[819] | 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 | // $Id: G4UrbanMscModel.hh,v 1.31 2007/10/29 08:42:43 vnivanch Exp $ |
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| 27 | // GEANT4 tag $Name: geant4-09-01-patch-02 $ |
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| 28 | // |
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| 29 | // ------------------------------------------------------------------- |
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| 30 | // |
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| 31 | // |
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| 32 | // GEANT4 Class header file |
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| 33 | // |
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| 34 | // |
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| 35 | // File name: G4UrbanMscModel |
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| 36 | // |
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| 37 | // Author: Laszlo Urban |
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| 38 | // |
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| 39 | // Creation date: 01.03.2001 |
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| 40 | // |
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| 41 | // Modifications: |
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| 42 | // |
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| 43 | // 27-03-03 Move model part from G4MultipleScattering (V.Ivanchenko) |
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| 44 | // 27-03-03 Rename (V.Ivanchenko) |
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| 45 | // |
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| 46 | // 05-08-03 angle distribution has been modified (L.Urban) |
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| 47 | // 26-11-03 new data member currentRange (L.Urban) |
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| 48 | // 01-03-04 changes in data members + signature changed in SampleCosineTheta |
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| 49 | // 11-03-04 changes in data members (L.Urban) |
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| 50 | // 23-04-04 changes in data members and in signature of SampleCosineTheta |
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| 51 | // (L.Urban) |
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| 52 | // 17-08-04 name of data member facxsi changed to factail (L.Urban) |
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| 53 | // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko) |
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| 54 | // 15-04-05 optimize internal interface - add SampleSecondaries method (V.Ivanchenko) |
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| 55 | // 11-08-05 computation of lateral correlation added (L.Urban) |
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| 56 | // 02-10-05 nuclear size correction computation removed, the correction |
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| 57 | // included in the (theoretical) tabulated values (L.Urban) |
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| 58 | // 16-02-06 data members b and xsi have been removed (L.Urban) |
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| 59 | // 17-02-06 Save table of transport cross sections not mfp (V.Ivanchenko) |
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| 60 | // 07-03-06 Create G4UrbanMscModel and move there step limit calculation (V.Ivanchenko) |
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| 61 | // 10-05-06 SetMscStepLimitation at initialisation (V.Ivantchenko) |
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| 62 | // 11-05-06 name of data member safety changed to presafety, some new data |
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| 63 | // members added (frscaling1,frscaling2,tlimitminfix,nstepmax) |
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| 64 | // (L.Urban) |
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| 65 | // 13-10-06 data member factail removed, data member tkinlimit changed |
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| 66 | // to lambdalimit, |
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| 67 | // new data members tgeom,tnow,skin,skindepth,Zeff,geomlimit |
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| 68 | // G4double GeomLimit(const G4Track& track) changed to |
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| 69 | // void GeomLimit(const G4Track& track) (L.Urban) |
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| 70 | // 20-10-06 parameter theta0 now computed in the (public) |
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| 71 | // function ComputeTheta0, |
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| 72 | // single scattering modified allowing not small |
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| 73 | // angles as well (L.Urban) |
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| 74 | // 31-01-07 code cleaning (L.Urban) |
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| 75 | // 06-02-07 Move SetMscStepLimitation method into the source (VI) |
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| 76 | // 15-02-07 new data member : smallstep (L.Urban) |
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| 77 | // 10-04-07 remove navigator, smallstep, tnow (V.Ivanchenko) |
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| 78 | // |
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| 79 | // |
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| 80 | // Class Description: |
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| 81 | // |
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| 82 | // Implementation of the model of multiple scattering based on |
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| 83 | // H.W.Lewis Phys Rev 78 (1950) 526 and L.Urban model |
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| 84 | |
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| 85 | // ------------------------------------------------------------------- |
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| 86 | // |
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| 87 | |
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| 88 | #ifndef G4UrbanMscModel_h |
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| 89 | #define G4UrbanMscModel_h 1 |
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| 90 | |
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| 91 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 92 | |
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| 93 | #include "G4VEmModel.hh" |
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| 94 | #include "G4PhysicsTable.hh" |
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| 95 | #include "G4MscStepLimitType.hh" |
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| 96 | |
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| 97 | class G4ParticleChangeForMSC; |
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| 98 | class G4SafetyHelper; |
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| 99 | class G4LossTableManager; |
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| 100 | |
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| 101 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 102 | |
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| 103 | class G4UrbanMscModel : public G4VEmModel |
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| 104 | { |
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| 105 | |
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| 106 | public: |
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| 107 | |
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| 108 | G4UrbanMscModel(G4double facrange, G4double dtrl, G4double lambdalimit, |
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| 109 | G4double facgeom,G4double skin, |
