| 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 | // * cosmicray_charging advanced example for Geant4 *
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| 29 | // * (adapted simulation of test-mass charging in the LISA mission) *
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| 30 | // * *
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| 31 | // * Henrique Araujo (h.araujo@imperial.ac.uk) & Peter Wass *
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| 32 | // * Imperial College London *
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| 33 | // * *
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| 34 | // * LISADetectorConstruction class *
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| 35 | // * *
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| 36 | // ********************************************************************
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| 37 | //
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| 38 | // HISTORY
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| 39 | // 22/02/2004: migrated from LISA-V04
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| 40 | // 08/12/2005: removed compilation warnings
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| 41 | //
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| 42 | // ********************************************************************
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| 43 |
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| 44 |
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| 45 | // **************************************************************************
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| 46 | // Inertial Sensors: YZ-Injection, 46 mm Test Mass
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| 47 | // LISA Inertial Sensor Design Report LTP-RT-CGS-001, issue 2
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| 48 | //***************************************************************************
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| 49 |
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| 50 |
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| 51 | // Molybdenum cage (electrode housing)
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| 52 | G4double cage_o = 75.0*mm;
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| 53 | G4double cage_i_x = 53.8*mm;
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| 54 | G4double cage_i_y = 51.6*mm;
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| 55 | G4double cage_i_z = 52.8*mm;
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| 56 |
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| 57 | // Molybdenum disks (top and bottom)
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| 58 | G4double disk_thi = 3.0*mm;
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| 59 | G4double disk_id = 12.0*mm;
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| 60 | G4double disk_od = 60.0*mm;
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| 61 | G4double disk_off = 0.5*cage_o+0.5*disk_thi;
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| 62 |
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| 63 | // SHAPAL electrode supports
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| 64 | G4double elecsupp_x_thi = 6.5*mm;
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| 65 | G4double elecsupp_y_thi = 7.6*mm;
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| 66 | G4double elecsupp_yi_thi = 6.5*mm;
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| 67 | G4double elecsupp_z_thi = 7.0*mm;
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| 68 | G4double elecsupp_zi_thi = 6.5*mm;
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| 69 |
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| 70 |
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| 71 | // gold plating thickness
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| 72 | G4double elec_thi = 0.300*micrometer;
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| 73 |
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| 74 | // electrodes (x faces)
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| 75 | G4double elec_x_xoff = 0.5*cage_i_x + 0.5*elecsupp_x_thi + elec_thi;
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| 76 | G4double elec_x_y = 14.5*mm, elec_x_z = 36.0*mm;
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| 77 | G4double elec_x_yoff = 10.*mm;
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| 78 | // electrodes (y faces)
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| 79 | G4double elec_y_yoff = 0.5*cage_i_y + 0.5*elecsupp_y_thi + elec_thi;
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| 80 | G4double elec_y_x = 38.2*mm, elec_y_z = 7.1*mm;
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| 81 | G4double elec_y_zoff = 15.*mm;
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| 82 | // electrodes (y injection)
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| 83 | G4double elec_yi_yoff = 0.5*cage_i_y + 0.5*elecsupp_yi_thi + elec_thi;
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| 84 | G4double elec_yi_x = 38.2*mm, elec_yi_z = 16.0*mm;
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| 85 | // electrodes (z faces)
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| 86 | G4double elec_z_zoff = 0.5*cage_i_z + 0.5*elecsupp_z_thi + elec_thi;
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| 87 | G4double elec_z_x = 6.5*mm, elec_z_y = 37.0*mm;
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| 88 | // electrodes (z injection)
