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 | #include "LXeDetectorConstruction.hh" |
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27 | #include "LXePMTSD.hh" |
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28 | #include "LXeScintSD.hh" |
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29 | #include "LXeDetectorMessenger.hh" |
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30 | #include "LXeMainVolume.hh" |
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31 | #include "LXeWLSSlab.hh" |
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32 | |
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33 | #include "G4SDManager.hh" |
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34 | #include "G4RunManager.hh" |
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35 | #include "G4LogicalBorderSurface.hh" |
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36 | #include "G4LogicalSkinSurface.hh" |
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37 | #include "G4OpticalSurface.hh" |
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38 | #include "G4MaterialTable.hh" |
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39 | #include "G4VisAttributes.hh" |
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40 | #include "G4Material.hh" |
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41 | #include "G4Box.hh" |
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42 | #include "G4Tubs.hh" |
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43 | #include "G4Sphere.hh" |
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44 | #include "G4LogicalVolume.hh" |
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45 | #include "G4ThreeVector.hh" |
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46 | #include "G4PVPlacement.hh" |
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47 | #include "globals.hh" |
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48 | #include "G4SolidStore.hh" |
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49 | #include "G4LogicalVolumeStore.hh" |
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50 | #include "G4PhysicalVolumeStore.hh" |
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51 | #include "G4GeometryManager.hh" |
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52 | #include "G4UImanager.hh" |
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53 | |
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54 | G4bool LXeDetectorConstruction::sphereOn = true; |
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55 | |
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56 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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57 | LXeDetectorConstruction::LXeDetectorConstruction() |
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58 | : LXe_mt(NULL), MPTPStyrene(NULL) |
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59 | { |
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60 | SetDefaults(); |
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61 | detectorMessenger = new LXeDetectorMessenger(this); |
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62 | } |
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63 | |
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64 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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65 | LXeDetectorConstruction::~LXeDetectorConstruction(){ |
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66 | } |
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67 | |
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68 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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69 | void LXeDetectorConstruction::DefineMaterials(){ |
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70 | G4double a; // atomic mass |
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71 | G4double z; // atomic number |
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72 | G4double density; |
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73 | |
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74 | G4int polyPMMA = 1; |
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75 | G4int nC_PMMA = 3+2*polyPMMA; |
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76 | G4int nH_PMMA = 6+2*polyPMMA; |
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77 | |
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78 | G4int polyeth = 1; |
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79 | G4int nC_eth = 2*polyeth; |
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80 | G4int nH_eth = 4*polyeth; |
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81 | |
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82 | //***Elements |
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83 | H = new G4Element("H", "H", z=1., a=1.01*g/mole); |
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84 | C = new G4Element("C", "C", z=6., a=12.01*g/mole); |
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85 | N = new G4Element("N", "N", z=7., a= 14.01*g/mole); |
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86 | O = new G4Element("O" , "O", z=8., a= 16.00*g/mole); |
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87 | |
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88 | //***Materials |
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89 | //Liquid Xenon |
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90 | LXe = new G4Material("LXe",z=54.,a=131.29*g/mole,density=3.020*g/cm3); |
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91 | //Aluminum |
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92 | Al = new G4Material("Al",z=13.,a=26.98*g/mole,density=2.7*g/cm3); |
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93 | //Vacuum |
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94 | Vacuum = new G4Material("Vacuum",z=1.,a=1.01*g/mole, |
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95 | density=universe_mean_density,kStateGas,0.1*kelvin, |
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96 | 1.e-19*pascal); |
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97 | //Air |
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98 | Air = new G4Material("Air", density= 1.29*mg/cm3, 2); |
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99 | Air->AddElement(N, 70*perCent); |
