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: G4Transportation.cc,v 1.72.2.3 2008/11/21 18:35:15 japost Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-02 $ |
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29 | // |
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30 | // ------------------------------------------------------------ |
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31 | // GEANT 4 include file implementation |
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32 | // |
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33 | // ------------------------------------------------------------ |
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34 | // |
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35 | // This class is a process responsible for the transportation of |
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36 | // a particle, ie the geometrical propagation that encounters the |
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37 | // geometrical sub-volumes of the detectors. |
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38 | // |
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39 | // It is also tasked with the key role of proposing the "isotropic safety", |
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40 | // which will be used to update the post-step point's safety. |
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41 | // |
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42 | // ======================================================================= |
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43 | // Modified: |
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44 | // 20 Nov 2008, J.Apostolakis: Push safety to helper - after ComputeSafety |
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45 | // 9 Nov 2007, J.Apostolakis: Flag for short steps, push safety to helper |
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46 | // 19 Jan 2006, P.MoraDeFreitas: Fix for suspended tracks (StartTracking) |
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47 | // 11 Aug 2004, M.Asai: Add G4VSensitiveDetector* for updating stepPoint. |
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48 | // 21 June 2003, J.Apostolakis: Calling field manager with |
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49 | // track, to enable it to configure its accuracy |
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50 | // 13 May 2003, J.Apostolakis: Zero field areas now taken into |
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51 | // account correclty in all cases (thanks to W Pokorski). |
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52 | // 29 June 2001, J.Apostolakis, D.Cote-Ahern, P.Gumplinger: |
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53 | // correction for spin tracking |
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54 | // 20 Febr 2001, J.Apostolakis: update for new FieldTrack |
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55 | // 22 Sept 2000, V.Grichine: update of Kinetic Energy |
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56 | // Created: 19 March 1997, J. Apostolakis |
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57 | // ======================================================================= |
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58 | |
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59 | #include "G4Transportation.hh" |
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60 | #include "G4ProductionCutsTable.hh" |
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61 | #include "G4ParticleTable.hh" |
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62 | #include "G4ChordFinder.hh" |
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63 | #include "G4SafetyHelper.hh" |
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64 | #include "G4FieldManagerStore.hh" |
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65 | class G4VSensitiveDetector; |
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66 | |
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67 | ////////////////////////////////////////////////////////////////////////// |
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68 | // |
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69 | // Constructor |
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70 | |
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71 | G4Transportation::G4Transportation( G4int verboseLevel ) |
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72 | : G4VProcess( G4String("Transportation"), fTransportation ), |
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73 | fParticleIsLooping( false ), |
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74 | fPreviousSftOrigin (0.,0.,0.), |
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75 | fPreviousSafety ( 0.0 ), |
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76 | fThreshold_Warning_Energy( 100 * MeV ), |
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77 | fThreshold_Important_Energy( 250 * MeV ), |
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78 | fThresholdTrials( 10 ), |
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79 | fUnimportant_Energy( 1 * MeV ), |
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80 | fNoLooperTrials(0), |
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81 | fSumEnergyKilled( 0.0 ), fMaxEnergyKilled( 0.0 ), |
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82 | fShortStepOptimisation(false), // Old default: true (=fast short steps) |
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83 | fVerboseLevel( verboseLevel ) |
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84 | { |
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85 | G4TransportationManager* transportMgr ; |
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86 | |
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87 | transportMgr = G4TransportationManager::GetTransportationManager() ; |
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88 | |
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89 | fLinearNavigator = transportMgr->GetNavigatorForTracking() ; |
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90 | |
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91 | // fGlobalFieldMgr = transportMgr->GetFieldManager() ; |
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92 | |
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93 | fFieldPropagator = transportMgr->GetPropagatorInField() ; |
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94 | |
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95 | fpSafetyHelper = transportMgr->GetSafetyHelper(); // New |
