Gabriele Cosmo
314 lines
9.2 KiB
C++
314 lines
9.2 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// $Id: G4UrbanMscModel.hh,v 1.31 2007/10/29 08:42:43 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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// -------------------------------------------------------------------
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//
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//
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// GEANT4 Class header file
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//
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//
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// File name: G4UrbanMscModel
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//
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// Author: Laszlo Urban
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//
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// Creation date: 01.03.2001
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//
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// Modifications:
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//
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// 27-03-03 Move model part from G4MultipleScattering (V.Ivanchenko)
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// 27-03-03 Rename (V.Ivanchenko)
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//
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// 05-08-03 angle distribution has been modified (L.Urban)
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// 26-11-03 new data member currentRange (L.Urban)
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// 01-03-04 changes in data members + signature changed in SampleCosineTheta
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// 11-03-04 changes in data members (L.Urban)
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// 23-04-04 changes in data members and in signature of SampleCosineTheta
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// (L.Urban)
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// 17-08-04 name of data member facxsi changed to factail (L.Urban)
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// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
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// 15-04-05 optimize internal interface - add SampleSecondaries method (V.Ivanchenko)
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// 11-08-05 computation of lateral correlation added (L.Urban)
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// 02-10-05 nuclear size correction computation removed, the correction
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// included in the (theoretical) tabulated values (L.Urban)
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// 16-02-06 data members b and xsi have been removed (L.Urban)
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// 17-02-06 Save table of transport cross sections not mfp (V.Ivanchenko)
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// 07-03-06 Create G4UrbanMscModel and move there step limit calculation (V.Ivanchenko)
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// 10-05-06 SetMscStepLimitation at initialisation (V.Ivantchenko)
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// 11-05-06 name of data member safety changed to presafety, some new data
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// members added (frscaling1,frscaling2,tlimitminfix,nstepmax)
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// (L.Urban)
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// 13-10-06 data member factail removed, data member tkinlimit changed
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// to lambdalimit,
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// new data members tgeom,tnow,skin,skindepth,Zeff,geomlimit
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// G4double GeomLimit(const G4Track& track) changed to
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// void GeomLimit(const G4Track& track) (L.Urban)
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// 20-10-06 parameter theta0 now computed in the (public)
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// function ComputeTheta0,
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// single scattering modified allowing not small
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// angles as well (L.Urban)
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// 31-01-07 code cleaning (L.Urban)
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// 06-02-07 Move SetMscStepLimitation method into the source (VI)
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// 15-02-07 new data member : smallstep (L.Urban)
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// 10-04-07 remove navigator, smallstep, tnow (V.Ivanchenko)
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//
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//
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// Class Description:
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//
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// Implementation of the model of multiple scattering based on
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// H.W.Lewis Phys Rev 78 (1950) 526 and L.Urban model
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// -------------------------------------------------------------------
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//
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#ifndef G4UrbanMscModel_h
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#define G4UrbanMscModel_h 1
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "G4VEmModel.hh"
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#include "G4PhysicsTable.hh"
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#include "G4MscStepLimitType.hh"
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class G4ParticleChangeForMSC;
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class G4SafetyHelper;
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class G4LossTableManager;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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class G4UrbanMscModel : public G4VEmModel
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{
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public:
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G4UrbanMscModel(G4double facrange, G4double dtrl, G4double lambdalimit,
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G4double facgeom,G4double skin,
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G4bool samplez, G4MscStepLimitType stepAlg,
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const G4String& nam = "UrbanMscUni");
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virtual ~G4UrbanMscModel();
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virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
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G4double ComputeCrossSectionPerAtom(const G4ParticleDefinition* particle,
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G4double KineticEnergy,
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G4double AtomicNumber,
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G4double AtomicWeight=0.,
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G4double cut =0.,
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G4double emax=DBL_MAX);
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void SampleSecondaries(std::vector<G4DynamicParticle*>*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double,
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G4double);
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void SampleScattering(const G4DynamicParticle*,
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G4double safety);
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G4double ComputeTruePathLengthLimit(const G4Track& track,
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G4PhysicsTable* theLambdaTable,
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G4double currentMinimalStep);
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G4double ComputeGeomPathLength(G4double truePathLength);
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G4double ComputeTrueStepLength(G4double geomStepLength);
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G4double ComputeTheta0(G4double truePathLength,
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G4double KineticEnergy);
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void SetStepLimitType(G4MscStepLimitType);
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void SetLateralDisplasmentFlag(G4bool val);
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void SetRangeFactor(G4double);
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void SetGeomFactor(G4double);
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void SetSkin(G4double);
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private:
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G4double SampleCosineTheta(G4double trueStepLength, G4double KineticEnergy);
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G4double SampleDisplacement();
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G4double LatCorrelation();
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G4double GetLambda(G4double kinEnergy);
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void GeomLimit(const G4Track& track);
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void SetParticle(const G4ParticleDefinition* p);
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// hide assignment operator
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G4UrbanMscModel & operator=(const G4UrbanMscModel &right);
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G4UrbanMscModel(const G4UrbanMscModel&);
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const G4ParticleDefinition* particle;
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G4ParticleChangeForMSC* fParticleChange;
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G4SafetyHelper* safetyHelper;
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G4PhysicsTable* theLambdaTable;
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const G4MaterialCutsCouple* couple;
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G4LossTableManager* theManager;
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G4double mass;
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G4double charge;
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G4double masslimite,masslimitmu;
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G4double taubig;
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G4double tausmall;
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G4double taulim;
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G4double currentTau;
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G4double dtrl;
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G4double lambdalimit;
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G4double facrange;
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G4double frscaling1,frscaling2;
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G4double tlimit;
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G4double tlimitmin;
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G4double tlimitminfix;
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G4double nstepmax;
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G4double geombig;
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G4double geommin;
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G4double geomlimit;
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G4double facgeom;
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G4double skin;
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G4double skindepth;
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G4double smallstep;
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G4double presafety;
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G4double facsafety;
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G4double lambda0;
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G4double lambdaeff;
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G4double tPathLength;
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G4double zPathLength;
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G4double par1,par2,par3 ;
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G4double stepmin ;
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G4double currentKinEnergy;
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G4double currentRange;
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G4double currentRadLength;
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G4double Zeff;
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G4int currentMaterialIndex;
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G4MscStepLimitType steppingAlgorithm;
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G4bool samplez;
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G4bool latDisplasment;
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G4bool isInitialized;
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G4bool inside;
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G4bool insideskin;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4UrbanMscModel::SetLateralDisplasmentFlag(G4bool val)
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{
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latDisplasment = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4UrbanMscModel::SetSkin(G4double val)
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{
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skin = val;
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stepmin = tlimitminfix;
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skindepth = skin*stepmin;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4UrbanMscModel::SetRangeFactor(G4double val)
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{
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facrange = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4UrbanMscModel::SetGeomFactor(G4double val)
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{
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facgeom = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4UrbanMscModel::SetStepLimitType(G4MscStepLimitType val)
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{
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steppingAlgorithm = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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G4double G4UrbanMscModel::GetLambda(G4double e)
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{
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G4double x;
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if(theLambdaTable) {
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G4bool b;
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x = ((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b);
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} else {
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x = CrossSection(couple,particle,e);
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}
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if(x > DBL_MIN) x = 1./x;
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else x = DBL_MAX;
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return x;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline
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void G4UrbanMscModel::SetParticle(const G4ParticleDefinition* p)
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{
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if (p != particle) {
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particle = p;
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mass = p->GetPDGMass();
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charge = p->GetPDGCharge()/eplus;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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