| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | // $Id: DetectorConstruction.cc,v 1.1 2006/11/22 14:51:29 gcosmo Exp $
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| 28 | // GEANT4 tag $Name: $
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| 29 | //
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| 30 | //
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| 31 | // --------------------------------------------------------------
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| 32 | // GEANT 4 - DetectorConstruction class
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| 33 | // --------------------------------------------------------------
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| 34 | //
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| 35 | // Author: Witold POKORSKI (Witold.Pokorski@cern.ch)
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| 36 | //
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| 37 | // --------------------------------------------------------------
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| 38 |
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| 39 | #include "DetectorConstruction.hh"
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| 40 | #include "G4Material.hh"
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| 41 | #include "G4Box.hh"
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| 42 | #include "G4LogicalVolume.hh"
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| 43 | #include "G4ThreeVector.hh"
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| 44 | #include "G4PVPlacement.hh"
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| 45 | #include "globals.hh"
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| 46 |
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| 47 | DetectorConstruction::DetectorConstruction() :
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| 48 | Iron(0), Copper(0), Tungsten(0), Lead(0), Uranium(0), PbWO4(0),
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| 49 | Polystyrene(0), LiquidArgon(0),
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| 50 | theAbsorberMaterial(0),
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| 51 | logicAbsorber(0), physiAbsorber(0) {}
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| 52 |
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| 53 |
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| 54 | DetectorConstruction::~DetectorConstruction() {}
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| 55 |
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| 56 |
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| 57 | G4VPhysicalVolume* DetectorConstruction::Construct()
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| 58 | {
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| 59 | //------------------- materials ------------------------
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| 60 |
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| 61 | G4double a; // atomic mass
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| 62 | G4double z; // atomic number
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| 63 | G4double density, pressure, temperature, fractionmass;
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| 64 | G4String name, symbol;
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| 65 | G4int nel, natoms;
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| 66 |
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| 67 | //--- elements
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| 68 |
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| 69 | a = 1.01*g/mole;
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| 70 | G4Element* elH = new G4Element(name="Hydrogen", symbol="H2", z=1., a);
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| 71 |
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| 72 | a = 12.01*g/mole;
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| 73 | G4Element* elC = new G4Element(name="Carbon", symbol="C", z=6., a);
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| 74 |
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| 75 | a = 14.01*g/mole;
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| 76 | G4Element* elN = new G4Element(name="Nitrogen", symbol="N2", z=7., a);
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| 77 |
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| 78 | a = 16.00*g/mole;
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| 79 | G4Element* elO = new G4Element(name="Oxygen", symbol="O2", z=8., a);
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| 80 |
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| 81 | a = 183.85*g/mole;
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| 82 | G4Element* elW = new G4Element(name="Tungsten", symbol="W", z=74., a);
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| 83 |
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| 84 | a = 207.19*g/mole;
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| 85 | G4Element* elPb = new G4Element(name="Lead", symbol="Pb", z=82., a);
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| 86 |
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| 87 | //--- simple materials
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| 88 |
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| 89 | // Iron has a X0 = 1.7585 cm and lambda_I = 16.760 cm.
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| 90 | density = 7.87*g/cm3;
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| 91 | a = 55.85*g/mole;
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| 92 | Iron = new G4Material(name="Iron", z=26., a, density);
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| 93 |
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| 94 | // Copper has a X0 = 1.4353 cm and lambda_I = 15.056 cm.
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| 95 | density = 8.96*g/cm3;
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| 96 | a = 63.55*g/mole;
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| 97 | Copper = new G4Material(name="Copper", z=29., a, density);
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| 98 |
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| 99 | // Tungsten has a X0 = 0.35 cm and lambda_I = 9.5855 cm.
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| 100 | density = 19.30*g/cm3;
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| 101 | a = 183.85*g/mole;
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| 102 | Tungsten = new G4Material(name="Tungsten", z=74., a, density);
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| 103 |
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| 104 | // Lead has a X0 = 0.56120 cm and lambda_I = 17.092 cm.
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| 105 | density = 11.35*g/cm3;
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| 106 | a = 207.19*g/mole;
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| 107 | Lead = new G4Material(name="Lead", z=82., a, density);
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| 108 |
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| 109 | // Uranium has a X0 = 0.31662 cm and lambda_I = 10.501 cm.
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| 110 | density = 18.95*g/cm3;
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| 111 | a = 238.03*g/mole;
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| 112 | Uranium = new G4Material(name="Uranium", z=92., a, density);
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| 113 |
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| 114 | // Liquid Argon has a X0 = 10.971 cm and lambda_I = 65.769 cm.
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| 115 | density = 1.4*g/cm3;
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| 116 | a = 39.95*g/mole;
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| 117 | LiquidArgon = new G4Material(name="LiquidArgon", z=18., a, density);
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| 118 |
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| 119 | //--- mixtures
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| 120 |
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| 121 | density = 1.290*mg/cm3;
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| 122 | G4Material* Air = new G4Material(name="Air", density, nel=2);
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| 123 | Air->AddElement(elN, 0.7);
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| 124 | Air->AddElement(elO, 0.3);
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| 125 |
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| 126 | // 4-May-2006 : We rename "Vacuum" as "G4vacuum" to avoid
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| 127 | // problems with Flugg.
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| 128 | density = 1.e-5*g/cm3;
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| 129 | pressure = 2.e-2*bar;
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| 130 | temperature = STP_Temperature; // From PhysicalConstants.h .
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| 131 | G4Material* G4vacuum = new G4Material(name="G4vacuum", density, nel=1,
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| 132 | kStateGas, temperature, pressure);
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| 133 | G4vacuum->AddMaterial(Air, fractionmass=1.);
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| 134 |
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| 135 | // Plastic scintillator tiles (used both in CMS hadron calorimeter
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| 136 | // and ATLAS hadron barrel calorimeter):
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| 137 | // X0 = 42.4 cm and lambda_I = 79.360 cm.
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| 138 | density = 1.032*g/cm3;
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| 139 | Polystyrene = new G4Material(name="Polystyrene", density, nel=2);
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| 140 | Polystyrene->AddElement(elC, natoms=19);
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| 141 | Polystyrene->AddElement(elH, natoms=21);
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| 142 |
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| 143 | // PbWO4 CMS crystals. It has a X0 = 0.89 cm and lambda_I = 22.4 cm.
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| 144 | density = 8.28*g/cm3;
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| 145 | PbWO4 = new G4Material(name="PbWO4", density, nel=3);
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| 146 | PbWO4->AddElement(elPb, natoms=1);
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| 147 | PbWO4->AddElement(elW, natoms=1);
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| 148 | PbWO4->AddElement(elO, natoms=4);
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| 149 |
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| 150 | //------------------- volumes --------------------------
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| 151 |
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| 152 | // --- experimental hall (world volume)
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| 153 | // beam line along z axis
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| 154 |
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| 155 | //***LOOKHERE***
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| 156 | const G4double sizeExpHall = 4.0*m; // For normal calorimeter
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| 157 | //const G4double sizeExpHall = 10.0*m; // For Scintillator calorimeter
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| 158 |
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| 159 | G4double expHall_x = sizeExpHall / 2.0; // half dimension along x
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| 160 | G4double expHall_y = sizeExpHall / 2.0; // half dimension along y
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| 161 | G4double expHall_z = sizeExpHall / 2.0; // half dimension along z
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| 162 |
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| 163 | G4Box* experimentalHall_box
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| 164 | = new G4Box("expHall_box",expHall_x,expHall_y,expHall_z);
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| 165 |
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| 166 | experimentalHall_log = new G4LogicalVolume(experimentalHall_box, // solid
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| 167 | G4vacuum, // material
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| 168 | "expHall_log", // name
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| 169 | 0, // field manager
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| 170 | 0, // sensitive detector
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| 171 | 0); // user limits
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| 172 |
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| 173 | experimentalHall_phys = new G4PVPlacement(0, // rotation
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| 174 | G4ThreeVector(), // translation
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| 175 | "expHall", // name
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| 176 | experimentalHall_log, // logical volume
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| 177 | 0, // mother physical volume
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| 178 | false, // boolean operation
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| 179 | 0); // copy number
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| 180 |
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| 181 | // --- Detector
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| 182 |
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| 183 | //***LOOKHERE***
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| 184 | const G4double sizeCalo = 2.0*m; // For normal calorimeter
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| 185 | //const G4double sizeCalo = 8.0*m; // For Scintillator calorimeter
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| 186 |
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| 187 | G4double xAbsorber = sizeCalo / 2.0; // half dimension along x
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| 188 | G4double yAbsorber = sizeCalo / 2.0; // half dimension along y
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| 189 | G4double zAbsorber = sizeCalo / 2.0; // half dimension along z
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| 190 |
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| 191 | G4Box* solidAbsorber = new G4Box("solidAbsorber", xAbsorber, yAbsorber, zAbsorber);
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| 192 |
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| 193 | logicAbsorber = new G4LogicalVolume(solidAbsorber, // solid
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| 194 | theAbsorberMaterial, // material
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| 195 | "logicAbsorber", // name
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| 196 | 0, // field manager
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| 197 | 0, // sensitive detector
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| 198 | 0); // user limits
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| 199 |
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| 200 | physiAbsorber = new G4PVPlacement(0, // rotation
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| 201 | G4ThreeVector(), // translation
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| 202 | "physiAbsorber", // its name
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| 203 | logicAbsorber, // logical volume
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| 204 | experimentalHall_phys, // mother physical volume
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| 205 | false, // boolean operation
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| 206 | 100); // copy number
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| 207 |
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| 208 | // --- Set default values ***LOOKHERE***
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| 209 | theAbsorberMaterial = Iron;
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| 210 | //theAbsorberMaterial = Copper;
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| 211 | //theAbsorberMaterial = Tungsten;
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| 212 | //theAbsorberMaterial = Lead;
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| 213 | //theAbsorberMaterial = Uranium;
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| 214 | //theAbsorberMaterial = PbWO4;
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| 215 | //theAbsorberMaterial = Polystyrene;
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| 216 | //theAbsorberMaterial = LiquidArgon;
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| 217 |
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| 218 | logicAbsorber->SetMaterial( theAbsorberMaterial );
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| 219 |
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| 220 | PrintParameters();
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| 221 |
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| 222 | return experimentalHall_phys;
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| 223 | }
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| 224 |
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| 225 |
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| 226 | void DetectorConstruction::PrintParameters()
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| 227 | {
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| 228 | G4cout << G4endl << G4endl
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| 229 | << " ------ DetectorConstruction::PrintParameters() ------ " << G4endl
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| 230 | << " Absorber Material = ";
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| 231 | if ( theAbsorberMaterial ) {
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| 232 | G4cout << theAbsorberMaterial->GetName();
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| 233 | } else {
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| 234 | G4cout << " UNDEFINED ";
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| 235 | }
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| 236 | G4cout << G4endl << " -------------------------------------------------------- "
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| 237 | << G4endl << G4endl;
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| 238 | }
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