SSCAHelper Class Reference

Collaboration diagram for SSCAHelper:

Public Member Functions
	SSCAHelper (double kappa)
void	init (const std::vector< FormFactorCoherentSum > &ff_wrappers)
complex_t	getCharacteristicSizeCoupling (double qp, const std::vector< FormFactorCoherentSum > &ff_wrappers) const
complex_t	getCharacteristicDistribution (double qp, const IInterferenceFunction *p_iff) const
complex_t	calculatePositionOffsetPhase (double qp, double radial_extension) const
complex_t	getMeanFormfactorNorm (double qp, const std::vector< complex_t > &precomputed_ff, const std::vector< FormFactorCoherentSum > &ff_wrappers) const
void	getMeanFormfactors (double qp, Eigen::Matrix2cd &ff_orig, Eigen::Matrix2cd &ff_conj, const InterferenceFunctionUtils::matrixFFVector_t &precomputed_ff, const std::vector< FormFactorCoherentSum > &ff_wrappers) const

Private Attributes
double	m_kappa
double	m_mean_radius

Detailed Description

Helper class for SSCApproximationStrategy, offering some methods, shared between the scalar and polarized scattering calculations.

Definition at line 29 of file SSCAHelper.h.

Constructor & Destructor Documentation

SSCAHelper()

SSCAHelper::SSCAHelper

(

double

kappa

)

Definition at line 20 of file SSCAHelper.cpp.

: m_kappa(kappa), m_mean_radius{} {}

Member Function Documentation

init()

void SSCAHelper::init

(

const std::vector< FormFactorCoherentSum > &

ff_wrappers

)

Definition at line 22 of file SSCAHelper.cpp.

{
    m_mean_radius = 0.0;
    for (auto& ffw : ff_wrappers)
        m_mean_radius += ffw.relativeAbundance() * ffw.radialExtension();
}

References m_mean_radius.

Referenced by SSCApproximationStrategy::strategy_specific_post_init().

getCharacteristicSizeCoupling()

complex_t SSCAHelper::getCharacteristicSizeCoupling	(	double	qp,
		const std::vector< FormFactorCoherentSum > &	ff_wrappers
	)		const

Definition at line 29 of file SSCAHelper.cpp.

{
    complex_t result{};
    for (auto& ffw : ff_wrappers) {
        double radial_extension = ffw.radialExtension();
        result +=
            ffw.relativeAbundance() * calculatePositionOffsetPhase(2.0 * qp, radial_extension);
    }
    return result;
}

References calculatePositionOffsetPhase().

Referenced by SSCApproximationStrategy::polarizedCalculation(), and SSCApproximationStrategy::scalarCalculation().

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getCharacteristicDistribution()

complex_t SSCAHelper::getCharacteristicDistribution	(	double	qp,
		const IInterferenceFunction *	p_iff
	)		const

Definition at line 41 of file SSCAHelper.cpp.

{
    const InterferenceFunctionRadialParaCrystal* p_iff_radial =
        dynamic_cast<const InterferenceFunctionRadialParaCrystal*>(p_iff);
    if (!p_iff_radial)
        throw Exceptions::ClassInitializationException("Wrong interference function for SSCA");
    return p_iff_radial->FTPDF(qp);
}

References InterferenceFunctionRadialParaCrystal::FTPDF().

Referenced by SSCApproximationStrategy::polarizedCalculation(), and SSCApproximationStrategy::scalarCalculation().

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calculatePositionOffsetPhase()

complex_t SSCAHelper::calculatePositionOffsetPhase	(	double	qp,
		double	radial_extension
	)		const

Definition at line 51 of file SSCAHelper.cpp.

{
    return exp_I(m_kappa * qp * (radial_extension - m_mean_radius));
}

References exp_I(), m_kappa, and m_mean_radius.

Referenced by getCharacteristicSizeCoupling(), getMeanFormfactorNorm(), and getMeanFormfactors().

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getMeanFormfactorNorm()

complex_t SSCAHelper::getMeanFormfactorNorm	(	double	qp,
		const std::vector< complex_t > &	precomputed_ff,
		const std::vector< FormFactorCoherentSum > &	ff_wrappers
	)		const

Definition at line 57 of file SSCAHelper.cpp.

{
    complex_t ff_orig = 0., ff_conj = 0.; // original and conjugated mean formfactor
    for (size_t i = 0; i < ff_wrappers.size(); ++i) {
        double radial_extension = ff_wrappers[i].radialExtension();
        complex_t prefac =
            ff_wrappers[i].relativeAbundance() * calculatePositionOffsetPhase(qp, radial_extension);
        ff_orig += prefac * precomputed_ff[i];
        ff_conj += prefac * std::conj(precomputed_ff[i]);
    }
    return ff_orig * ff_conj;
}

References calculatePositionOffsetPhase().

Referenced by SSCApproximationStrategy::scalarCalculation().

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getMeanFormfactors()

void SSCAHelper::getMeanFormfactors	(	double	qp,
		Eigen::Matrix2cd &	ff_orig,
		Eigen::Matrix2cd &	ff_conj,
		const InterferenceFunctionUtils::matrixFFVector_t &	precomputed_ff,
		const std::vector< FormFactorCoherentSum > &	ff_wrappers
	)		const

Definition at line 71 of file SSCAHelper.cpp.

{
    ff_orig = Eigen::Matrix2cd::Zero();
    ff_conj = Eigen::Matrix2cd::Zero();
    for (size_t i = 0; i < ff_wrappers.size(); ++i) {
        double radial_extension = ff_wrappers[i].radialExtension();
        complex_t prefac =
            ff_wrappers[i].relativeAbundance() * calculatePositionOffsetPhase(qp, radial_extension);
        ff_orig += prefac * precomputed_ff[i];
        ff_conj += prefac * precomputed_ff[i].adjoint();
    }
}

References calculatePositionOffsetPhase().

Referenced by SSCApproximationStrategy::polarizedCalculation().

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Member Data Documentation

m_kappa

double SSCAHelper::m_kappa

private

Definition at line 48 of file SSCAHelper.h.

Referenced by calculatePositionOffsetPhase().

m_mean_radius

double SSCAHelper::m_mean_radius

private

Definition at line 49 of file SSCAHelper.h.

Referenced by calculatePositionOffsetPhase(), and init().

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

• /home/www/ba/Sample/Interference/SSCAHelper.h
• /home/www/ba/Sample/Interference/SSCAHelper.cpp