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| 89 | G4double elec_zi_x = 16.0*mm;
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| 90 | G4double elec_zi_y = 12.0*mm;
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| 91 | G4double elec_zi_zoff = 0.5*cage_i_z + 0.5*elecsupp_zi_thi + elec_thi;
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| 92 | G4double elec_zi_yoff = 12.*mm;
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| 93 |
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| 94 | // Test Mass
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| 95 | G4double tmass_len = 46.0*mm;
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| 96 |
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| 97 |
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| 98 |
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| 99 |
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| 100 | // Molybdenum cage **********************************************************
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| 101 | G4Box* cage_o_sol = new G4Box("cage_o_sol", .5*cage_o, .5*cage_o, .5*cage_o);
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| 102 | G4LogicalVolume* cage_o_log =
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| 103 | new G4LogicalVolume(cage_o_sol, molybdenum, "cage_o_log");
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| 104 | G4VPhysicalVolume* cage_o_phys;
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| 105 | cage_o_phys = new G4PVPlacement(0, G4ThreeVector(),
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| 106 | "cage_o_phys", cage_o_log, SensorHousing_i_phys, false, 0);
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| 107 | cage_o_log->SetVisAttributes(lgreen_vat);
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| 108 | // cage_o_log->SetVisAttributes(G4VisAttributes::Invisible);
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| 109 |
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| 110 | // 0.3 um gold plating
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| 111 | G4Box* goldplating_sol = new G4Box("goldplating_sol",
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| 112 | 0.5*cage_i_x+elec_thi, 0.5*cage_i_y+elec_thi, 0.5*cage_i_z+elec_thi);
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| 113 | G4LogicalVolume* goldplating_log =
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| 114 | new G4LogicalVolume(goldplating_sol, gold, "goldplating_log");
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| 115 | G4VPhysicalVolume* goldplating_phys;
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| 116 | goldplating_phys = new G4PVPlacement(0, G4ThreeVector(),
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| 117 | "goldplating_phys", goldplating_log, cage_o_phys, false, 0);
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| 118 | goldplating_log->SetVisAttributes(yellow_vat);
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| 119 |
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| 120 | // Inside cage
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| 121 | G4Box* cage_i_sol =
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| 122 | new G4Box("cage_i_sol", .5*cage_i_x, .5*cage_i_y, .5*cage_i_z);
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| 123 | G4LogicalVolume* cage_i_log =
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| 124 | new G4LogicalVolume(cage_i_sol, vacuum, "cage_i_log");
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| 125 | G4VPhysicalVolume* cage_i_phys;
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| 126 | cage_i_phys = new G4PVPlacement(0, G4ThreeVector(),
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| 127 | "cage_i_phys", cage_i_log, goldplating_phys, false, 0);
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| 128 | cage_i_log->SetVisAttributes(white_vat);
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| 129 |
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| 130 |
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| 131 | // Molybdenum disks *********************************************************
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| 132 | G4Tubs* disk_sol = new G4Tubs("disk_sol", 0.5*disk_id, 0.5*disk_od,
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| 133 | 0.5*disk_thi, 0., 360.*deg);
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| 134 | G4LogicalVolume* disk_log =
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| 135 | new G4LogicalVolume(disk_sol, molybdenum, "disk_log");
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| 136 | G4VPhysicalVolume* disk_phys;
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| 137 | disk_phys = new G4PVPlacement(0, G4ThreeVector(0,0,+disk_off),
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| 138 | "disk_phys", disk_log, SensorHousing_i_phys, false, 0);
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| 139 | disk_phys = new G4PVPlacement(0, G4ThreeVector(0,0,-disk_off),
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| 140 | "disk_phys", disk_log, SensorHousing_i_phys, false, 1);
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| 141 | disk_log->SetVisAttributes(lgreen_vat);
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| 142 | // disk_log->SetVisAttributes(G4VisAttributes::Invisible);
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| 143 |
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| 144 |
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| 145 |
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| 146 | // electrodes (x faces) *****************************************************
