org.lcsim.recon.tracking.trfeloss

Class DeDxBethe

java.lang.Object

org.lcsim.recon.tracking.trfeloss.DeDx

org.lcsim.recon.tracking.trfeloss.DeDxBethe

public class DeDxBethe
extends DeDx

Class for evaluating the energy loss according to the Bethe-Bloch equation.

Version:

1.0

Author:

Norman A. Graf

Field Summary

Fields

Modifier and Type	Field and Description
private double	_a
private double	_C
private double	_cA
private double	_density
private double	_ionizationPot
private double	_m
private double	_particleMass
private double	_X0
private double	_X1

Constructor Summary

Constructors

Constructor and Description
DeDxBethe(double density) Construct an instance given a material density.

Method Summary

Methods

Modifier and Type	Method and Description
double	dEdX(double energy) Return energy loss (dE/dx) for a given energy.
double	loseEnergy(double energy, double x) Return new energy for a given path distance.
double	sigmaEnergy(double energy, double x) Return the uncertainty in the energy lost sigma(E).
String	toString() output stream

Methods inherited from class java.lang.Object

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

Field Detail

_density

private double _density

_particleMass

private double _particleMass

_a

private double _a

_ionizationPot

private double _ionizationPot

_cA

private double _cA

_X0

private double _X0

_X1

private double _X1

_m

private double _m

_C

private double _C

Constructor Detail

DeDxBethe

public DeDxBethe(double density)

Construct an instance given a material density.

Parameters:

density - The density of the material.

Method Detail

dEdX

public double dEdX(double energy)

Return energy loss (dE/dx) for a given energy.

Specified by:

dEdX in class DeDx

Parameters:

energy - The energy of the particle.

Returns:

The average energy lost by a particle of this energy.

sigmaEnergy

public double sigmaEnergy(double energy,
                 double x)

Return the uncertainty in the energy lost sigma(E).

Specified by:

sigmaEnergy in class DeDx

Parameters:

energy - The energy of the particle.

x - The amount of material.

Returns:

The uncertainty in the energy lost sigma(E).

loseEnergy

public double loseEnergy(double energy,
                double x)

Return new energy for a given path distance. Energy increases if x < 0.

Specified by:

loseEnergy in class DeDx

Parameters:

energy - The energy of the particle.

x - The amount of material.

Returns:

New energy for a given path distance.

toString

public String toString()

output stream

Overrides:

toString in class Object

Returns:

A String representation of this instance.