| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | //
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| 27 | //
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| 28 | // ===========================================================================
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| 29 | // GEANT4 class header file
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| 30 | //
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| 31 | // Class: G4IonParametrisedLossModel
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| 32 | //
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| 33 | // Base class: G4VEmModel (utils)
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| 34 | //
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| 35 | // Author: Anton Lechner (Anton.Lechner@cern.ch)
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| 36 | //
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| 37 | // First implementation: 10. 11. 2008
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| 38 | //
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| 39 | // Modifications: 03. 02. 2009 - Bug fix iterators (AL)
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| 40 | // 11. 03. 2009 - Introduced new table handler (G4IonDEDXHandler)
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| 41 | // and modified method to add/remove tables
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| 42 | // (tables are now built in initialisation phase),
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| 43 | // Minor bug fix in ComputeDEDXPerVolume (AL)
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| 44 | //
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| 45 | // Class description:
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| 46 | // Model for computing the energy loss of ions by employing a
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| 47 | // parameterisation of dE/dx tables (default ICRU 73 tables). For
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| 48 | // ion-material combinations and/or projectile energies not covered
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| 49 | // by this model, the G4BraggIonModel and G4BetheBloch models are
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| 50 | // employed.
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| 51 | //
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| 52 | // Comments:
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| 53 | //
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| 54 | // ===========================================================================
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| 55 |
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| 56 |
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| 57 | #ifndef G4IONPARAMETRISEDLOSSMODEL_HH
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| 58 | #define G4IONPARAMETRISEDLOSSMODEL_HH
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| 59 |
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| 60 | #include "G4VEmModel.hh"
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| 61 | #include "G4EmCorrections.hh"
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| 62 | #include "G4IonDEDXHandler.hh"
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| 63 | #include <iomanip>
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| 64 | #include <list>
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| 65 | #include <map>
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| 66 | #include <utility>
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| 67 |
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| 68 | class G4BraggIonModel;
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| 69 | class G4BetheBlochModel;
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| 70 | class G4ParticleChangeForLoss;
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| 71 | class G4VIonDEDXTable;
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| 72 | class G4VIonDEDXScalingAlgorithm;
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| 73 | class G4LPhysicsFreeVector;
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| 74 |
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| 75 | typedef std::list<G4IonDEDXHandler*> LossTableList;
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| 76 | typedef std::pair<const G4ParticleDefinition*, const G4Material*> IonMatCouple;
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| 77 |
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| 78 |
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| 79 | class G4IonParametrisedLossModel : public G4VEmModel {
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| 80 |
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| 81 | public:
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| 82 | G4IonParametrisedLossModel(const G4ParticleDefinition* particle = 0,
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| 83 | const G4String& name = "ParamICRU73");
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| 84 |
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| 85 | virtual ~G4IonParametrisedLossModel();
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| 86 |
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| 87 | virtual void Initialise(
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| 88 | const G4ParticleDefinition*, // Projectile
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| 89 | const G4DataVector&); // Cut energies
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| 90 |
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| 91 | virtual G4double MinEnergyCut(
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| 92 | const G4ParticleDefinition*, // Projectile
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| 93 | const G4MaterialCutsCouple*);
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| 94 |
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| 95 | virtual G4double ComputeCrossSectionPerAtom(
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| 96 | const G4ParticleDefinition*, // Projectile
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| 97 | G4double, // Kinetic energy of projectile
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| 98 | G4double, // Atomic number
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| 99 | G4double, // Mass number
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| 100 | G4double, // Energy cut for secondary prod.
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| 101 | G4double); // Maximum energy of secondaries
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| 102 |
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| 103 | virtual G4double CrossSectionPerVolume(
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| 104 | const G4Material*, // Target material
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| 105 | const G4ParticleDefinition*, // Projectile
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| 106 | G4double, // Kinetic energy
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| 107 | G4double, // Energy cut for secondary prod.
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| 108 | G4double); // Maximum energy of secondaries
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| 109 |
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| 110 | virtual G4double ComputeDEDXPerVolume(
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| 111 | const G4Material*, // Target material
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| 112 | const G4ParticleDefinition*, // Projectile
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| 113 | G4double, // Kinetic energy of projectile
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| 114 | G4double); // Energy cut for secondary prod.
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| 115 |
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| 116 | // Function, which computes the continuous energy loss (due to electronic
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| 117 | // stopping) for a given pre-step energy and step length by using
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| 118 | // range vs energy (and energy vs range) tables
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| 119 | G4double ComputeLossForStep(
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| 120 | const G4Material*, // Target material
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| 121 | const G4ParticleDefinition*, // Projectile
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| 122 | G4double, // Kinetic energy of projectile
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| 123 | G4double, // Energy cut for secondary prod.
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| 124 | G4double); // Length of current step
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| 125 |
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| 126 | // Function, which computes the mean energy transfer rate to delta rays
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| 127 | G4double DeltaRayMeanEnergyTransferRate(
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| 128 | const G4Material*, // Target Material
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| 129 | const G4ParticleDefinition*, // Projectile
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| 130 | G4double, // Kinetic energy of projectile
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| 131 | G4double); // Energy cut for secondary prod.
