Concrete monopole ionisation model. More...

#include <G4mplIonisationWithDeltaModel.h>

Inheritance diagram for G4mplIonisationWithDeltaModel:

Collaboration diagram for G4mplIonisationWithDeltaModel:

[legend]

Public Member Functions
	G4mplIonisationWithDeltaModel (G4double mCharge, const G4String &nam="mplIonisationWithDelta")
	Constructor. More...

virtual	~G4mplIonisationWithDeltaModel ()
	Destructor.

virtual void	Initialise (const G4ParticleDefinition *p, const G4DataVector &) override
	G4VEmModel::Initialise implementation. More...

virtual G4double	ComputeDEDXPerVolume (const G4Material material, const G4ParticleDefinition p, G4double kineticEnergy, G4double maxEnergy) override
	G4VEmModel::ComputeDEDXPerVolume implementation. More...

virtual G4double	ComputeCrossSectionPerElectron (const G4ParticleDefinition *p, G4double kineticEnergy, G4double cutEnergy, G4double maxEnergy)
	Compute cross section per electron for delta electrons emission. More...

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *p, G4double kineticEnergy, G4double Z, G4double A, G4double cutEnergy, G4double maxEnergy) override
	Compute cross section per atom for delta electrons emission. More...

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > vdp, const G4MaterialCutsCouple materialCutsCouple, const G4DynamicParticle *dp, G4double tmin, G4double maxEnergy) override
	Create the sample of secondary delta electrons. More...

virtual G4double	SampleFluctuations (const G4MaterialCutsCouple couple, const G4DynamicParticle dp, G4double tmax, G4double length, G4double meanLoss) override
	Create fluctuations in the energies lost to a secondary delta electron. More...

virtual G4double	Dispersion (const G4Material material, const G4DynamicParticle , G4double tmax, G4double length) override
	Calculate dispersion. More...

virtual G4double	MinEnergyCut (const G4ParticleDefinition , const G4MaterialCutsCouple couple) override
	Threshold for zero value.

void	SetParticle (const G4ParticleDefinition *p)
	Read definition of the monopole.

Protected Member Functions
virtual G4double	MaxSecondaryEnergy (const G4ParticleDefinition *p, G4double kinEnergy) override
	Calculate maximum energy available for secondary particle emission. More...

Private Member Functions
G4double	ComputeDEDXAhlen (const G4Material *material, G4double bg2, G4double cut)
	Caculate dedx based on extrapolated Ahlen formula. More...

G4mplIonisationWithDeltaModel &	operator= (const G4mplIonisationWithDeltaModel &right)=delete
	Assignment operator should be hidden. More...

	G4mplIonisationWithDeltaModel (const G4mplIonisationWithDeltaModel &copy)=delete
	Copy constructor should be hidden. More...

Private Attributes
const G4ParticleDefinition *	monopole
	Monopole definition.

G4ParticleDefinition *	theElectron
	Electron definition.

G4ParticleChangeForLoss *	fParticleChange
	Pointer to ionising particle.

G4double	mass
	Mass of the monopole.

G4double	magCharge
	Monopole magnetic charge in e+ units.

G4double	twoln10
	log(100.0)

G4double	betalow
	Beta threshold for low asymptotic.

G4double	betalim
	Beta threshold for high energy (only Ahlen formula)

G4double	beta2lim
	Square of betalim.

G4double	bg2lim
	(beta*gamma)^2 for betalim

G4double	chargeSquare
	Square of magnetic charge in units of Dirac charge.

G4double	dedxlim
	dedx limit in asymptotic formula, not used

G4double	pi_hbarc2_over_mc2
	Convenient constants combination with mass.

G4double	nmpl
	Magn. More...

Static Private Attributes
static std::vector< G4double > *	dedx0 = nullptr
	Base dedx for each couple in current material.

Detailed Description

Concrete monopole ionisation model.

Monopole magnetic ionisation dedx is similar to electric one with the exception of beta*beta factor. This model is also capable of producing secondary delta electrons.