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| 147 | G4Box* elecsupp_x_sol =
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| 148 | new G4Box("elecsupp_x_sol", 0.5*elecsupp_x_thi,0.5*elec_x_y,0.5*elec_x_z);
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| 149 | G4LogicalVolume* elecsupp_x_log =
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| 150 | new G4LogicalVolume(elecsupp_x_sol, SHAPAL, "elecsupp_x_log");
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| 151 | G4VPhysicalVolume* elecsupp_x_phys;
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| 152 | elecsupp_x_phys = new G4PVPlacement(0,
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| 153 | G4ThreeVector(+elec_x_xoff,-elec_x_yoff,0),
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| 154 | "elecsupp_x_phys", elecsupp_x_log, cage_o_phys, false, 0);
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| 155 | elecsupp_x_phys = new G4PVPlacement(0,
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| 156 | G4ThreeVector(+elec_x_xoff,+elec_x_yoff,0),
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| 157 | "elecsupp_x_phys", elecsupp_x_log, cage_o_phys, false, 1);
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| 158 | elecsupp_x_phys = new G4PVPlacement(0,
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| 159 | G4ThreeVector(-elec_x_xoff,-elec_x_yoff,0),
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| 160 | "elecsupp_x_phys", elecsupp_x_log, cage_o_phys, false, 2);
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| 161 | elecsupp_x_phys = new G4PVPlacement(0,
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| 162 | G4ThreeVector(-elec_x_xoff,+elec_x_yoff,0),
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| 163 | "elecsupp_x_phys", elecsupp_x_log, cage_o_phys, false, 3);
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| 164 |
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| 165 |
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| 166 | // electrodes (y faces) *****************************************************
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| 167 | G4Box* elecsupp_y_sol =
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| 168 | new G4Box("elecsupp_y_sol", 0.5*elec_y_x,0.5*elecsupp_y_thi,0.5*elec_y_z);
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| 169 | G4LogicalVolume* elecsupp_y_log =
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| 170 | new G4LogicalVolume(elecsupp_y_sol, SHAPAL, "elecsupp_y_log");
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| 171 | G4VPhysicalVolume* elecsupp_y_phys;
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| 172 | elecsupp_y_phys = new G4PVPlacement(0,
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| 173 | G4ThreeVector(0,+elec_y_yoff,-elec_y_zoff),
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| 174 | "elecsupp_y_phys", elecsupp_y_log, cage_o_phys, false, 0);
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| 175 | elecsupp_y_phys = new G4PVPlacement(0,
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| 176 | G4ThreeVector(0,+elec_y_yoff,+elec_y_zoff),
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| 177 | "elecsupp_y_phys", elecsupp_y_log, cage_o_phys, false, 1);
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| 178 | elecsupp_y_phys = new G4PVPlacement(0,
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| 179 | G4ThreeVector(0,-elec_y_yoff,-elec_y_zoff),
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| 180 | "elecsupp_y_phys", elecsupp_y_log, cage_o_phys, false, 2);
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| 181 | elecsupp_y_phys = new G4PVPlacement(0,
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| 182 | G4ThreeVector(0,-elec_y_yoff,+elec_y_zoff),
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| 183 | "elecsupp_y_phys", elecsupp_y_log, cage_o_phys, false, 3);
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| 184 |
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| 185 | // y injection
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| 186 | G4Box* elecsupp_yi_sol =
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| 187 | new G4Box("elecsupp_yi_sol",.5*elec_yi_x,.5*elecsupp_yi_thi,.5*elec_yi_z);
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| 188 | G4LogicalVolume* elecsupp_yi_log =
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| 189 | new G4LogicalVolume(elecsupp_yi_sol, SHAPAL, "elecsupp_yi_log");
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| 190 | G4VPhysicalVolume* elecsupp_yi_phys;
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| 191 | elecsupp_yi_phys = new G4PVPlacement(0, G4ThreeVector(0,+elec_yi_yoff,0),
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| 192 | "elecsupp_yi_phys", elecsupp_yi_log, cage_o_phys, false, 0);
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| 193 | elecsupp_yi_phys = new G4PVPlacement(0, G4ThreeVector(0,-elec_yi_yoff,0),
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| 194 | "elecsupp_yi_phys", elecsupp_yi_log, cage_o_phys, false, 1);
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| 195 |
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| 196 |
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| 197 | // electrodes (z faces) *****************************************************
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| 198 | G4Box* elecsupp_z_sol =
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| 199 | new G4Box("elecsupp_z_sol",.5*elec_z_x,.5*elec_z_y,.5*elecsupp_z_thi);
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| 200 | G4LogicalVolume* elecsupp_z_log =
