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 "LXeMainVolume.hh" |
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27 | #include "globals.hh" |
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28 | #include "G4SDManager.hh" |
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29 | #include "G4LogicalSkinSurface.hh" |
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30 | #include "G4LogicalBorderSurface.hh" |
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31 | #include "LXePMTSD.hh" |
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32 | #include "LXeScintSD.hh" |
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33 | |
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34 | LXeScintSD* LXeMainVolume::scint_SD; |
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35 | LXePMTSD* LXeMainVolume::pmt_SD; |
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36 | |
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37 | G4LogicalVolume* LXeMainVolume::housing_log=NULL; |
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38 | |
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39 | LXeMainVolume::LXeMainVolume(G4RotationMatrix *pRot, |
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40 | const G4ThreeVector &tlate, |
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41 | G4LogicalVolume *pMotherLogical, |
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42 | G4bool pMany, |
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43 | G4int pCopyNo, |
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44 | LXeDetectorConstruction* c) |
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45 | //Pass info to the G4PVPlacement constructor |
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46 | :G4PVPlacement(pRot,tlate, |
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47 | //Temp logical volume must be created here |
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48 | new G4LogicalVolume(new G4Box("temp",1,1,1), |
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49 | G4Material::GetMaterial("Vacuum"), |
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50 | "temp",0,0,0), |
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51 | "housing",pMotherLogical,pMany,pCopyNo),constructor(c) |
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52 | { |
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53 | CopyValues(); |
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54 | |
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55 | if(!housing_log || updated){ |
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56 | |
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57 | G4double housing_x=scint_x+d_mtl; |
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58 | G4double housing_y=scint_y+d_mtl; |
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59 | G4double housing_z=scint_z+d_mtl; |
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60 | |
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61 | //*************************** housing and scintillator |
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62 | scint_box = new G4Box("scint_box",scint_x/2.,scint_y/2.,scint_z/2.); |
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63 | housing_box = new G4Box("housing_box",housing_x/2.,housing_y/2., |
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64 | housing_z/2.); |
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65 | |
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66 | scint_log = new G4LogicalVolume(scint_box,G4Material::GetMaterial("LXe"), |
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67 | "scint_log",0,0,0); |
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68 | housing_log = new G4LogicalVolume(housing_box, |
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69 | G4Material::GetMaterial("Al"), |
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70 | "housing_log",0,0,0); |
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71 | |
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72 | |
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73 | scint_phys = new G4PVPlacement(0,G4ThreeVector(),scint_log,"scintillator", |
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74 | housing_log,false,0); |
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75 | |
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76 | //*************** Miscellaneous sphere to demonstrate skin surfaces |
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77 | sphere = new G4Sphere("sphere",0.*mm,2.*cm,0.*deg,360.*deg,0.*deg, |
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78 | 360.*deg); |
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79 | sphere_log = new G4LogicalVolume(sphere,G4Material::GetMaterial("Al"), |
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80 | "sphere_log"); |
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81 | if(sphereOn) |
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82 | sphere_phys = new G4PVPlacement(0,G4ThreeVector(5.*cm,5.*cm,5.*cm), |
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83 | sphere_log,"sphere",scint_log,false,0); |
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84 | |
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85 | |
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86 | //****************** Build PMTs |
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87 | G4double innerRadius_pmt = 0.*cm; |
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88 | G4double height_pmt = d_mtl/2.; |
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89 | G4double startAngle_pmt = 0.*deg; |
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90 | G4double spanningAngle_pmt = 360.*deg; |
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91 | |
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92 | pmt = new G4Tubs("pmt_tube",innerRadius_pmt,outerRadius_pmt, |
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93 | height_pmt,startAngle_pmt,spanningAngle_pmt); |
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94 | |
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95 | //the "photocathode" is a metal slab at the back of the glass that |
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96 | //is only a very rough approximation of the real thing since it only |
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97 | //absorbs or detects the photons based on the efficiency set below |
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98 | photocath = new G4Tubs("photocath_tube",innerRadius_pmt,outerRadius_pmt, |
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99 | height_pmt/2,startAngle_pmt,spanningAngle_pmt); |
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100 | |
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101 | pmt_log = new G4LogicalVolume(pmt,G4Material::GetMaterial("Glass"), |
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102 | "pmt_log"); |
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103 | photocath_log = new G4LogicalVolume(photocath, |
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104 | G4Material::GetMaterial("Al"), |
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105 | "photocath_log"); |
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106 | |
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107 | photocath_phys = new G4PVPlacement(0,G4ThreeVector(0,0,-height_pmt/2), |
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108 | photocath_log,"photocath", |
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109 | pmt_log,false,0); |
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110 | |
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111 | |
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112 | |
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113 | //***********Arrange pmts around the outside of housing********** |
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114 | //---pmt sensitive detector |
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115 | G4SDManager* SDman = G4SDManager::GetSDMpointer(); |
