#include <acts/blob/sPHENIX/Core/include/Acts/Material/Material.hpp>

Public Types
using	ParametersVector = Eigen::Matrix< float, 5, 1 >

Public Member Functions
	Material ()=default
	Construct a vacuum representation.

	Material (const ParametersVector &parameters)
	Construct from an encoded parameters vector.

	Material (Material &&mat)=default

	Material (const Material &mat)=default

	~Material ()=default

Material &	operator= (Material &&mat)=default

Material &	operator= (const Material &mat)=default

constexpr	operator bool () const
	Check if the material is valid, i.e. it is not vacuum.

constexpr float	X0 () const
	Return the radition length. Infinity in case of vacuum.

constexpr float	L0 () const
	Return the nuclear interaction length. Infinity in case of vacuum.

constexpr float	Ar () const
	Return the relative atomic mass.

constexpr float	Z () const
	Return the nuclear charge number.

constexpr float	molarDensity () const
	Return the molar density.

constexpr float	molarElectronDensity () const
	Return the molar electron density.

float	massDensity () const
	Return the mass density.

float	meanExcitationEnergy () const
	Return the mean electron excitation energy.

ParametersVector	parameters () const
	Encode the properties into an opaque parameters vector.

Static Public Member Functions
static Material	fromMolarDensity (float x0, float l0, float ar, float z, float molarRho)

static Material	fromMassDensity (float x0, float l0, float ar, float z, float massRho)

Private Attributes
float	m_x0 = std::numeric_limits<float>::infinity()

float	m_l0 = std::numeric_limits<float>::infinity()

float	m_ar = 0.0f

float	m_z = 0.0f

float	m_molarRho = 0.0f

Friends
constexpr bool	operator== (const Material &lhs, const Material &rhs)

constexpr bool	operator!= (const Material &lhs, const Material &rhs)

Detailed Description

Material description for interactions with matter.

The following parameters are used to specify the material and its interactions with traversing particles:

radiation length X0 (native length units)
nuclear interaction length L0 (native length units)
relative atomic mass Ar (unitless number)
nuclear charge number Z (elementary charge e)
molar density (native amount-of-substance unit / (native length unit)³)

The parameters can be effective or average parameters e.g. when a mixture of materials is described.

Note: Always use the opaque parameters vector to serialize/deserialize the material information. Since the internal storage might be different from the external accessors, this ensures that always the numerically optimal parameters are stored. Use the ParametersVector type and do not assume any particular size since we might consider to store more parameters in the future.

Definition at line 39 of file Material.hpp.

View newest version in sPHENIX GitHub at line 39 of file Material.hpp

Member Typedef Documentation

using Acts::Material::ParametersVector = Eigen::Matrix<float, 5, 1>

Definition at line 41 of file Material.hpp.

View newest version in sPHENIX GitHub at line 41 of file Material.hpp

Constructor & Destructor Documentation

Acts::Material::Material ( )

default

Construct a vacuum representation.

Acts::Material::Material ( const ParametersVector & parameters )

Construct from an encoded parameters vector.

Definition at line 65 of file Material.cpp.

View newest version in sPHENIX GitHub at line 65 of file Material.cpp

Acts::Material::Material ( Material && mat )

default

Acts::Material::Material ( const Material & mat )

default

Acts::Material::~Material ( )

default

Member Function Documentation

constexpr float Acts::Material::Ar ( ) const

inline

Return the relative atomic mass.

Definition at line 92 of file Material.hpp.

View newest version in sPHENIX GitHub at line 92 of file Material.hpp

References m_ar.

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), BOOST_AUTO_TEST_CASE(), and Acts::operator<<().

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Acts::Material Acts::Material::fromMassDensity	(	float	x0,
		float	l0,
		float	ar,
		float	z,
		float	massRho
	)

static

Construct from material parameters using the mass density.

Parameters

x0	is the radiation length
l0	is the nuclear interaction length
ar	is the relative atomic mass
z	is the nuclear charge number
massRho	is the mass density

Warning: Due to the choice of native mass units, using the mass density can lead to numerical problems. Typical mass densities lead to computations with values differing by 20+ orders of magnitude.

Definition at line 29 of file Material.cpp.

View newest version in sPHENIX GitHub at line 29 of file Material.cpp

References m_x0, x0, and physmon_track_finding_ttbar::z.

Referenced by BOOST_AUTO_TEST_CASE(), ActsExamples::Generic::buildDetector(), main(), Acts::Geant4MaterialConverter::material(), Acts::TGeoMaterialConverter::materialSlab(), ActsExamples::RootMaterialTrackReader::read(), ActsExamples::MaterialSteppingAction::UserSteppingAction(), and while().

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Acts::Material Acts::Material::fromMolarDensity	(	float	x0,
		float	l0,
		float	ar,
		float	z,
		float	molarRho
	)

static

Construct from material parameters using the molar density.

Parameters

x0	is the radiation length
l0	is the nuclear interaction length
ar	is the relative atomic mass
z	is the nuclear charge number
molarRho	is the molar density

Definition at line 54 of file Material.cpp.

View newest version in sPHENIX GitHub at line 54 of file Material.cpp

References m_ar, m_l0, m_molarRho, m_x0, m_z, x0, and physmon_track_finding_ttbar::z.

