Gabriele Cosmo
252 lines
10 KiB
C++
252 lines
10 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 eventgenerator/HepMC/MCTruth/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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// $Id: DetectorConstruction.cc 99841 2016-10-07 10:09:34Z gcosmo $
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//
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//
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// --------------------------------------------------------------
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// GEANT 4 - DetectorConstruction class
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// --------------------------------------------------------------
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//
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// Author: Witold POKORSKI (Witold.Pokorski@cern.ch)
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//
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// --------------------------------------------------------------
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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#include "DetectorConstruction.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 "G4ThreeVector.hh"
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#include "G4PVPlacement.hh"
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#include "globals.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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DetectorConstruction::DetectorConstruction() :
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Iron(0), Copper(0), Tungsten(0), Lead(0), Uranium(0), PbWO4(0),
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Polystyrene(0), LiquidArgon(0),
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theAbsorberMaterial(0),
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logicAbsorber(0), physiAbsorber(0) {}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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DetectorConstruction::~DetectorConstruction() {}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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G4VPhysicalVolume* DetectorConstruction::Construct()
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{
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//------------------- materials ------------------------
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G4double a; // atomic mass
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G4double z; // atomic number
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G4double density, pressure, temperature, fractionmass;
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G4String name, symbol;
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G4int nel, natoms;
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//--- elements
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a = 1.01*g/mole;
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G4Element* elH = new G4Element(name="Hydrogen", symbol="H2", z=1., a);
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a = 12.01*g/mole;
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G4Element* elC = new G4Element(name="Carbon", symbol="C", z=6., a);
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a = 14.01*g/mole;
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G4Element* elN = new G4Element(name="Nitrogen", symbol="N2", z=7., a);
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a = 16.00*g/mole;
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G4Element* elO = new G4Element(name="Oxygen", symbol="O2", z=8., a);
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a = 183.85*g/mole;
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G4Element* elW = new G4Element(name="Tungsten", symbol="W", z=74., a);
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a = 207.19*g/mole;
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G4Element* elPb = new G4Element(name="Lead", symbol="Pb", z=82., a);
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//--- simple materials
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// Iron has a X0 = 1.7585 cm and lambda_I = 16.760 cm.
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density = 7.87*g/cm3;
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a = 55.85*g/mole;
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Iron = new G4Material(name="Iron", z=26., a, density);
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// Copper has a X0 = 1.4353 cm and lambda_I = 15.056 cm.
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density = 8.96*g/cm3;
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a = 63.55*g/mole;
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Copper = new G4Material(name="Copper", z=29., a, density);
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// Tungsten has a X0 = 0.35 cm and lambda_I = 9.5855 cm.
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density = 19.30*g/cm3;
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a = 183.85*g/mole;
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Tungsten = new G4Material(name="Tungsten", z=74., a, density);
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// Lead has a X0 = 0.56120 cm and lambda_I = 17.092 cm.
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density = 11.35*g/cm3;
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a = 207.19*g/mole;
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Lead = new G4Material(name="Lead", z=82., a, density);
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// Uranium has a X0 = 0.31662 cm and lambda_I = 10.501 cm.
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density = 18.95*g/cm3;
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a = 238.03*g/mole;
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Uranium = new G4Material(name="Uranium", z=92., a, density);
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// Liquid Argon has a X0 = 10.971 cm and lambda_I = 65.769 cm.
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density = 1.4*g/cm3;
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a = 39.95*g/mole;
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LiquidArgon = new G4Material(name="LiquidArgon", z=18., a, density);
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//--- mixtures
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density = 1.290*mg/cm3;
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G4Material* Air = new G4Material(name="Air", density, nel=2);
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Air->AddElement(elN, 0.7);
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Air->AddElement(elO, 0.3);
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// 4-May-2006 : We rename "Vacuum" as "G4vacuum" to avoid
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// problems with Flugg.
