[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 | // $Id: testPropagateSpin.cc,v 1.17 2006/06/29 18:25:06 gunter Exp $ |
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[1231] | 28 | // GEANT4 tag $Name: $ |
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[1199] | 29 | // |
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| 30 | // |
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| 31 | // |
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| 32 | // Started from testG4Navigator1.cc,v 1.7 1996/08/29 15:42 pkent |
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| 33 | // Locate & Step within simple boxlike geometry, both |
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| 34 | // with and without voxels. Parameterised volumes are included. |
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| 35 | |
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| 36 | #include <assert.h> |
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| 37 | // #include "ApproxEqual.hh" |
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| 38 | |
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| 39 | // Global defs |
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| 40 | #include "globals.hh" |
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| 41 | |
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| 42 | #include "G4Navigator.hh" |
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| 43 | |
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| 44 | #include "G4LogicalVolume.hh" |
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| 45 | #include "G4VPhysicalVolume.hh" |
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| 46 | #include "G4PVPlacement.hh" |
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| 47 | #include "G4PVParameterised.hh" |
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| 48 | #include "G4VPVParameterisation.hh" |
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| 49 | #include "G4Box.hh" |
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| 50 | |
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| 51 | #include "G4GeometryManager.hh" |
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| 52 | |
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| 53 | #include "G4RotationMatrix.hh" |
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| 54 | #include "G4ThreeVector.hh" |
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| 55 | |
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| 56 | #include "G4UniformMagField.hh" |
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| 57 | |
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| 58 | #include "G4ios.hh" |
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| 59 | #include <iomanip> |
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| 60 | |
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| 61 | // Sample Parameterisation |
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| 62 | class G4LinScale : public G4VPVParameterisation |
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| 63 | { |
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| 64 | virtual void ComputeTransformation(const G4int n, |
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| 65 | G4VPhysicalVolume* pRep) const |
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| 66 | { |
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| 67 | pRep->SetTranslation(G4ThreeVector(0,(n-1)*15,0)); |
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| 68 | } |
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| 69 | |
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| 70 | virtual void ComputeDimensions(G4Box &pBox, |
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| 71 | const G4int n, |
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| 72 | const G4VPhysicalVolume*) const |
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| 73 | { |
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| 74 | pBox.SetXHalfLength(10); |
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| 75 | pBox.SetYHalfLength(5+n); |
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| 76 | pBox.SetZHalfLength(5+n); |
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| 77 | } |
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| 78 | |
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| 79 | virtual void ComputeDimensions(G4Tubs &, |
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| 80 | const G4int , |
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| 81 | const G4VPhysicalVolume*) const {} |
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| 82 | virtual void ComputeDimensions(G4Trd &, |
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| 83 | const G4int, |
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| 84 | const G4VPhysicalVolume*) const {} |
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| 85 | virtual void ComputeDimensions(G4Cons &, |
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| 86 | const G4int , |
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| 87 | const G4VPhysicalVolume*) const {} |
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| 88 | virtual void ComputeDimensions(G4Trap &, |
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| 89 | const G4int , |
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| 90 | const G4VPhysicalVolume*) const {} |
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| 91 | virtual void ComputeDimensions(G4Hype &, |
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| 92 | const G4int , |
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| 93 | const G4VPhysicalVolume*) const {} |
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| 94 | virtual void ComputeDimensions(G4Orb &, |
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| 95 | const G4int , |
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| 96 | const G4VPhysicalVolume*) const {} |
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| 97 | virtual void ComputeDimensions(G4Sphere &, |
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| 98 | const G4int , |
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| 99 | const G4VPhysicalVolume*) const {} |
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| 100 | virtual void ComputeDimensions(G4Torus &, |
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| 101 | const G4int , |
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| 102 | const G4VPhysicalVolume*) const {} |
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| 103 | virtual void ComputeDimensions(G4Para &, |
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| 104 | const G4int , |
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| 105 | const G4VPhysicalVolume*) const {} |