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96 | |
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97 | // Cannot determine whether a field exists here, |
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98 | // because it would only work if the field manager has informed |
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99 | // about the detector's field before this transportation process |
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100 | // is constructed. |
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101 | // Instead later the method DoesGlobalFieldExist() is called |
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102 | |
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103 | static G4TouchableHandle nullTouchableHandle; // Points to (G4VTouchable*) 0 |
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104 | fCurrentTouchableHandle = nullTouchableHandle; |
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105 | |
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106 | fEndGlobalTimeComputed = false; |
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107 | fCandidateEndGlobalTime = 0; |
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108 | } |
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109 | |
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110 | ////////////////////////////////////////////////////////////////////////// |
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111 | |
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112 | G4Transportation::~G4Transportation() |
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113 | { |
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114 | if( (fVerboseLevel > 0) && (fSumEnergyKilled > 0.0 ) ){ |
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115 | G4cout << " G4Transportation: Statistics for looping particles " << G4endl; |
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116 | G4cout << " Sum of energy of loopers killed: " << fSumEnergyKilled << G4endl; |
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117 | G4cout << " Max energy of loopers killed: " << fMaxEnergyKilled << G4endl; |
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118 | } |
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119 | } |
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120 | |
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121 | ////////////////////////////////////////////////////////////////////////// |
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122 | // |
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123 | // Responsibilities: |
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124 | // Find whether the geometry limits the Step, and to what length |
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125 | // Calculate the new value of the safety and return it. |
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126 | // Store the final time, position and momentum. |
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127 | |
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128 | G4double G4Transportation:: |
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129 | AlongStepGetPhysicalInteractionLength( const G4Track& track, |
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130 | G4double, // previousStepSize |
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131 | G4double currentMinimumStep, |
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132 | G4double& currentSafety, |
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133 | G4GPILSelection* selection ) |
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134 | { |
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135 | G4double geometryStepLength, newSafety ; |
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136 | fParticleIsLooping = false ; |
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137 | |
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138 | // Initial actions moved to StartTrack() |
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139 | // -------------------------------------- |
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140 | // Note: in case another process changes touchable handle |
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141 | // it will be necessary to add here (for all steps) |
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142 | // fCurrentTouchableHandle = aTrack->GetTouchableHandle(); |
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143 | |
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144 | // GPILSelection is set to defaule value of CandidateForSelection |
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145 | // It is a return value |
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146 | // |
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147 | *selection = CandidateForSelection ; |
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148 | |
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149 | // Get initial Energy/Momentum of the track |
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150 | // |
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151 | const G4DynamicParticle* pParticle = track.GetDynamicParticle() ; |
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152 | const G4ParticleDefinition* pParticleDef = pParticle->GetDefinition() ; |
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153 | G4ThreeVector startMomentumDir = pParticle->GetMomentumDirection() ; |
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154 | G4ThreeVector startPosition = track.GetPosition() ; |
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155 | |
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156 | // G4double theTime = track.GetGlobalTime() ; |
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157 | |
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158 | // The Step Point safety can be limited by other geometries and/or the |
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159 | // assumptions of any process - it's not always the geometrical safety. |
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160 | // We calculate the starting point's isotropic safety here. |
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161 | // |
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162 | G4ThreeVector OriginShift = startPosition - fPreviousSftOrigin ; |
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163 | G4double MagSqShift = OriginShift.mag2() ; |
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164 | if( MagSqShift >= sqr(fPreviousSafety) ) |