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| 132 |
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| 133 |
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| 134 | virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
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| 135 | const G4MaterialCutsCouple*,
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| 136 | const G4DynamicParticle*,
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| 137 | G4double, // Energy cut for secondary prod.
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| 138 | G4double); // Maximum energy of secondaries
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| 139 |
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| 140 | virtual G4double GetChargeSquareRatio(
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| 141 | const G4ParticleDefinition*, // Projectile
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| 142 | const G4Material*, // Target Material
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| 143 | G4double); // Kinetic energy of projectile
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| 144 |
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| 145 | virtual G4double GetParticleCharge(
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| 146 | const G4ParticleDefinition*, // Projectile
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| 147 | const G4Material*, // Target Material
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| 148 | G4double); // Kinetic energy of projectile
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| 149 |
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| 150 | virtual void CorrectionsAlongStep(
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| 151 | const G4MaterialCutsCouple*,// Mat.-Cut couple
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| 152 | const G4DynamicParticle*, // Dyn. particle
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| 153 | G4double&, // Energy loss in current step
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| 154 | G4double&,
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| 155 | G4double); // Length of current step
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| 156 |
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| 157 | G4double GetRange(const G4ParticleDefinition*, // Projectile
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| 158 | const G4Material*, // Target Material
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| 159 | G4double); // Kinetic energy
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| 160 |
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| 161 | // Function which allows to add additional stopping power tables
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| 162 | // in combination with a scaling algorithm, which may depend on dynamic
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| 163 | // information like the current particle energy (the table and scaling
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| 164 | // algorithm are used via a handler class, which performs e.g.caching or
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| 165 | // which applies the scaling of energy and dE/dx values)
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| 166 | G4bool AddDEDXTable(const G4String& name,
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| 167 | G4VIonDEDXTable* table,
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| 168 | G4VIonDEDXScalingAlgorithm* algorithm = 0);
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| 169 |
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| 170 | G4bool RemoveDEDXTable(const G4String& name);
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| 171 |
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| 172 | // Function checking the applicability of physics tables to ion-material
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| 173 | // combinations (Note: the energy range of tables is not checked)
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| 174 | LossTableList::iterator IsApplicable(
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| 175 | const G4ParticleDefinition*, // Projectile (ion)
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| 176 | const G4Material*); // Target material
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| 177 |
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| 178 | // Function printing a dE/dx table for a given ion-material combination
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| 179 | // and a specified energy grid
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| 180 | void PrintDEDXTable(
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| 181 | const G4ParticleDefinition*, // Projectile (ion)
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| 182 | const G4Material*, // Absorber material
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| 183 | G4double, // Minimum energy per nucleon
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| 184 | G4double, // Maximum energy per nucleon
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| 185 | G4int, // Number of bins
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| 186 | G4bool); // Logarithmic scaling of energy
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| 187 |
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| 188 | // Function printing a dE/dx table for a given ion-material combination
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| 189 | // and a specified energy grid
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| 190 | void PrintDEDXTableHandlers(
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| 191 | const G4ParticleDefinition*, // Projectile (ion)
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| 192 | const G4Material*, // Absorber material
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| 193 | G4double, // Minimum energy per nucleon
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| 194 | G4double, // Maximum energy per nucleon
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| 195 | G4int, // Number of bins
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| 196 | G4bool); // Logarithmic scaling of energy
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| 197 |
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| 198 | protected:
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| 199 | G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
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| 200 | G4double); // Kinetic energy of projectile
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| 201 |
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| 202 | private:
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| 203 | // Function which updates parameters concerning the dE/dx calculation
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| 204 | // (the parameters are only updated if the particle, the material or
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| 205 | // the associated energy cut has changed)
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| 206 | void UpdateDEDXCache(
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| 207 | const G4ParticleDefinition*, // Projectile (ion)
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| 208 | const G4Material*, // Target material
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| 209 | G4double cutEnergy); // Energy cut
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| 210 |
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| 211 | // Function, which updates parameters concering particle properties
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| 212 | void UpdateCache(
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| 213 | const G4ParticleDefinition*); // Projectile (ion)
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| 214 |
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| 215 | // Function, which builds range vs energy (and energy vs range) vectors
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| 216 | // for a given particle, material and energy cut
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| 217 | void BuildRangeVector(
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| 218 | const G4ParticleDefinition*, // Projectile (ion)
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| 219 | const G4Material*, // Target material
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| 220 | G4double); // Energy cut
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| 221 |
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| 222 | // Assignment operator and copy constructor are hidden:
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| 223 | G4IonParametrisedLossModel & operator=(
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| 224 | const G4IonParametrisedLossModel &right);
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| 225 | G4IonParametrisedLossModel(const G4IonParametrisedLossModel &);
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| 226 |
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| 227 | // ######################################################################
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| 228 | // # Models and dE/dx tables for computing the energy loss
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| 229 | // #
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| 230 | // ######################################################################
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| 231 |
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| 232 | // G4BraggIonModel and G4BetheBlochModel are used for ion-target
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| 233 | // combinations and/or projectile energies not covered by parametrisations
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| 234 | // adopted by this model:
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| 235 | G4BraggIonModel* braggIonModel;
