org.lcsim.recon.tracking.trfcylplane

Class PropZXY

java.lang.Object

org.lcsim.recon.tracking.trfbase.Propagator

org.lcsim.recon.tracking.trfbase.PropDirected

org.lcsim.recon.tracking.trfcylplane.PropZXY

public class PropZXY
extends PropDirected

Propagates tracks from a ZPlane to an XYPlane in a constant magnetic field.

Propagation will fail if either the origin is not a ZPlane or destination is not a XYPlane. Propagator works incorrectly for tracks with very small curvatures

Version:

1.0

Author:

Norman A. Graf

Field Summary

Fields

Modifier and Type	Field and Description
private double	_bfac
private PropXYXY	_propxyxy
private static int	IDVDU
private static int	IDXDZ
private static int	IDYDZ
private static int	IDZDU
private static int	IQP_XY
private static int	IQP_Z
private static int	IV
private static int	IX
private static int	IY
private static int	IZ

Constructor Summary

Constructors

Constructor and Description
PropZXY(double bfield) Construct an instance from a constant solenoidal magnetic field in Tesla.

Method Summary

Methods

Modifier and Type	Method and Description
double	bField() Return the strength of the magnetic field in Tesla.
Propagator	newPropagator() Clone an instance.
static String	staticType() Return a String representation of the class' type name.
String	toString() output stream
String	type() Return a String representation of the class' type name.
static String	typeName() Return a String representation of the class' type name.
PropStat	vecDirProp(VTrack trv, Surface srf, PropDir dir) Propagate a track without error in the specified direction.
PropStat	vecDirProp(VTrack trv, Surface srf, PropDir dir, TrackDerivative deriv) Propagate a track without error in the specified direction and return the derivative matrix in deriv.
private PropStat	vecTransformZXY(double B, VTrack trv, double phi_n, PropDir dir, TrackDerivative deriv)

Methods inherited from class org.lcsim.recon.tracking.trfbase.PropDirected

direction, direction, errProp, vecProp

Methods inherited from class org.lcsim.recon.tracking.trfbase.Propagator

errDirProp, errDirProp, errProp, reduce, reduceDirection, vecProp

Methods inherited from class java.lang.Object

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

Field Detail

IV

private static final int IV

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Constant Field Values

IZ

private static final int IZ

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Constant Field Values

IDVDU

private static final int IDVDU

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Constant Field Values

IDZDU

private static final int IDZDU

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Constant Field Values

IQP_XY

private static final int IQP_XY

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Constant Field Values

IX

private static final int IX

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Constant Field Values

IY

private static final int IY

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Constant Field Values

IDXDZ

private static final int IDXDZ

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Constant Field Values

IDYDZ

private static final int IDYDZ

See Also:

Constant Field Values

IQP_Z

private static final int IQP_Z

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Constant Field Values

_bfac

private double _bfac

_propxyxy

private PropXYXY _propxyxy

Constructor Detail

PropZXY

public PropZXY(double bfield)

Construct an instance from a constant solenoidal magnetic field in Tesla.

Parameters:

bfield - The magnetic field strength in Tesla.

Method Detail

typeName

public static String typeName()

Return a String representation of the class' type name. Included for completeness with the C++ version.

Returns:

A String representation of the class' type name.

staticType

public static String staticType()

Return a String representation of the class' type name. Included for completeness with the C++ version.

Returns:

A String representation of the class' type name.

newPropagator

public Propagator newPropagator()

Clone an instance.

Specified by:

newPropagator in class Propagator

Returns:

A Clone of this instance.

vecDirProp

public PropStat vecDirProp(VTrack trv,
                  Surface srf,
                  PropDir dir,
                  TrackDerivative deriv)

Propagate a track without error in the specified direction and return the derivative matrix in deriv. The track parameters for a cylinder are: phi z alpha tan(lambda) curvature

Specified by:

vecDirProp in class Propagator

Parameters:

trv - The VTrack to propagate.

srf - The Surface to which to propagate.

dir - The direction in which to propagate.

deriv - The track derivatives to update at the surface srf.

Returns:

The propagation status.

vecDirProp

public PropStat vecDirProp(VTrack trv,
                  Surface srf,
                  PropDir dir)

Propagate a track without error in the specified direction. The track parameters for a cylinder are: phi z alpha tan(lambda) curvature

Overrides:

vecDirProp in class Propagator

Parameters:

trv - The VTrack to propagate.

srf - The Surface to which to propagate.

dir - The direction in which to propagate.

Returns:

The propagation status.

bField

public double bField()

Return the strength of the magnetic field in Tesla.

Returns:

The strength of the magnetic field in Tesla.

type

public String type()

Return a String representation of the class' type name. Included for completeness with the C++ version.

Returns:

A String representation of the class' type name.

toString

public String toString()

output stream

Overrides:

toString in class Object

Returns:

A String representation of this instance.

vecTransformZXY

private PropStat vecTransformZXY(double B,
                       VTrack trv,
                       double phi_n,
                       PropDir dir,
                       TrackDerivative deriv)