org.lcsim.recon.tracking.trfcyl

Class ThinCylMs

java.lang.Object

org.lcsim.recon.tracking.trfbase.Interactor

org.lcsim.recon.tracking.trfcyl.ThinCylMs

public class ThinCylMs
extends Interactor

This class modifies the covariance matrix of a track corresponding to multiple scattering in a thin cylindrical shell whose material is represented by the number of radiation lengths.

Version:

1.0

Author:

Norman A. Graf

Field Summary

Fields

Modifier and Type	Field and Description
private double	_radLength

Constructor Summary

Constructors

Constructor and Description
ThinCylMs(double radLength) Construct an instance from the number of radiation lengths of the cylindrical shell material.

Method Summary

Methods

Modifier and Type	Method and Description
void	interact_dir(ETrack theTrack, PropDir direction)
void	interact(ETrack tre) Interact the given track in this cylindrical shell, using the thin material approximation for multiple scattering.
Interactor	newCopy() Make a clone of this object.
double	radLength() Return the number of radiation lengths.
String	toString() output stream

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

_radLength

private double _radLength

Constructor Detail

ThinCylMs

public ThinCylMs(double radLength)

Construct an instance from the number of radiation lengths of the cylindrical shell material. The Interactor is constructed with the appropriate number of radiation lengths.

Parameters:

radLength - The thickness of the material in radiation lengths.

Method Detail

interact

public void interact(ETrack tre)

Interact the given track in this cylindrical shell, using the thin material approximation for multiple scattering. Note that the track parameters are not modified. Only the covariance matrix is updated to reflect the uncertainty caused by traversing the thin cylindrical shell of material.

Specified by:

interact in class Interactor

Parameters:

tre - The ETrack to scatter.

interact_dir

public void interact_dir(ETrack theTrack,
                PropDir direction)

radLength

public double radLength()

Return the number of radiation lengths.

Returns:

The thickness of the scattering material in radiation lengths.

newCopy

public Interactor newCopy()

Make a clone of this object.

Specified by:

newCopy in class Interactor

Returns:

A Clone of this instance.

toString

public String toString()

output stream

Overrides:

toString in class Object

Returns:

A String representation of this instance.