Geant4 11.2.2
Toolkit for the simulation of the passage of particles through matter
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Public Member Functions | List of all members
G4MicroElecLOPhononModel Class Reference

#include <G4MicroElecLOPhononModel.hh>

+ Inheritance diagram for G4MicroElecLOPhononModel:

Public Member Functions

 G4MicroElecLOPhononModel (const G4ParticleDefinition *p=nullptr, const G4String &nam="G4MicroElecLOPhononModel")
 
 ~G4MicroElecLOPhononModel () override=default
 
void Initialise (const G4ParticleDefinition *, const G4DataVector &) override
 
G4double CrossSectionPerVolume (const G4Material *material, const G4ParticleDefinition *p, G4double ekin, G4double emin=0.0, G4double emax=DBL_MAX) override
 
void SampleSecondaries (std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin=0.0, G4double maxEnergy=DBL_MAX) override
 
G4MicroElecLOPhononModel & operator= (const G4MicroElecLOPhononModel &)=delete
 
 G4MicroElecLOPhononModel (const G4MicroElecLOPhononModel &)=delete
 
- Public Member Functions inherited from G4VEmModel
 G4VEmModel (const G4String &nam)
 
virtual ~G4VEmModel ()
 
virtual void InitialiseLocal (const G4ParticleDefinition *, G4VEmModel *masterModel)
 
virtual void InitialiseForMaterial (const G4ParticleDefinition *, const G4Material *)
 
virtual void InitialiseForElement (const G4ParticleDefinition *, G4int Z)
 
virtual G4double ComputeDEDXPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
 
virtual G4double GetPartialCrossSection (const G4Material *, G4int level, const G4ParticleDefinition *, G4double kineticEnergy)
 
virtual G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual G4double ComputeCrossSectionPerShell (const G4ParticleDefinition *, G4int Z, G4int shellIdx, G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
virtual G4double ChargeSquareRatio (const G4Track &)
 
virtual G4double GetChargeSquareRatio (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual G4double GetParticleCharge (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual void StartTracking (G4Track *)
 
virtual void CorrectionsAlongStep (const G4MaterialCutsCouple *, const G4DynamicParticle *, const G4double &length, G4double &eloss)
 
virtual G4double Value (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy)
 
virtual G4double MinPrimaryEnergy (const G4Material *, const G4ParticleDefinition *, G4double cut=0.0)
 
virtual G4double MinEnergyCut (const G4ParticleDefinition *, const G4MaterialCutsCouple *)
 
virtual void SetupForMaterial (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
 
virtual void DefineForRegion (const G4Region *)
 
virtual void FillNumberOfSecondaries (G4int &numberOfTriplets, G4int &numberOfRecoil)
 
virtual void ModelDescription (std::ostream &outFile) const
 
void InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)
 
std::vector< G4EmElementSelector * > * GetElementSelectors ()
 
void SetElementSelectors (std::vector< G4EmElementSelector * > *)
 
G4double ComputeDEDX (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
 
G4double CrossSection (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4double ComputeMeanFreePath (const G4ParticleDefinition *, G4double kineticEnergy, const G4Material *, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
G4double ComputeCrossSectionPerAtom (const G4ParticleDefinition *, const G4Element *, G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * SelectRandomAtom (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * SelectTargetAtom (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double logKineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * SelectRandomAtom (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
 
const G4Element * GetCurrentElement (const G4Material *mat=nullptr) const
 
G4int SelectRandomAtomNumber (const G4Material *) const
 
const G4Isotope * GetCurrentIsotope (const G4Element *elm=nullptr) const
 
G4int SelectIsotopeNumber (const G4Element *) const
 
void SetParticleChange (G4VParticleChange *, G4VEmFluctuationModel *f=nullptr)
 
void SetCrossSectionTable (G4PhysicsTable *, G4bool isLocal)
 
G4ElementData * GetElementData ()
 
G4PhysicsTable * GetCrossSectionTable ()
 