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100 | Air->AddElement(O, 30*perCent); |
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101 | //Glass |
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102 | Glass = new G4Material("Glass", density=1.032*g/cm3,2); |
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103 | Glass->AddElement(C,91.533*perCent); |
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104 | Glass->AddElement(H,8.467*perCent); |
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105 | //Polystyrene |
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106 | Pstyrene = new G4Material("Polystyrene", density= 1.03*g/cm3, 2); |
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107 | Pstyrene->AddElement(C, 8); |
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108 | Pstyrene->AddElement(H, 8); |
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109 | //Fiber(PMMA) |
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110 | PMMA = new G4Material("PMMA", density=1190*kg/m3,3); |
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111 | PMMA->AddElement(H,nH_PMMA); |
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112 | PMMA->AddElement(C,nC_PMMA); |
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113 | PMMA->AddElement(O,2); |
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114 | //Cladding(polyethylene) |
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115 | Pethylene = new G4Material("Pethylene", density=1200*kg/m3,2); |
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116 | Pethylene->AddElement(H,nH_eth); |
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117 | Pethylene->AddElement(C,nC_eth); |
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118 | //Double cladding(flourinated polyethylene) |
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119 | fPethylene = new G4Material("fPethylene", density=1400*kg/m3,2); |
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120 | fPethylene->AddElement(H,nH_eth); |
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121 | fPethylene->AddElement(C,nC_eth); |
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122 | |
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123 | //***Material properties tables |
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124 | |
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125 | const G4int LXe_NUMENTRIES = 3; |
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126 | G4double LXe_Energy[LXe_NUMENTRIES] = { 7.0*eV , 7.07*eV, 7.14*eV }; |
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127 | |
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128 | G4double LXe_SCINT[LXe_NUMENTRIES] = { 0.1, 1.0, 0.1 }; |
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129 | G4double LXe_RIND[LXe_NUMENTRIES] = { 1.59 , 1.57, 1.54 }; |
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130 | G4double LXe_ABSL[LXe_NUMENTRIES] = { 35.*cm, 35.*cm, 35.*cm}; |
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131 | LXe_mt = new G4MaterialPropertiesTable(); |
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132 | LXe_mt->AddProperty("FASTCOMPONENT", LXe_Energy, LXe_SCINT, LXe_NUMENTRIES); |
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133 | LXe_mt->AddProperty("SLOWCOMPONENT", LXe_Energy, LXe_SCINT, LXe_NUMENTRIES); |
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134 | LXe_mt->AddProperty("RINDEX", LXe_Energy, LXe_RIND, LXe_NUMENTRIES); |
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135 | LXe_mt->AddProperty("ABSLENGTH", LXe_Energy, LXe_ABSL, LXe_NUMENTRIES); |
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136 | LXe_mt->AddConstProperty("SCINTILLATIONYIELD",12000./MeV); |
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137 | LXe_mt->AddConstProperty("RESOLUTIONSCALE",1.0); |
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138 | LXe_mt->AddConstProperty("FASTTIMECONSTANT",20.*ns); |
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139 | LXe_mt->AddConstProperty("SLOWTIMECONSTANT",45.*ns); |
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140 | LXe_mt->AddConstProperty("YIELDRATIO",1.0); |
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141 | LXe->SetMaterialPropertiesTable(LXe_mt); |
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142 | |
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143 | // Set the Birks Constant for the LXe scintillator |
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144 | |
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145 | LXe->GetIonisation()->SetBirksConstant(0.126*mm/MeV); |
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146 | |
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147 | G4double Glass_RIND[LXe_NUMENTRIES]={1.49,1.49,1.49}; |
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148 | G4double Glass_AbsLength[LXe_NUMENTRIES]={420.*cm,420.*cm,420.*cm}; |
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149 | G4MaterialPropertiesTable *Glass_mt = new G4MaterialPropertiesTable(); |
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150 | Glass_mt->AddProperty("ABSLENGTH",LXe_Energy,Glass_AbsLength,LXe_NUMENTRIES); |
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151 | Glass_mt->AddProperty("RINDEX",LXe_Energy,Glass_RIND,LXe_NUMENTRIES); |
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152 | Glass->SetMaterialPropertiesTable(Glass_mt); |
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153 | |
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154 | G4double Vacuum_Energy[LXe_NUMENTRIES]={2.0*eV,7.0*eV,7.14*eV}; |
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155 | G4double Vacuum_RIND[LXe_NUMENTRIES]={1.,1.,1.}; |
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156 | G4MaterialPropertiesTable *Vacuum_mt = new G4MaterialPropertiesTable(); |
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157 | Vacuum_mt->AddProperty("RINDEX", Vacuum_Energy, Vacuum_RIND,LXe_NUMENTRIES); |
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158 | Vacuum->SetMaterialPropertiesTable(Vacuum_mt); |
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159 | Air->SetMaterialPropertiesTable(Vacuum_mt);//Give air the same rindex |
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160 | |
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161 | const G4int WLS_NUMENTRIES = 4; |
