Gabriele Cosmo
354 lines
12 KiB
C++
354 lines
12 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// $Id: G4VEmProcess.hh,v 1.4 2004/05/17 09:46:56 vnivanch Exp $
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// GEANT4 tag $Name: geant4-06-02 $
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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: G4VEmProcess
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 01.10.2003
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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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// It is the unified Rest and/or Discrete process
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// -------------------------------------------------------------------
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//
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#ifndef G4VEmProcess_h
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#define G4VEmProcess_h 1
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#include "G4VRestDiscreteProcess.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 "G4Track.hh"
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#include "G4EmModelManager.hh"
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#include "G4UnitsTable.hh"
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#include "G4ParticleDefinition.hh"
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class G4Step;
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class G4VEmModel;
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class G4VEmFluctuationModel;
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class G4DataVector;
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class G4VParticleChange;
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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 G4VEmProcess : public G4VRestDiscreteProcess
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{
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public:
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G4VEmProcess(const G4String& name,
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G4ProcessType type = fElectromagnetic);
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~G4VEmProcess();
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G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
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G4double GetMeanLifeTime(const G4Track& aTrack,
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G4ForceCondition* condition);
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// It is invoked by the ProcessManager of the Positron if this
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// e+ has a kinetic energy null. Then it return 0 to force the
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// call of AtRestDoIt.
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// This function overloads a virtual function of the base class.
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virtual G4VParticleChange* AtRestDoIt(const G4Track& aTrack,
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const G4Step& aStep);
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// It computes the final state of the process:
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// e+ (at rest) e- (at rest) ---> gamma gamma,
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// returned as a ParticleChange object.
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// This function overloads a virtual function of the base class.
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// It is invoked by the ProcessManager of the Particle.
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virtual void SecondariesPostStep(G4VEmModel*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double& tcut,
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G4double& kinEnergy) = 0;
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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 BuildPhysicsTable(const G4ParticleDefinition&);
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// Build physics table during initialisation
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virtual void PrintInfoDefinition();
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// Print out of the class parameters
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G4PhysicsTable* BuildLambdaTable();
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void SetLambdaBinning(G4int nbins);
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// Binning for lambda table
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void SetMinKinEnergy(G4double e);
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G4double MinKinEnergy() const;
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// Min kinetic energy for tables
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void SetMaxKinEnergy(G4double e);
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G4double MaxKinEnergy() const;
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// Max kinetic energy for tables
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G4bool StorePhysicsTable(G4ParticleDefinition*,
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const G4String& directory,
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G4bool ascii = false);
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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 RetrievePhysicsTable(G4ParticleDefinition*,
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const G4String& directory,
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G4bool ascii);
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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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void AddEmModel(G4int, G4VEmModel*, G4VEmFluctuationModel* fluc = 0,
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const G4Region* region = 0);
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// Add EM model coupled with fluctuation model for the region
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void UpdateEmModel(const G4String&, G4double, G4double);
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// Define new energy range for the model identified by the name
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G4double GetLambda(G4double& kinEnergy, const G4MaterialCutsCouple* couple);
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// It returns the Lambda of the process
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G4double MicroscopicCrossSection(G4double kineticEnergy,
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const G4MaterialCutsCouple* couple);
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// It returns the cross section of the process for energy/ material
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void SetIntegral(G4bool val) {integral = val;};
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G4bool IsIntegral() const {return integral;}
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G4double MeanFreePath(const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition);
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const G4ParticleDefinition* Particle() const;
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const G4ParticleDefinition* SecondaryParticle() const;
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void ActivateFluorescence(G4bool, const G4Region* r = 0);
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void ActivateAugerElectronProduction(G4bool, const G4Region* r = 0);
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void SetLambdaFactor(G4double val);
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protected:
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void SetParticle(const G4ParticleDefinition* p);
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void SetSecondaryParticle(const G4ParticleDefinition* p);
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virtual G4double GetMeanFreePath(const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition);
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virtual G4PhysicsVector* LambdaPhysicsVector(const G4MaterialCutsCouple*);
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virtual G4double MinPrimaryEnergy(const G4ParticleDefinition*,