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165 | { |
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166 | currentSafety = 0.0 ; |
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167 | } |
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168 | else |
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169 | { |
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170 | currentSafety = fPreviousSafety - std::sqrt(MagSqShift) ; |
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171 | } |
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172 | |
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173 | // Is the particle charged ? |
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174 | // |
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175 | G4double particleCharge = pParticle->GetCharge() ; |
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176 | |
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177 | fGeometryLimitedStep = false ; |
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178 | // fEndGlobalTimeComputed = false ; |
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179 | |
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180 | // There is no need to locate the current volume. It is Done elsewhere: |
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181 | // On track construction |
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182 | // By the tracking, after all AlongStepDoIts, in "Relocation" |
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183 | |
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184 | // Check whether the particle have an (EM) field force exerting upon it |
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185 | // |
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186 | G4FieldManager* fieldMgr=0; |
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187 | G4bool fieldExertsForce = false ; |
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188 | if( (particleCharge != 0.0) ) |
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189 | { |
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190 | fieldMgr= fFieldPropagator->FindAndSetFieldManager( track.GetVolume() ); |
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191 | if (fieldMgr != 0) { |
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192 | // Message the field Manager, to configure it for this track |
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193 | fieldMgr->ConfigureForTrack( &track ); |
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194 | // Moved here, in order to allow a transition |
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195 | // from a zero-field status (with fieldMgr->(field)0 |
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196 | // to a finite field status |
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197 | |
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198 | // If the field manager has no field, there is no field ! |
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199 | fieldExertsForce = (fieldMgr->GetDetectorField() != 0); |
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200 | } |
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201 | } |
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202 | |
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203 | // G4cout << " G4Transport: field exerts force= " << fieldExertsForce |
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204 | // << " fieldMgr= " << fieldMgr << G4endl; |
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205 | |
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206 | // Choose the calculation of the transportation: Field or not |
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207 | // |
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208 | if( !fieldExertsForce ) |
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209 | { |
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210 | G4double linearStepLength ; |
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211 | if( fShortStepOptimisation && (currentMinimumStep <= currentSafety) ) |
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212 | { |
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213 | // The Step is guaranteed to be taken |
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214 | // |
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215 | geometryStepLength = currentMinimumStep ; |
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216 | fGeometryLimitedStep = false ; |
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217 | } |
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218 | else |
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219 | { |
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220 | // Find whether the straight path intersects a volume |
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221 | // |
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222 | linearStepLength = fLinearNavigator->ComputeStep( startPosition, |
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223 | startMomentumDir, |
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224 | currentMinimumStep, |
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225 | newSafety) ; |
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226 | // Remember last safety origin & value. |
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227 | // |
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228 | fPreviousSftOrigin = startPosition ; |
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229 | fPreviousSafety = newSafety ; |
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230 | // fpSafetyHelper->SetCurrentSafety( newSafety, startPosition); |
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231 | |
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232 | // The safety at the initial point has been re-calculated: |
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233 | // |
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234 | currentSafety = newSafety ; |
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235 | |
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236 | fGeometryLimitedStep= (linearStepLength <= currentMinimumStep); |
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237 | if( fGeometryLimitedStep ) |
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238 | { |
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239 | // The geometry limits the Step size (an intersection was found.) |
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240 | geometryStepLength = linearStepLength ; |
