Gabriele Cosmo
104 lines
4.3 KiB
C++
104 lines
4.3 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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/////////////////////////////////////////////////////////////////////////////////
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// Class: G4AdjointAlongStepWeightCorrection
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// Author: L. Desorgher
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// Organisation: SpaceIT GmbH
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/////////////////////////////////////////////////////////////////////////////////
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//
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// Documentation:
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//
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// Continuous processes act on adjoint particles to continuously correct their
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// weight during the adjoint reverse tracking. This process is needed when
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// the adjoint cross sections are not scaled such that the total adjoint cross
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// section matches the total forward cross section. By default the mode where
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// the total adjoint cross section is equal to the total forward cross section
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// is used and therefore this along step weightcorrection factor is 1. However
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// in some cases (some energy ranges) the total forward cross section or the
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// total adjoint cross section can be zero. In this case the along step weight
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// correction is needed and is given by exp(-(Sigma_tot_adj-Sigma_tot_fwd).dx)
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//
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//-------------------------------------------------------------
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#ifndef G4AdjointAlongStepWeightCorrection_h
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#define G4AdjointAlongStepWeightCorrection_h 1
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#include "globals.hh"
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#include "G4VContinuousProcess.hh"
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class G4AdjointCSManager;
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class G4MaterialCutsCouple;
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class G4ParticleDefinition;
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class G4ParticleChange;
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class G4Step;
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class G4Track;
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class G4AdjointAlongStepWeightCorrection : public G4VContinuousProcess
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{
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public:
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explicit G4AdjointAlongStepWeightCorrection(
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const G4String& name = "ContinuousWeightCorrection",
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G4ProcessType type = fElectromagnetic);
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~G4AdjointAlongStepWeightCorrection() override;
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G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&) override;
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void ProcessDescription(std::ostream&) const override;
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void DumpInfo() const override { ProcessDescription(G4cout); };
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G4AdjointAlongStepWeightCorrection(G4AdjointAlongStepWeightCorrection&) =
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delete;
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G4AdjointAlongStepWeightCorrection& operator=(
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const G4AdjointAlongStepWeightCorrection& right) = delete;
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protected:
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G4double GetContinuousStepLimit(const G4Track& track,
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G4double previousStepSize,
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G4double currentMinimumStep,
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G4double& currentSafety) override;
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private:
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void DefineMaterial(const G4MaterialCutsCouple* couple);
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const G4MaterialCutsCouple* fCurrentCouple = nullptr;
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G4AdjointCSManager* fCSManager = nullptr;
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G4ParticleChange* fParticleChange;
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G4double fPreStepKinEnergy = 1.;
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};
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inline void G4AdjointAlongStepWeightCorrection::DefineMaterial(
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const G4MaterialCutsCouple* couple)
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{
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if(couple != fCurrentCouple)
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{
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fCurrentCouple = couple;
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}
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}
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#endif
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