquidH2", z=1., a= 1.008*g/mole, density= 70.8*mg/cm3);
new G4Material("Aluminium", z=13., a= 26.98*g/mole, density= 2.700*g/cm3);
new G4Material("Titanium", z=22., a= 47.867*g/mole, density= 4.54*g/cm3);
new G4Material("Iron", z=26., a= 55.85*g/mole, density= 7.870*g/cm3);
new G4Material("Copper", z=29., a= 63.55*g/mole, density= 8.960*g/cm3);
new G4Material("Tungsten", z=74., a= 183.85*g/mole, density= 19.30*g/cm3);
new G4Material("Gold", z=79., a= 196.97*g/mole, density= 19.32*g/cm3);
new G4Material("Uranium", z=92., a= 238.03*g/mole, density= 18.95*g/cm3);
//
// define a material from elements. case 1: chemical molecule
//
G4int natoms;
G4Material* H2O =
new G4Material("Water", density= 1.000*g/cm3, ncomponents=2);
H2O->AddElement(H, natoms=2);
H2O->AddElement(O, natoms=1);
H2O->GetIonisation()->SetMeanExcitationEnergy(78.0*eV);
H2O->SetChemicalFormula("H_2O");
G4Material* CH =
new G4Material("Polystyrene", density= 1.032*g/cm3, ncomponents=2);
CH->AddElement(C, natoms=1);
CH->AddElement(H, natoms=1);
G4Material* Sci =
new G4Material("Scintillator", density= 1.032*g/cm3, ncomponents=2);
Sci->AddElement(C, natoms=9);
Sci->AddElement(H, natoms=10);
Sci->GetIonisation()->SetBirksConstant(0.126*mm/MeV);
G4Material* Lct =
new G4Material("Lucite", density= 1.185*g/cm3, ncomponents=3);
Lct->AddElement(C, 59.97*perCent);
Lct->AddElement(H, 8.07*perCent);
Lct->AddElement(O, 31.96*perCent);
G4Material* Sili =
new G4Material("Silicon", density= 2.330*g/cm3, ncomponents=1);
Sili->AddElement(Si, natoms=1);
G4Material* SiO2 =
new G4Material("quartz", density= 2.200*g/cm3, ncomponents=2);
SiO2->AddElement(Si, natoms=1);
SiO2->AddElement(O , natoms=2);
G4Material* G10 =
new G4Material("NemaG10", density= 1.700*g/cm3, ncomponents=4);
G10->AddElement(Si, natoms=1);
G10->AddElement(O , natoms=2);
G10->AddElement(C , natoms=3);
G10->AddElement(H , natoms=3);
G4Material* CsI =
new G4Material("CsI", density= 4.534*g/cm3, ncomponents=2);
CsI->AddElement(Cs, natoms=1);
CsI->AddElement(I , natoms=1);
CsI->GetIonisation()->SetMeanExcitationEnergy(553.1*eV);
G4Material* BGO =
new G4Material("BGO", density= 7.10*g/cm3, ncomponents=3);
BGO->AddElement(O , natoms=12);
BGO->AddElement(Ge, natoms= 3);
BGO->AddElement(Bi, natoms= 4);
//SiNx
density= 3.1 *g/cm3;
G4Material* SiNx= new G4Material("SiNx", density, ncomponents=3);
SiNx-> AddElement(Si, 300);
SiNx-> AddElement(N, 310);
SiNx-> AddElement(H, 6);
//
// define gaseous materials using G4 NIST database
//
G4double fractionmass;
G4Material* Air = manager->FindOrBuildMaterial("G4_AIR");
manager->ConstructNewGasMaterial("Air20","G4_AIR",293.*kelvin,1.*atmosphere);
G4Material* lAr = manager->FindOrBuildMaterial("G4_lAr");
G4Material* lArEm3 = new G4Material("liquidArgon", density= 1.390*g/cm3,
ncomponents=1);
lArEm3->AddMaterial(lAr, fractionmass=1.0);
//
// define a material from elements and others materials (mixture of mixtures)
//
G4Material* Lead = new G4Material("Lead",density=11.35*g/cm3,ncomponents=1);
Lead->AddElement(Pb, fractionmass=1.0);
G4Material* LeadSb = new G4Material("LeadSb", density=11.35*g/cm3,
ncomponents=2);
LeadSb->AddElement(Sb, fractionmass=4.*perCent);
LeadSb->AddElement(Pb, fractionmass=96.*perCent);
G4Material* Aerog = new G4Material("Aerogel", density= 0.200*g/cm3,
ncomponents=3);
Aerog->AddMaterial(SiO2, fractionmass=62.5*perCent);
Aerog->AddMaterial(H2O , fractionmass=37.4*perCent);
Aerog->AddElement (C , fractionmass= 0.1*perCent);
//
// examples of gas in non STP conditions
//
G4double temperature, pressure;
G4Material* CO2 =
new G4Material("CarbonicGas", density= 27.*mg/cm3, ncomponents=2,
