PaMaterialMaps Class Reference

Material Maps. More...

#include <PaMaterialMaps.h>

List of all members.

Public Member Functions
void	getRadLength (const PaTPar &hel, bool direc, float &RadLen, float &StepZ, bool limit_step=true) const
	Returns the radiative length RadLen in the point defined by hel. Also returns the step size along Z axis from hel to next medium.
float	getdE (const PaTPar &hel, double Len) const
	Returns the coefficient ( [dE] = GeV ) for most probable energy loss at the point defined by hel for a step of length len (in cm).
float	getdEStraggling (const PaTPar &hel, float Len) const
	Returns the sigma of energy loss distribution ( [dE] = GeV ) for momentum losses during a step of length Len at the point defined by hel in target.
bool	usingROOTGeometry () const
	Return true if the ROOTGeometry is in use, false otherwise.
const TMacro &	getROOTGeometry () const
	Returns a reference to the macro containing the currently loaded ROOT Geometry.
double	getMassDefault () const
	Returns the default mass used for energy loss calculations in the case if ROOTGeimetry is used.
bool	InMaterialMap (PaTPar &hel) const
	Returns true if "hel" is inside material map.
PaMaterialMaps &	operator= (const PaMaterialMaps &c)
	"=" operator

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Detailed Description

Material Maps.

The class PaMaterialMaps (teken from CsMatrialMap) contains the table of radiative lengths and the table of dE/dX. The volume is split into boxes and an average radiative lengths or dE/dX is assigned to every box. The basic idea of introducing material maps is to provide a track extrapolation code with a way to take into account effects of multiple scattering and energy losses. (by Alexandre Korzenev, Jan P. Nassalski)

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Member Function Documentation

float PaMaterialMaps::getdE	(	const PaTPar &	hel,
		double	Len
	)			const

Returns the coefficient ( [dE] = GeV ) for most probable energy loss at the point defined by hel for a step of length len (in cm).

Parameters:

	hel	The position in space (must be filled according to TRAFFIC).
	Len	The length of the step to take.

References PaTPar::DirCos().

Referenced by PaTPar::Extrapolate().

float PaMaterialMaps::getdEStraggling	(	const PaTPar &	hel,
		float	Len
	)			const

Returns the sigma of energy loss distribution ( [dE] = GeV ) for momentum losses during a step of length Len at the point defined by hel in target.

Parameters:

	hel	The position in space (must be filled according to TRAFFIC).
	Len	length of the step.

References PaTPar::DirCos().

Referenced by PaTPar::Extrapolate().

void PaMaterialMaps::getRadLength	(	const PaTPar &	hel,
		bool	direc,
		float &	RadLen,
		float &	StepZ,
		bool	limit_step = true
	)			const

Returns the radiative length RadLen in the point defined by hel. Also returns the step size along Z axis from hel to next medium.

Parameters:

	hel	The position in space (must be filled according to TRAFFIC).
	direc	Direction along beam axis. direc = true : extrapolation is performed along beam. direc = false : extrapolation is performed in opposite to beam derection.
	RadLen	The radiative length in hel (in cm).
	StepZ	The step size along beam axis from hel to next medium (in cm).
	limit_step	if true, set a limit to recommended step Track extrapolated as straight line. If extrapolation is in backward direction than StepZ < 0.

References PaTPar::DirCos().

Referenced by PaTPar::Extrapolate().

bool PaMaterialMaps::InMaterialMap

(

PaTPar &

hel

)

const

Returns true if "hel" is inside material map.

Warning:

As material map (if defined) are assumed to include also all detectors' materials in sufficiently wide XY ranges, only Z coordinate is checked.

Referenced by PaTrack::FullKF().

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

• lib/PaMaterialMaps.h
• lib/PaMaterialMaps.cc