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241 | } |
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242 | else |
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243 | { |
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244 | // The full Step is taken. |
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245 | geometryStepLength = currentMinimumStep ; |
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246 | } |
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247 | } |
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248 | endpointDistance = geometryStepLength ; |
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249 | |
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250 | // Calculate final position |
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251 | // |
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252 | fTransportEndPosition = startPosition+geometryStepLength*startMomentumDir ; |
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253 | |
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254 | // Momentum direction, energy and polarisation are unchanged by transport |
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255 | // |
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256 | fTransportEndMomentumDir = startMomentumDir ; |
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257 | fTransportEndKineticEnergy = track.GetKineticEnergy() ; |
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258 | fTransportEndSpin = track.GetPolarization(); |
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259 | fParticleIsLooping = false ; |
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260 | fMomentumChanged = false ; |
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261 | fEndGlobalTimeComputed = false ; |
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262 | } |
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263 | else // A field exerts force |
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264 | { |
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265 | G4double momentumMagnitude = pParticle->GetTotalMomentum() ; |
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266 | G4ThreeVector EndUnitMomentum ; |
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267 | G4double lengthAlongCurve ; |
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268 | G4double restMass = pParticleDef->GetPDGMass() ; |
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269 | |
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270 | fFieldPropagator->SetChargeMomentumMass( particleCharge, // in e+ units |
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271 | momentumMagnitude, // in Mev/c |
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272 | restMass ) ; |
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273 | |
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274 | G4ThreeVector spin = track.GetPolarization() ; |
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275 | G4FieldTrack aFieldTrack = G4FieldTrack( startPosition, |
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276 | track.GetMomentumDirection(), |
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277 | 0.0, |
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278 | track.GetKineticEnergy(), |
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279 | restMass, |
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280 | track.GetVelocity(), |
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281 | track.GetGlobalTime(), // Lab. |
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282 | track.GetProperTime(), // Part. |
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283 | &spin ) ; |
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284 | if( currentMinimumStep > 0 ) |
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285 | { |
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286 | // Do the Transport in the field (non recti-linear) |
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287 | // |
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288 | lengthAlongCurve = fFieldPropagator->ComputeStep( aFieldTrack, |
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289 | currentMinimumStep, |
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290 | currentSafety, |
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291 | track.GetVolume() ) ; |
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292 | fGeometryLimitedStep= lengthAlongCurve < currentMinimumStep; |
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293 | if( fGeometryLimitedStep ) { |
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294 | geometryStepLength = lengthAlongCurve ; |
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295 | } else { |
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296 | geometryStepLength = currentMinimumStep ; |
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297 | } |
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298 | } |
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299 | else |
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300 | { |
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301 | geometryStepLength = lengthAlongCurve= 0.0 ; |
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302 | fGeometryLimitedStep = false ; |
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303 | } |
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304 | |
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305 | // Remember last safety origin & value. |
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306 | // |
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307 | fPreviousSftOrigin = startPosition ; |
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308 | fPreviousSafety = currentSafety ; |
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309 | // fpSafetyHelper->SetCurrentSafety( newSafety, startPosition); |
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310 | |
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311 | // Get the End-Position and End-Momentum (Dir-ection) |
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312 | // |
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313 | fTransportEndPosition = aFieldTrack.GetPosition() ; |
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314 | |
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315 | // Momentum: Magnitude and direction can be changed too now ... |
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316 | // |
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317 | fMomentumChanged = true ; |
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318 | fTransportEndMomentumDir = aFieldTrack.GetMomentumDir() ; |