kStateGas, temperature= 325.*kelvin, pressure= 50.*atmosphere);
CO2->AddElement(C, natoms=1);
CO2->AddElement(O, natoms=2);
G4Material* steam =
new G4Material("WaterSteam", density= 1.0*mg/cm3, ncomponents=1,
kStateGas, temperature= 273*kelvin, pressure= 1*atmosphere);
steam->AddMaterial(H2O, fractionmass=1.);
new G4Material("ArgonGas", z=18, a=39.948*g/mole, density= 1.782*mg/cm3,
kStateGas, 273.15*kelvin, 1*atmosphere);
//
// examples of vacuum
//
density = universe_mean_density; //from PhysicalConstants.h
pressure = 3.e-18*pascal;
temperature = 2.73*kelvin;
new G4Material("Galactic", z=1., a=1.008*g/mole, density,
kStateGas,temperature,pressure);
density = 1.e-5*g/cm3;
pressure = 2.e-2*bar;
temperature = STP_Temperature; //from PhysicalConstants.h
G4Material* beam =
new G4Material("Beam", density, ncomponents=1,
kStateGas,temperature,pressure);
beam->AddMaterial(Air, fractionmass=1.);
// G4cout << *(G4Material::GetMaterialTable()) << G4endl;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::ComputeCalorParameters()
{
// Compute derived parameters of the calorimeter
fLayerThickness = 0.;
for (G4int iAbs=1; iAbs<=fNbOfAbsor; iAbs++) {
fLayerThickness += fAbsorThickness[iAbs];
}
fCalorThickness = fNbOfLayers*fLayerThickness;
fWorldSizeX = 1.2*fCalorThickness;
fWorldSizeYZ = 1.2*fCalorSizeYZ;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4VPhysicalVolume* DetectorConstruction::Construct()
{
if(fPhysiWorld) { return fPhysiWorld; }
// complete the Calor parameters definition
ComputeCalorParameters();
//
// World
//
fSolidWorld = new G4Box("World", //its name
fWorldSizeX/2,fWorldSizeYZ/2,fWorldSizeYZ/2); //its size
fLogicWorld = new G4LogicalVolume(fSolidWorld, //its solid
fWorldMaterial, //its material
"World"); //its name
fPhysiWorld = new G4PVPlacement(0, //no rotation
G4ThreeVector(), //at (0,0,0)
fLogicWorld, //its fLogical volume
"World", //its name
0, //its mother volume
false, //no boolean operation
0); //copy number
//
// Calorimeter
//
fSolidCalor = new G4Box("Calorimeter",
fCalorThickness/2,fCalorSizeYZ/2,fCalorSizeYZ/2);
fLogicCalor = new G4LogicalVolume(fSolidCalor,
fWorldMaterial,
"Calorimeter");
fPhysiCalor = new G4PVPlacement(0, //no rotation
G4ThreeVector(), //at (0,0,0)
fLogicCalor, //its fLogical volume
"Calorimeter", //its name
fLogicWorld, //its mother volume
false, //no boolean operation
0); //copy number
//
// Layers
//
fSolidLayer = new G4Box("Layer",
fLayerThickness/2,fCalorSizeYZ/2,fCalorSizeYZ/2);
fLogicLayer = new G4LogicalVolume(fSolidLayer,
fWorldMaterial,
"Layer");
if (fNbOfLayers > 1) {
fPhysiLayer = new G4PVReplica("Layer",
fLogicLayer,
fLogicCalor,
kXAxis,
fNbOfLayers,
fLayerThickness);
} else {
fPhysiLayer = new G4PVPlacement(0,
G4ThreeVector(),
fLogicLayer,
"Layer",
fLogicCalor,
false,
0);
}
//
// Absorbers
//
G4double xfront = -0.5*fLayerThickness;
for (G4int k=1; k<=fNbOfAbsor; ++k) {
fSolidAbsor[k] = new G4Box("Absorber", //its name
fAbsorThickness[k]/2,fCalorSizeYZ/2,fCalorSizeYZ/2);
fLogicAbsor[k] = new G4LogicalVolume(fSolidAbsor[k], //its solid
fAbsorMaterial[k], //its material
fAbsorMaterial[k]->GetName());
G4double xcenter = xfront+0.5*fAbsorThickness[k];
xfront += fAbsorThickness[k];
fPhysiAbsor[k] = new G4PVPlacement(0,
G4ThreeVector(xcenter,0.,0.),
fLogicAbsor[k],
fAbsorMaterial[k]->GetName(),
fLogicLayer,
false,
k); //copy number
}
PrintCalorParameters();
//always return the fPhysical World
//
return fPhysiWorld;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::PrintCalorParameters()
{
G4cout << "\n-------------------------------------------------------------"