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| 106 | virtual void ComputeDimensions(G4Polycone &, |
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| 107 | const G4int , |
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| 108 | const G4VPhysicalVolume*) const {} |
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| 109 | virtual void ComputeDimensions(G4Polyhedra &, |
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| 110 | const G4int , |
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| 111 | const G4VPhysicalVolume*) const {} |
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| 112 | }; |
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| 113 | G4LinScale myParam; |
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| 114 | |
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| 115 | // Build simple geometry: |
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| 116 | // 4 small cubes + 1 slab (all G4Boxes) are positioned inside a larger cuboid |
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| 117 | G4VPhysicalVolume* BuildGeometry() |
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| 118 | { |
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| 119 | |
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| 120 | G4Box *myHugeBox= new G4Box("huge box",15*m,15*m,25*m); |
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| 121 | G4Box *myBigBox= new G4Box("big cube",10*m,10*m,10*m); |
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| 122 | G4Box *mySmallBox= new G4Box("smaller cube",2.5*m,2.5*m,2.5*m); |
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| 123 | G4Box *myTinyBox= new G4Box("tiny cube",.25*m,.25*m,.25*m); |
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| 124 | |
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| 125 | // World Volume |
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| 126 | // |
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| 127 | G4LogicalVolume *worldLog=new G4LogicalVolume(myHugeBox,0, |
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| 128 | "World",0,0,0); |
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| 129 | // Logical with no material,field, |
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| 130 | // sensitive detector or user limits |
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| 131 | |
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| 132 | G4PVPlacement *worldPhys=new |
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| 133 | G4PVPlacement(0,G4ThreeVector(0,0,0), "World",worldLog, |
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| 134 | 0,false,0); |
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| 135 | // Note: no mother pointer set |
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| 136 | |
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| 137 | // Create the logical Volumes |
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| 138 | // |
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| 139 | // G4LogicalVolume(*pSolid, *pMaterial, Name, *pField, *pSDetector, *pULimits) |
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| 140 | // |
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| 141 | G4LogicalVolume *BigBoxLog=new G4LogicalVolume(myBigBox,0, |
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| 142 | "Crystal Box (large)",0,0,0); |
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| 143 | G4LogicalVolume *smallBoxLog=new G4LogicalVolume(mySmallBox,0, |
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| 144 | "Crystal Box (small)"); |
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| 145 | G4LogicalVolume *tinyBoxLog=new G4LogicalVolume(myTinyBox,0, |
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| 146 | "Crystal Box (tiny)"); |
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| 147 | |
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| 148 | |
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| 149 | // Place them. |
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| 150 | // |
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| 151 | // 1) Two big boxes in the world volume |
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| 152 | // |
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| 153 | // G4PVPlacement *BigTg1Phys= |
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| 154 | new G4PVPlacement(0,G4ThreeVector(0,0,-15*m), |
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| 155 | "Big Target 1",BigBoxLog, |
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| 156 | worldPhys,false,0); |
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| 157 | // G4PVPlacement *BigTg2Phys= |
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| 158 | new G4PVPlacement(0,G4ThreeVector(0,0, 15*m), |
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| 159 | "Big Target 2",BigBoxLog, |
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| 160 | worldPhys,false,0); |
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| 161 | |
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| 162 | // 2) Four (medium) boxes in X & Y near the origin of the world volume |
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| 163 | // |
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| 164 | // G4PVPlacement *MedTg3a_Phys= |
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| 165 | new G4PVPlacement(0,G4ThreeVector(0, 7.5*m,0), |
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| 166 | "Target 3a",smallBoxLog, |
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| 167 | worldPhys,false,0); |
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| 168 | // G4PVPlacement *MedTg3b_Phys= |
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| 169 | new G4PVPlacement(0,G4ThreeVector(0,-7.5*m,0), |
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| 170 | "Target 3b",smallBoxLog, |
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| 171 | worldPhys,false,0); |
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| 172 | // G4PVPlacement *MedTg3c_Phys= |
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| 173 | new G4PVPlacement(0,G4ThreeVector(-7.5*m,0,0), |
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| 174 | "Target 3c",smallBoxLog, |
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| 175 | worldPhys,false,0); |
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| 176 | // G4PVPlacement *MedTg3d_Phys= |
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| 177 | new G4PVPlacement(0,G4ThreeVector( 7.5*m,0,0), |
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| 178 | "Target 3d",smallBoxLog, |
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| 179 | worldPhys,false,0); |
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| 180 | |
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| 181 | |
