Gabriele Cosmo
209 lines
5.8 KiB
C++
209 lines
5.8 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: G4UrbanMscModel90.hh,v 1.4 2008/10/29 14:15:30 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-02 $
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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: G4UrbanMscModel90
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//
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// Author: V.Ivanchenko clone Laszlo Urban model
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//
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// Creation date: 07.12.2007
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//
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// Modifications:
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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 G4UrbanMscModel90_h
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#define G4UrbanMscModel90_h 1
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "G4VMscModel.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 G4UrbanMscModel90 : public G4VMscModel
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{
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public:
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G4UrbanMscModel90(const G4String& nam = "UrbanMscUni90");
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virtual ~G4UrbanMscModel90();
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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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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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void GeomLimit(const G4Track& track);
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inline G4double GetLambda(G4double kinEnergy);
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inline void SetParticle(const G4ParticleDefinition*);
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// hide assignment operator
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G4UrbanMscModel90 & operator=(const G4UrbanMscModel90 &right);
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G4UrbanMscModel90(const G4UrbanMscModel90&);
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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 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 skindepth;
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G4double smallstep;
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G4double presafety;
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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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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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inline
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G4double G4UrbanMscModel90::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 G4UrbanMscModel90::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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