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| 236 | G4BetheBlochModel* betheBlochModel;
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| 237 |
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| 238 | // List of dE/dx tables plugged into the model
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| 239 | LossTableList lossTableList;
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| 240 |
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| 241 | // ######################################################################
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| 242 | // # Maps of Range vs Energy and Energy vs Range vectors
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| 243 | // #
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| 244 | // ######################################################################
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| 245 |
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| 246 | typedef std::map<IonMatCouple, G4LPhysicsFreeVector*> RangeEnergyTable;
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| 247 | RangeEnergyTable r;
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| 248 |
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| 249 | typedef std::map<IonMatCouple, G4LPhysicsFreeVector*> EnergyRangeTable;
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| 250 | EnergyRangeTable E;
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| 251 |
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| 252 | // ######################################################################
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| 253 | // # Energy grid definitions (e.g. used for computing range-energy
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| 254 | // # tables)
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| 255 | // ######################################################################
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| 256 |
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| 257 | G4double lowerEnergyEdgeIntegr;
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| 258 | G4double upperEnergyEdgeIntegr;
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| 259 |
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| 260 | size_t nmbBins;
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| 261 | size_t nmbSubBins;
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| 262 |
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| 263 | // ######################################################################
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| 264 | // # Particle change for loss
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| 265 | // #
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| 266 | // ######################################################################
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| 267 |
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| 268 | // Pointer to particle change object, which is used to set e.g. the
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| 269 | // energy loss due to nuclear stopping
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| 270 | G4ParticleChangeForLoss* particleChangeLoss;
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| 271 |
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| 272 | // Flag indicating if model is initialized (i.e. if
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| 273 | // G4ParticleChangeForLoss was created)
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| 274 | G4bool modelIsInitialised;
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| 275 |
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| 276 | // ######################################################################
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| 277 | // # Corrections and energy loss limit
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| 278 | // #
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| 279 | // ######################################################################
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| 280 |
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| 281 | // Pointer to an G4EmCorrections object, which is used to compute the
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| 282 | // effective ion charge, and other corrections (like high order corrections
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| 283 | // to stopping powers)
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| 284 | G4EmCorrections* corrections;
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| 285 |
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| 286 | // Corrections factor for effective charge, computed for each particle
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| 287 | // step
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| 288 | G4double corrFactor;
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| 289 |
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| 290 | // Parameter indicating the maximal fraction of kinetic energy, which
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| 291 | // a particle may loose along a step, in order that the simple relation
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| 292 | // (dE/dx)*l can still be applied to compute the energy loss (l = step
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| 293 | // length)
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| 294 | G4double energyLossLimit;
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| 295 |
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| 296 | // ######################################################################
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| 297 | // # Cut energies and properties of generic ion
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| 298 | // #
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| 299 | // ######################################################################
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| 300 |
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| 301 | // Vector containing the current cut energies (the vector index matches
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| 302 | // the material-cuts couple index):
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| 303 | G4DataVector cutEnergies;
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| 304 |
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| 305 | // Pointer to generic ion and mass of generic ion
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| 306 | G4ParticleDefinition* genericIon;
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| 307 | G4double genericIonPDGMass;
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| 308 |
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| 309 | // ######################################################################
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| 310 | // # "Most-recently-used" cache parameters
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| 311 | // #
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| 312 | // ######################################################################
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| 313 |
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| 314 | // Cached key (particle) and value information for a faster
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| 315 | // access of particle-related information
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| 316 | const G4ParticleDefinition* cacheParticle; // Key: Current projectile
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| 317 | G4double cacheMass; // Projectile mass
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| 318 | G4double cacheElecMassRatio; // Electron-mass ratio
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| 319 | G4double cacheChargeSquare; // Charge squared
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| 320 |
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| 321 | // Cached parameters needed during dE/dx computations:
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| 322 | const G4ParticleDefinition* dedxCacheParticle; // Key: 1) Current ion,
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| 323 | const G4Material* dedxCacheMaterial; // 2) material and
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| 324 | G4double dedxCacheEnergyCut; // 3) cut energy
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| 325 | LossTableList::iterator dedxCacheIter; // Responsible dE/dx table
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| 326 | G4PhysicsVector* dedxCacheEnergyRange; // Energy vs range vector
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| 327 | G4PhysicsVector* dedxCacheRangeEnergy; // Range vs energy vector
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| 328 | G4double dedxCacheTransitionEnergy; // Transition energy between
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| 329 | // parameterization and
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| 330 | // Bethe-Bloch model
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| 331 | G4double dedxCacheTransitionFactor; // Factor for smoothing the dE/dx
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| 332 | // values in the transition region
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| 333 | G4double dedxCacheGenIonMassRatio; // Ratio of generic ion mass
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| 334 | // and current particle mass
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| 335 | };
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| 336 |
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| 337 |
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| 338 | #include "G4IonParametrisedLossModel.icc"
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| 339 |
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| 340 | #endif
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