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| 182 | // 3) Eight small boxes around the origin of the world volume |
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| 183 | // (in +-X, +-Y & +-Z) |
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| 184 | // |
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| 185 | // G4PVPlacement *SmTg4a_Phys= |
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| 186 | new G4PVPlacement |
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| 187 | (0,G4ThreeVector( 0.3*m, 0.3*m,0.3*m), "Target 4a",tinyBoxLog, |
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| 188 | worldPhys,false,0); |
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| 189 | // G4PVPlacement *SmTg4b_Phys= |
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| 190 | new G4PVPlacement |
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| 191 | (0,G4ThreeVector( 0.3*m,-0.3*m,0.3*m), "Target 4b",tinyBoxLog, |
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| 192 | worldPhys,false,0); |
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| 193 | // G4PVPlacement *SmTg4c_Phys= |
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| 194 | new G4PVPlacement |
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| 195 | (0,G4ThreeVector(-0.3*m,-0.3*m,0.3*m), "Target 4c",tinyBoxLog, |
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| 196 | worldPhys,false,0); |
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| 197 | // G4PVPlacement *SmTg4d_Phys= |
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| 198 | new G4PVPlacement |
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| 199 | (0,G4ThreeVector(-0.3*m, 0.3*m,0.3*m), "Target 4d",tinyBoxLog, |
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| 200 | worldPhys,false,0); |
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| 201 | |
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| 202 | // G4PVPlacement *SmTg4e_Phys= |
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| 203 | new G4PVPlacement |
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| 204 | (0,G4ThreeVector( 0.3*m, 0.3*m,-0.3*m), "Target 4e",tinyBoxLog, |
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| 205 | worldPhys,false,0); |
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| 206 | // G4PVPlacement *SmTg4f_Phys= |
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| 207 | new G4PVPlacement |
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| 208 | (0,G4ThreeVector( 0.3*m,-0.3*m,-0.3*m), "Target 4f",tinyBoxLog, |
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| 209 | worldPhys,false,0); |
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| 210 | // G4PVPlacement *SmTg4g_Phys= |
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| 211 | new G4PVPlacement |
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| 212 | (0,G4ThreeVector(-0.3*m,-0.3*m,-0.3*m), "Target 4g",tinyBoxLog, |
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| 213 | worldPhys,false,0); |
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| 214 | // G4PVPlacement *SmTg4h_Phys= |
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| 215 | new G4PVPlacement |
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| 216 | (0,G4ThreeVector(-0.3*m, 0.3*m,-0.3*m), "Target 4h",tinyBoxLog, |
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| 217 | worldPhys,false,0); |
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| 218 | |
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| 219 | return worldPhys; |
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| 220 | } |
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| 221 | |
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| 222 | #include "G4ChordFinder.hh" |
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| 223 | #include "G4PropagatorInField.hh" |
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| 224 | #include "G4MagneticField.hh" |
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| 225 | #include "G4FieldManager.hh" |
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| 226 | #include "G4TransportationManager.hh" |
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| 227 | #include "G4HelixExplicitEuler.hh" |
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| 228 | #include "G4HelixSimpleRunge.hh" |
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| 229 | #include "G4HelixImplicitEuler.hh" |
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| 230 | #include "G4ExplicitEuler.hh" |
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| 231 | #include "G4ImplicitEuler.hh" |
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| 232 | #include "G4SimpleRunge.hh" |
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| 233 | #include "G4SimpleHeum.hh" |
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| 234 | #include "G4ClassicalRK4.hh" |
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| 235 | #include "G4Mag_SpinEqRhs.hh" |
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| 236 | #include "G4CashKarpRKF45.hh" |
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| 237 | #include "G4RKG3_Stepper.hh" |
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| 238 | |
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| 239 | G4UniformMagField myMagField(10.*tesla, 0., 0.); |
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| 240 | |
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| 241 | |
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| 242 | G4FieldManager* SetupField(G4int type) |
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| 243 | { |
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| 244 | G4FieldManager *pFieldMgr; |
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| 245 | G4ChordFinder *pChordFinder; |
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| 246 | G4Mag_SpinEqRhs *fEquation = new G4Mag_SpinEqRhs(&myMagField); |
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| 247 | G4MagIntegratorStepper *pStepper; |
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| 248 | |
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| 249 | const int ncompspin=12; |
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| 250 | |
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| 251 | switch ( type ) |
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| 252 | { |
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| 253 | case 0: pStepper = new G4ExplicitEuler( fEquation, ncompspin ); break; |
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| 254 | case 1: pStepper = new G4ImplicitEuler( fEquation, ncompspin ); break; |
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| 255 | case 2: pStepper = new G4SimpleRunge( fEquation, ncompspin ); break; |