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), BOOST_AUTO_TEST_CASE(), BOOST_DATA_TEST_CASE(), Acts::Test::makeBeryllium(), Acts::Test::makeSilicon(), and Acts::Test::makeUnitSlab().

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constexpr float Acts::Material::L0 ( ) const

inline

Return the nuclear interaction length. Infinity in case of vacuum.

Definition at line 90 of file Material.hpp.

View newest version in sPHENIX GitHub at line 90 of file Material.hpp

References m_l0.

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), BOOST_AUTO_TEST_CASE(), and Acts::operator<<().

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float Acts::Material::massDensity ( ) const

Return the mass density.

Definition at line 72 of file Material.cpp.

View newest version in sPHENIX GitHub at line 72 of file Material.cpp

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), and BOOST_AUTO_TEST_CASE().

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float Acts::Material::meanExcitationEnergy ( ) const

Return the mean electron excitation energy.

Definition at line 81 of file Material.cpp.

View newest version in sPHENIX GitHub at line 81 of file Material.cpp

References f.

Referenced by BOOST_AUTO_TEST_CASE().

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constexpr float Acts::Material::molarDensity ( ) const

inline

Return the molar density.

Definition at line 96 of file Material.hpp.

View newest version in sPHENIX GitHub at line 96 of file Material.hpp

References m_molarRho.

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), BOOST_AUTO_TEST_CASE(), and Acts::operator<<().

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constexpr float Acts::Material::molarElectronDensity ( ) const

inline

Return the molar electron density.

Definition at line 98 of file Material.hpp.

View newest version in sPHENIX GitHub at line 98 of file Material.hpp

References m_molarRho, and m_z.

Referenced by BOOST_AUTO_TEST_CASE().

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constexpr Acts::Material::operator bool ( ) const

inline

Check if the material is valid, i.e. it is not vacuum.

Definition at line 85 of file Material.hpp.

View newest version in sPHENIX GitHub at line 85 of file Material.hpp

References m_ar.

Material& Acts::Material::operator= ( Material && mat )

default

Material& Acts::Material::operator= ( const Material & mat )

default

Acts::Material::ParametersVector Acts::Material::parameters ( ) const

Encode the properties into an opaque parameters vector.

Definition at line 88 of file Material.cpp.

View newest version in sPHENIX GitHub at line 88 of file Material.cpp

References Dataset::parameters.

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), Acts::to_json(), and while().

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constexpr float Acts::Material::X0 ( ) const

inline

Return the radition length. Infinity in case of vacuum.

Definition at line 88 of file Material.hpp.

View newest version in sPHENIX GitHub at line 88 of file Material.hpp

References m_x0.

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), BOOST_AUTO_TEST_CASE(), Acts::operator<<(), and Acts::AccumulatedMaterialSlab::trackVariance().

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constexpr float Acts::Material::Z ( ) const

inline

Return the nuclear charge number.

Definition at line 94 of file Material.hpp.

View newest version in sPHENIX GitHub at line 94 of file Material.hpp

References m_z.

Referenced by Acts::Test::BOOST_AUTO_TEST_CASE(), BOOST_AUTO_TEST_CASE(), ActsFatras::detail::GaussianMixture::operator()(), ActsFatras::detail::GeneralMixture::operator()(), and Acts::operator<<().

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Friends And Related Function Documentation

constexpr bool operator!=	(	const Material &	lhs,
		const Material &	rhs
	)

friend

Definition at line 119 of file Material.hpp.

View newest version in sPHENIX GitHub at line 119 of file Material.hpp

constexpr bool operator==	(	const Material &	lhs,
		const Material &	rhs
	)

friend

Definition at line 114 of file Material.hpp.

View newest version in sPHENIX GitHub at line 114 of file Material.hpp

Member Data Documentation

float Acts::Material::m_ar = 0.0f

private

Definition at line 110 of file Material.hpp.

View newest version in sPHENIX GitHub at line 110 of file Material.hpp

Referenced by Ar(), fromMolarDensity(), and operator bool().

float Acts::Material::m_l0 = std::numeric_limits<float>::infinity()

private

Definition at line 109 of file Material.hpp.

View newest version in sPHENIX GitHub at line 109 of file Material.hpp

Referenced by fromMolarDensity(), and L0().

float Acts::Material::m_molarRho = 0.0f

private

Definition at line 112 of file Material.hpp.

View newest version in sPHENIX GitHub at line 112 of file Material.hpp

Referenced by fromMolarDensity(), molarDensity(), and molarElectronDensity().

float Acts::Material::m_x0 = std::numeric_limits<float>::infinity()

private

Definition at line 108 of file Material.hpp.

View newest version in sPHENIX GitHub at line 108 of file Material.hpp

Referenced by fromMassDensity(), fromMolarDensity(), and X0().

float Acts::Material::m_z = 0.0f

private

Definition at line 111 of file Material.hpp.

View newest version in sPHENIX GitHub at line 111 of file Material.hpp

Referenced by fromMolarDensity(), molarElectronDensity(), and Z().

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

acts/blob/sPHENIX/Core/include/Acts/Material/Material.hpp
acts/blob/sPHENIX/Core/src/Material/Material.cpp

Public Types

Public Member Functions

Static Public Member Functions

Private Attributes

Friends

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation