Acts::MaterialSlab Class Reference

Material description for an object with defined thickness. More...

#include <Acts/Material/MaterialSlab.hpp>

Public Member Functions
constexpr	MaterialSlab ()
	Default constructor.
	MaterialSlab (const Material &material, float thickness)
	Construct from material description.
bool	isVacuum () const
	Check if the material is vacuum.
constexpr const Material &	material () const
	Access the (average) material parameters.
void	scaleThickness (float scale)
	Scale the material thickness by the given factor.
constexpr float	thickness () const
	Return the thickness.
constexpr float	thicknessInL0 () const
	Return the nuclear interaction length fraction.
constexpr float	thicknessInX0 () const
	Return the radiation length fraction.

Static Public Member Functions
static MaterialSlab	combine (const MaterialSlab &slab1, const Material &material2, float thickness2)
	Compute the average properties for a combined slab of two materials.
static MaterialSlab	combineLayers (const MaterialSlab &layerA, const MaterialSlab &layerB)
	Combine material properties of two layers by averaging them.
static MaterialSlab	combineLayers (const std::vector< MaterialSlab > &layers)
	Combine material properties of multiple layers by averaging them.
static constexpr MaterialSlab	Nothing ()
	Create a material slab with no material content.
static constexpr MaterialSlab	Vacuum (float thickness)
	Create a vacuum material slab with specified thickness.

Detailed Description

Material description for an object with defined thickness.

This is intended to describe concrete surface materials.

See also

Material for a description of the available parameters.

Constructor & Destructor Documentation

MaterialSlab() [1/2]

Acts::MaterialSlab::MaterialSlab ( )

constexpr

Default constructor.

TODO consider removing. currently needed for default construction in grids

MaterialSlab() [2/2]

Acts::MaterialSlab::MaterialSlab	(	const Material &	material,
		float	thickness )

Construct from material description.

Parameters

material	is the material description
thickness	is the thickness of the material

Member Function Documentation

combine()

MaterialSlab Acts::MaterialSlab::combine ( const MaterialSlab & slab1, const Material & material2, float thickness2 )

static

Compute the average properties for a combined slab of two materials.

The averaged material slab has the combined thickness of the two input slabs and assumes the two input materials are homogeneously and continuously mixed throughout the slab.

Parameters

slab1	Properties of the first material slab
material2	Properties of the second material
thickness2	Thickness of the second material slab. Can be negative to subtract the second material from the first slab.

Returns

Material slab with the combined thickness and average parameters

combineLayers() [1/2]

MaterialSlab Acts::MaterialSlab::combineLayers ( const MaterialSlab & layerA, const MaterialSlab & layerB )

static

Combine material properties of two layers by averaging them.

Parameters

layerA	Input layer A to average over.
layerB	Input layer B to average over.

Returns

The resulting object has the combined thickness of all layers but just one set of appropriately averaged material constants.

combineLayers() [2/2]

MaterialSlab Acts::MaterialSlab::combineLayers ( const std::vector< MaterialSlab > & layers )

static

Combine material properties of multiple layers by averaging them.

Parameters

layers

Input layers to average over.

Returns

The resulting object has the combined thickness of all layers but just one set of appropriately averaged material constants.

isVacuum()

bool Acts::MaterialSlab::isVacuum

(

)

const

Check if the material is vacuum.

Returns

True if the material is vacuum or thickness is zero/negative

material()

const Material & Acts::MaterialSlab::material ( ) const

constexpr

Access the (average) material parameters.

Returns

Reference to the material properties

Nothing()

constexpr MaterialSlab Acts::MaterialSlab::Nothing ( )

staticconstexpr

Create a material slab with no material content.

Returns

Empty material slab with zero thickness and no material

scaleThickness()

void Acts::MaterialSlab::scaleThickness

(

float

scale

)

Scale the material thickness by the given factor.

Parameters

scale

Factor by which to scale the thickness

thickness()

float Acts::MaterialSlab::thickness ( ) const

constexpr

Return the thickness.

Returns

Material thickness in millimeters

thicknessInL0()

float Acts::MaterialSlab::thicknessInL0 ( ) const

constexpr

Return the nuclear interaction length fraction.

Returns

Thickness as a fraction of nuclear interaction length

thicknessInX0()

float Acts::MaterialSlab::thicknessInX0 ( ) const

constexpr

Return the radiation length fraction.

Returns

Thickness as a fraction of radiation length

Vacuum()

constexpr MaterialSlab Acts::MaterialSlab::Vacuum ( float thickness )

staticconstexpr

Create a vacuum material slab with specified thickness.

Parameters

thickness

The thickness of the vacuum region

Returns

Vacuum material slab with the given thickness