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116 | |
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117 | if(!pmt_SD){ |
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118 | pmt_SD = new LXePMTSD("/LXeDet/pmtSD"); |
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119 | SDman->AddNewDetector(pmt_SD); |
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120 | //Created here so it exists as pmts are being placed |
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121 | } |
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122 | pmt_SD->InitPMTs((nx*ny+nx*nz+ny*nz)*2); //let pmtSD know # of pmts |
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123 | //------- |
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124 | |
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125 | G4double dx = scint_x/nx; |
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126 | G4double dy = scint_y/ny; |
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127 | G4double dz = scint_z/nz; |
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128 | |
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129 | G4double x,y,z; |
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130 | G4double xmin = -scint_x/2. - dx/2.; |
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131 | G4double ymin = -scint_y/2. - dy/2.; |
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132 | G4double zmin = -scint_z/2. - dz/2.; |
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133 | G4int k=0; |
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134 | |
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135 | z = -scint_z/2. - height_pmt; //front |
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136 | PlacePMTs(pmt_log,0,x,y,dx,dy,xmin,ymin,nx,ny,x,y,z,k,pmt_SD); |
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137 | G4RotationMatrix* rm_z = new G4RotationMatrix(); |
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138 | rm_z->rotateY(180*deg); |
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139 | z = scint_z/2. + height_pmt; //back |
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140 | PlacePMTs(pmt_log,rm_z,x,y,dx,dy,xmin,ymin,nx,ny,x,y,z,k,pmt_SD); |
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141 | |
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142 | G4RotationMatrix* rm_y1 = new G4RotationMatrix(); |
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143 | rm_y1->rotateY(-90*deg); |
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144 | x = -scint_x/2. - height_pmt; //left |
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145 | PlacePMTs(pmt_log,rm_y1,y,z,dy,dz,ymin,zmin,ny,nz,x,y,z,k,pmt_SD); |
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146 | G4RotationMatrix* rm_y2 = new G4RotationMatrix(); |
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147 | rm_y2->rotateY(90*deg); |
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148 | x = scint_x/2. + height_pmt; //right |
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149 | PlacePMTs(pmt_log,rm_y2,y,z,dy,dz,ymin,zmin,ny,nz,x,y,z,k,pmt_SD); |
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150 | |
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151 | G4RotationMatrix* rm_x1 = new G4RotationMatrix(); |
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152 | rm_x1->rotateX(90*deg); |
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153 | y = -scint_y/2. - height_pmt; //bottom |
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154 | PlacePMTs(pmt_log,rm_x1,x,z,dx,dz,xmin,zmin,nx,nz,x,y,z,k,pmt_SD); |
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155 | G4RotationMatrix* rm_x2 = new G4RotationMatrix(); |
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156 | rm_x2->rotateX(-90*deg); |
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157 | y = scint_y/2. + height_pmt; //top |
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158 | PlacePMTs(pmt_log,rm_x2,x,z,dx,dz,xmin,zmin,nx,nz,x,y,z,k,pmt_SD); |
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159 | |
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160 | //**********Setup Sensitive Detectors*************** |
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161 | if(!scint_SD){//determine if it has already been created |
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162 | scint_SD = new LXeScintSD("/LXeDet/scintSD"); |
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163 | SDman->AddNewDetector(scint_SD); |
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164 | } |
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165 | scint_log->SetSensitiveDetector(scint_SD); |
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166 | |
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167 | //sensitive detector is not actually on the photocathode. |
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168 | //processHits gets done manually by the stepping action. |
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169 | //It is used to detect when photons hit and get absorbed&detected at the |
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170 | //boundary to the photocathode (which doesnt get done by attaching it to a |
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171 | //logical volume. |
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172 | //It does however need to be attached to something or else it doesnt get |
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173 | //reset at the begining of events |
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174 | photocath_log->SetSensitiveDetector(pmt_SD); |
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175 | |
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176 | VisAttributes(); |
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177 | SurfaceProperties(); |
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178 | } |
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179 | |
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180 | SetLogicalVolume(housing_log); |
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181 | } |
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182 | |
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183 | void LXeMainVolume::CopyValues(){ |
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184 | updated=constructor->GetUpdated(); |
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185 | |
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186 | scint_x=constructor->GetScintX(); |
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187 | scint_y=constructor->GetScintY(); |
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188 | scint_z=constructor->GetScintZ(); |
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189 | d_mtl=constructor->GetHousingThickness(); |
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190 | nx=constructor->GetNX(); |
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191 | ny=constructor->GetNY(); |
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192 | nz=constructor->GetNZ(); |
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193 | outerRadius_pmt=constructor->GetPMTRadius(); |
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194 | sphereOn=constructor->GetSphereOn(); |
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195 | refl=constructor->GetHousingReflectivity(); |
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196 | } |
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197 | |
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198 | //_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ |
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199 | void LXeMainVolume::PlacePMTs(G4LogicalVolume* pmt_log, |
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200 | G4RotationMatrix *rot, |
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201 | G4double &a, G4double &b, G4double da, |
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202 | G4double db, G4double amin, |
