545 lines
19 KiB
C++
545 lines
19 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 electromagnetic/TestEm3/src/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 "G4NistManager.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 "G4PVReplica.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 "G4UnitsTable.hh"
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#include "G4PhysicalConstants.hh"
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#include <iomanip>
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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DetectorConstruction::DetectorConstruction()
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:G4VUserDetectorConstruction(),
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fWorldMaterial(nullptr),fSolidWorld(nullptr),fLogicWorld(nullptr),
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fPhysiWorld(nullptr),fSolidCalor(nullptr),fLogicCalor(nullptr),
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fPhysiCalor(nullptr),fSolidLayer(nullptr),fLogicLayer(nullptr),
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fPhysiLayer(nullptr)
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{
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for(G4int i=0; i<kMaxAbsor; ++i) {
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fAbsorMaterial[i] = nullptr;
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fAbsorThickness[i] = 0.0;
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fSolidAbsor[i] = nullptr;
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fLogicAbsor[i] = nullptr;
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fPhysiAbsor[i] = nullptr;
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}
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// default parameter values of the calorimeter
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fNbOfAbsor = 2;
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fAbsorThickness[1] = 2.3*mm;
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fAbsorThickness[2] = 5.7*mm;
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fNbOfLayers = 50;
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fCalorSizeYZ = 40.*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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SetAbsorMaterial(1,"G4_Pb");
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SetAbsorMaterial(2,"G4_lAr");
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// create commands for interactive definition of the calorimeter
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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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void DetectorConstruction::DefineMaterials()
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{
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// This function illustrates the possible ways to define materials using
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// G4 database on G4Elements
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G4NistManager* manager = G4NistManager::Instance();
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manager->SetVerbose(0);
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//
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// define Elements
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//
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G4double z,a;
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G4Element* H = manager->FindOrBuildElement(1);
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G4Element* C = manager->FindOrBuildElement(6);
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G4Element* N = manager->FindOrBuildElement(7);
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G4Element* O = manager->FindOrBuildElement(8);
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G4Element* Si = manager->FindOrBuildElement(14);
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G4Element* Ge = manager->FindOrBuildElement(32);
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G4Element* Sb = manager->FindOrBuildElement(51);
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G4Element* I = manager->FindOrBuildElement(53);
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G4Element* Cs = manager->FindOrBuildElement(55);
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G4Element* Pb = manager->FindOrBuildElement(82);
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G4Element* Bi = manager->FindOrBuildElement(83);
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//
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// define an Element from isotopes, by relative abundance
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//
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G4int iz, n; //iz=number of protons in an isotope;
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// n=number of nucleons in an isotope;
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G4int ncomponents;
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G4double abundance;
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G4Isotope* U5 = new G4Isotope("U235", iz=92, n=235, a=235.01*g/mole);
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G4Isotope* U8 = new G4Isotope("U238", iz=92, n=238, a=238.03*g/mole);
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G4Element* U = new G4Element("enriched Uranium", "U", ncomponents=2);
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U->AddIsotope(U5, abundance= 90.*perCent);
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U->AddIsotope(U8, abundance= 10.*perCent);
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//
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// define simple materials
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//
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G4double density;
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new G4Material("liquidH2", z=1., a= 1.008*g/mole, density= 70.8*mg/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("Titanium", z=22., a= 47.867*g/mole, density= 4.54*g/cm3);
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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("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("Uranium", z=92., a= 238.03*g/mole, density= 18.95*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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G4int natoms;
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G4Material* H2O =
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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(78.0*eV);
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H2O->SetChemicalFormula("H_2O");
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G4Material* CH =
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new G4Material("Polystyrene", density= 1.032*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* Sci =
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new G4Material("Scintillator", density= 1.032*g/cm3, ncomponents=2);
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Sci->AddElement(C, natoms=9);
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Sci->AddElement(H, natoms=10);
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Sci->GetIonisation()->SetBirksConstant(0.126*mm/MeV);
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G4Material* Lct =
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new G4Material("Lucite", density= 1.185*g/cm3, ncomponents=3);
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Lct->AddElement(C, 59.97*perCent);
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Lct->AddElement(H, 8.07*perCent);
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Lct->AddElement(O, 31.96*perCent);
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G4Material* Sili =
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new G4Material("Silicon", density= 2.330*g/cm3, ncomponents=1);
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Sili->AddElement(Si, natoms=1);
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G4Material* SiO2 =
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new G4Material("quartz", density= 2.200*g/cm3, ncomponents=2);
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SiO2->AddElement(Si, natoms=1);
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SiO2->AddElement(O , natoms=2);