G4VEmFluctuationModel * GetModelOfFluctuations ()
 
G4VEmAngularDistribution * GetAngularDistribution ()
 
G4VEmModel * GetTripletModel ()
 
void SetTripletModel (G4VEmModel *)
 
void SetAngularDistribution (G4VEmAngularDistribution *)
 
G4double HighEnergyLimit () const
 
G4double LowEnergyLimit () const
 
G4double HighEnergyActivationLimit () const
 
G4double LowEnergyActivationLimit () const
 
G4double PolarAngleLimit () const
 
G4double SecondaryThreshold () const
 
G4bool DeexcitationFlag () const
 
G4bool ForceBuildTableFlag () const
 
G4bool UseAngularGeneratorFlag () const
 
void SetAngularGeneratorFlag (G4bool)
 
void SetHighEnergyLimit (G4double)
 
void SetLowEnergyLimit (G4double)
 
void SetActivationHighEnergyLimit (G4double)
 
void SetActivationLowEnergyLimit (G4double)
 
G4bool IsActive (G4double kinEnergy) const
 
void SetPolarAngleLimit (G4double)
 
void SetSecondaryThreshold (G4double)
 
void SetDeexcitationFlag (G4bool val)
 
void SetForceBuildTable (G4bool val)
 
void SetFluctuationFlag (G4bool val)
 
void SetMasterThread (G4bool val)
 
G4bool IsMaster () const
 
void SetUseBaseMaterials (G4bool val)
 
G4bool UseBaseMaterials () const
 
G4double MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)
 
const G4String & GetName () const
 
void SetCurrentCouple (const G4MaterialCutsCouple *)
 
G4bool IsLocked () const
 
void SetLocked (G4bool)
 
void SetLPMFlag (G4bool)
 
G4VEmModel & operator= (const G4VEmModel &right)=delete
 
 G4VEmModel (const G4VEmModel &)=delete
 

Additional Inherited Members

- Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss * GetParticleChangeForLoss ()
 
G4ParticleChangeForGamma * GetParticleChangeForGamma ()
 
virtual G4double MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kineticEnergy)
 
const G4MaterialCutsCouple * CurrentCouple () const
 
void SetCurrentElement (const G4Element *)
 
- Protected Attributes inherited from G4VEmModel
G4ElementData * fElementData = nullptr
 
G4VParticleChange * pParticleChange = nullptr
 
G4PhysicsTable * xSectionTable = nullptr
 
const G4Material * pBaseMaterial = nullptr
 
const std::vector< G4double > * theDensityFactor = nullptr
 
const std::vector< G4int > * theDensityIdx = nullptr
 
G4double inveplus
 
G4double pFactor = 1.0
 
std::size_t currentCoupleIndex = 0
 
std::size_t basedCoupleIndex = 0
 
G4bool lossFlucFlag = true
 

Detailed Description

Definition at line 57 of file G4MicroElecLOPhononModel.hh.

Constructor & Destructor Documentation

◆ G4MicroElecLOPhononModel() [1/2]

G4MicroElecLOPhononModel::G4MicroElecLOPhononModel ( const G4ParticleDefinition * p = nullptr,
const G4String & nam = "G4MicroElecLOPhononModel" )
explicit

Definition at line 60 of file G4MicroElecLOPhononModel.cc.

62 : G4VEmModel(nam),isInitialised(false)
63{
64 G4cout << "Phonon model is constructed " << G4endl
65 << "Phonon Energy = " << phononEnergy / eV << " eV "<< G4endl;
66}
G4endl
#define G4endl
Definition G4ios.hh:67
G4cout
G4GLOB_DLL std::ostream G4cout
G4VEmModel::G4VEmModel
G4VEmModel(const G4String &nam)
Definition G4VEmModel.cc:67

◆ ~G4MicroElecLOPhononModel()

G4MicroElecLOPhononModel::~G4MicroElecLOPhononModel ( )
overridedefault

◆ G4MicroElecLOPhononModel() [2/2]

G4MicroElecLOPhononModel::G4MicroElecLOPhononModel ( const G4MicroElecLOPhononModel & )
delete

Member Function Documentation

◆ CrossSectionPerVolume()

G4double G4MicroElecLOPhononModel::CrossSectionPerVolume ( const G4Material * material,
const G4ParticleDefinition * p,
G4double ekin,
G4double emin = 0.0,
G4double emax = DBL_MAX )
overridevirtual

Reimplemented from G4VEmModel.