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319 | |
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320 | fTransportEndKineticEnergy = aFieldTrack.GetKineticEnergy() ; |
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321 | |
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322 | if( fFieldPropagator->GetCurrentFieldManager()->DoesFieldChangeEnergy() ) |
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323 | { |
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324 | // If the field can change energy, then the time must be integrated |
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325 | // - so this should have been updated |
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326 | // |
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327 | fCandidateEndGlobalTime = aFieldTrack.GetLabTimeOfFlight(); |
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328 | fEndGlobalTimeComputed = true; |
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329 | |
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330 | // was ( fCandidateEndGlobalTime != track.GetGlobalTime() ); |
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331 | // a cleaner way is to have FieldTrack knowing whether time is updated. |
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332 | } |
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333 | else |
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334 | { |
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335 | // The energy should be unchanged by field transport, |
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336 | // - so the time changed will be calculated elsewhere |
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337 | // |
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338 | fEndGlobalTimeComputed = false; |
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339 | |
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340 | // Check that the integration preserved the energy |
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341 | // - and if not correct this! |
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342 | G4double startEnergy= track.GetKineticEnergy(); |
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343 | G4double endEnergy= fTransportEndKineticEnergy; |
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344 | |
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345 | static G4int no_inexact_steps=0, no_large_ediff; |
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346 | G4double absEdiff = std::fabs(startEnergy- endEnergy); |
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347 | if( absEdiff > perMillion * endEnergy ) |
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348 | { |
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349 | no_inexact_steps++; |
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350 | // Possible statistics keeping here ... |
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351 | } |
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352 | if( fVerboseLevel > 1 ) |
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353 | { |
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354 | if( std::fabs(startEnergy- endEnergy) > perThousand * endEnergy ) |
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355 | { |
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356 | static G4int no_warnings= 0, warnModulo=1, moduloFactor= 10; |
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357 | no_large_ediff ++; |
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358 | if( (no_large_ediff% warnModulo) == 0 ) |
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359 | { |
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360 | no_warnings++; |
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361 | G4cout << "WARNING - G4Transportation::AlongStepGetPIL() " |
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362 | << " Energy change in Step is above 1^-3 relative value. " << G4endl |
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363 | << " Relative change in 'tracking' step = " |
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364 | << std::setw(15) << (endEnergy-startEnergy)/startEnergy << G4endl |
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365 | << " Starting E= " << std::setw(12) << startEnergy / MeV << " MeV " << G4endl |
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366 | << " Ending E= " << std::setw(12) << endEnergy / MeV << " MeV " << G4endl; |
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367 | G4cout << " Energy has been corrected -- however, review" |
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368 | << " field propagation parameters for accuracy." << G4endl; |
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369 | if( (fVerboseLevel > 2 ) || (no_warnings<4) || (no_large_ediff == warnModulo * moduloFactor) ){ |
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370 | G4cout << " These include EpsilonStepMax(/Min) in G4FieldManager " |
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371 | << " which determine fractional error per step for integrated quantities. " << G4endl |
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372 | << " Note also the influence of the permitted number of integration steps." |
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373 | << G4endl; |
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374 | } |
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375 | G4cerr << "ERROR - G4Transportation::AlongStepGetPIL()" << G4endl |
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376 | << " Bad 'endpoint'. Energy change detected" |
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377 | << " and corrected. " |
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378 | << " Has occurred already " |
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379 | << no_large_ediff << " times." << G4endl; |
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380 | if( no_large_ediff == warnModulo * moduloFactor ) |
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381 | { |
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382 | warnModulo *= moduloFactor; |
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383 | } |
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384 | } |
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385 | } |
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386 | } // end of if (fVerboseLevel) |
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387 | |
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388 | // Correct the energy for fields that conserve it |
