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 | // -------------------------------------------------------------- |
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28 | // GEANT 4 - ULTRA experiment example |
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29 | // -------------------------------------------------------------- |
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30 | // |
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31 | // Code developed by: |
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32 | // B. Tome, M.C. Espirito-Santo, A. Trindade, P. Rodrigues |
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33 | // |
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34 | // **************************************************** |
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35 | // * UltraFresnelLens.cc |
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36 | // **************************************************** |
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37 | // |
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38 | // Class for definition of the Ultra Fresnel Lens. |
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39 | // An UltraFresnelLens object is created in the UltraDetectorConstruction class. |
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40 | // This class makes use of the UltraFresnelLensParameterisation class. |
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41 | // The lens profile is define through the GetSagita method. |
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42 | // |
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43 | #include <cmath> |
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44 | #include "UltraFresnelLens.hh" |
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45 | #include "UltraFresnelLensParameterisation.hh" |
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46 | |
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47 | #include "G4Material.hh" |
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48 | #include "G4MaterialTable.hh" |
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49 | #include "G4Tubs.hh" |
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50 | #include "G4Cons.hh" |
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51 | #include "G4LogicalVolume.hh" |
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52 | #include "G4PVPlacement.hh" |
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53 | #include "G4PVParameterised.hh" |
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54 | #include "G4ThreeVector.hh" |
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55 | #include "G4VisAttributes.hh" |
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56 | |
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57 | UltraFresnelLens::UltraFresnelLens( G4double Diameter, G4int nGrooves, G4Material* Material, G4VPhysicalVolume * MotherPV, G4ThreeVector Pos) |
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58 | { |
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59 | |
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60 | LensMaterial = Material ; |
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61 | LensDiameter = Diameter ; |
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62 | NumberOfGrooves = nGrooves; |
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63 | GrooveWidth = (Diameter/2.0)/nGrooves ; |
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64 | LensPosition = Pos ; |
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65 | |
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66 | if( GrooveWidth <= 0 ){ |
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67 | G4Exception("UltraFresnelLens constructor: GrooveWidth<=0"); |
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68 | } |
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69 | |
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70 | |
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71 | G4double Rmin1 = (NumberOfGrooves-1)*(GrooveWidth) ; |
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72 | G4double Rmax1 = (NumberOfGrooves-0)*(GrooveWidth) ; |
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73 | LensThickness = GetSagita(Rmax1)-GetSagita(Rmin1) ; // Height of the highest groove |
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74 | |
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75 | BuildLens(MotherPV) ; |
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76 | |
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77 | } |
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78 | |
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79 | |
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80 | UltraFresnelLens::~UltraFresnelLens( ) |
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81 | {;} |
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82 | |
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83 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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84 | |
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85 | void UltraFresnelLens::BuildLens(G4VPhysicalVolume *MotherPV){ |
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86 | |
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87 | G4double StartPhi = 0.0 ; |
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88 | G4double DeltaPhi = twopi ; |
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89 | |
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90 | G4double LensMotherDz = LensThickness ; |
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91 | |
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92 | |
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93 | G4Tubs *LensMotherCylinder |
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94 | = new G4Tubs("LensMotherCylinder",0.0*mm,LensDiameter/2.0,LensMotherDz/2.0,StartPhi,DeltaPhi); |
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95 | |
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96 | G4Material *LensMotherMaterial = MotherPV->GetLogicalVolume()->GetMaterial() ; |
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97 | G4LogicalVolume *LensMotherLV |
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98 | = new G4LogicalVolume(LensMotherCylinder,LensMotherMaterial,"LensMotherLV",0,0,0); |
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99 | G4VPhysicalVolume *LensMotherPV |
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100 | = new G4PVPlacement(0,LensPosition,"LensMotherPV",LensMotherLV,MotherPV,false,0); |
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101 | |
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102 | LensMotherLV->SetVisAttributes (G4VisAttributes::Invisible); |
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103 | |
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104 | |
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105 | G4Cons *solidGroove |
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106 | = new G4Cons("Groove",40.0*mm,50.0*mm,40.0*mm,40.001*mm,1.0*mm,StartPhi,DeltaPhi); |
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107 | |
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108 | G4LogicalVolume *logicalGroove |
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109 | = new G4LogicalVolume(solidGroove,LensMaterial,"Groove_log",0,0,0); |
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110 | |
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111 | G4VPVParameterisation *FresnelLensParam = new UltraFresnelLensParameterisation(this); |
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112 | |
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113 | LensPhysicalVolume = |
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114 | new G4PVParameterised("LensPV",logicalGroove,LensMotherPV,kZAxis,NumberOfGrooves,FresnelLensParam) ; |
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115 | |
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116 | } |
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117 | |
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118 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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119 | |
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120 | G4double UltraFresnelLens::GetSagita(G4double radius) |
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121 | { |
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122 | |
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123 | G4double Conic = -1.0; |
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124 | G4double Curvature = 0.00437636761488/mm ; |
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125 | G4double Aspher[8] = { 4.206739256e-05/(mm), |
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126 | 9.6440152e-10/(mm3), |
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127 | -1.4884317e-15/(mm2*mm3), |
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128 | 0.0/(mm*mm3*mm3), |
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129 | 0.0/(mm3*mm3*mm3), |
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130 | 0.0/(mm2*mm3*mm3*mm3), |
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131 | 0.0/(mm*mm3*mm3*mm3*mm3), |
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132 | 0.0/(mm*3*mm3*mm3*mm3*mm3) |
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133 | }; |
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134 | |
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135 | G4double TotAspher = 0.0*mm ; |
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136 | |
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137 | for(G4int k=1;k<9;k++){ |
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138 | TotAspher += Aspher[k-1]*std::pow(radius,2*k) ; |
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139 | } |
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140 | |
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141 | G4double ArgSqrt = 1.0-(1.0+Conic)*std::pow(Curvature,2)*std::pow(radius,2) ; |
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142 | |
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143 | if (ArgSqrt < 0.0){ |
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144 | G4Exception("UltraFresnelLensParameterisation::Sagita: Square Root of <0 !"); |
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145 | } |
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146 | G4double Sagita_value = Curvature*std::pow(radius,2)/(1.0+std::sqrt(ArgSqrt)) + TotAspher; |
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147 | |
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148 | return Sagita_value ; |
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149 | |
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150 | |
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151 | } |
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152 | |
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153 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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154 | |
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155 | |
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