Definition at line 36 of file G4mplIonisationWithDeltaModel.h.

Constructor & Destructor Documentation

◆ G4mplIonisationWithDeltaModel() [1/2]

G4mplIonisationWithDeltaModel	(	G4double	mCharge,
		const G4String &	nam = `"mplIonisationWithDelta"`
	)

explicit

Constructor.

Parameters

mCharge	Magnetic charge of the monopole, in e+ units
nam	Name of the ionisation process in GEANT4

Definition at line 43 of file G4mplIonisationWithDeltaModel.cc.

   : G4VEmModel(nam), G4VEmFluctuationModel(nam),
     magCharge(mCharge),
     twoln10(log(100.0)),
     betalow(0.01),
     betalim(0.1),
     beta2lim(betalim * betalim),
     bg2lim(beta2lim * (1.0 + beta2lim)),
     pi_hbarc2_over_mc2(pi * hbarc * hbarc / electron_mass_c2)
 {
   nmpl = magCharge * 2 * fine_structure_const;
   chargeSquare = magCharge * magCharge * 4 * fine_structure_const *
                  fine_structure_const;
   //NOTE Formulas below assume Dirac charge units for magnetic charge, g_D = 68.5e
   dedxlim = 45. * chargeSquare * GeV * cm2 / g;
   fParticleChange = nullptr;
   theElectron = G4Electron::Electron();
   B2INFO("Monopole ionisation model with d-electron production, Gmag= "  << magCharge / eplus);
   if (nmpl >= 6)
     B2WARNING("Monopole charge Gmag= " << magCharge / eplus << "e not reasonable. Please choose a value smaller than 411e.");
   monopole = nullptr;
   mass = 0.0;
 }

◆ G4mplIonisationWithDeltaModel() [2/2]

G4mplIonisationWithDeltaModel ( const G4mplIonisationWithDeltaModel & copy )

privatedelete

Copy constructor should be hidden.

Parameters

copy	Copy reference

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	Z,
		G4double	A,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

overridevirtual

Compute cross section per atom for delta electrons emission.

Parameters

p	Pointer to monopole definition
kineticEnergy	Monopole kinetic energy value
Z	Atomic charge
A	This argument of base function is ignored
cutEnergy	Cut energy for ionisation process
maxEnergy	Maximum energy of secondary electron

Returns: Cross section

Definition at line 216 of file G4mplIonisationWithDeltaModel.cc.

◆ ComputeCrossSectionPerElectron()

G4double ComputeCrossSectionPerElectron	(	const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	cutEnergy,
		G4double	maxEnergy
	)

virtual

Compute cross section per electron for delta electrons emission.

Parameters

p	Pointer to monopole definition
kineticEnergy	Monopole kinetic energy value
cutEnergy	Cut energy for ionisation process
maxEnergy	Maximum energy of secondary electron

Returns: Cross section

Definition at line 198 of file G4mplIonisationWithDeltaModel.cc.

◆ ComputeDEDXAhlen()

G4double ComputeDEDXAhlen	(	const G4Material *	material,
		G4double	bg2,
		G4double	cut
	)

private

Caculate dedx based on extrapolated Ahlen formula.

References [1] Steven P. Ahlen: Energy loss of relativistic heavy ionizing particles, S.P. Ahlen, Rev. Mod. Phys 52(1980), p121 [2] K.A. Milton arXiv:hep-ex/0602040 [3] S.P. Ahlen and K. Kinoshita, Phys. Rev. D26 (1982) 2347

Parameters

material	Pointer to the material of current volume
bg2	(beta*gamma)^2
cut	Cut energy for ionisation process

Returns: dedx magnitude

Definition at line 163 of file G4mplIonisationWithDeltaModel.cc.

◆ ComputeDEDXPerVolume()

G4double ComputeDEDXPerVolume	(	const G4Material *	material,
		const G4ParticleDefinition *	p,
		G4double	kineticEnergy,
		G4double	maxEnergy
	)

overridevirtual

G4VEmModel::ComputeDEDXPerVolume implementation.