<< "\n ---> The calorimeter is " << fNbOfLayers << " layers of:";
for (G4int i=1; i<=fNbOfAbsor; ++i) {
G4cout << "\n \t" << std::setw(12) << fAbsorMaterial[i]->GetName() <<": "
<< std::setw(6) << G4BestUnit(fAbsorThickness[i],"Length");
}
G4cout << "\n-------------------------------------------------------------\n";
G4cout << "\n" << fWorldMaterial << G4endl;
for (G4int j=1; j<=fNbOfAbsor; ++j) {
G4cout << "\n" << fAbsorMaterial[j] << G4endl;
}
G4cout << "\n-------------------------------------------------------------\n";
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::SetWorldMaterial(const G4String& material)
{
// search the material by its name
G4Material* pttoMaterial =
G4NistManager::Instance()->FindOrBuildMaterial(material);
if(pttoMaterial) {
fWorldMaterial = pttoMaterial;
if(fLogicWorld) {
fLogicWorld->SetMaterial(fWorldMaterial);
fLogicLayer->SetMaterial(fWorldMaterial);
G4RunManager::GetRunManager()->PhysicsHasBeenModified();
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::SetNbOfLayers(G4int ival)
{
// set the number of Layers
//
if (ival < 1)
{ G4cout << "\n --->warning from SetfNbOfLayers: "
<< ival << " must be at least 1. Command refused" << G4endl;
return;
}
fNbOfLayers = ival;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::SetNbOfAbsor(G4int ival)
{
// set the number of Absorbers
//
if (ival < 1 || ival > (kMaxAbsor-1))
{ G4cout << "\n ---> warning from SetfNbOfAbsor: "
<< ival << " must be at least 1 and and most " << kMaxAbsor-1
<< ". Command refused" << G4endl;
return;
}
fNbOfAbsor = ival;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::SetAbsorMaterial(G4int ival,
const G4String& material)
{
// search the material by its name
//
if (ival > fNbOfAbsor || ival <= 0)
{ G4cout << "\n --->warning from SetAbsorMaterial: absor number "
<< ival << " out of range. Command refused" << G4endl;
return;
}
G4Material* pttoMaterial =
G4NistManager::Instance()->FindOrBuildMaterial(material);
if (pttoMaterial) {
fAbsorMaterial[ival] = pttoMaterial;
if(fLogicAbsor[ival]) {
fLogicAbsor[ival]->SetMaterial(pttoMaterial);
G4RunManager::GetRunManager()->PhysicsHasBeenModified();
}
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::SetAbsorThickness(G4int ival, G4double val)
{
// change Absorber thickness
//
if (ival > fNbOfAbsor || ival <= 0)
{ G4cout << "\n --->warning from SetAbsorThickness: absor number "
<< ival << " out of range. Command refused" << G4endl;
return;
}
if (val <= DBL_MIN)
{ G4cout << "\n --->warning from SetAbsorThickness: thickness "
<< val << " out of range. Command refused" << G4endl;
return;
}
fAbsorThickness[ival] = val;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void DetectorConstruction::SetCalorSizeYZ(G4double val)
{
// change the transverse size
//
if (val <= DBL_MIN)
{ G4cout << "\n --->warning from SetfCalorSizeYZ: thickness "
<< val << " out of range. Command refused" << G4endl;
return;
}
fCalorSizeYZ = val;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
#include "G4GlobalMagFieldMessenger.hh"
#include "G4AutoDelete.hh"
void DetectorConstruction::ConstructSDandField()
{
if ( fFieldMessenger.Get() == nullptr ) {
// Create global magnetic field messenger.
// Uniform magnetic field is then created automatically if
// the field value is not zero.
G4ThreeVector fieldValue = G4ThreeVector();
G4GlobalMagFieldMessenger* msg =
new G4GlobalMagFieldMessenger(fieldValue);
//msg->SetVerboseLevel(1);
G4AutoDelete::Register(msg);
fFieldMessenger.Put( msg );
}
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......