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| 256 | case 3: pStepper = new G4SimpleHeum( fEquation, ncompspin ); break; |
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| 257 | case 4: pStepper = new G4ClassicalRK4( fEquation, ncompspin ); break; |
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| 258 | case 8: pStepper = new G4CashKarpRKF45( fEquation, ncompspin ); break; |
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| 259 | default: pStepper = new G4ClassicalRK4( fEquation, ncompspin ); break; |
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| 260 | } |
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| 261 | |
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| 262 | pFieldMgr= G4TransportationManager::GetTransportationManager()-> |
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| 263 | GetFieldManager(); |
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| 264 | |
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| 265 | pFieldMgr->SetDetectorField( &myMagField ); |
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| 266 | |
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| 267 | pChordFinder = new G4ChordFinder( &myMagField, |
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| 268 | 1.0e-2 * mm, |
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| 269 | pStepper); |
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| 270 | pChordFinder->SetVerbose(1); // ity(); |
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| 271 | |
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| 272 | pFieldMgr->SetChordFinder( pChordFinder ); |
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| 273 | |
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| 274 | return pFieldMgr; |
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| 275 | } |
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| 276 | |
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| 277 | G4PropagatorInField* SetupPropagator( G4int type) |
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| 278 | { |
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| 279 | // G4FieldManager* fieldMgr= |
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| 280 | SetupField( type) ; |
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| 281 | |
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| 282 | // G4ChordFinder theChordFinder( &MagField, 0.05*mm ); // Default stepper |
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| 283 | |
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| 284 | G4PropagatorInField *thePropagator = |
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| 285 | G4TransportationManager::GetTransportationManager()-> |
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| 286 | GetPropagatorInField (); |
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| 287 | |
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| 288 | // Let us test the new Minimum Epsilon Step functionality |
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| 289 | thePropagator -> SetMinimumEpsilonStep( 1.0e-7 ) ; |
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| 290 | thePropagator -> SetMaximumEpsilonStep( 1.0e-7 ) ; |
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| 291 | |
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| 292 | return thePropagator; |
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| 293 | } |
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| 294 | |
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| 295 | // This is Done only for this test program ... the transportation does it. |
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| 296 | // The method is now obsolete -- as propagator in Field has this method, |
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| 297 | // in order to message the correct field manager's chord finder. |
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| 298 | // |
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| 299 | void ObsoleteSetChargeMomentumMass(G4double charge, G4double MomentumXc, G4double Mass) |
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| 300 | { |
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| 301 | G4ChordFinder* pChordFinder; |
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| 302 | |
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| 303 | pChordFinder= G4TransportationManager::GetTransportationManager()-> |
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| 304 | GetFieldManager()->GetChordFinder(); |
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| 305 | |
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| 306 | pChordFinder->SetChargeMomentumMass( |
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| 307 | charge, // charge in e+ units |
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| 308 | MomentumXc, // Momentum in Mev/c ? |
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| 309 | Mass ); |
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| 310 | } |
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| 311 | |
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| 312 | G4PropagatorInField *pMagFieldPropagator; |
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| 313 | // |
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| 314 | // Test Stepping |
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| 315 | // |
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| 316 | G4bool testG4PropagatorInField(G4VPhysicalVolume*, // *pTopNode, |
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| 317 | G4int ) // type) |
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| 318 | { |
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| 319 | void report_endPV(G4ThreeVector Position, |
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| 320 | G4ThreeVector UnitVelocity, |
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| 321 | G4ThreeVector Spin, |
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| 322 | G4double step_len, |
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| 323 | G4double physStep, |
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| 324 | G4double safety, |
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| 325 | G4ThreeVector EndPosition, |
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| 326 | G4ThreeVector EndUnitVelocity, |
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| 327 | G4ThreeVector EndSpin, |
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| 328 | G4int Step, |
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| 329 | G4VPhysicalVolume* startVolume); |
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| 330 | |
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| 331 | G4UniformMagField MagField(10.*tesla, 0., 0.); // Tesla Defined ? |
