[1199] | 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 | // |
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| 29 | // |
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| 30 | // |
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| 31 | // Test routine for cerenkov proximity geometry taking into account reflection |
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| 32 | // |
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| 33 | // History: |
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| 34 | // |
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| 35 | // 07.11.07, V. Grichine |
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| 36 | |
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| 37 | #include "G4ios.hh" |
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| 38 | #include <fstream> |
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| 39 | #include <cmath> |
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| 40 | #include "globals.hh" |
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| 41 | #include "Randomize.hh" |
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| 42 | #include "G4UnitsTable.hh" |
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| 43 | |
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| 44 | |
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| 45 | #include <iomanip> |
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| 46 | |
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| 47 | #include "G4Isotope.hh" |
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| 48 | #include "G4Element.hh" |
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| 49 | #include "G4Material.hh" |
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| 50 | #include "G4MaterialCutsCouple.hh" |
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| 51 | #include "G4Region.hh" |
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| 52 | #include "G4ProductionCuts.hh" |
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| 53 | #include "G4RegionStore.hh" |
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| 54 | #include "G4MaterialTable.hh" |
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| 55 | |
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| 56 | #include "G4Box.hh" |
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| 57 | #include "G4LogicalVolume.hh" |
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| 58 | |
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| 59 | #include "G4VXTRenergyLoss.hh" |
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| 60 | #include "G4RegularXTRadiator.hh" |
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| 61 | #include "G4TransparentRegXTRadiator.hh" |
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| 62 | #include "G4GammaXTRadiator.hh" |
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| 63 | #include "G4StrawTubeXTRadiator.hh" |
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| 64 | |
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| 65 | #include "G4XTRGammaRadModel.hh" |
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| 66 | #include "G4XTRRegularRadModel.hh" |
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| 67 | #include "G4XTRTransparentRegRadModel.hh" |
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| 68 | |
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| 69 | #include "G4SynchrotronRadiation.hh" |
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| 70 | #include "G4Cerenkov.hh" |
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| 71 | |
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| 72 | #include "G4ParticleDefinition.hh" |
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| 73 | #include "G4Proton.hh" |
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| 74 | |
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| 75 | ////////////////////////////////////////////////////////////////// |
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| 76 | // |
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| 77 | // Return refractive index of C6F14 vs. photon energy in eV |
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| 78 | |
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| 79 | G4double GetRefractiveIndexA(G4double photonEnergy) |
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| 80 | { |
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| 81 | G4double n; |
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| 82 | G4double a = 1.177; |
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| 83 | G4double b = 0.0172; |
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| 84 | n = a + b*photonEnergy; |
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| 85 | return n; |
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| 86 | } |
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| 87 | |
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| 88 | ////////////////////////////////////////////////////////////////// |
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| 89 | // |
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| 90 | // Return refractive index of quartz vs. photon energy in eV |
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| 91 | |
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| 92 | G4double GetRefractiveIndexB(G4double photonEnergy) |
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| 93 | { |
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| 94 | G4double result, n2; |
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| 95 | |
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| 96 | G4double E1 = 10.666; |
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| 97 | G4double E2 = 18.125; |
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| 98 | G4double F1 = 46.411; |
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| 99 | G4double F2 = 228.71; |
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| 100 | G4double E = photonEnergy; |
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| 101 | |
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| 102 | n2 = 1. + F1/( E1*E1 - E*E ) + F2/( E2*E2 - E*E ); |
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| 103 | |
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| 104 | result = std::sqrt(n2); |
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| 105 | |
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| 106 | return result; |
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| 107 | } |
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| 108 | |
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| 109 | /////////////////////////////////////////////////////////////////// |
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| 110 | // |
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| 111 | // Photon emitted in B transported to C |
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| 112 | |
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| 113 | G4double TransmissionBC(G4double photonEnergy, G4double gamma) |
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| 114 | { |
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| 115 | G4double beta, cosB, sinB, nB, thickB, cosC, sinC, tmp, rBC, result; |
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| 116 | |
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| 117 | if( gamma < 1.) gamma = 1.; |
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| 118 | |
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| 119 | beta = std::sqrt(1 - 1/gamma/gamma); |
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| 120 | nB = GetRefractiveIndexB(photonEnergy); |
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| 121 | |
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| 122 | cosB = 1./nB/beta; |
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| 123 | |
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| 124 | if( cosB > 1.) cosB = 1.; |
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| 125 | |
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| 126 | sinB = std::sqrt(1 - cosB*cosB); |
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| 127 | |
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| 128 | thickB = 0.5; // in cm |
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| 129 | |
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| 130 | sinC = nB*sinB; |
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| 131 | |
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| 132 | if( sinC > 1.) sinC = 1.; |
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| 133 | |
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| 134 | cosC = std::sqrt(1 - sinC*sinC); |
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| 135 | |
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| 136 | tmp = ( nB*cosB - cosC )/( nB*cosB + cosC ); |
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| 137 | |
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| 138 | rBC = tmp*tmp; |
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| 139 | |
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| 140 | if(rBC > 1.) rBC = 1.; |
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| 141 | |