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389 | // This - hides the integration error |
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390 | // - but gives a better physical answer |
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391 | fTransportEndKineticEnergy= track.GetKineticEnergy(); |
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392 | } |
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393 | |
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394 | fTransportEndSpin = aFieldTrack.GetSpin(); |
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395 | fParticleIsLooping = fFieldPropagator->IsParticleLooping() ; |
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396 | endpointDistance = (fTransportEndPosition - startPosition).mag() ; |
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397 | } |
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398 | |
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399 | // If we are asked to go a step length of 0, and we are on a boundary |
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400 | // then a boundary will also limit the step -> we must flag this. |
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401 | // |
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402 | if( currentMinimumStep == 0.0 ) |
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403 | { |
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404 | if( currentSafety == 0.0 ) fGeometryLimitedStep = true ; |
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405 | } |
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406 | |
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407 | // Update the safety starting from the end-point, |
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408 | // if it will become negative at the end-point. |
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409 | // |
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410 | if( currentSafety < endpointDistance ) |
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411 | { |
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412 | // if( particleCharge == 0.0 ) |
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413 | // G4cout << " Avoiding call to ComputeSafety : charge = 0.0 " << G4endl; |
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414 | |
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415 | if( particleCharge != 0.0 ) { |
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416 | |
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417 | G4double endSafety = |
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418 | fLinearNavigator->ComputeSafety( fTransportEndPosition) ; |
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419 | currentSafety = endSafety ; |
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420 | fPreviousSftOrigin = fTransportEndPosition ; |
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421 | fPreviousSafety = currentSafety ; |
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422 | fpSafetyHelper->SetCurrentSafety( currentSafety, fTransportEndPosition); |
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423 | |
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424 | // Because the Stepping Manager assumes it is from the start point, |
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425 | // add the StepLength |
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426 | // |
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427 | currentSafety += endpointDistance ; |
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428 | |
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429 | #ifdef G4DEBUG_TRANSPORT |
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430 | G4cout.precision(12) ; |
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431 | G4cout << "***G4Transportation::AlongStepGPIL ** " << G4endl ; |
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432 | G4cout << " Called Navigator->ComputeSafety at " << fTransportEndPosition |
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433 | << " and it returned safety= " << endSafety << G4endl ; |
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434 | G4cout << " Adding endpoint distance " << endpointDistance |
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435 | << " to obtain pseudo-safety= " << currentSafety << G4endl ; |
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436 | #endif |
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437 | } |
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438 | } |
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439 | |
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440 | fParticleChange.ProposeTrueStepLength(geometryStepLength) ; |
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441 | |
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442 | return geometryStepLength ; |
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443 | } |
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444 | |
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445 | ////////////////////////////////////////////////////////////////////////// |
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446 | // |
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447 | // Initialize ParticleChange (by setting all its members equal |
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448 | // to corresponding members in G4Track) |
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449 | |
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450 | G4VParticleChange* G4Transportation::AlongStepDoIt( const G4Track& track, |
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451 | const G4Step& stepData ) |
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452 | { |
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453 | static G4int noCalls=0; |
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454 | static const G4ParticleDefinition* fOpticalPhoton = |
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455 | G4ParticleTable::GetParticleTable()->FindParticle("opticalphoton"); |
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456 | |
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457 | noCalls++; |
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458 | |
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459 | fParticleChange.Initialize(track) ; |
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460 | |
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461 | // Code for specific process |
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462 | // |
