Gabriele Cosmo
634 lines
21 KiB
C++
634 lines
21 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: G4VMultipleScattering.hh,v 1.46 2007/06/11 14:56:51 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-00 $
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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: G4VMultipleScattering
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//
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// Author: Vladimir Ivanchenko on base of Laszlo Urban code
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//
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// Creation date: 12.03.2002
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//
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// Modifications:
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//
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// 16-07-03 Update GetRange interface (V.Ivanchenko)
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//
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//
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// Class Description:
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//
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// It is the generic process of multiple scattering it includes common
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// part of calculations for all charged particles
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//
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// 26-11-03 bugfix in AlongStepDoIt (L.Urban)
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// 25-05-04 add protection against case when range is less than steplimit (VI)
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// 30-06-04 make destructor virtual (V.Ivanchenko)
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// 27-08-04 Add InitialiseForRun method (V.Ivanchneko)
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// 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivanchenko)
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// 15-04-05 optimize internal interfaces (V.Ivanchenko)
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// 15-04-05 remove boundary flag (V.Ivanchenko)
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// 07-10-05 error in a protection in GetContinuousStepLimit corrected (L.Urban)
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// 27-10-05 introduce virtual function MscStepLimitation() (V.Ivanchenko)
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// 26-01-06 Rename GetRange -> GetRangeFromRestricteDEDX (V.Ivanchenko)
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// 17-02-06 Save table of transport cross sections not mfp (V.Ivanchenko)
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// 07-03-06 Move step limit calculation to model (V.Ivanchenko)
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// 13-05-06 Add method to access model by index (V.Ivanchenko)
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// 12-02-07 Add get/set skin (V.Ivanchenko)
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//
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// -------------------------------------------------------------------
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//
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#ifndef G4VMultipleScattering_h
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#define G4VMultipleScattering_h 1
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#include "G4VContinuousDiscreteProcess.hh"
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#include "G4LossTableManager.hh"
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#include "globals.hh"
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#include "G4Material.hh"
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#include "G4MaterialCutsCouple.hh"
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#include "G4ParticleChangeForMSC.hh"
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#include "G4Track.hh"
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#include "G4Step.hh"
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#include "G4EmModelManager.hh"
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#include "G4VEmModel.hh"
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#include "G4MscStepLimitType.hh"
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class G4ParticleDefinition;
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class G4DataVector;
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class G4PhysicsTable;
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class G4PhysicsVector;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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class G4VMultipleScattering : public G4VContinuousDiscreteProcess
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{
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public:
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G4VMultipleScattering(const G4String& name = "msc",
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G4ProcessType type = fElectromagnetic);
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virtual ~G4VMultipleScattering();
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//------------------------------------------------------------------------
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// Virtual methods to be implemented for the concrete model
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//------------------------------------------------------------------------
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virtual G4bool IsApplicable(const G4ParticleDefinition& p) = 0;
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// True for all charged particles
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virtual void PrintInfo() = 0;
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protected:
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virtual void InitialiseProcess(const G4ParticleDefinition*) = 0;
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//------------------------------------------------------------------------
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// Methods with standard implementation; may be overwritten if needed
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//------------------------------------------------------------------------
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public:
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//------------------------------------------------------------------------
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// Generic methods common to all ContinuousDiscrete processes
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//------------------------------------------------------------------------
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// Initialise for build of tables
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virtual void PreparePhysicsTable(const G4ParticleDefinition&);
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// Build physics table during initialisation
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virtual void BuildPhysicsTable(const G4ParticleDefinition&);
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// Print out of generic class parameters
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void PrintInfoDefinition();
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inline virtual G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&);
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inline virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
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// Store PhysicsTable in a file.
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// Return false in case of failure at I/O
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G4bool StorePhysicsTable(const G4ParticleDefinition*,
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const G4String& directory,
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G4bool ascii = false);
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// Retrieve Physics from a file.