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| 201 | new G4LogicalVolume(elecsupp_z_sol, SHAPAL, "elecsupp_z_log");
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| 202 | G4VPhysicalVolume* elecsupp_z_phys;
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| 203 | elecsupp_z_phys = new G4PVPlacement(0,
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| 204 | G4ThreeVector(-elec_y_zoff,0,+elec_z_zoff),
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| 205 | "elecsupp_y_phys", elecsupp_z_log, cage_o_phys, false, 0);
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| 206 | elecsupp_z_phys = new G4PVPlacement(0,
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| 207 | G4ThreeVector(+elec_y_zoff,0,+elec_z_zoff),
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| 208 | "elecsupp_y_phys", elecsupp_z_log, cage_o_phys, false, 1);
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| 209 | elecsupp_z_phys = new G4PVPlacement(0,
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| 210 | G4ThreeVector(-elec_y_zoff,0,-elec_z_zoff),
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| 211 | "elecsupp_y_phys", elecsupp_z_log, cage_o_phys, false, 2);
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| 212 | elecsupp_z_phys = new G4PVPlacement(0,
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| 213 | G4ThreeVector(+elec_y_zoff,0,-elec_z_zoff),
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| 214 | "elecsupp_y_phys", elecsupp_z_log, cage_o_phys, false, 3);
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| 215 |
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| 216 | // z injection
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| 217 | G4Box* elecsupp_zi_sol =
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| 218 | new G4Box("elecsupp_zi_sol",.5*elec_zi_x,.5*elec_zi_y,.5*elecsupp_zi_thi);
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| 219 | G4LogicalVolume* elecsupp_zi_log =
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| 220 | new G4LogicalVolume(elecsupp_zi_sol, SHAPAL, "elecsupp_zi_log");
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| 221 | G4VPhysicalVolume* elecsupp_zi_phys;
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| 222 | elecsupp_zi_phys=new G4PVPlacement(0,
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| 223 | G4ThreeVector(0,-elec_zi_yoff,+elec_zi_zoff),
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| 224 | "elecsupp_zi_phys", elecsupp_zi_log, cage_o_phys, false, 0);
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| 225 | elecsupp_zi_phys=new G4PVPlacement(0,
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| 226 | G4ThreeVector(0,+elec_zi_yoff,+elec_zi_zoff),
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| 227 | "elecsupp_zi_phys", elecsupp_zi_log, cage_o_phys, false, 1);
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| 228 | elecsupp_zi_phys=new G4PVPlacement(0,
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| 229 | G4ThreeVector(0,-elec_zi_yoff,-elec_zi_zoff),
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| 230 | "elecsupp_zi_phys", elecsupp_zi_log, cage_o_phys, false, 2);
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| 231 | elecsupp_zi_phys=new G4PVPlacement(0,
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| 232 | G4ThreeVector(0,+elec_zi_yoff,-elec_zi_zoff),
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| 233 | "elecsupp_zi_phys", elecsupp_zi_log, cage_o_phys, false, 3);
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| 234 |
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| 235 | // electrode vis attributes
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| 236 | elecsupp_x_log ->SetVisAttributes(sol_white_vat);
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| 237 | elecsupp_y_log ->SetVisAttributes(sol_white_vat);
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| 238 | elecsupp_z_log ->SetVisAttributes(sol_white_vat);
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| 239 | elecsupp_yi_log->SetVisAttributes(sol_orange_vat);
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| 240 | elecsupp_zi_log->SetVisAttributes(sol_orange_vat);
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| 241 |
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| 242 |
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| 243 | // Test Masses **************************************************************
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| 244 | G4Box* tmass_sol =
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| 245 | new G4Box("tmass_sol", 0.5*tmass_len, 0.5*tmass_len, 0.5*tmass_len);
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| 246 | G4LogicalVolume* tmass_log =
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| 247 | new G4LogicalVolume(tmass_sol, AuPt, "tmass_log");
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| 248 | G4VPhysicalVolume* tmass_phys;
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| 249 | tmass_phys = new G4PVPlacement
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| 250 | (0, G4ThreeVector(), "tmass_phys", tmass_log, cage_i_phys, false, 0);
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| 251 | tmass_log->SetVisAttributes(sol_gold_vat);
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| 252 |
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| 253 |
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| 254 |
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| 255 | //*****************************************************************************
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