Gabriele Cosmo
423 lines
15 KiB
C++
423 lines
15 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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// $Id: DetectorConstruction.cc,v 1.13 2006/09/25 17:06:29 maire Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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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 "G4Material.hh"
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#include "G4Box.hh"
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#include "G4LogicalVolume.hh"
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#include "G4PVPlacement.hh"
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#include "G4UniformMagField.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 "G4UnitsTable.hh"
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#include "G4NistManager.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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DetectorConstruction::DetectorConstruction()
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:AbsorberMaterial(0),WorldMaterial(0),defaultWorld(true),
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solidWorld(0),logicWorld(0),physiWorld(0),
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solidAbsorber(0),logicAbsorber(0),physiAbsorber(0),
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magField(0)
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{
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// default parameter values of the calorimeter
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AbsorberThickness = 1.*cm;
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AbsorberSizeYZ = 2.*cm;
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XposAbs = 0.*cm;
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ComputeCalorParameters();
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// materials
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DefineMaterials();
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SetWorldMaterial ("Galactic");
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SetAbsorberMaterial("Silicon");
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// create commands for interactive definition of the calorimeter
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detectorMessenger = 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 detectorMessenger;
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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 ConstructCalorimeter();
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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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//This function illustrates the possible ways to define materials
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G4String symbol; //a=mass of a mole;
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G4double a, z, density; //z=mean number of protons;
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G4int ncomponents, natoms;
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G4double fractionmass;
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G4double temperature, pressure;
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//
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// define Elements
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//
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G4Element* H = new G4Element("Hydrogen",symbol="H", z= 1, a= 1.01*g/mole);
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G4Element* C = new G4Element("Carbon", symbol="C", z= 6, a= 12.01*g/mole);
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G4Element* N = new G4Element("Nitrogen",symbol="N", z= 7, a= 14.01*g/mole);
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G4Element* O = new G4Element("Oxygen", symbol="O", z= 8, a= 16.00*g/mole);
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G4Element* Na = new G4Element("Sodium", symbol="Na", z=11, a= 22.99*g/mole);
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G4Element* Ar = new G4Element("Argon", symbol="Ar", z=18, a= 39.95*g/mole);
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G4Element* I = new G4Element("Iodine", symbol="I" , z=53, a= 126.90*g/mole);
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G4Element* Xe = new G4Element("Xenon", symbol="Xe", z=54, a= 131.29*g/mole);
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//
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// define simple materials
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//
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new G4Material("H2Liq" , z= 1, a= 1.01*g/mole, density= 70.8*mg/cm3);
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new G4Material("Beryllium", z= 4, a= 9.01*g/mole, density= 1.848*g/cm3);
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new G4Material("Aluminium", z=13, a=26.98*g/mole, density= 2.700*g/cm3);
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new G4Material("Silicon" , z=14, a=28.09*g/mole, density= 2.330*g/cm3);
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G4Material* lAr =
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new G4Material("liquidArgon", density= 1.390*g/cm3, ncomponents=1);
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lAr->AddElement(Ar, natoms=1);
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new G4Material("Iron", z=26, a= 55.85*g/mole, density= 7.870*g/cm3);
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new G4Material("Copper", z=29, a= 63.55*g/mole, density= 8.960*g/cm3);
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new G4Material("Silver", z=47, a=107.87*g/mole, density= 10.50*g/cm3);
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new G4Material("Tungsten", z=74, a=183.85*g/mole, density= 19.30*g/cm3);
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new G4Material("Gold", z=79, a=196.97*g/mole, density= 19.32*g/cm3);
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new G4Material("Lead", z=82, a=207.19*g/mole, density= 11.35*g/cm3);
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//
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// define a material from elements. case 1: chemical molecule
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//
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G4Material* H2O = new G4Material("Water", density= 1.000*g/cm3, ncomponents=2);
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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(75*eV);
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G4Material* CH = new G4Material("Plastic", density= 1.04*g/cm3, ncomponents=2);
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CH->AddElement(C, natoms=1);
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CH->AddElement(H, natoms=1);
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G4Material* NaI = new G4Material("NaI", density= 3.67*g/cm3, ncomponents=2);
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NaI->AddElement(Na, natoms=1);
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NaI->AddElement(I , natoms=1);
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NaI->GetIonisation()->SetMeanExcitationEnergy(452*eV);
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//
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// define a material from elements. case 2: mixture by fractional mass
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//
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G4Material* Air = new G4Material("Air", density= 1.290*mg/cm3, ncomponents=2);
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Air->AddElement(N, fractionmass=0.7);
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Air->AddElement(O, fractionmass=0.3);