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| 332 | G4TransportationManager* transpMgr = G4TransportationManager:: |
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| 333 | GetTransportationManager(); |
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| 334 | G4Navigator* pNavig= transpMgr-> GetNavigatorForTracking(); |
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| 335 | |
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| 336 | // pMagFieldPropagator= SetupPropagator(type); |
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| 337 | |
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| 338 | G4cout << "Test G4PropInFld with " |
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| 339 | << "optimise = " |
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| 340 | << ( pMagFieldPropagator->GetUseSafetyForOptimization() ? "on" : "off" ) |
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| 341 | // << " Eps min= " << pMagFieldPropagator->GetMinimumEpsilonStep() |
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| 342 | // << " & max= " << pMagFieldPropagator->GetMaximumEpsilonStep() |
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| 343 | << G4endl; |
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| 344 | |
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| 345 | const G4FieldManager* pFieldMgr= transpMgr->GetFieldManager(); |
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| 346 | G4cout << " The global field manager has the following parameters " |
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| 347 | << G4endl; |
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| 348 | G4cout << " Eps min= " << pFieldMgr->GetMinimumEpsilonStep() |
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| 349 | << " & max= " << pFieldMgr->GetMaximumEpsilonStep() |
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| 350 | << G4endl; |
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| 351 | G4cout << " Delta Intersection= " << pFieldMgr->GetDeltaIntersection() |
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| 352 | << " Delta One step = " << pFieldMgr->GetDeltaOneStep() |
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| 353 | << G4endl; |
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| 354 | |
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| 355 | |
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| 356 | pMagFieldPropagator->SetChargeMomentumMass( |
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| 357 | +1., // charge in e+ units |
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| 358 | 0.1*GeV, // Momentum in Mev/c ? |
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| 359 | 0.105658387*GeV ); |
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| 360 | // pNavig->SetWorldVolume(pTopNode); |
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| 361 | |
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| 362 | |
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| 363 | G4VPhysicalVolume *located; |
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| 364 | G4double step_len, physStep, safety; |
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| 365 | G4ThreeVector xHat(1,0,0),yHat(0,1,0),zHat(0,0,1); |
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| 366 | G4ThreeVector mxHat(-1,0,0),myHat(0,-1,0),mzHat(0,0,-1); |
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| 367 | |
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| 368 | // physStep=kInfinity; |
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| 369 | G4ThreeVector Position(0.,0.,0.); |
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| 370 | G4ThreeVector UnitMomentum(0.,0.6,0.8); |
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| 371 | G4ThreeVector EndPosition, EndUnitMomentum; |
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| 372 | |
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| 373 | // |
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| 374 | // Test location & Step computation |
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| 375 | // |
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| 376 | /* assert(located->GetName()=="World"); */ |
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| 377 | |
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| 378 | const G4double threshold= 1.e-6; |
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| 379 | |
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| 380 | if( std::fabs(UnitMomentum.mag() - 1.0) > threshold ) |
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| 381 | { |
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| 382 | G4cout << "UnitMomentum.mag() - 1.0 = " << UnitMomentum.mag() - 1.0 << |
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| 383 | G4endl; |
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| 384 | } |
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| 385 | |
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| 386 | G4cout << G4endl; |
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| 387 | |
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| 388 | for( int iparticle=0; iparticle < 2; iparticle++ ) |
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| 389 | { |
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| 390 | physStep= 2.5 * mm ; // millimeters |
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| 391 | Position = G4ThreeVector(0.,0.,0.) |
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| 392 | + iparticle * G4ThreeVector(0.2, 0.3, 0.4); |
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| 393 | // ->GetChordFinder().SetChargeAndMomentum( |
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| 394 | |
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| 395 | G4double momentum_val= (0.5+iparticle*1.0) * 0.1*GeV; // As energy/c |
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| 396 | G4double rest_mass = 0.105658387*GeV; // A muon |
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| 397 | |
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| 398 | G4double momentum_sq = momentum_val * momentum_val; |
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| 399 | G4double kineticEnergy = momentum_sq / |
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| 400 | ( std::sqrt( momentum_sq + rest_mass * rest_mass ) |
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| 401 | + rest_mass ); |
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| 402 | G4double labTof= 10.0*ns, properTof= 0.1*ns; |
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| 403 | pMagFieldPropagator->SetChargeMomentumMass( |
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| 404 | +1, // charge in e+ units |
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| 405 | momentum_val, |
