Gabriele Cosmo
336 lines
14 KiB
C++
336 lines
14 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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//
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// ===========================================================================
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// GEANT4 class header file
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//
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// Class: G4IonParametrisedLossModel
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//
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// Base class: G4VEmModel (utils)
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//
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// Author: Anton Lechner (Anton.Lechner@cern.ch)
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//
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// First implementation: 10. 11. 2008
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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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// Model for computing the energy loss of ions by employing a
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// parameterisation of dE/dx tables (default ICRU 73 tables). For
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// ion-material combinations and/or projectile energies not covered
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// by this model, the G4BraggIonModel and G4BetheBloch models are
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// employed.
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//
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// Comments:
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//
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// ===========================================================================
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#ifndef G4IONPARAMETRISEDLOSSMODEL_HH
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#define G4IONPARAMETRISEDLOSSMODEL_HH
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#include "G4VEmModel.hh"
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#include "G4EmCorrections.hh"
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#include "G4IonParametrisedLossTable.hh"
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#include "G4EmCorrections.hh"
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#include <iomanip>
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#include <list>
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#include <map>
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#include <utility>
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class G4BraggIonModel;
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class G4BetheBlochModel;
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class G4ParticleChangeForLoss;
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typedef std::list<G4IonLossTableHandle*> LossTableList;
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typedef std::pair<const G4ParticleDefinition*, const G4Material*> IonMatCouple;
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class G4IonParametrisedLossModel : public G4VEmModel {
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public:
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G4IonParametrisedLossModel(const G4ParticleDefinition* particle = 0,
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const G4String& name = "ParamICRU73");
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virtual ~G4IonParametrisedLossModel();
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virtual void Initialise(
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const G4ParticleDefinition*, // Projectile
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const G4DataVector&); // Cut energies
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virtual G4double MinEnergyCut(
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const G4ParticleDefinition*, // Projectile
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const G4MaterialCutsCouple*);
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virtual G4double ComputeCrossSectionPerAtom(
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const G4ParticleDefinition*, // Projectile
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G4double, // Kinetic energy of projectile
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G4double, // Atomic number
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G4double, // Mass number
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G4double, // Energy cut for secondary prod.
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G4double); // Maximum energy of secondaries
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virtual G4double CrossSectionPerVolume(
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const G4Material*, // Target material
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const G4ParticleDefinition*, // Projectile
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G4double, // Kinetic energy
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G4double, // Energy cut for secondary prod.
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G4double); // Maximum energy of secondaries
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virtual G4double ComputeDEDXPerVolume(
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const G4Material*, // Target material
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const G4ParticleDefinition*, // Projectile
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G4double, // Kinetic energy of projectile
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G4double); // Energy cut for secondary prod.
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// Function, which computes the continuous energy loss (due to electronic
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// stopping) for a given pre-step energy and step length by using
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// range vs energy (and energy vs range) tables
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G4double ComputeLossForStep(
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const G4Material*, // Target material
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const G4ParticleDefinition*, // Projectile
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G4double, // Kinetic energy of projectile
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G4double, // Energy cut for secondary prod.
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G4double); // Length of current step
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// Function, which computes the mean energy transfer rate to delta rays
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G4double DeltaRayMeanEnergyTransferRate(
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const G4Material*, // Target Material
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const G4ParticleDefinition*, // Projectile
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G4double, // Kinetic energy of projectile
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G4double); // Energy cut for secondary prod.
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virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double, // Energy cut for secondary prod.
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G4double); // Maximum energy of secondaries
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virtual G4double GetChargeSquareRatio(
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const G4ParticleDefinition*, // Projectile
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const G4Material*, // Target Material
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G4double); // Kinetic energy of projectile
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virtual G4double GetParticleCharge(
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const G4ParticleDefinition*, // Projectile
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const G4Material*, // Target Material
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G4double); // Kinetic energy of projectile
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virtual void CorrectionsAlongStep(
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const G4MaterialCutsCouple*,// Mat.-Cut couple
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const G4DynamicParticle*, // Dyn. particle
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G4double&, // Energy loss in current step
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G4double&,
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G4double); // Length of current step
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// Template function which allows to add additional stopping power tables
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// in combination with a scaling algorithm, which may depend on dynamic
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// information like the current particle energy (the table and scaling
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// algorithm are used via a wrapper class, which performs e.g.caching or
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// which applies the scaling of energy and dE/dx values)
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template <class TABLE, class SCALING_ALGO>
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void AddDEDXTable() {
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G4IonLossTableHandle* table =
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new G4IonParametrisedLossTable<TABLE, SCALING_ALGO>;
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lossTableList.push_front(table);
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}
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// Template function which allows to add additional stopping power tables
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// (the table itself is used via a wrapper class, which performs e.g.