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G4Material* Air20 =
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new G4Material("Air20", density= 1.205*mg/cm3, ncomponents=2,
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kStateGas, 293.*kelvin, 1.*atmosphere);
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Air20->AddElement(N, fractionmass=0.7);
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Air20->AddElement(O, fractionmass=0.3);
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//Graphite
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//
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G4Material* Graphite =
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new G4Material("Graphite", density= 1.7*g/cm3, ncomponents=1);
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Graphite->AddElement(C, fractionmass=1.);
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//Havar
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//
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G4Element* Cr = new G4Element("Chrome", "Cr", z=25, a= 51.996*g/mole);
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G4Element* Fe = new G4Element("Iron" , "Fe", z=26, a= 55.845*g/mole);
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G4Element* Co = new G4Element("Cobalt", "Co", z=27, a= 58.933*g/mole);
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G4Element* Ni = new G4Element("Nickel", "Ni", z=28, a= 58.693*g/mole);
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G4Element* W = new G4Element("Tungsten","W", z=74, a= 183.850*g/mole);
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G4Material* Havar =
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new G4Material("Havar", density= 8.3*g/cm3, ncomponents=5);
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Havar->AddElement(Cr, fractionmass=0.1785);
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Havar->AddElement(Fe, fractionmass=0.1822);
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Havar->AddElement(Co, fractionmass=0.4452);
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Havar->AddElement(Ni, fractionmass=0.1310);
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Havar->AddElement(W , fractionmass=0.0631);
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//
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// examples of gas
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//
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new G4Material("ArgonGas", z=18, a=39.948*g/mole, density= 1.782*mg/cm3,
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kStateGas, 273.15*kelvin, 1*atmosphere);
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new G4Material("XenonGas", z=54, a=131.29*g/mole, density= 5.458*mg/cm3,
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kStateGas, 293.15*kelvin, 1*atmosphere);
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G4Material* CO2 =
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new G4Material("CarbonicGas", density= 1.977*mg/cm3, ncomponents=2);
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CO2->AddElement(C, natoms=1);
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CO2->AddElement(O, natoms=2);
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G4Material* ArCO2 =
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new G4Material("ArgonCO2", density= 1.8223*mg/cm3, ncomponents=2);
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ArCO2->AddElement (Ar, fractionmass=0.7844);
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ArCO2->AddMaterial(CO2, fractionmass=0.2156);
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//another way to define mixture of gas per volume
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G4Material* NewArCO2 =
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new G4Material("NewArgonCO2", density= 1.8223*mg/cm3, ncomponents=3);
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NewArCO2->AddElement (Ar, natoms=8);
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NewArCO2->AddElement (C, natoms=2);
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NewArCO2->AddElement (O, natoms=4);
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G4Material* ArCH4 =
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new G4Material("ArgonCH4", density= 1.709*mg/cm3, ncomponents=3);
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ArCH4->AddElement (Ar, natoms=93);
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ArCH4->AddElement (C, natoms=7);
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ArCH4->AddElement (H, natoms=28);
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G4Material* XeCH =
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new G4Material("XenonMethanePropane", density= 4.9196*mg/cm3, ncomponents=3,
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kStateGas, 293.15*kelvin, 1*atmosphere);
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XeCH->AddElement (Xe, natoms=875);
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XeCH->AddElement (C, natoms=225);
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XeCH->AddElement (H, natoms=700);
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G4Material* steam =
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new G4Material("WaterSteam", density= 1.0*mg/cm3, ncomponents=1);
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steam->AddMaterial(H2O, fractionmass=1.);
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steam->GetIonisation()->SetMeanExcitationEnergy(71.6*eV);
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//
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// example of vacuum
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//
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density = universe_mean_density; //from PhysicalConstants.h
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pressure = 3.e-18*pascal;
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temperature = 2.73*kelvin;
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new G4Material("Galactic", z=1, a=1.01*g/mole,density,
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kStateGas,temperature,pressure);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::ComputeCalorParameters()
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{
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// Compute derived parameters of the calorimeter
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xstartAbs = XposAbs-0.5*AbsorberThickness;
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xendAbs = XposAbs+0.5*AbsorberThickness;
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if (defaultWorld) {
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WorldSizeX = 1.5*AbsorberThickness; WorldSizeYZ= 1.2*AbsorberSizeYZ;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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G4VPhysicalVolume* DetectorConstruction::ConstructCalorimeter()
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{
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// Cleanup old geometry
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//
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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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// complete the Calor parameters definition
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ComputeCalorParameters();
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// World
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//
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solidWorld = new G4Box("World", //its name
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WorldSizeX/2,WorldSizeYZ/2,WorldSizeYZ/2); //its size