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| 406 | rest_mass); |
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| 407 | |
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| 408 | UnitMomentum = (G4ThreeVector(0.,0.6,0.8) |
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| 409 | + (float)iparticle * G4ThreeVector(0.1, 0.2, 0.3)).unit(); |
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| 410 | G4double beta = momentum_val / std::sqrt( rest_mass*rest_mass + momentum_val*momentum_val ); |
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| 411 | G4double VelocityMag = beta * c_light; |
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| 412 | G4ThreeVector Velocity = VelocityMag * UnitMomentum ; |
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| 413 | |
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| 414 | G4cout << G4endl; |
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| 415 | G4cout << "Test PropagateMagField: ***********************" << G4endl |
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| 416 | << " Starting New Particle with Position " << Position << G4endl |
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| 417 | << " and UnitVelocity " << UnitMomentum << G4endl; |
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| 418 | G4cout << " Momentum in MeV/c is "<< (0.5+iparticle*1.0)*0.1*GeV/MeV; |
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| 419 | G4cout << G4endl; |
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| 420 | |
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| 421 | G4ThreeVector initialSpin = UnitMomentum; |
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| 422 | |
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| 423 | for( int istep=0; istep < 14; istep++ ){ |
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| 424 | // // G4cout << "UnitMomentum Magnitude is " << UnitMomentum.mag() << G4endl; |
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| 425 | located= pNavig->LocateGlobalPointAndSetup(Position); |
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| 426 | // Is the following better ?? It would need "changes" |
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| 427 | // located= pMagFieldPropagator->LocateGlobalPointAndSetup(Position); |
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| 428 | // G4cout << "Starting Step " << istep << " in volume " |
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| 429 | // << located->GetName() << G4endl; |
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| 430 | |
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| 431 | // G4FieldTrack stateVec( Position, Velocity, 0.0, 0.0, |
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| 432 | // 0.0, 0.0, &initialSpin ); |
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| 433 | |
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| 434 | G4FieldTrack stateVec( Position, |
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| 435 | UnitMomentum, |
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| 436 | 0.0, // starting S curve len |
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| 437 | kineticEnergy, |
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| 438 | rest_mass, |
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| 439 | VelocityMag, |
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| 440 | labTof, |
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| 441 | properTof, |
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| 442 | &initialSpin |
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| 443 | ); |
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| 444 | |
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| 445 | step_len=pMagFieldPropagator->ComputeStep( stateVec, |
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| 446 | physStep, safety |
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| 447 | ,located); |
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| 448 | // -------------------- |
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| 449 | EndPosition= pMagFieldPropagator->EndPosition(); |
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| 450 | EndUnitMomentum= pMagFieldPropagator->EndMomentumDir(); |
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| 451 | // -------- |
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| 452 | G4FieldTrack EndFieldTrack= pMagFieldPropagator->GetEndState(); |
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| 453 | G4ThreeVector EndSpin= EndFieldTrack.GetSpin(); |
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| 454 | G4ThreeVector EndUnitMomentum = EndFieldTrack.GetMomentumDir(); |
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| 455 | |
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| 456 | // G4cout << " EndPosition " << EndPosition << G4endl; |
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| 457 | // G4cout << " EndUnitMomentum " << EndUnitMomentum << G4endl; |
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| 458 | // G4cout << " initialSpin " << initialSpin.mag() << G4endl; |
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| 459 | // G4cout << " EndSpin " << EndSpin.mag() << G4endl; |
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| 460 | |
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| 461 | if( std::fabs(EndUnitMomentum.mag2() - 1.0) > threshold ) |
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| 462 | G4cout << "EndUnitMomentum.mag2() - 1.0 = " << |
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| 463 | EndUnitMomentum.mag2() - 1.0 << G4endl; |
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| 464 | |
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| 465 | // In this case spin should be parallel (equal) to momentum |
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| 466 | G4double magdiff= (EndUnitMomentum - EndSpin).mag(); |
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| 467 | if( magdiff > 1.e-8 ){ |
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| 468 | G4cout.precision(4); |
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| 469 | G4cout << " Spin is not equal to Momentum " |
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| 470 | << " Diff = " << magdiff << G4endl; |
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| 471 | } |
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| 472 | |
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| 473 | G4ThreeVector MoveVec = EndPosition - Position; |
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| 474 | assert( MoveVec.mag() < physStep*(1.+1.e-9) ); |
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| 475 | |
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| 476 | // G4cout << " testPropagatorInField: After stepI " << istep << " : " << G4endl; |