Definition at line 80 of file G4MicroElecLOPhononModel.cc.

85{
86 const G4double e = CLHEP::eplus / CLHEP::coulomb;
87 const G4double m0 = CLHEP::electron_mass_c2 / (CLHEP::c_squared*CLHEP::kg);
88 const G4double h = CLHEP::hbar_Planck * CLHEP::s/ (CLHEP::m2*CLHEP::kg);
89 const G4double eps0 = CLHEP::epsilon0 * CLHEP::m/ (CLHEP::farad);
90 const G4double kb = CLHEP::k_Boltzmann * CLHEP::kelvin/ CLHEP::joule;
91 const G4double T = 300;
92 G4double eps = 9;
93 G4double einf = 3;
94
95 const G4DataVector cuts;
96 Initialise(p, cuts);
97
98 if (material->GetName() != "G4_SILICON_DIOXIDE"
99 && material->GetName() != "G4_ALUMINUM_OXIDE"
100 && material->GetName() != "G4_BORON_NITRIDE")
101 {
102 return 1 / DBL_MAX;
103 }
104
105 G4double E =(ekin/eV)*e;
106
107 if (material->GetName() == "G4_ALUMINUM_OXIDE")
108 {
109 eps = 9;
110 einf = 3;
111 phononEnergy = 0.1*eV;
112 }
113 if (material->GetName() == "G4_SILICON_DIOXIDE")
114 {
115 eps = 3.84;
116 einf = 2.25;
117 phononEnergy = (0.75*0.153+0.25*0.063 )* eV;
118 }
119
120 // Nuclear Instruments and Methods in Physics Research Section B:
121 // Beam Interactions with Materials and Atoms
122 // Volume 454, 1 September 2019, Pages 14 - 22
123 // Nuclear Instruments and Methods in Physics Research Section B:
124 // Beam Interactions with Materials and Atoms
125 // Monte Carlo modeling of low - energy electron - induced secondary
126 // electron emission yields in micro - architected boron nitride surfaces
127
128 if (material->GetName() == "G4_BORON_NITRIDE")
129 {
130 eps = 7.1;
131 einf = 4.5;
132 phononEnergy = 0.17 * eV;
133 }
134
135 G4double hw = (phononEnergy / eV) * e;
136 G4double n = 1.0 / (std::exp(hw / (kb*T)) - 1); //Phonon distribution
137
138 if (absor) // Absorption
139 {
140 Eprim = E + hw;
141 signe = -1;
142 }
143 else // Emission
144 {
145 Eprim = E - hw;
146 signe = +1;
147 }
148
149 G4double racine = std::sqrt(1 + ((-signe*hw) / E));
150 G4double P = (std::pow(e, 2) / (4 * pi*eps0*h*h)) * (n + 0.5 + signe*0.5) * ((1 / einf) - (1 / eps)) * std::sqrt(m0 / (2 * E)) *hw* std::log((1 + racine) / (signe * 1 + ((-signe)*racine)));
151 G4double MFP = (std::sqrt(2 * E / m0) / P)*m;
152
153 if (material->GetName() == "G4_SILICON_DIOXIDE") { return 2 / MFP; }
154 return 1/(MFP);
155 // correction CI 12/1/2023 add
156}
G4double
double G4double
Definition G4Types.hh:83
G4Material::GetName
const G4String & GetName() const
Definition G4Material.hh:171
G4MicroElecLOPhononModel::Initialise
void Initialise(const G4ParticleDefinition *, const G4DataVector &) override
Definition G4MicroElecLOPhononModel.cc:70
DBL_MAX
#define DBL_MAX
Definition templates.hh:62

◆ Initialise()

void G4MicroElecLOPhononModel::Initialise ( const G4ParticleDefinition * ,
const G4DataVector &  )
overridevirtual

Implements G4VEmModel.