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463 | fParticleChange.ProposePosition(fTransportEndPosition) ; |
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464 | fParticleChange.ProposeMomentumDirection(fTransportEndMomentumDir) ; |
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465 | fParticleChange.ProposeEnergy(fTransportEndKineticEnergy) ; |
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466 | fParticleChange.SetMomentumChanged(fMomentumChanged) ; |
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467 | |
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468 | fParticleChange.ProposePolarization(fTransportEndSpin); |
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469 | |
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470 | G4double deltaTime = 0.0 ; |
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471 | |
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472 | // Calculate Lab Time of Flight (ONLY if field Equations used it!) |
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473 | // G4double endTime = fCandidateEndGlobalTime; |
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474 | // G4double delta_time = endTime - startTime; |
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475 | |
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476 | G4double startTime = track.GetGlobalTime() ; |
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477 | |
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478 | if (!fEndGlobalTimeComputed) |
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479 | { |
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480 | // The time was not integrated .. make the best estimate possible |
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481 | // |
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482 | G4double finalVelocity = track.GetVelocity() ; |
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483 | G4double initialVelocity = stepData.GetPreStepPoint()->GetVelocity() ; |
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484 | G4double stepLength = track.GetStepLength() ; |
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485 | |
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486 | deltaTime= 0.0; // in case initialVelocity = 0 |
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487 | const G4DynamicParticle* fpDynamicParticle = track.GetDynamicParticle(); |
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488 | if (fpDynamicParticle->GetDefinition()== fOpticalPhoton) |
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489 | { |
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490 | // A photon is in the medium of the final point |
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491 | // during the step, so it has the final velocity. |
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492 | deltaTime = stepLength/finalVelocity ; |
---|
493 | } |
---|
494 | else if (finalVelocity > 0.0) |
---|
495 | { |
---|
496 | G4double meanInverseVelocity ; |
---|
497 | // deltaTime = stepLength/finalVelocity ; |
---|
498 | meanInverseVelocity = 0.5 |
---|
499 | * ( 1.0 / initialVelocity + 1.0 / finalVelocity ) ; |
---|
500 | deltaTime = stepLength * meanInverseVelocity ; |
---|
501 | } |
---|
502 | else if( initialVelocity > 0.0 ) |
---|
503 | { |
---|
504 | deltaTime = stepLength/initialVelocity ; |
---|
505 | } |
---|
506 | fCandidateEndGlobalTime = startTime + deltaTime ; |
---|
507 | } |
---|
508 | else |
---|
509 | { |
---|
510 | deltaTime = fCandidateEndGlobalTime - startTime ; |
---|
511 | } |
---|
512 | |
---|
513 | fParticleChange.ProposeGlobalTime( fCandidateEndGlobalTime ) ; |
---|
514 | |
---|
515 | // Now Correct by Lorentz factor to get "proper" deltaTime |
---|
516 | |
---|
517 | G4double restMass = track.GetDynamicParticle()->GetMass() ; |
---|
518 | G4double deltaProperTime = deltaTime*( restMass/track.GetTotalEnergy() ) ; |
---|
519 | |
---|
520 | fParticleChange.ProposeProperTime(track.GetProperTime() + deltaProperTime) ; |
---|
521 | //fParticleChange. ProposeTrueStepLength( track.GetStepLength() ) ; |
---|
522 | |
---|
523 | // If the particle is caught looping or is stuck (in very difficult |
---|
524 | // boundaries) in a magnetic field (doing many steps) |
---|
525 | // THEN this kills it ... |
---|
526 | // |
---|
527 | if ( fParticleIsLooping ) |
---|
528 | { |
---|
529 | G4double endEnergy= fTransportEndKineticEnergy; |
---|
530 | |
---|
531 | if( (endEnergy < fThreshold_Important_Energy) |
---|
532 | || (fNoLooperTrials >= fThresholdTrials ) ){ |
---|
533 | // Kill the looping particle |
---|
534 | // |
---|
535 | fParticleChange.ProposeTrackStatus( fStopAndKill ) ; |
---|
536 | |
---|
537 | // 'Bare' statistics |
---|
538 | fSumEnergyKilled += endEnergy; |
---|
539 | if( endEnergy > fMaxEnergyKilled) { fMaxEnergyKilled= endEnergy; } |
---|
540 | |
---|
541 | #ifdef G4VERBOSE |
---|
542 | if( (fVerboseLevel > 1) || |
---|
543 | ( endEnergy > fThreshold_Warning_Energy ) ) { |
---|
544 | G4cout << " G4Transportation is killing track that is looping or stuck " |
---|
545 | << G4endl |
---|
546 | << " This track has " << track.GetKineticEnergy() / MeV |
---|
547 | << " MeV energy." << G4endl; |
---|
548 | G4cout << " Number of trials = " << fNoLooperTrials |
---|
549 | << " No of calls to AlongStepDoIt = " << noCalls |
---|
550 | << G4endl; |
---|
551 | } |
---|
552 | #endif |
---|
553 | fNoLooperTrials=0; |
---|
554 | } |
---|
555 | else{ |
---|
556 | fNoLooperTrials ++; |
---|
557 | #ifdef G4VERBOSE |
---|
558 | if( (fVerboseLevel > 2) ){ |
---|
559 | G4cout << " G4Transportation::AlongStepDoIt(): Particle looping - " |
---|
560 | << " Number of trials = " << fNoLooperTrials |
---|
561 | << " No of calls to = " << noCalls |
---|
562 | << G4endl; |
---|
563 | } |
---|
564 | #endif |
---|
565 | } |
---|
566 | }else{ |
---|
567 | fNoLooperTrials=0; |
---|
568 | } |
---|
569 | |
---|
570 | // Another (sometimes better way) is to use a user-limit maximum Step size |
---|
571 | // to alleviate this problem .. |
---|
572 | |
---|
573 | // Introduce smooth curved trajectories to particle-change |
---|
574 | // |
---|
575 | fParticleChange.SetPointerToVectorOfAuxiliaryPoints |
---|
576 | (fFieldPropagator->GimmeTrajectoryVectorAndForgetIt() ); |
---|
577 | |
---|
578 | return &fParticleChange ; |
---|
579 | } |
---|
580 | |
---|
581 | ////////////////////////////////////////////////////////////////////////// |
---|
582 | // |
---|
583 | // This ensures that the PostStep action is always called, |
---|
584 | // so that it can do the relocation if it is needed. |
---|
585 | // |
---|
586 | |
---|
587 | G4double G4Transportation:: |
---|
588 | PostStepGetPhysicalInteractionLength( const G4Track&, |