Combines dedx estimation from extrapolated Ahlen formula and formula for low beta.

Parameters

material	Pointer to the material of current volume
p	Pointer to monopole definition
kineticEnergy	Monopole kinetic energy value
maxEnergy	Maximum energy of secondary electron

Returns: dedx magnitude

Definition at line 121 of file G4mplIonisationWithDeltaModel.cc.

◆ Dispersion()

G4double Dispersion	(	const G4Material *	material,
		const G4DynamicParticle *	dp,
		G4double	tmax,
		G4double	length
	)

overridevirtual

Calculate dispersion.

Parameters

material	Pointer to current material definition
dp	Secnodary particle pointer
tmax	Tmax in dispersion formula?
length	Length in dispersion formula?

Returns: Dispersion

Definition at line 310 of file G4mplIonisationWithDeltaModel.cc.

◆ Initialise()

void Initialise	(	const G4ParticleDefinition *	p,
		const G4DataVector &
	)

overridevirtual

G4VEmModel::Initialise implementation.

Parameters

p	Monopole definition pointer.

Definition at line 86 of file G4mplIonisationWithDeltaModel.cc.

◆ MaxSecondaryEnergy()

G4double MaxSecondaryEnergy	(	const G4ParticleDefinition *	p,
		G4double	kinEnergy
	)

overrideprotectedvirtual

Calculate maximum energy available for secondary particle emission.

Parameters

p	This argument of base function is ignored
kinEnergy	Kinetic energy of the ionising particle

Returns: Maximum energy available for secondary particle emission

Definition at line 328 of file G4mplIonisationWithDeltaModel.cc.

◆ operator=()

G4mplIonisationWithDeltaModel& operator= ( const G4mplIonisationWithDeltaModel & right )

privatedelete

Assignment operator should be hidden.

Parameters

right Assign reference

◆ SampleFluctuations()

G4double SampleFluctuations	(	const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	dp,
		G4double	tmax,
		G4double	length,
		G4double	meanLoss
	)

overridevirtual

Create fluctuations in the energies lost to a secondary delta electron.

Parameters

couple	Current volume coulple to get its material
dp	Secnodary particle pointer
tmax	Tmax in dispersion formula?
length	Length in dispersion formula?
meanLoss	Mean of energy loss

Returns: Fluctuated loss

Definition at line 281 of file G4mplIonisationWithDeltaModel.cc.

◆ SampleSecondaries()

void SampleSecondaries	(	std::vector< G4DynamicParticle * > *	vdp,
		const G4MaterialCutsCouple *	materialCutsCouple,
		const G4DynamicParticle *	dp,
		G4double	tmin,
		G4double	maxEnergy
	)

overridevirtual

Create the sample of secondary delta electrons.

Parameters

vdp	Pointer to the storage of sampled delta electrons
materialCutsCouple	This argument of base function is ignored
dp	Secnodary particle pointer
tmin	Minimal energy of secondary electrons
maxEnergy	Maximum energy of secondary electrons

Definition at line 229 of file G4mplIonisationWithDeltaModel.cc.

Member Data Documentation

◆ nmpl

G4double nmpl

private

Magn.

charge in units of Dirac charge g_D, nmpl=1 -> g = g_D

Definition at line 225 of file G4mplIonisationWithDeltaModel.h.

The documentation for this class was generated from the following files:

simulation/monopoles/include/G4mplIonisationWithDeltaModel.h
simulation/monopoles/src/G4mplIonisationWithDeltaModel.cc

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ G4mplIonisationWithDeltaModel() [1/2]

◆ G4mplIonisationWithDeltaModel() [2/2]

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

◆ ComputeCrossSectionPerElectron()

◆ ComputeDEDXAhlen()

◆ ComputeDEDXPerVolume()

◆ Dispersion()

◆ Initialise()

◆ MaxSecondaryEnergy()

◆ operator=()

◆ SampleFluctuations()

◆ SampleSecondaries()

Member Data Documentation

◆ nmpl