Definition at line 70 of file G4MicroElecLOPhononModel.cc.

72{
73 if (isInitialised) { return; }
74 fParticleChangeForGamma = GetParticleChangeForGamma();
75 isInitialised = true;
76}
G4VEmModel::GetParticleChangeForGamma
G4ParticleChangeForGamma * GetParticleChangeForGamma()
Definition G4VEmModel.cc:120

Referenced by CrossSectionPerVolume().

◆ operator=()

G4MicroElecLOPhononModel & G4MicroElecLOPhononModel::operator= ( const G4MicroElecLOPhononModel & )
delete

◆ SampleSecondaries()

void G4MicroElecLOPhononModel::SampleSecondaries ( std::vector< G4DynamicParticle * > * ,
const G4MaterialCutsCouple * ,
const G4DynamicParticle * aDynamicElectron,
G4double tmin = 0.0,
G4double maxEnergy = DBL_MAX )
overridevirtual

Implements G4VEmModel.

Definition at line 160 of file G4MicroElecLOPhononModel.cc.

165{
166 G4double E = aDynamicElectron->GetKineticEnergy();
167 Eprim = (absor) ? E + phononEnergy : E - phononEnergy;
168
169 G4double rand = G4UniformRand();
170 G4double B = (E + Eprim + 2 * std::sqrt(E*Eprim))
171 / (E + Eprim - 2 * std::sqrt(E*Eprim));
172 G4double cosTheta = ((E + Eprim) / (2 * std::sqrt(E*Eprim)))
173 * (1 - std::pow(B, rand)) + std::pow(B, rand);
174 if(Interband)
175 {
176 cosTheta = 1 - 2 * G4UniformRand(); //Isotrope
177 }
178 G4double phi = twopi * G4UniformRand();
179 G4ThreeVector zVers = aDynamicElectron->GetMomentumDirection();
180 G4ThreeVector xVers = zVers.orthogonal();
181 G4ThreeVector yVers = zVers.cross(xVers);
182
183 G4double xDir = std::sqrt(1. - cosTheta*cosTheta);
184 G4double yDir = xDir;
185 xDir *= std::cos(phi);
186 yDir *= std::sin(phi);
187
188 G4ThreeVector zPrimeVers((xDir*xVers + yDir*yVers + cosTheta*zVers));
189
190 fParticleChangeForGamma->ProposeMomentumDirection(zPrimeVers.unit());
191 fParticleChangeForGamma->SetProposedKineticEnergy(Eprim);
192}
B
G4double B(G4double temperature)
Definition G4DNAElectronHoleRecombination.cc:71
G4UniformRand
#define G4UniformRand()
Definition Randomize.hh:52
CLHEP::Hep3Vector::orthogonal
Hep3Vector orthogonal() const
CLHEP::Hep3Vector::cross
Hep3Vector cross(const Hep3Vector &) const
G4DynamicParticle::GetMomentumDirection
const G4ThreeVector & GetMomentumDirection() const
G4DynamicParticle::GetKineticEnergy
G4double GetKineticEnergy() const
G4ParticleChangeForGamma::SetProposedKineticEnergy
void SetProposedKineticEnergy(G4double proposedKinEnergy)
Definition G4ParticleChangeForGamma.hh:106
G4ParticleChangeForGamma::ProposeMomentumDirection
void ProposeMomentumDirection(const G4ThreeVector &Pfinal)
Definition G4ParticleChangeForGamma.hh:120
The documentation for this class was generated from the following files: