[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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[961] | 26 | // $Id: G4MultipleScattering71.hh,v 1.6 2008/07/16 11:27:41 vnivanch Exp $ |
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[1228] | 27 | // GEANT4 tag $Name: geant4-09-03 $ |
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[819] | 28 | // |
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| 29 | // |
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| 30 | //------------- G4MultipleScattering71 physics process -------------------------- |
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| 31 | // by Laszlo Urban, March 2001 |
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| 32 | // |
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| 33 | // 07-08-01 new methods Store/Retrieve PhysicsTable |
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| 34 | // 23-08-01 new angle and z distribution,energy dependence reduced, |
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| 35 | // Store,Retrieve methods commented out temporarily, L.Urban |
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| 36 | // 11-09-01 G4MultipleScatteringx put as default: G4MultipleScattering |
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| 37 | // Store,Retrieve methods reactived (mma) |
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| 38 | // 13-09-01 Unused TrueToGeomTransformation method deleted, |
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| 39 | // class description (L.Urban) |
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| 40 | // 19-09-01 come back to previous process name msc |
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| 41 | // 17-04-02 NEW angle distribution + boundary algorithm modified, L.Urban |
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| 42 | // 22-04-02 boundary algorithm modified -> important improvement in timing !!!! |
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| 43 | // (L.Urban) |
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| 44 | // 24-05-02 changes in data members, L.Urban |
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| 45 | // 30-10-02 changes in data members, L.Urban |
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| 46 | // 20-01-03 Migrade to cut per region (V.Ivanchenko) |
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| 47 | // 05-02-03 changes in data members, L.Urban |
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| 48 | // 28-03-03 Move to model design (V.Ivanchenko) |
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| 49 | // 18-04-03 Change name (V.Ivanchenko) |
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| 50 | // 16-06-03: ShortLived are not applicable any more (V.Ivanchenko) |
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| 51 | // 17-08-04 name of data member facxsi changed to factail together |
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| 52 | // with the corresponding set function (L.Urban) |
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| 53 | // 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko) |
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| 54 | // 15-04-05 optimize internal interfaces (V.Ivanchenko) |
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| 55 | // 03-10-05 Process is freezed with the name 71 (V.Ivanchenko) |
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| 56 | // 07-03-06 Create G4UrbanMscModel and move there step limit calculation (V.Ivanchenko) |
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| 57 | // |
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| 58 | //------------------------------------------------------------------------------ |
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| 59 | // |
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[961] | 60 | // $Id: G4MultipleScattering71.hh,v 1.6 2008/07/16 11:27:41 vnivanch Exp $ |
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[1228] | 61 | // GEANT4 tag $Name: geant4-09-03 $ |
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[819] | 62 | |
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| 63 | // class description |
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| 64 | // |
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| 65 | // The class simulates the multiple scattering for any kind |
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| 66 | // of charged particle. |
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| 67 | // |
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| 68 | // class description - end |
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| 69 | |
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| 70 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 71 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 72 | |
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| 73 | #ifndef G4MultipleScattering71_h |
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| 74 | #define G4MultipleScattering71_h 1 |
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| 75 | |
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| 76 | #include "G4VMultipleScattering.hh" |
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| 77 | #include "G4MscModel71.hh" |
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| 78 | |
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| 79 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
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| 80 | |
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| 81 | class G4MultipleScattering71 : public G4VMultipleScattering |
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| 82 | |
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| 83 | { |
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| 84 | public: // with description |
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| 85 | |
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| 86 | G4MultipleScattering71(const G4String& processName="msc"); |
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| 87 | |
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| 88 | virtual ~G4MultipleScattering71(); |
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| 89 | |
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| 90 | // returns true for charged particles, false otherwise |
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| 91 | G4bool IsApplicable (const G4ParticleDefinition& p); |
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| 92 | |
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| 93 | virtual G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&); |
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| 94 | |
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| 95 | virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&); |
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| 96 | |
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| 97 | G4double TruePathLengthLimit(const G4Track& track, |
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| 98 | G4double& lambda, |
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| 99 | G4double currentMinimalStep); |
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| 100 | |
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| 101 | // Print few lines of informations about the process: validity range, |
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| 102 | void PrintInfo(); |
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| 103 | |
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| 104 | // geom. step length distribution should be sampled or not |
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| 105 | void Setsamplez(G4bool value); |
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| 106 | |
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| 107 | // activate boundary algorithm |
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| 108 | void SetBoundary(G4bool value); |
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| 109 | |
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| 110 | // to reduce the energy/step dependence |
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| 111 | void Setdtrl(G4double value); |
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| 112 | |
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| 113 | void Setfactail(G4double value); |
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| 114 | |
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| 115 | // Steplimit after boundary crossing = facrange*range |
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| 116 | // estimated nb of steps at boundary nsmallstep = 1/facrange |
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| 117 | void SetFacrange(G4double val); |
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| 118 | |
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| 119 | // corrs to transport cross section for high energy |
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| 120 | void SetNuclCorrPar(G4double val); |
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| 121 | void SetFactPar(G4double val); |
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| 122 | |
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| 123 | protected: |
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| 124 | |
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| 125 | // This function initialise models |
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| 126 | void InitialiseProcess(const G4ParticleDefinition*); |
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| 127 | |
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| 128 | // This method is used for tracking, it returns step limit |
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| 129 | virtual G4double GetContinuousStepLimit(const G4Track& track, |
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| 130 | G4double previousStepSize, |
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| 131 | G4double currentMinimalStep, |
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| 132 | G4double& currentSafety); |