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// (return true if the Physics Table can be build by using file)
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// (return false if the process has no functionality or in case of failure)
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// File name should is constructed as processName+particleName and the
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// should be placed under the directory specifed by the argument.
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G4bool RetrievePhysicsTable(const G4ParticleDefinition*,
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const G4String& directory,
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G4bool ascii);
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//------------------------------------------------------------------------
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// Specific methods for multiple scattering
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//------------------------------------------------------------------------
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// Build empty Physics Vector
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G4PhysicsVector* PhysicsVector(const G4MaterialCutsCouple*);
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// The function overloads the corresponding function of the base
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// class.It limits the step near to boundaries only
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// and invokes the method GetMscContinuousStepLimit at every step.
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inline virtual G4double AlongStepGetPhysicalInteractionLength(
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const G4Track&,
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G4double previousStepSize,
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G4double currentMinimalStep,
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G4double& currentSafety,
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G4GPILSelection* selection);
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// The function overloads the corresponding function of the base
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// class.
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inline virtual G4double PostStepGetPhysicalInteractionLength(
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const G4Track&,
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G4double previousStepSize,
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G4ForceCondition* condition);
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// This method does not used for tracking, it is intended only for tests
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inline virtual G4double ContinuousStepLimit(const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimalStep,
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G4double& currentSafety);
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//------------------------------------------------------------------------
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// Specific methods to build and access Physics Tables
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//------------------------------------------------------------------------
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inline void SetBinning(G4int nbins);
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inline G4int Binning() const;
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inline void SetMinKinEnergy(G4double e);
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inline G4double MinKinEnergy() const;
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// Print out of the class parameters
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inline void SetMaxKinEnergy(G4double e);
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inline G4double MaxKinEnergy() const;
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inline void SetBuildLambdaTable(G4bool val);
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inline G4PhysicsTable* LambdaTable() const;
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//------------------------------------------------------------------------
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// Define and access particle type
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//------------------------------------------------------------------------
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inline const G4ParticleDefinition* Particle() const;
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inline void SetParticle(const G4ParticleDefinition*);
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//------------------------------------------------------------------------
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// Specific methods to set, access, modify models
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//------------------------------------------------------------------------
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void AddEmModel(G4int, G4VEmModel*, const G4Region* region = 0);
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inline G4VEmModel* SelectModelForMaterial(G4double kinEnergy, size_t& idxRegion) const;
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// Access to models
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inline G4VEmModel* GetModelByIndex(G4int idx = 0);
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//------------------------------------------------------------------------
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// Parameters for simulation of multiple scattering
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//------------------------------------------------------------------------
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inline void SetLateralDisplasmentFlag(G4bool val);
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// lateral displacement to be/not to be computed
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inline void SetSkin(G4double val);
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// skin parameter
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inline void SetRangeFactor(G4double val);
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// FactorRange parameter
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inline void SetGeomFactor(G4double val);
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// FactorRange parameter
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inline void SetStepLimitType(G4MscStepLimitType val);
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// FactorRange parameter
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protected:
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// This method is used for tracking, it returns mean free path value
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inline virtual G4double GetMeanFreePath(const G4Track& track,
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G4double,
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G4ForceCondition* condition);
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//------------------------------------------------------------------------
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// Run time methods
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//------------------------------------------------------------------------
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inline G4double GetLambda(const G4ParticleDefinition* p, G4double& kineticEnergy);
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// This method is used for tracking, it returns step limit
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inline G4double GetMscContinuousStepLimit(const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimalStep,
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G4double& currentSafety);
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// This method is not used for tracking, it returns step limit
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inline virtual G4double GetContinuousStepLimit(const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimalStep,
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G4double& currentSafety);
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inline G4VEmModel* SelectModel(G4double kinEnergy);
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// Select concrete model
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inline const G4MaterialCutsCouple* CurrentMaterialCutsCouple() const;
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// Return current G4MaterialCutsCouple
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inline void DefineMaterial(const G4MaterialCutsCouple* couple);
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// define current material
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//------------------------------------------------------------------------
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// Parameters for simulation of multiple scattering
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//------------------------------------------------------------------------
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inline G4double Skin() const;
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inline G4double RangeFactor() const;
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inline G4double GeomFactor() const;
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inline G4MscStepLimitType StepLimitType() const;
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inline G4bool LateralDisplasmentFlag() const;
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private:
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// hide assignment operator
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G4VMultipleScattering(G4VMultipleScattering &);
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G4VMultipleScattering & operator=(const G4VMultipleScattering &right);
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// =====================================================================
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protected:
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G4GPILSelection valueGPILSelectionMSC;
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G4ParticleChangeForMSC fParticleChange;
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private:
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G4EmModelManager* modelManager;
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G4VEmModel* currentModel;
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G4PhysicsTable* theLambdaTable;
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// cache
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const G4ParticleDefinition* firstParticle;
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const G4ParticleDefinition* currentParticle;
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const G4MaterialCutsCouple* currentCouple;
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size_t currentMaterialIndex;
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G4int nBins;
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G4MscStepLimitType stepLimit;
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G4double minKinEnergy;
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G4double maxKinEnergy;
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G4double skin;
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G4double facrange;
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G4double facgeom;
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G4bool latDisplasment;
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G4bool buildLambdaTable;
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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 void G4VMultipleScattering::DefineMaterial(const G4MaterialCutsCouple* couple)
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{
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if(couple != currentCouple) {
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currentCouple = couple;
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currentMaterialIndex = couple->GetIndex();
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::PostStepGetPhysicalInteractionLength(
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const G4Track&, G4double, G4ForceCondition* condition)
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{
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*condition = Forced;
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return DBL_MAX;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::GetMeanFreePath(
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const G4Track&, G4double, G4ForceCondition* condition)
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{
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*condition = Forced;
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return DBL_MAX;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4VMultipleScattering::AlongStepGetPhysicalInteractionLength(
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const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimalStep,
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G4double& currentSafety,
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G4GPILSelection* selection)
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{
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// get Step limit proposed by the process
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valueGPILSelectionMSC = NotCandidateForSelection;
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G4double steplength = GetMscContinuousStepLimit(track,previousStepSize,
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currentMinimalStep,currentSafety);
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// G4cout << "StepLimit= " << steplength << G4endl;
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// set return value for G4GPILSelection
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*selection = valueGPILSelectionMSC;
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return steplength;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::GetMscContinuousStepLimit(
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const G4Track& track,
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G4double,
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G4double currentMinimalStep,
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G4double&)
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{
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G4double x = currentMinimalStep;
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G4double e = track.GetKineticEnergy();
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DefineMaterial(track.GetMaterialCutsCouple());
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currentModel = SelectModel(e);
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if(x > 0.0 && e > 0.0) {
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G4double tPathLength =
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currentModel->ComputeTruePathLengthLimit(track, theLambdaTable, x);
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if (tPathLength < x) valueGPILSelectionMSC = CandidateForSelection;
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x = currentModel->ComputeGeomPathLength(tPathLength);
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// G4cout << "tPathLength= " << tPathLength
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// << " stepLimit= " << x
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// << " currentMinimalStep= " << currentMinimalStep<< G4endl;
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}
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return x;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::GetContinuousStepLimit(
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const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimalStep,