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| 477 | report_endPV(Position, UnitMomentum, initialSpin, step_len, physStep, safety, |
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| 478 | EndPosition, EndUnitMomentum, EndSpin, istep, located ); |
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| 479 | |
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| 480 | assert(safety>=0); |
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| 481 | pNavig->SetGeometricallyLimitedStep(); |
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| 482 | // pMagFieldPropagator->SetGeometricallyLimitedStep(); |
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| 483 | |
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| 484 | Position= EndPosition; |
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| 485 | UnitMomentum= EndUnitMomentum; |
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| 486 | initialSpin = EndSpin; |
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| 487 | |
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| 488 | physStep *= 2.; |
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| 489 | } // ........................... end for ( istep ) |
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| 490 | } // .............................. end for ( iparticle ) |
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| 491 | |
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| 492 | return(1); |
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| 493 | } |
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| 494 | |
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| 495 | void report_endPV(G4ThreeVector Position, |
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| 496 | G4ThreeVector, // UnitVelocity, |
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| 497 | G4ThreeVector, // Spin, |
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| 498 | G4double step_len, |
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| 499 | G4double physStep, |
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| 500 | G4double safety, |
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| 501 | G4ThreeVector EndPosition, |
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| 502 | G4ThreeVector EndUnitVelocity, |
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| 503 | G4ThreeVector EndSpin, |
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| 504 | G4int Step, |
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| 505 | G4VPhysicalVolume* startVolume) |
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| 506 | // G4VPhysicalVolume* endVolume) |
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| 507 | { |
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| 508 | const G4int verboseLevel=1; |
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| 509 | G4int oldPrec= G4cout.precision(4); |
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| 510 | |
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| 511 | if( Step == 0 && verboseLevel <= 3 ) |
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| 512 | { |
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| 513 | // G4cout.precision(6); |
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| 514 | // G4cout.setf(ios_base::fixed,ios_base::floatfield); |
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| 515 | G4cout << std::setw( 3) << "Stp#" << " " |
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| 516 | << std::setw( 7) << "X(mm)" << " " |
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| 517 | << std::setw( 7) << "Y(mm)" << " " |
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| 518 | << std::setw( 7) << "Z(mm)" << " " |
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| 519 | << std::setw( 7) << " N_x " << " " |
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| 520 | << std::setw( 7) << " N_y " << " " |
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| 521 | << std::setw( 7) << " N_z " << " " |
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| 522 | << std::setw( 7) << " S_x " << " " |
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| 523 | << std::setw( 7) << " S_y " << " " |
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| 524 | << std::setw( 7) << " S_z " << " " |
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| 525 | << std::setw( 9) << " |S-N|" << " " |
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| 526 | << std::setw( 9) << " (S_z-N_z) " << " " |
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| 527 | // << std::setw( 9) << "KinE(MeV)" << " " |
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| 528 | // << std::setw( 9) << "dE(MeV)" << " " |
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| 529 | << std::setw( 9) << "StepLen" << " " |
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| 530 | << std::setw( 9) << "PhsStep" << " " |
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| 531 | << std::setw( 9) << "Safety" << " " |
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| 532 | << std::setw(18) << "NextVolume" << " " |
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| 533 | << G4endl; |
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| 534 | } |
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| 535 | // |
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| 536 | // |
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| 537 | if( verboseLevel > 3 ) |
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| 538 | { |
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| 539 | G4cout << "End Position is " << EndPosition << G4endl |
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| 540 | << " and UnitVelocity is " << EndUnitVelocity << G4endl; |
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| 541 | G4cout << "Step taken was " << step_len |
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| 542 | << " out of PhysicalStep= " << physStep << G4endl; |
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| 543 | G4cout << "Final safety is: " << safety << G4endl; |
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| 544 | |
---|
| 545 | G4cout << "Chord length = " << (EndPosition-Position).mag() << G4endl; |
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| 546 | G4cout << G4endl; |
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| 547 | } |
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| 548 | else // if( verboseLevel > 0 ) |
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| 549 | { |
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| 550 | G4cout.precision(3); // 4 ? |
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| 551 | G4cout << std::setw( 3) << Step << " " |
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| 552 | << std::setw( 7) << Position.x() << " " |