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162 | G4double WLS_Energy[] = {2.00*eV,2.87*eV,2.90*eV,3.47*eV}; |
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163 | |
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164 | G4double RIndexPstyrene[WLS_NUMENTRIES]={ 1.5, 1.5, 1.5, 1.5}; |
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165 | G4double Absorption1[WLS_NUMENTRIES]={2.*cm, 2.*cm, 2.*cm, 2.*cm}; |
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166 | G4double ScintilFast[WLS_NUMENTRIES]={0.00, 0.00, 1.00, 1.00}; |
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167 | MPTPStyrene = new G4MaterialPropertiesTable(); |
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168 | MPTPStyrene->AddProperty("RINDEX",WLS_Energy,RIndexPstyrene,WLS_NUMENTRIES); |
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169 | MPTPStyrene->AddProperty("ABSLENGTH",WLS_Energy,Absorption1,WLS_NUMENTRIES); |
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170 | MPTPStyrene->AddProperty("FASTCOMPONENT",WLS_Energy, ScintilFast, |
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171 | WLS_NUMENTRIES); |
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172 | MPTPStyrene->AddConstProperty("SCINTILLATIONYIELD",10./keV); |
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173 | MPTPStyrene->AddConstProperty("RESOLUTIONSCALE",1.0); |
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174 | MPTPStyrene->AddConstProperty("FASTTIMECONSTANT", 10.*ns); |
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175 | Pstyrene->SetMaterialPropertiesTable(MPTPStyrene); |
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176 | |
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177 | // Set the Birks Constant for the Polystyrene scintillator |
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178 | |
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179 | Pstyrene->GetIonisation()->SetBirksConstant(0.126*mm/MeV); |
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180 | |
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181 | G4double RefractiveIndexFiber[WLS_NUMENTRIES]={ 1.60, 1.60, 1.60, 1.60}; |
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182 | G4double AbsFiber[WLS_NUMENTRIES]={9.00*m,9.00*m,0.1*mm,0.1*mm}; |
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183 | G4double EmissionFib[WLS_NUMENTRIES]={1.0, 1.0, 0.0, 0.0}; |
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184 | G4MaterialPropertiesTable* MPTFiber = new G4MaterialPropertiesTable(); |
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185 | MPTFiber->AddProperty("RINDEX",WLS_Energy,RefractiveIndexFiber, |
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186 | WLS_NUMENTRIES); |
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187 | MPTFiber->AddProperty("WLSABSLENGTH",WLS_Energy,AbsFiber,WLS_NUMENTRIES); |
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188 | MPTFiber->AddProperty("WLSCOMPONENT",WLS_Energy,EmissionFib,WLS_NUMENTRIES); |
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189 | MPTFiber->AddConstProperty("WLSTIMECONSTANT", 0.5*ns); |
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190 | PMMA->SetMaterialPropertiesTable(MPTFiber); |
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191 | |
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192 | G4double RefractiveIndexClad1[WLS_NUMENTRIES]={ 1.49, 1.49, 1.49, 1.49}; |
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193 | G4MaterialPropertiesTable* MPTClad1 = new G4MaterialPropertiesTable(); |
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194 | MPTClad1->AddProperty("RINDEX",WLS_Energy,RefractiveIndexClad1, |
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195 | WLS_NUMENTRIES); |
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196 | MPTClad1->AddProperty("ABSLENGTH",WLS_Energy,AbsFiber,WLS_NUMENTRIES); |
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197 | Pethylene->SetMaterialPropertiesTable(MPTClad1); |
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198 | |
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199 | G4double RefractiveIndexClad2[WLS_NUMENTRIES]={ 1.42, 1.42, 1.42, 1.42}; |
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200 | G4MaterialPropertiesTable* MPTClad2 = new G4MaterialPropertiesTable(); |
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201 | MPTClad2->AddProperty("RINDEX",WLS_Energy,RefractiveIndexClad2, |
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202 | WLS_NUMENTRIES); |
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203 | MPTClad2->AddProperty("ABSLENGTH",WLS_Energy,AbsFiber,WLS_NUMENTRIES); |
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204 | fPethylene->SetMaterialPropertiesTable(MPTClad2); |
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205 | } |
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206 | |
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207 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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208 | G4VPhysicalVolume* LXeDetectorConstruction::Construct(){ |
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209 | DefineMaterials(); |
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210 | return ConstructDetector(); |
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211 | } |
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212 | |
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213 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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214 | G4VPhysicalVolume* LXeDetectorConstruction::ConstructDetector() |
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215 | { |
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216 | //The experimental hall walls are all 1m away from housing walls |
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217 | G4double expHall_x = scint_x+d_mtl+1.*m; |
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218 | G4double expHall_y = scint_y+d_mtl+1.*m; |
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219 | G4double expHall_z = scint_z+d_mtl+1.*m; |
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220 | |
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221 | //Create experimental hall |
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222 | experimentalHall_box |