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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* G4vacuum = new G4Material(name="G4vacuum", density, nel=1,
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kStateGas, temperature, pressure);
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G4vacuum->AddMaterial(Air, fractionmass=1.);
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// Plastic scintillator tiles (used both in CMS hadron calorimeter
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// and ATLAS hadron barrel calorimeter):
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// X0 = 42.4 cm and lambda_I = 79.360 cm.
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density = 1.032*g/cm3;
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Polystyrene = new G4Material(name="Polystyrene", density, nel=2);
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Polystyrene->AddElement(elC, natoms=19);
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Polystyrene->AddElement(elH, natoms=21);
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// PbWO4 CMS crystals. It has a X0 = 0.89 cm and lambda_I = 22.4 cm.
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density = 8.28*g/cm3;
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PbWO4 = new G4Material(name="PbWO4", density, nel=3);
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PbWO4->AddElement(elPb, natoms=1);
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PbWO4->AddElement(elW, natoms=1);
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PbWO4->AddElement(elO, natoms=4);
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//------------------- volumes --------------------------
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// --- experimental hall (world volume)
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// beam line along z axis
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//***LOOKHERE***
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const G4double sizeExpHall = 4.0*m; // For normal calorimeter
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//const G4double sizeExpHall = 10.0*m; // For Scintillator calorimeter
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G4double expHall_x = sizeExpHall / 2.0; // half dimension along x
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G4double expHall_y = sizeExpHall / 2.0; // half dimension along y
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G4double expHall_z = sizeExpHall / 2.0; // half dimension along z
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G4Box* experimentalHall_box
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= new G4Box("expHall_box",expHall_x,expHall_y,expHall_z);
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experimentalHall_log = new G4LogicalVolume(experimentalHall_box, // solid
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G4vacuum, // material
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"expHall_log", // 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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experimentalHall_phys = new G4PVPlacement(0, // rotation
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G4ThreeVector(), // translation
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"expHall", // name
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experimentalHall_log, // 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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// --- Detector
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//***LOOKHERE***
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const G4double sizeCalo = 2.0*m; // For normal calorimeter
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//const G4double sizeCalo = 8.0*m; // For Scintillator calorimeter
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G4double xAbsorber = sizeCalo / 2.0; // half dimension along x
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G4double yAbsorber = sizeCalo / 2.0; // half dimension along y
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G4double zAbsorber = sizeCalo / 2.0; // half dimension along z
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G4Box* solidAbsorber = new G4Box("solidAbsorber", xAbsorber, yAbsorber, zAbsorber);
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logicAbsorber = new G4LogicalVolume(solidAbsorber, // solid
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theAbsorberMaterial, // material
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"logicAbsorber", // 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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physiAbsorber = new G4PVPlacement(0, // rotation
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G4ThreeVector(), // translation
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"physiAbsorber", // its name
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logicAbsorber, // logical volume
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experimentalHall_phys, // mother physical volume
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false, // boolean operation
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100); // copy number
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// --- Set default values ***LOOKHERE***
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theAbsorberMaterial = Iron;
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//theAbsorberMaterial = Copper;
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//theAbsorberMaterial = Tungsten;
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//theAbsorberMaterial = Lead;
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//theAbsorberMaterial = Uranium;
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//theAbsorberMaterial = PbWO4;
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//theAbsorberMaterial = Polystyrene;
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//theAbsorberMaterial = LiquidArgon;
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logicAbsorber->SetMaterial( theAbsorberMaterial );
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PrintParameters();
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return experimentalHall_phys;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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void DetectorConstruction::PrintParameters()
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{
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G4cout << G4endl << G4endl
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<< " ------ DetectorConstruction::PrintParameters() ------ " << G4endl
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<< " Absorber Material = ";
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if ( theAbsorberMaterial ) {
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G4cout << theAbsorberMaterial->GetName();
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} else {
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G4cout << " UNDEFINED ";
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}
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G4cout << G4endl << " -------------------------------------------------------- "
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<< G4endl << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.....
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