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logicWorld = new G4LogicalVolume(solidWorld, //its solid
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WorldMaterial, //its material
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"World"); //its name
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physiWorld = new G4PVPlacement(0, //no rotation
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G4ThreeVector(), //at (0,0,0)
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logicWorld, //its logical volume
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"World", //its name
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0, //its 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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solidAbsorber = new G4Box("Absorber",
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AbsorberThickness/2,AbsorberSizeYZ/2,AbsorberSizeYZ/2);
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logicAbsorber = new G4LogicalVolume(solidAbsorber, //its solid
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AbsorberMaterial, //its material
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"Absorber"); //its name
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physiAbsorber = new G4PVPlacement(0, //no rotation
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G4ThreeVector(XposAbs,0.,0.), //its position
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logicAbsorber, //its logical volume
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"Absorber", //its name
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logicWorld, //its mother
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false, //no boulean operat
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0); //copy number
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PrintCalorParameters();
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//always return the physical World
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//
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return physiWorld;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::PrintCalorParameters()
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{
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G4cout << "\n" << WorldMaterial << G4endl;
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G4cout << "\n" << AbsorberMaterial << G4endl;
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G4cout << "\n The WORLD is made of " << G4BestUnit(WorldSizeX,"Length")
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<< " of " << WorldMaterial->GetName();
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G4cout << ". The transverse size (YZ) of the world is "
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<< G4BestUnit(WorldSizeYZ,"Length") << G4endl;
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G4cout << " The ABSORBER is made of "
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<<G4BestUnit(AbsorberThickness,"Length")
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<< " of " << AbsorberMaterial->GetName();
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G4cout << ". The transverse size (YZ) is "
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<< G4BestUnit(AbsorberSizeYZ,"Length") << G4endl;
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G4cout << " X position of the middle of the absorber "
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<< G4BestUnit(XposAbs,"Length");
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G4cout << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetAbsorberMaterial(G4String materialChoice)
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{
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// search the material by its name
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G4Material* pttoMaterial =
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G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
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if (pttoMaterial) AbsorberMaterial = pttoMaterial;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetWorldMaterial(G4String materialChoice)
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{
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// search the material by its name
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G4Material* pttoMaterial =
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G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
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if (pttoMaterial) WorldMaterial = pttoMaterial;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetAbsorberThickness(G4double val)
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{
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AbsorberThickness = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetAbsorberSizeYZ(G4double val)
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{
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AbsorberSizeYZ = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetWorldSizeX(G4double val)
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{
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WorldSizeX = val;
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defaultWorld = false;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetWorldSizeYZ(G4double val)
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{
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WorldSizeYZ = val;
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defaultWorld = false;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetAbsorberXpos(G4double val)
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{
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XposAbs = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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#include "G4FieldManager.hh"
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#include "G4TransportationManager.hh"
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void DetectorConstruction::SetMagField(G4double fieldValue)
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{
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//apply a global uniform magnetic field along Z axis
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G4FieldManager* fieldMgr
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= G4TransportationManager::GetTransportationManager()->GetFieldManager();
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if(magField) delete magField; //delete the existing magn field
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if(fieldValue!=0.) // create a new one if non nul
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{ magField = new G4UniformMagField(G4ThreeVector(0.,0.,fieldValue));
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fieldMgr->SetDetectorField(magField);
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fieldMgr->CreateChordFinder(magField);
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} else {
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magField = NULL;
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fieldMgr->SetDetectorField(magField);
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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#include "G4RunManager.hh"
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void DetectorConstruction::UpdateGeometry()
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{
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G4RunManager::GetRunManager()->DefineWorldVolume(ConstructCalorimeter());
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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