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G4Material* G10 =
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new G4Material("NemaG10", density= 1.700*g/cm3, ncomponents=4);
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G10->AddElement(Si, natoms=1);
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G10->AddElement(O , natoms=2);
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G10->AddElement(C , natoms=3);
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G10->AddElement(H , natoms=3);
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G4Material* CsI =
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new G4Material("CsI", density= 4.534*g/cm3, ncomponents=2);
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CsI->AddElement(Cs, natoms=1);
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CsI->AddElement(I , natoms=1);
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CsI->GetIonisation()->SetMeanExcitationEnergy(553.1*eV);
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G4Material* BGO =
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new G4Material("BGO", density= 7.10*g/cm3, ncomponents=3);
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BGO->AddElement(O , natoms=12);
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BGO->AddElement(Ge, natoms= 3);
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BGO->AddElement(Bi, natoms= 4);
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//SiNx
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density= 3.1 *g/cm3;
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G4Material* SiNx= new G4Material("SiNx", density, ncomponents=3);
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SiNx-> AddElement(Si, 300);
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SiNx-> AddElement(N, 310);
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SiNx-> AddElement(H, 6);
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//
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// define gaseous materials using G4 NIST database
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//
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G4double fractionmass;
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G4Material* Air = manager->FindOrBuildMaterial("G4_AIR");
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manager->ConstructNewGasMaterial("Air20","G4_AIR",293.*kelvin,1.*atmosphere);
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G4Material* lAr = manager->FindOrBuildMaterial("G4_lAr");
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G4Material* lArEm3 = new G4Material("liquidArgon", density= 1.390*g/cm3,
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ncomponents=1);
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lArEm3->AddMaterial(lAr, fractionmass=1.0);
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//
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// define a material from elements and others materials (mixture of mixtures)
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//
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G4Material* Lead = new G4Material("Lead",density=11.35*g/cm3,ncomponents=1);
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Lead->AddElement(Pb, fractionmass=1.0);
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G4Material* LeadSb = new G4Material("LeadSb", density=11.35*g/cm3,
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ncomponents=2);
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LeadSb->AddElement(Sb, fractionmass=4.*perCent);
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LeadSb->AddElement(Pb, fractionmass=96.*perCent);
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G4Material* Aerog = new G4Material("Aerogel", density= 0.200*g/cm3,
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ncomponents=3);
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Aerog->AddMaterial(SiO2, fractionmass=62.5*perCent);
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Aerog->AddMaterial(H2O , fractionmass=37.4*perCent);
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Aerog->AddElement (C , fractionmass= 0.1*perCent);
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//
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// examples of gas in non STP conditions
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//
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G4double temperature, pressure;
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G4Material* CO2 =
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new G4Material("CarbonicGas", density= 27.*mg/cm3, ncomponents=2,
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kStateGas, temperature= 325.*kelvin, pressure= 50.*atmosphere);
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CO2->AddElement(C, natoms=1);
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CO2->AddElement(O, natoms=2);
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G4Material* steam =
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new G4Material("WaterSteam", density= 1.0*mg/cm3, ncomponents=1,
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kStateGas, temperature= 273*kelvin, pressure= 1*atmosphere);
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steam->AddMaterial(H2O, fractionmass=1.);
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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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//
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// examples 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=1.008*g/mole, density,
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kStateGas,temperature,pressure);
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density = 1.e-5*g/cm3;
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pressure = 2.e-2*bar;
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temperature = STP_Temperature; //from PhysicalConstants.h
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G4Material* beam =
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new G4Material("Beam", density, ncomponents=1,
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kStateGas,temperature,pressure);
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beam->AddMaterial(Air, fractionmass=1.);
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// G4cout << *(G4Material::GetMaterialTable()) << G4endl;
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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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fLayerThickness = 0.;
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for (G4int iAbs=1; iAbs<=fNbOfAbsor; iAbs++) {
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fLayerThickness += fAbsorThickness[iAbs];
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}
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fCalorThickness = fNbOfLayers*fLayerThickness;
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fWorldSizeX = 1.2*fCalorThickness;
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fWorldSizeYZ = 1.2*fCalorSizeYZ;
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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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if(fPhysiWorld) { return fPhysiWorld; }
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// complete the Calor parameters definition
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ComputeCalorParameters();
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//
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// World
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//
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fSolidWorld = new G4Box("World", //its name
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fWorldSizeX/2,fWorldSizeYZ/2,fWorldSizeYZ/2); //its size
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fLogicWorld = new G4LogicalVolume(fSolidWorld, //its solid
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fWorldMaterial, //its material
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"World"); //its name
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fPhysiWorld = new G4PVPlacement(0, //no rotation
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G4ThreeVector(), //at (0,0,0)
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fLogicWorld, //its fLogical 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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//