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G4double& currentSafety)
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{
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return GetMscContinuousStepLimit(track,previousStepSize,currentMinimalStep,
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currentSafety);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::ContinuousStepLimit(
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const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimalStep,
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G4double& currentSafety)
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{
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return GetMscContinuousStepLimit(track,previousStepSize,currentMinimalStep,
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currentSafety);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::GetLambda(const G4ParticleDefinition* p, 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 = currentModel->CrossSection(currentCouple,p,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 G4VParticleChange* G4VMultipleScattering::AlongStepDoIt(
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const G4Track&,
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const G4Step& step)
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{
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fParticleChange.ProposeTrueStepLength(
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currentModel->ComputeTrueStepLength(step.GetStepLength()));
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return &fParticleChange;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4VParticleChange* G4VMultipleScattering::PostStepDoIt(const G4Track& track,
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const G4Step& step)
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{
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fParticleChange.Initialize(track);
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std::vector<G4DynamicParticle*>* p=0;
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currentModel->SampleSecondaries(p, currentCouple,
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track.GetDynamicParticle(),
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step.GetStepLength(),
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step.GetPostStepPoint()->GetSafety());
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return &fParticleChange;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4VEmModel* G4VMultipleScattering::SelectModel(G4double kinEnergy)
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{
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return modelManager->SelectModel(kinEnergy, currentMaterialIndex);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4VEmModel* G4VMultipleScattering::SelectModelForMaterial(
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G4double kinEnergy, size_t& idxRegion) const
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{
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return modelManager->SelectModel(kinEnergy, idxRegion);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VMultipleScattering::SetBinning(G4int nbins)
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{
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nBins = nbins;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4int G4VMultipleScattering::Binning() const
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{
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return nBins;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VMultipleScattering::SetMinKinEnergy(G4double e)
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{
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minKinEnergy = e;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::MinKinEnergy() const
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{
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return minKinEnergy;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VMultipleScattering::SetMaxKinEnergy(G4double e)
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{
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maxKinEnergy = e;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::MaxKinEnergy() const
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{
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return maxKinEnergy;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4bool G4VMultipleScattering::LateralDisplasmentFlag() const
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{
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return latDisplasment;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VMultipleScattering::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 G4double G4VMultipleScattering::Skin() const
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{
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return skin;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VMultipleScattering::SetSkin(G4double val)
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{
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if(val <= 0.99999) {
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skin = 0.0;
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stepLimit = fUseSafety;
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} else {
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skin = val;
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stepLimit = fUseDistanceToBoundary;
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::RangeFactor() const
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{
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|
return facrange;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VMultipleScattering::SetRangeFactor(G4double val)
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|
{
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if(val > 0.0) facrange = val;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VMultipleScattering::GeomFactor() const
|
|
{
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return facgeom;
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}
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|
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
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inline void G4VMultipleScattering::SetGeomFactor(G4double val)
|
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{
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if(val > 0.0) facgeom = val;
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}
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|
|
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
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inline G4MscStepLimitType G4VMultipleScattering::StepLimitType() const
|
|
{
|
|
return stepLimit;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
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inline void G4VMultipleScattering::SetStepLimitType(G4MscStepLimitType val)
|
|
{
|
|
stepLimit = val;
|
|
if(val == fMinimal) {
|
|
skin = 0;
|
|
facrange = 0.2;
|
|
} else if(val == fUseSafety) {
|
|
skin = 0;
|
|
}
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
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inline void G4VMultipleScattering::SetBuildLambdaTable(G4bool val)
|
|
{
|
|
buildLambdaTable = val;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
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inline const G4ParticleDefinition* G4VMultipleScattering::Particle() const
|
|
{
|
|
return currentParticle;
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
|
inline G4PhysicsTable* G4VMultipleScattering::LambdaTable() const
|
|
{
|
|
return theLambdaTable;
|
|
}
|
|
|
|
inline
|
|
const G4MaterialCutsCouple* G4VMultipleScattering::CurrentMaterialCutsCouple() const
|
|
{
|
|
return currentCouple;
|
|
}
|
|
|
|
inline G4VEmModel* G4VMultipleScattering::GetModelByIndex(G4int idx)
|
|
{
|
|
return modelManager->GetModel(idx);
|
|
}
|
|
|
|
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
|
|
|
|
#endif
|