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| 110 | G4bool samplez, G4MscStepLimitType stepAlg, |
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| 111 | const G4String& nam = "UrbanMscUni"); |
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| 112 | |
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| 113 | virtual ~G4UrbanMscModel(); |
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| 114 | |
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| 115 | virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&); |
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| 116 | |
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| 117 | G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle, |
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| 118 | G4double KineticEnergy, |
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| 119 | G4double AtomicNumber, |
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| 120 | G4double AtomicWeight=0., |
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| 121 | G4double cut =0., |
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| 122 | G4double emax=DBL_MAX); |
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| 123 | |
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| 124 | void SampleSecondaries(std::vector<G4DynamicParticle*>*, |
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| 125 | const G4MaterialCutsCouple*, |
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| 126 | const G4DynamicParticle*, |
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| 127 | G4double, |
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| 128 | G4double); |
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| 129 | |
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| 130 | void SampleScattering(const G4DynamicParticle*, |
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| 131 | G4double safety); |
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| 132 | |
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| 133 | G4double ComputeTruePathLengthLimit(const G4Track& track, |
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| 134 | G4PhysicsTable* theLambdaTable, |
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| 135 | G4double currentMinimalStep); |
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| 136 | |
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| 137 | G4double ComputeGeomPathLength(G4double truePathLength); |
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| 138 | |
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| 139 | G4double ComputeTrueStepLength(G4double geomStepLength); |
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| 140 | |
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| 141 | G4double ComputeTheta0(G4double truePathLength, |
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| 142 | G4double KineticEnergy); |
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| 143 | |
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| 144 | void SetStepLimitType(G4MscStepLimitType); |
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| 145 | |
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| 146 | void SetLateralDisplasmentFlag(G4bool val); |
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| 147 | |
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| 148 | void SetRangeFactor(G4double); |
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| 149 | |
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| 150 | void SetGeomFactor(G4double); |
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| 151 | |
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| 152 | void SetSkin(G4double); |
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| 153 | |
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| 154 | private: |
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| 155 | |
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| 156 | G4double SampleCosineTheta(G4double trueStepLength, G4double KineticEnergy); |
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| 157 | |
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| 158 | G4double SampleDisplacement(); |
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| 159 | |
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| 160 | G4double LatCorrelation(); |
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| 161 | |
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| 162 | G4double GetLambda(G4double kinEnergy); |
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| 163 | |
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| 164 | void GeomLimit(const G4Track& track); |
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| 165 | |
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| 166 | void SetParticle(const G4ParticleDefinition* p); |
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| 167 | |
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| 168 | // hide assignment operator |
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| 169 | G4UrbanMscModel & operator=(const G4UrbanMscModel &right); |
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| 170 | G4UrbanMscModel(const G4UrbanMscModel&); |
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| 171 | |
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| 172 | const G4ParticleDefinition* particle; |
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| 173 | G4ParticleChangeForMSC* fParticleChange; |
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| 174 | |
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| 175 | G4SafetyHelper* safetyHelper; |
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| 176 | G4PhysicsTable* theLambdaTable; |
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| 177 | const G4MaterialCutsCouple* couple; |
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| 178 | G4LossTableManager* theManager; |
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| 179 | |
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| 180 | |
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| 181 | G4double mass; |
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| 182 | G4double charge; |
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| 183 | |
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| 184 | G4double masslimite,masslimitmu; |
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| 185 | |
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| 186 | G4double taubig; |
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| 187 | G4double tausmall; |
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| 188 | G4double taulim; |
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| 189 | G4double currentTau; |
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| 190 | G4double dtrl; |
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| 191 | |
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| 192 | G4double lambdalimit; |
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| 193 | G4double facrange; |
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| 194 | G4double frscaling1,frscaling2; |
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| 195 | G4double tlimit; |
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| 196 | G4double tlimitmin; |
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| 197 | G4double tlimitminfix; |
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| 198 | |
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| 199 | G4double nstepmax; |
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| 200 | G4double geombig; |
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| 201 | G4double geommin; |
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| 202 | G4double geomlimit; |
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| 203 | G4double facgeom; |
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| 204 | G4double skin; |
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| 205 | G4double skindepth; |
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| 206 | G4double smallstep; |