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| 142 | |
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| 143 | result = 369.77*thickB*2.; // 2 eV of band |
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| 144 | |
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| 145 | result *= sinB*sinB; |
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| 146 | |
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| 147 | result *= 1. - rBC; |
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| 148 | |
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| 149 | return result; |
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| 150 | } |
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| 151 | |
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| 152 | /////////////////////////////////////////////////////////////////// |
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| 153 | // |
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| 154 | // Photon emitted in A transported to C |
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| 155 | |
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| 156 | G4double TransmissionABC(G4double photonEnergy, G4double gamma) |
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| 157 | { |
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| 158 | G4double beta, cosA, sinA, cosB, sinB, nA, nB, thickA, cosC, sinC, tmp, rAB, rBC, result; |
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| 159 | |
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| 160 | if( gamma < 1.) gamma = 1.; |
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| 161 | |
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| 162 | beta = std::sqrt(1 - 1/gamma/gamma); |
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| 163 | nA = GetRefractiveIndexA(photonEnergy); |
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| 164 | nB = GetRefractiveIndexB(photonEnergy); |
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| 165 | |
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| 166 | cosA = 1./nA/beta; |
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| 167 | |
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| 168 | if( cosA > 1.) cosA = 1.; |
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| 169 | |
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| 170 | sinA = std::sqrt(1 - cosA*cosA); |
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| 171 | |
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| 172 | thickA = 1.5; // in cm |
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| 173 | |
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| 174 | sinB = nA*sinA/nB; |
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| 175 | |
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| 176 | if( sinB > 1.) sinB = 1.; |
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| 177 | |
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| 178 | cosB = std::sqrt(1 - sinB*sinB); |
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| 179 | |
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| 180 | tmp = ( nA*cosA - nB*cosB )/( nA*cosA + nB*cosB ); |
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| 181 | |
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| 182 | rAB = tmp*tmp; |
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| 183 | |
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| 184 | if(rAB > 1.) rAB = 1.; |
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| 185 | |
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| 186 | sinC = nB*sinB; |
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| 187 | |
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| 188 | if( sinC > 1.) sinC = 1.; |
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| 189 | |
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| 190 | cosC = std::sqrt(1 - sinC*sinC); |
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| 191 | |
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| 192 | tmp = ( nB*cosB - cosC )/( nB*cosB + cosC ); |
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| 193 | |
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| 194 | rBC = tmp*tmp; |
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| 195 | |
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| 196 | if(rBC > 1.) rBC = 1.; |
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| 197 | |
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| 198 | |
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| 199 | result = 369.77*thickA*2.; // 2 eV of band |
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| 200 | |
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| 201 | result *= sinB*sinB; |
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| 202 | |
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| 203 | result *= 1. - rAB; |
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| 204 | |
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| 205 | result *= 1. - rBC; |
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| 206 | |
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| 207 | return result; |
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| 208 | } |
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| 209 | |
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| 210 | |
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| 211 | int main() |
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| 212 | { |
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| 213 | G4int i, iMax = 20; |
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| 214 | G4double energy, refA, refB, gamma, numberBC, numberABC, beta, protonMass, protonMom; |
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| 215 | |
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| 216 | /* |
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| 217 | for(i=0;i<iMax;i++) |
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| 218 | { |
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| 219 | energy = 1. + i*8./iMax; |
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| 220 | refA = GetRefractiveIndexA(energy); |
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| 221 | refB = GetRefractiveIndexB(energy); |
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| 222 | G4cout<<"photon energy = "<<energy<<" eV; C6F14 = "<<refA<<"; quartz = "<<refB<<G4endl; |
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| 223 | } |
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| 224 | */ |
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| 225 | |
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| 226 | energy = 7.; |
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| 227 | protonMass = 0.938; |
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| 228 | |
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| 229 | |
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| 230 | for(i=0;i<iMax;i++) |
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| 231 | { |
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| 232 | gamma = 1.1 + i*2./iMax; |
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| 233 | beta = std::sqrt(1 - 1/gamma/gamma); |
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| 234 | protonMom = protonMass*beta*gamma; |
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| 235 | numberBC = TransmissionBC(energy, gamma); |
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| 236 | // G4cout<<"gamma = "<<gamma<<"; numberBC = "<<number<<G4endl; |
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| 237 | G4cout<<"protonMom = "<<protonMom<<"; numberBC = "<<numberBC<<G4endl; |
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| 238 | } |
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| 239 | |
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| 240 | for(i=0;i<iMax;i++) |
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| 241 | { |
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| 242 | gamma = 1.1 + i*2./iMax; |
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| 243 | beta = std::sqrt(1 - 1/gamma/gamma); |
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| 244 | protonMom = protonMass*beta*gamma; |
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| 245 | numberABC = TransmissionABC(energy, gamma); |
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| 246 | numberBC = TransmissionBC(energy, gamma); |
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| 247 | // G4cout<<"gamma = "<<gamma<<"; number = "<<number<<G4endl; |
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| 248 | G4cout<<"protonMom = "<<protonMom<<"; numberBC = "<<numberBC<<"; numberABC = "<<numberABC<<G4endl; |
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| 249 | } |
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| 250 | |
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| 251 | |
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| 252 | |
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| 253 | |
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| 254 | return 1 ; |
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| 255 | } |
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| 256 | |
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