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| 553 | << std::setw( 7) << Position.y() << " " |
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| 554 | << std::setw( 7) << Position.z() << " " |
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| 555 | << std::setw( 7) << EndUnitVelocity.x() << " " |
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| 556 | << std::setw( 7) << EndUnitVelocity.y() << " " |
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| 557 | << std::setw( 7) << EndUnitVelocity.z() << " " |
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| 558 | << std::setw( 7) << EndSpin.x() << " " |
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| 559 | << std::setw( 7) << EndSpin.y() << " " |
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| 560 | << std::setw( 7) << EndSpin.z() << " "; |
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| 561 | G4cout.precision(2); |
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| 562 | G4cout << std::setw( 8) << (EndSpin-EndUnitVelocity).mag() << " " |
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| 563 | << std::setw( 8) << EndSpin.z() - EndUnitVelocity.z() << " "; |
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| 564 | // << std::setw( 9) << KineticEnergy << " " |
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| 565 | // << std::setw( 9) << EnergyDifference << " " |
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| 566 | G4cout.precision(6); |
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| 567 | G4cout << std::setw( 9) << step_len << " " |
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| 568 | << std::setw( 9) << physStep << " "; |
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| 569 | G4cout.precision(3); // could be 4 ? |
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| 570 | G4cout << std::setw( 9) << safety << " "; |
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| 571 | if( startVolume != 0) { |
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| 572 | G4cout << std::setw(12) << startVolume->GetName() << " "; |
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| 573 | } else { |
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| 574 | G4cout << std::setw(12) << "OutOfWorld" << " "; |
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| 575 | } |
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| 576 | |
---|
| 577 | #if 0 |
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| 578 | if( endVolume != 0) { |
---|
| 579 | G4cout << std::setw(12) << endVolume()->GetName() << " "; |
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| 580 | } else { |
---|
| 581 | G4cout << std::setw(12) << "OutOfWorld" << " "; |
---|
| 582 | } |
---|
| 583 | #endif |
---|
| 584 | G4cout << G4endl; |
---|
| 585 | } |
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| 586 | |
---|
| 587 | G4cout.precision(oldPrec); |
---|
| 588 | } |
---|
| 589 | |
---|
| 590 | // Main program |
---|
| 591 | // ------------------------------- |
---|
| 592 | int main(int argc, char **argv) |
---|
| 593 | { |
---|
| 594 | G4VPhysicalVolume *myTopNode; |
---|
| 595 | G4int type, optim; |
---|
| 596 | G4bool optimise=true; |
---|
| 597 | |
---|
| 598 | type = 8 ; |
---|
| 599 | |
---|
| 600 | if( argc >= 2 ) |
---|
| 601 | type = atoi(argv[1]); |
---|
| 602 | |
---|
| 603 | if( argc >=3 ){ |
---|
| 604 | optim= atoi(argv[2]); |
---|
| 605 | if( optim == 0 ) { optimise = false; } |
---|
| 606 | } |
---|
| 607 | |
---|
| 608 | G4cout << " Testing with stepper number " << type; |
---|
| 609 | G4cout << " and PiF safety optimisation " ; |
---|
| 610 | if (optimise) G4cout << "on"; |
---|
| 611 | else G4cout << "off"; |
---|
| 612 | G4cout << G4endl; |
---|
| 613 | |
---|
| 614 | // Create the geometry & field |
---|
| 615 | myTopNode=BuildGeometry(); // Build the geometry |
---|
| 616 | |
---|
| 617 | G4Navigator *pNavig= G4TransportationManager:: |
---|
| 618 | GetTransportationManager()-> GetNavigatorForTracking(); |
---|
| 619 | pNavig->SetWorldVolume(myTopNode); |
---|
| 620 | |
---|
| 621 | G4GeometryManager::GetInstance()->CloseGeometry(false); |
---|
| 622 | |
---|
| 623 | // Setup the propagator (will be overwritten by testG4Propagator ...) |
---|
| 624 | pMagFieldPropagator= SetupPropagator(type); |
---|
| 625 | G4cout << " Using default values for " |
---|
| 626 | << " Min Eps = " << pMagFieldPropagator->GetMinimumEpsilonStep() |
---|
| 627 | << " and " |
---|
| 628 | << " MaxEps = " << pMagFieldPropagator->GetMaximumEpsilonStep() |
---|
| 629 | << G4endl; |
---|
| 630 | |
---|
| 631 | pMagFieldPropagator->SetUseSafetyForOptimization(optimise); |
---|
| 632 | |
---|
| 633 | // Do the tests without voxels |
---|
| 634 | G4cout << " Test with no voxels" << G4endl; |
---|
| 635 | testG4PropagatorInField(myTopNode, type); |
---|
| 636 | |
---|
| 637 | // Repeat tests but with full voxels |
---|
| 638 | G4cout << " Test with full voxels" << G4endl; |
---|
| 639 | |
---|
| 640 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
| 641 | G4GeometryManager::GetInstance()->CloseGeometry(true); |
---|
| 642 | |
---|
| 643 | testG4PropagatorInField(myTopNode, type); |
---|
| 644 | |
---|
| 645 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
| 646 | |
---|
| 647 | G4cout << G4endl |
---|
| 648 | << "----------------------------------------------------------" |
---|
| 649 | << G4endl; |
---|
| 650 | |
---|
| 651 | // Repeat tests with full voxels and modified parameters |
---|
| 652 | G4cout << "Test with more accurate parameters " << G4endl; |
---|
| 653 | |
---|
| 654 | G4double maxEpsStep= 0.001; |
---|
| 655 | G4double minEpsStep= 2.5e-8; |
---|
| 656 | G4cout << " Setting values for Min Eps = " << minEpsStep |
---|
| 657 | << " and MaxEps = " << maxEpsStep << G4endl; |
---|
| 658 | |
---|
| 659 | pMagFieldPropagator->SetMaximumEpsilonStep(maxEpsStep); |
---|
| 660 | pMagFieldPropagator->SetMinimumEpsilonStep(minEpsStep); |
---|
| 661 | |
---|
| 662 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
| 663 | G4GeometryManager::GetInstance()->CloseGeometry(true); |
---|
| 664 | |
---|
| 665 | testG4PropagatorInField(myTopNode, type); |
---|
| 666 | |
---|
| 667 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
| 668 | |
---|
| 669 | optimise = ! optimise; |
---|
| 670 | // Repeat tests but with the opposite optimisation choice |
---|
| 671 | G4cout << " Now test with safety optimisation " ; |
---|
| 672 | if (optimise) G4cout << "on"; |
---|
| 673 | else G4cout << "off"; |
---|
| 674 | G4cout << G4endl; |
---|
| 675 | |
---|
| 676 | pMagFieldPropagator->SetUseSafetyForOptimization(optimise); |
---|
| 677 | testG4PropagatorInField(myTopNode, type); |
---|
| 678 | |
---|
| 679 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
| 680 | |
---|
| 681 | return 0; |
---|
| 682 | } |
---|
| 683 | |
---|