[807] | 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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