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// Calorimeter
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//
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fSolidCalor = new G4Box("Calorimeter",
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fCalorThickness/2,fCalorSizeYZ/2,fCalorSizeYZ/2);
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fLogicCalor = new G4LogicalVolume(fSolidCalor,
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fWorldMaterial,
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"Calorimeter");
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fPhysiCalor = new G4PVPlacement(0, //no rotation
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G4ThreeVector(), //at (0,0,0)
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fLogicCalor, //its fLogical volume
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"Calorimeter", //its name
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fLogicWorld, //its mother volume
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false, //no boolean operation
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0); //copy number
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//
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// Layers
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//
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fSolidLayer = new G4Box("Layer",
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fLayerThickness/2,fCalorSizeYZ/2,fCalorSizeYZ/2);
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fLogicLayer = new G4LogicalVolume(fSolidLayer,
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fWorldMaterial,
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"Layer");
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if (fNbOfLayers > 1) {
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fPhysiLayer = new G4PVReplica("Layer",
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fLogicLayer,
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fLogicCalor,
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kXAxis,
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fNbOfLayers,
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fLayerThickness);
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} else {
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fPhysiLayer = new G4PVPlacement(0,
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G4ThreeVector(),
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fLogicLayer,
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"Layer",
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fLogicCalor,
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false,
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0);
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}
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//
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// Absorbers
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//
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G4double xfront = -0.5*fLayerThickness;
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for (G4int k=1; k<=fNbOfAbsor; ++k) {
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fSolidAbsor[k] = new G4Box("Absorber", //its name
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fAbsorThickness[k]/2,fCalorSizeYZ/2,fCalorSizeYZ/2);
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fLogicAbsor[k] = new G4LogicalVolume(fSolidAbsor[k], //its solid
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fAbsorMaterial[k], //its material
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fAbsorMaterial[k]->GetName());
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G4double xcenter = xfront+0.5*fAbsorThickness[k];
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xfront += fAbsorThickness[k];
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fPhysiAbsor[k] = new G4PVPlacement(0,
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G4ThreeVector(xcenter,0.,0.),
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fLogicAbsor[k],
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fAbsorMaterial[k]->GetName(),
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fLogicLayer,
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false,
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k); //copy number
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}
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PrintCalorParameters();
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//always return the fPhysical World
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//
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return fPhysiWorld;
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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-------------------------------------------------------------"
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<< "\n ---> The calorimeter is " << fNbOfLayers << " layers of:";
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for (G4int i=1; i<=fNbOfAbsor; ++i) {
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G4cout << "\n \t" << std::setw(12) << fAbsorMaterial[i]->GetName() <<": "
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<< std::setw(6) << G4BestUnit(fAbsorThickness[i],"Length");
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}
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G4cout << "\n-------------------------------------------------------------\n";
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G4cout << "\n" << fWorldMaterial << G4endl;
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for (G4int j=1; j<=fNbOfAbsor; ++j) {
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G4cout << "\n" << fAbsorMaterial[j] << G4endl;
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}
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G4cout << "\n-------------------------------------------------------------\n";
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetWorldMaterial(const G4String& material)
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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(material);
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if(pttoMaterial) {
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fWorldMaterial = pttoMaterial;
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if(fLogicWorld) {
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fLogicWorld->SetMaterial(fWorldMaterial);
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fLogicLayer->SetMaterial(fWorldMaterial);
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G4RunManager::GetRunManager()->PhysicsHasBeenModified();
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}
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetNbOfLayers(G4int ival)
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{
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// set the number of Layers
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//
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if (ival < 1)
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{ G4cout << "\n --->warning from SetfNbOfLayers: "
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<< ival << " must be at least 1. Command refused" << G4endl;
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return;
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}
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fNbOfLayers = ival;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void DetectorConstruction::SetNbOfAbsor(G4int ival)
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{
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// set the number of Absorbers
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//
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if (ival < 1 || ival > (kMaxAbsor-1))
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{ G4cout << "\n ---> warning from SetfNbOfAbsor: "
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<< ival << " must be at least 1 and and most " << kMaxAbsor-1
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<< ". Command refused" << G4endl;
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return;
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}
|
|
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......
|