---|
589 | G4double, // previousStepSize |
---|
590 | G4ForceCondition* pForceCond ) |
---|
591 | { |
---|
592 | *pForceCond = Forced ; |
---|
593 | return DBL_MAX ; // was kInfinity ; but convention now is DBL_MAX |
---|
594 | } |
---|
595 | |
---|
596 | ///////////////////////////////////////////////////////////////////////////// |
---|
597 | // |
---|
598 | |
---|
599 | G4VParticleChange* G4Transportation::PostStepDoIt( const G4Track& track, |
---|
600 | const G4Step& ) |
---|
601 | { |
---|
602 | G4TouchableHandle retCurrentTouchable ; // The one to return |
---|
603 | |
---|
604 | // Initialize ParticleChange (by setting all its members equal |
---|
605 | // to corresponding members in G4Track) |
---|
606 | // fParticleChange.Initialize(track) ; // To initialise TouchableChange |
---|
607 | |
---|
608 | fParticleChange.ProposeTrackStatus(track.GetTrackStatus()) ; |
---|
609 | |
---|
610 | // If the Step was determined by the volume boundary, |
---|
611 | // logically relocate the particle |
---|
612 | |
---|
613 | if(fGeometryLimitedStep) |
---|
614 | { |
---|
615 | // fCurrentTouchable will now become the previous touchable, |
---|
616 | // and what was the previous will be freed. |
---|
617 | // (Needed because the preStepPoint can point to the previous touchable) |
---|
618 | |
---|
619 | fLinearNavigator->SetGeometricallyLimitedStep() ; |
---|
620 | fLinearNavigator-> |
---|
621 | LocateGlobalPointAndUpdateTouchableHandle( track.GetPosition(), |
---|
622 | track.GetMomentumDirection(), |
---|
623 | fCurrentTouchableHandle, |
---|
624 | true ) ; |
---|
625 | // Check whether the particle is out of the world volume |
---|
626 | // If so it has exited and must be killed. |
---|
627 | // |
---|
628 | if( fCurrentTouchableHandle->GetVolume() == 0 ) |
---|
629 | { |
---|
630 | fParticleChange.ProposeTrackStatus( fStopAndKill ) ; |
---|
631 | } |
---|
632 | retCurrentTouchable = fCurrentTouchableHandle ; |
---|
633 | fParticleChange.SetTouchableHandle( fCurrentTouchableHandle ) ; |
---|
634 | } |
---|
635 | else // fGeometryLimitedStep is false |
---|
636 | { |
---|
637 | // This serves only to move the Navigator's location |
---|
638 | // |
---|
639 | fLinearNavigator->LocateGlobalPointWithinVolume( track.GetPosition() ) ; |
---|
640 | |
---|
641 | // The value of the track's current Touchable is retained. |
---|
642 | // (and it must be correct because we must use it below to |
---|
643 | // overwrite the (unset) one in particle change) |
---|
644 | // It must be fCurrentTouchable too ?? |
---|
645 | // |
---|
646 | fParticleChange.SetTouchableHandle( track.GetTouchableHandle() ) ; |
---|
647 | retCurrentTouchable = track.GetTouchableHandle() ; |
---|
648 | } // endif ( fGeometryLimitedStep ) |
---|
649 | |
---|
650 | const G4VPhysicalVolume* pNewVol = retCurrentTouchable->GetVolume() ; |
---|
651 | const G4Material* pNewMaterial = 0 ; |
---|
652 | const G4VSensitiveDetector* pNewSensitiveDetector = 0 ; |
---|
653 | |
---|
654 | if( pNewVol != 0 ) |
---|
655 | { |
---|
656 | pNewMaterial= pNewVol->GetLogicalVolume()->GetMaterial(); |
---|
657 | pNewSensitiveDetector= pNewVol->GetLogicalVolume()->GetSensitiveDetector(); |
---|
658 | } |
---|
659 | |
---|
660 | // ( <const_cast> pNewMaterial ) ; |
---|
661 | // ( <const_cast> pNewSensitiveDetector) ; |
---|
662 | |
---|
663 | fParticleChange.SetMaterialInTouchable( (G4Material *) pNewMaterial ) ; |
---|
664 | fParticleChange.SetSensitiveDetectorInTouchable( (G4VSensitiveDetector *) pNewSensitiveDetector ) ; |
---|
665 | |
---|
666 | const G4MaterialCutsCouple* pNewMaterialCutsCouple = 0; |
---|
667 | if( pNewVol != 0 ) |
---|
668 | { |
---|
669 | pNewMaterialCutsCouple=pNewVol->GetLogicalVolume()->GetMaterialCutsCouple(); |
---|
670 | } |
---|
671 | |
---|
672 | if( pNewVol!=0 && pNewMaterialCutsCouple!=0 && pNewMaterialCutsCouple->GetMaterial()!=pNewMaterial ) |
---|
673 | { |
---|
674 | // for parametrized volume |
---|
675 | // |
---|
676 | pNewMaterialCutsCouple = |
---|
677 | G4ProductionCutsTable::GetProductionCutsTable() |
---|
678 | ->GetMaterialCutsCouple(pNewMaterial, |
---|
679 | pNewMaterialCutsCouple->GetProductionCuts()); |
---|
680 | } |
---|
681 | fParticleChange.SetMaterialCutsCoupleInTouchable( pNewMaterialCutsCouple ); |
---|
682 | |
---|
683 | // temporarily until Get/Set Material of ParticleChange, |
---|
684 | // and StepPoint can be made const. |
---|
685 | // Set the touchable in ParticleChange |
---|
686 | // this must always be done because the particle change always |
---|
687 | // uses this value to overwrite the current touchable pointer. |
---|
688 | // |
---|
689 | fParticleChange.SetTouchableHandle(retCurrentTouchable) ; |
---|
690 | |
---|
691 | return &fParticleChange ; |
---|
692 | } |
---|
693 | |
---|
694 | // New method takes over the responsibility to reset the state of G4Transportation |
---|
695 | // object at the start of a new track or the resumption of a suspended track. |
---|
696 | |
---|
697 | void |
---|
698 | G4Transportation::StartTracking(G4Track* aTrack) |
---|
699 | { |
---|
700 | G4VProcess::StartTracking(aTrack); |
---|
701 | |
---|
702 | // The actions here are those that were taken in AlongStepGPIL |
---|
703 | // when track.GetCurrentStepNumber()==1 |
---|
704 | |
---|
705 | // reset safety value and center |
---|
706 | // |
---|
707 | fPreviousSafety = 0.0 ; |
---|
708 | fPreviousSftOrigin = G4ThreeVector(0.,0.,0.) ; |
---|
709 | |
---|
710 | // reset looping counter -- for motion in field |
---|
711 | fNoLooperTrials= 0; |
---|
712 | // Must clear this state .. else it depends on last track's value |
---|
713 | // --> a better solution would set this from state of suspended track TODO ? |
---|
714 | // Was if( aTrack->GetCurrentStepNumber()==1 ) { .. } |
---|
715 | |
---|
716 | // ChordFinder reset internal state |
---|
717 | // |
---|
718 | if( DoesGlobalFieldExist() ) { |
---|
719 | fFieldPropagator->ClearPropagatorState(); |
---|
720 | // Resets all state of field propagator class (ONLY) |
---|
721 | // including safety values (in case of overlaps and to wipe for first track). |
---|
722 | |
---|
723 | // G4ChordFinder* chordF= fFieldPropagator->GetChordFinder(); |
---|
724 | // if( chordF ) chordF->ResetStepEstimate(); |
---|
725 | } |
---|
726 | |
---|
727 | // Make sure to clear the chord finders of all fields (ie managers) |
---|
728 | static G4FieldManagerStore* fieldMgrStore= G4FieldManagerStore::GetInstance(); |
---|
729 | fieldMgrStore->ClearAllChordFindersState(); |
---|
730 | |
---|
731 | // Update the current touchable handle (from the track's) |
---|
732 | // |
---|
733 | fCurrentTouchableHandle = aTrack->GetTouchableHandle(); |
---|
734 | } |
---|
735 | |
---|