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const G4Material*, G4double cut) = 0;
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G4VEmModel* SelectModel(G4double& kinEnergy);
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size_t CurrentMaterialCutsCoupleIndex() const {return currentMaterialIndex;};
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void ResetNumberOfInteractionLengthLeft();
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// reset (determine the value of)NumberOfInteractionLengthLeft
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private:
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void Initialise();
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void DefineMaterial(const G4MaterialCutsCouple* couple);
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G4double GetLambda(G4double kinEnergy);
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void ComputeLambda(G4double kinEnergy);
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// hide assignment operator
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G4VEmProcess(G4VEmProcess &);
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G4VEmProcess & operator=(const G4VEmProcess &right);
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// =====================================================================
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private:
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G4EmModelManager* modelManager;
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// tables and vectors
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G4PhysicsTable* theLambdaTable;
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G4double* theEnergyOfCrossSectionMax;
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G4double* theCrossSectionMax;
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const G4ParticleDefinition* particle;
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const G4ParticleDefinition* baseParticle;
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const G4ParticleDefinition* secondaryParticle;
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const G4DataVector* theCuts;
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// cash
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const G4Material* currentMaterial;
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const G4MaterialCutsCouple* currentCouple;
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size_t currentMaterialIndex;
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G4int nLambdaBins;
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G4double minKinEnergy;
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G4double maxKinEnergy;
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G4double lambdaFactor;
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G4double preStepLambda;
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G4double preStepMFP;
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G4double preStepKinEnergy;
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G4double mfpKinEnergy;
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G4bool integral;
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G4bool meanFreePath;
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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 G4VEmProcess::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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currentMaterial = couple->GetMaterial();
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currentMaterialIndex = couple->GetIndex();
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if(integral && (!meanFreePath || preStepKinEnergy < mfpKinEnergy))
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ResetNumberOfInteractionLengthLeft();
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VEmProcess::GetLambda(G4double& kineticEnergy,
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const G4MaterialCutsCouple* couple)
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{
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DefineMaterial(couple);
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G4double x = 0.0;
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if(theLambdaTable) x = GetLambda(kineticEnergy);
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return x;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VEmProcess::GetLambda(G4double e)
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{
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G4bool b;
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return (((*theLambdaTable)[currentMaterialIndex])->GetValue(e, b));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VEmProcess::ComputeLambda(G4double e)
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{
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meanFreePath = false;
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mfpKinEnergy = 0.0;
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G4double emax = theEnergyOfCrossSectionMax[currentMaterialIndex];
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if (e <= emax) preStepLambda = GetLambda(e);
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else {
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e *= lambdaFactor;
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if(e > emax) {
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mfpKinEnergy = e;
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preStepLambda = GetLambda(e);
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} else preStepLambda = theCrossSectionMax[currentMaterialIndex];
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VEmProcess::GetMeanFreePath(const G4Track& track, G4double,
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G4ForceCondition*)
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{
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preStepKinEnergy = track.GetKineticEnergy();
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DefineMaterial(track.GetMaterialCutsCouple());
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if (meanFreePath) {
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if (integral) ComputeLambda(preStepKinEnergy);
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else preStepLambda = GetLambda(preStepKinEnergy);
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if(0.0 < preStepLambda) preStepMFP = 1.0/preStepLambda;
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else preStepMFP = DBL_MAX;
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}
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// G4cout<<GetProcessName()<<": e= "<<preStepKinEnergy<<" mfp= "<<preStepMFP<<G4endl;
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return preStepMFP;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline void G4VEmProcess::ResetNumberOfInteractionLengthLeft()
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{
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meanFreePath = true;
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G4VProcess::ResetNumberOfInteractionLengthLeft();
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4VEmModel* G4VEmProcess::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 const G4ParticleDefinition* G4VEmProcess::Particle() const
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{
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return particle;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline const G4ParticleDefinition* G4VEmProcess::SecondaryParticle() const
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{
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return secondaryParticle;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double G4VEmProcess::GetMeanLifeTime(const G4Track&,
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G4ForceCondition*)
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{
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return 0.0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4VParticleChange* G4VEmProcess::AtRestDoIt(const G4Track&,
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const G4Step&)
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{
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return 0;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#endif
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