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223 | = new G4Box("expHall_box",expHall_x,expHall_y,expHall_z); |
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224 | experimentalHall_log = new G4LogicalVolume(experimentalHall_box, |
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225 | Vacuum,"expHall_log",0,0,0); |
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226 | experimentalHall_phys = new G4PVPlacement(0,G4ThreeVector(), |
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227 | experimentalHall_log,"expHall",0,false,0); |
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228 | |
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229 | experimentalHall_log->SetVisAttributes(G4VisAttributes::Invisible); |
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230 | |
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231 | //Place the main volume |
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232 | if(mainVolume){ |
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233 | new LXeMainVolume(0,G4ThreeVector(),experimentalHall_log,false,0,this); |
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234 | } |
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235 | |
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236 | //Place the WLS slab |
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237 | if(WLSslab){ |
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238 | G4VPhysicalVolume* slab = new LXeWLSSlab(0,G4ThreeVector(0.,0., |
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239 | -scint_z/2.-slab_z-1.*cm), |
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240 | experimentalHall_log,false,0, |
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241 | this); |
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242 | |
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243 | //Surface properties for the WLS slab |
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244 | G4OpticalSurface* ScintWrap = new G4OpticalSurface("ScintWrap"); |
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245 | |
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246 | new G4LogicalBorderSurface("ScintWrap", slab, |
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247 | experimentalHall_phys, |
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248 | ScintWrap); |
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249 | |
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250 | ScintWrap->SetType(dielectric_metal); |
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251 | ScintWrap->SetFinish(polished); |
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252 | ScintWrap->SetModel(glisur); |
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253 | |
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254 | const G4int NUM = 2; |
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255 | |
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256 | G4double pp[NUM] = {2.0*eV, 3.5*eV}; |
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257 | G4double reflectivity[NUM] = {1., 1.}; |
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258 | G4double efficiency[NUM] = {0.0, 0.0}; |
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259 | |
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260 | G4MaterialPropertiesTable* ScintWrapProperty |
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261 | = new G4MaterialPropertiesTable(); |
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262 | |
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263 | ScintWrapProperty->AddProperty("REFLECTIVITY",pp,reflectivity,NUM); |
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264 | ScintWrapProperty->AddProperty("EFFICIENCY",pp,efficiency,NUM); |
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265 | ScintWrap->SetMaterialPropertiesTable(ScintWrapProperty); |
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266 | } |
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267 | |
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268 | return experimentalHall_phys; |
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269 | } |
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270 | |
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271 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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272 | void LXeDetectorConstruction::SetDimensions(G4ThreeVector dims){ |
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273 | this->scint_x=dims[0]; |
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274 | this->scint_y=dims[1]; |
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275 | this->scint_z=dims[2]; |
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276 | updated=true; |
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277 | } |
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278 | |
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279 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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280 | void LXeDetectorConstruction::SetHousingThickness(G4double d_mtl){ |
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281 | this->d_mtl=d_mtl; |
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282 | updated=true; |
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283 | } |
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284 | |
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285 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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286 | void LXeDetectorConstruction::SetNX(G4int nx){ |
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287 | this->nx=nx; |
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288 | updated=true; |
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289 | } |
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290 | |
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291 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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292 | void LXeDetectorConstruction::SetNY(G4int ny){ |
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293 | this->ny=ny; |
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294 | updated=true; |
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295 | } |
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296 | |