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| 207 | |
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| 208 | G4double presafety; |
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| 209 | G4double facsafety; |
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| 210 | |
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| 211 | G4double lambda0; |
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| 212 | G4double lambdaeff; |
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| 213 | G4double tPathLength; |
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| 214 | G4double zPathLength; |
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| 215 | G4double par1,par2,par3 ; |
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| 216 | |
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| 217 | G4double stepmin ; |
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| 218 | |
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| 219 | G4double currentKinEnergy; |
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| 220 | G4double currentRange; |
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| 221 | G4double currentRadLength; |
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| 222 | |
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| 223 | G4double Zeff; |
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| 224 | |
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| 225 | G4int currentMaterialIndex; |
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| 226 | |
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| 227 | G4MscStepLimitType steppingAlgorithm; |
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| 228 | |
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| 229 | G4bool samplez; |
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| 230 | G4bool latDisplasment; |
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| 231 | G4bool isInitialized; |
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| 232 | |
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| 233 | G4bool inside; |
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| 234 | G4bool insideskin; |
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| 235 | |
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| 236 | }; |
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| 237 | |
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| 238 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 239 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 240 | |
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| 241 | inline |
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| 242 | void G4UrbanMscModel::SetLateralDisplasmentFlag(G4bool val) |
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| 243 | { |
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| 244 | latDisplasment = val; |
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| 245 | } |
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| 246 | |
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| 247 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 248 | |
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| 249 | inline |
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| 250 | void G4UrbanMscModel::SetSkin(G4double val) |
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| 251 | { |
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| 252 | skin = val; |
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| 253 | stepmin = tlimitminfix; |
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| 254 | skindepth = skin*stepmin; |
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| 255 | } |
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| 256 | |
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| 257 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 258 | |
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| 259 | inline |
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| 260 | void G4UrbanMscModel::SetRangeFactor(G4double val) |
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| 261 | { |
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| 262 | facrange = val; |
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| 263 | } |
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| 264 | |
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| 265 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 266 | |
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| 267 | inline |
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| 268 | void G4UrbanMscModel::SetGeomFactor(G4double val) |
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| 269 | { |
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| 270 | facgeom = val; |
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| 271 | } |
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| 272 | |
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| 273 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 274 | |
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| 275 | inline |
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| 276 | void G4UrbanMscModel::SetStepLimitType(G4MscStepLimitType val) |
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| 277 | { |
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| 278 | steppingAlgorithm = val; |
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| 279 | } |
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| 280 | |
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| 281 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 282 | |
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| 283 | inline |
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| 284 | G4double G4UrbanMscModel::GetLambda(G4double e) |
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| 285 | { |
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| 286 | G4double x; |
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| 287 | if(theLambdaTable) { |
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| 288 | G4bool b; |
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| 289 | x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b); |
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| 290 | } else { |
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| 291 | x = CrossSection(couple,particle,e); |
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| 292 | } |
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| 293 | if(x > DBL_MIN) x = 1./x; |
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| 294 | else x = DBL_MAX; |
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| 295 | return x; |
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| 296 | } |
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| 297 | |
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| 298 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 299 | |
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| 300 | inline |
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| 301 | void G4UrbanMscModel::SetParticle(const G4ParticleDefinition* p) |
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| 302 | { |
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| 303 | if (p != particle) { |
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| 304 | particle = p; |
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| 305 | mass = p->GetPDGMass(); |
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| 306 | charge = p->GetPDGCharge()/eplus; |
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| 307 | } |
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| 308 | } |
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| 309 | |
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| 310 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 311 | |
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| 312 | #endif |
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| 313 | |
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