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| 133 | |
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| 134 | private: |
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| 135 | |
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| 136 | // hide assignment operator as private |
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| 137 | G4MultipleScattering71 & operator = (const G4MultipleScattering71 &right); |
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| 138 | G4MultipleScattering71 ( const G4MultipleScattering71 &); |
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| 139 | |
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| 140 | private: // data members |
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| 141 | |
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| 142 | G4MscModel71* model; |
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| 143 | |
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| 144 | G4double lowKineticEnergy; |
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| 145 | G4double highKineticEnergy; |
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| 146 | G4int totBins; |
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| 147 | |
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| 148 | G4double truePathLength; |
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| 149 | G4double geomPathLength; |
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| 150 | G4double trueStepLength; |
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| 151 | G4double range; |
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| 152 | |
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| 153 | G4double facrange; |
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| 154 | G4double tlimit; |
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| 155 | G4double tlimitmin; |
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| 156 | G4double dtrl; |
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| 157 | G4double NuclCorrPar; |
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| 158 | G4double FactPar; |
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| 159 | G4double factail; |
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| 160 | G4double cf; |
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| 161 | |
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| 162 | G4int stepnolastmsc; |
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| 163 | G4int nsmallstep; |
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| 164 | |
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| 165 | G4bool samplez; |
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| 166 | G4bool boundary; |
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| 167 | G4bool isInitialized; |
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| 168 | |
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| 169 | }; |
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| 170 | |
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| 171 | //-------------------------------------------------------------------- |
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| 172 | // inline methods |
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| 173 | //-------------------------------------------------------------------- |
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| 174 | |
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| 175 | inline G4bool G4MultipleScattering71::IsApplicable (const G4ParticleDefinition& p) |
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| 176 | { |
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| 177 | return (p.GetPDGCharge() != 0.0 && !p.IsShortLived()); |
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| 178 | } |
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| 179 | |
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| 180 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 181 | |
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| 182 | inline G4VParticleChange* G4MultipleScattering71::AlongStepDoIt( |
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| 183 | const G4Track&, |
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| 184 | const G4Step& step) |
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| 185 | { |
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| 186 | G4double geomStepLength = step.GetStepLength(); |
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| 187 | if((geomStepLength == geomPathLength) && (truePathLength <= range)) |
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| 188 | trueStepLength = truePathLength; |
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| 189 | else |
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| 190 | trueStepLength = model->TrueStepLength(geomStepLength); |
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| 191 | fParticleChange.ProposeTrueStepLength(trueStepLength); |
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| 192 | return &fParticleChange; |
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| 193 | } |
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| 194 | |
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| 195 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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| 196 | |
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| 197 | inline G4VParticleChange* G4MultipleScattering71::PostStepDoIt(const G4Track& track, |
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| 198 | const G4Step& step) |
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| 199 | { |
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| 200 | fParticleChange.Initialize(track); |
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| 201 | std::vector<G4DynamicParticle*>* p = 0; |
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| 202 | model->SampleSecondaries(p, CurrentMaterialCutsCouple(),track.GetDynamicParticle(), |
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| 203 | step.GetStepLength(),step.GetPostStepPoint()->GetSafety()); |
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| 204 | return &fParticleChange; |
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| 205 | } |
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| 206 | |
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| 207 | // geom. step length distribution should be sampled or not |
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| 208 | inline void G4MultipleScattering71::Setsamplez(G4bool value) |
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| 209 | { |
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| 210 | samplez = value; |
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| 211 | } |
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| 212 | |
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| 213 | // activate boundary algorithm |
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| 214 | inline void G4MultipleScattering71::SetBoundary(G4bool value) |
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| 215 | { |
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| 216 | boundary = value; |
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| 217 | } |
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| 218 | |
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| 219 | // to reduce the energy/step dependence |
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| 220 | inline void G4MultipleScattering71::Setdtrl(G4double value) |
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| 221 | { |
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| 222 | dtrl = value; |
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| 223 | } |
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| 224 | |
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| 225 | inline void G4MultipleScattering71::Setfactail(G4double value) |
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| 226 | { |
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| 227 | factail = value; |
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| 228 | } |
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| 229 | |
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| 230 | // Steplimit after boundary crossing = facrange*range |
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| 231 | // estimated nb of steps at boundary nsmallstep = 1/facrange |
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| 232 | inline void G4MultipleScattering71::SetFacrange(G4double val) |
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| 233 | { |
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| 234 | facrange = val; |
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| 235 | nsmallstep = G4int(std::log((cf+facrange-1.)/facrange)/std::log(cf))+1; |
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| 236 | } |
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| 237 | |
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| 238 | // corrs to transport cross section for high energy |
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| 239 | inline void G4MultipleScattering71::SetNuclCorrPar(G4double val) |
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| 240 | { |
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| 241 | NuclCorrPar = val; |
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| 242 | } |
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| 243 | |
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| 244 | inline void G4MultipleScattering71::SetFactPar(G4double val) |
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| 245 | { |
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| 246 | FactPar = val; |
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| 247 | } |
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| 248 | |
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| 249 | #endif |
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| 250 | |
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| 251 | |
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| 252 | |
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