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// caching)
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template <class TABLE>
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void AddDEDXTable() {
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G4IonLossTableHandle* table =
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new G4IonParametrisedLossTable<TABLE>;
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lossTableList.push_front(table);
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}
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// Function checking the applicability of physics tables to ion-material
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// combinations (Note: the energy range of tables is not checked)
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LossTableList::iterator IsApplicable(
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const G4ParticleDefinition*, // Projectile (ion)
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const G4Material*); // Target material
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// Function printing a dE/dx table for a given ion-material combination
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// and a specified energy grid
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void PrintDEDXTable(
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const G4ParticleDefinition*, // Projectile (ion)
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const G4Material*, // Absorber material
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G4double, // Minimum energy per nucleon
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G4double, // Maximum energy per nucleon
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G4int, // Number of bins
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G4bool); // Logarithmic scaling of energy
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protected:
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G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
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G4double); // Kinetic energy of projectile
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private:
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// Function which updates parameters concerning the dE/dx calculation
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// (the parameters are only updated if the particle, the material or
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// the associated energy cut has changed)
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void UpdateDEDXCache(
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const G4ParticleDefinition*, // Projectile (ion)
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const G4Material*, // Target material
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G4double cutEnergy); // Energy cut
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// Function, which updates parameters concering particle properties
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void UpdateCache(
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const G4ParticleDefinition*); // Projectile (ion)
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// Function, which builds range vs energy (and energy vs range) vectors
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// for a given particle, material and energy cut
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void BuildRangeVector(
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const G4ParticleDefinition*, // Projectile (ion)
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const G4Material*, // Target material
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G4double); // Energy cut
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// Assignment operator and copy constructor are hidden:
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G4IonParametrisedLossModel & operator=(
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const G4IonParametrisedLossModel &right);
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G4IonParametrisedLossModel(const G4IonParametrisedLossModel &);
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// ######################################################################
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// # Models and dE/dx tables for computing the energy loss
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// #
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// ######################################################################
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// G4BraggIonModel and G4BetheBlochModel are used for ion-target
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// combinations and/or projectile energies not covered by parametrisations
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// adopted by this model:
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G4BraggIonModel* braggIonModel;
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G4BetheBlochModel* betheBlochModel;
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// List of dE/dx tables plugged into the model
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LossTableList lossTableList;
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// ######################################################################
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// # Maps of Range vs Energy and Energy vs Range vectors
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// #
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// ######################################################################
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typedef std::map<IonMatCouple, G4LPhysicsFreeVector*> RangeEnergyTable;
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RangeEnergyTable r;
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typedef std::map<IonMatCouple, G4LPhysicsFreeVector*> EnergyRangeTable;
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EnergyRangeTable E;
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// ######################################################################
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// # Energy grid definitions (e.g. used for computing range-energy
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// # tables)
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// ######################################################################
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G4double lowerEnergyEdgeIntegr;
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G4double upperEnergyEdgeIntegr;
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size_t nmbBins;
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size_t nmbSubBins;
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// ######################################################################
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// # Particle change for loss
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// #
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// ######################################################################
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// Pointer to particle change object, which is used to set e.g. the
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// energy loss due to nuclear stopping
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G4ParticleChangeForLoss* particleChangeLoss;
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// Flag indicating if model is initialized (i.e. if
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// G4ParticleChangeForLoss was created)
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G4bool modelIsInitialised;
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// ######################################################################
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// # Corrections and energy loss limit
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// #
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// ######################################################################
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// Pointer to an G4EmCorrections object, which is used to compute the
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// effective ion charge, and other corrections (like high order corrections
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// to stopping powers)
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G4EmCorrections* corrections;
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// Corrections factor for effective charge, computed for each particle
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// step
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G4double corrFactor;
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// Parameter indicating the maximal fraction of kinetic energy, which
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// a particle may loose along a step, in order that the simple relation
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// (dE/dx)*l can still be applied to compute the energy loss (l = step
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// length)
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G4double energyLossLimit;
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// ######################################################################
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// # Cut energies and properties of generic ion
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// #
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// ######################################################################
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// Vector containing the current cut energies (the vector index matches
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// the material-cuts couple index):
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G4DataVector cutEnergies;
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// Pointer to generic ion and mass of generic ion
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G4ParticleDefinition* genericIon;
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G4double genericIonPDGMass;
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// ######################################################################
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// # "Most-recently-used" cache parameters
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// #
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// ######################################################################
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// Cached key (particle) and value information for a faster
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// access of particle-related information
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const G4ParticleDefinition* cacheParticle; // Key: Current projectile
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G4double cacheMass; // Projectile mass
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G4double cacheElecMassRatio; // Electron-mass ratio
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G4double cacheChargeSquare; // Charge squared
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// Cached parameters needed during dE/dx computations:
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const G4ParticleDefinition* dedxCacheParticle; // Key: 1) Current ion,
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const G4Material* dedxCacheMaterial; // 2) material and
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G4double dedxCacheEnergyCut; // 3) cut energy
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LossTableList::iterator dedxCacheIter; // Responsible dE/dx table
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G4PhysicsVector* dedxCacheEnergyRange; // Energy vs range vector
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G4PhysicsVector* dedxCacheRangeEnergy; // Range vs energy vector
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G4double dedxCacheTransitionEnergy; // Transition energy between
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// parameterization and
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// Bethe-Bloch model
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G4double dedxCacheTransitionFactor; // Factor for smoothing the dE/dx
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// values in the transition region
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G4double dedxCacheGenIonMassRatio; // Ratio of generic ion mass
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// and current particle mass
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};
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#include "G4IonParametrisedLossModel.icc"
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#endif
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