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297 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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298 | void LXeDetectorConstruction::SetNZ(G4int nz){ |
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299 | this->nz=nz; |
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300 | updated=true; |
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301 | } |
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302 | |
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303 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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304 | void LXeDetectorConstruction::SetPMTRadius(G4double outerRadius_pmt){ |
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305 | this->outerRadius_pmt=outerRadius_pmt; |
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306 | updated=true; |
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307 | } |
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308 | |
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309 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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310 | void LXeDetectorConstruction::SetDefaults(){ |
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311 | //Resets to default values |
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312 | d_mtl=0.0635*cm; |
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313 | |
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314 | scint_x = 17.8*cm; |
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315 | scint_y = 17.8*cm; |
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316 | scint_z = 22.6*cm; |
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317 | |
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318 | nx = 2; |
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319 | ny = 2; |
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320 | nz = 3; |
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321 | |
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322 | outerRadius_pmt = 2.3*cm; |
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323 | |
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324 | sphereOn = true; |
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325 | refl=1.0; |
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326 | |
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327 | nfibers=15; |
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328 | WLSslab=false; |
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329 | mainVolume=true; |
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330 | slab_z=2.5*mm; |
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331 | |
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332 | G4UImanager::GetUIpointer() |
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333 | ->ApplyCommand("/LXe/detector/scintYieldFactor 1."); |
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334 | |
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335 | if(LXe_mt)LXe_mt->AddConstProperty("SCINTILLATIONYIELD",12000./MeV); |
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336 | if(MPTPStyrene)MPTPStyrene->AddConstProperty("SCINTILLATIONYIELD",10./keV); |
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337 | |
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338 | updated=true; |
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339 | } |
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340 | |
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341 | |
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342 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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343 | void LXeDetectorConstruction::UpdateGeometry(){ |
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344 | |
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345 | // clean-up previous geometry |
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346 | G4GeometryManager::GetInstance()->OpenGeometry(); |
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347 | |
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348 | G4PhysicalVolumeStore::GetInstance()->Clean(); |
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349 | G4LogicalVolumeStore::GetInstance()->Clean(); |
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350 | G4SolidStore::GetInstance()->Clean(); |
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351 | G4LogicalSkinSurface::CleanSurfaceTable(); |
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352 | G4LogicalBorderSurface::CleanSurfaceTable(); |
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353 | G4SurfaceProperty::CleanSurfacePropertyTable(); |
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354 | |
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355 | //define new one |
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356 | G4RunManager::GetRunManager()->DefineWorldVolume(ConstructDetector()); |
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357 | G4RunManager::GetRunManager()->GeometryHasBeenModified(); |
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358 | |
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359 | updated=false; |
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360 | } |
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361 | |
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362 | void LXeDetectorConstruction::SetMainScintYield(G4double y){ |
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363 | LXe_mt->AddConstProperty("SCINTILLATIONYIELD",y/MeV); |
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364 | } |
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365 | |
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366 | void LXeDetectorConstruction::SetWLSScintYield(G4double y){ |
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367 | MPTPStyrene->AddConstProperty("SCINTILLATIONYIELD",y/MeV); |
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368 | } |
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369 | |
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370 | |
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371 | |
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372 | |
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373 | |
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