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203 | G4double bmin, G4int na, G4int nb, |
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204 | G4double &x, G4double &y, G4double &z, |
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205 | G4int &k,LXePMTSD* sd){ |
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206 | /*PlacePMTs : a different way to parameterize placement that does not depend on |
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207 | calculating the position from the copy number |
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208 | |
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209 | pmt_log = logical volume for pmts to be placed |
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210 | rot = rotation matrix to apply |
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211 | a,b = coordinates to vary(ie. if varying in the xy plane then pass x,y) |
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212 | da,db = value to increment a,b by |
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213 | amin,bmin = start values for a,b |
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214 | na,nb = number of repitions in a and b |
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215 | x,y,z = just pass x,y, and z by reference (the same ones passed for a,b) |
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216 | k = copy number to start with |
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217 | sd = sensitive detector for pmts |
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218 | */ |
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219 | a=amin; |
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220 | for(G4int j=1;j<=na;j++){ |
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221 | a+=da; |
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222 | b=bmin; |
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223 | for(G4int i=1;i<=nb;i++){ |
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224 | b+=db; |
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225 | new G4PVPlacement(rot,G4ThreeVector(x,y,z),pmt_log,"pmt", |
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226 | housing_log,false,k); |
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227 | sd->SetPMTPos(k,x,y,z); |
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228 | k++; |
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229 | } |
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230 | } |
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231 | } |
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232 | |
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233 | void LXeMainVolume::VisAttributes(){ |
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234 | G4VisAttributes* housing_va = new G4VisAttributes(G4Colour(0.8,0.8,0.8)); |
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235 | housing_log->SetVisAttributes(housing_va); |
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236 | |
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237 | G4VisAttributes* sphere_va = new G4VisAttributes(); |
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238 | sphere_va->SetForceSolid(true); |
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239 | sphere_log->SetVisAttributes(sphere_va); |
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240 | } |
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241 | |
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242 | void LXeMainVolume::SurfaceProperties(){ |
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243 | const G4int num = 2; |
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244 | G4double Ephoton[num] = {7.0*eV, 7.14*eV}; |
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245 | |
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246 | //**Scintillator housing properties |
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247 | G4double Reflectivity[num] = {refl, refl}; |
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248 | G4double Efficiency[num] = {0.0, 0.0}; |
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249 | G4MaterialPropertiesTable* scintHsngPT = new G4MaterialPropertiesTable(); |
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250 | scintHsngPT->AddProperty("REFLECTIVITY", Ephoton, Reflectivity, num); |
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251 | scintHsngPT->AddProperty("EFFICIENCY", Ephoton, Efficiency, num); |
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252 | G4OpticalSurface* OpScintHousingSurface = |
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253 | new G4OpticalSurface("HousingSurface",unified,polished,dielectric_metal); |
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254 | OpScintHousingSurface->SetMaterialPropertiesTable(scintHsngPT); |
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255 | |
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256 | //**Sphere surface properties |
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257 | G4double SphereReflectivity[num] = {1.0, 1.0}; |
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258 | G4double SphereEfficiency[num] = {0.0, 0.0}; |
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259 | G4MaterialPropertiesTable* spherePT = new G4MaterialPropertiesTable(); |
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260 | spherePT->AddProperty("REFLECTIVITY", Ephoton, SphereReflectivity, num); |
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261 | spherePT->AddProperty("EFFICIENCY", Ephoton, SphereEfficiency, num); |
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262 | G4OpticalSurface* OpSphereSurface = |
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263 | new G4OpticalSurface("SphereSurface",unified,polished,dielectric_metal); |
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264 | OpSphereSurface->SetMaterialPropertiesTable(spherePT); |
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265 | |
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266 | //**Photocathode surface properties |
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267 | G4double photocath_EFF[num]={1.,1.}; //Enables 'detection' of photons |
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268 | G4double photocath_REFL[num]={0.,0.}; |
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269 | G4MaterialPropertiesTable* photocath_mt = new G4MaterialPropertiesTable(); |
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270 | photocath_mt->AddProperty("EFFICIENCY",Ephoton,photocath_EFF,num); |
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271 | photocath_mt->AddProperty("REFLECTIVITY",Ephoton,photocath_REFL,num); |
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272 | G4OpticalSurface* photocath_opsurf= |
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273 | new G4OpticalSurface("photocath_opsurf",glisur,polished, |
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274 | dielectric_metal); |
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275 | photocath_opsurf->SetMaterialPropertiesTable(photocath_mt); |
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276 | |
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277 | |
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278 | //**Create logical skin surfaces |
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279 | new G4LogicalSkinSurface("photocath_surf",housing_log, |
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280 | OpScintHousingSurface); |
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281 | new G4LogicalSkinSurface("sphere_surface",sphere_log,OpSphereSurface); |
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282 | new G4LogicalSkinSurface("photocath_surf",photocath_log,photocath_opsurf); |
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283 | } |
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284 | |
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285 | |
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286 | |
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