hep.lcd.recon.tracking.fitters.klm
Class AbsKLMTrackFitter

java.lang.Object
  |
  +--hep.lcd.recon.tracking.fitters.klm.AbsKLMTrackFitter

Direct Known Subclasses:

KLMFitTrack

public abstract class AbsKLMTrackFitter

extends Object

Low level interface to the MCFast KLM track fitter. This class should really be wrapped in some more code to make the interface a little easier to use (more "Object Oriented").

Source Code:

AbsKLMTrackFitter.java

Field Summary

static int	DEV_DRIFTBARREL
static int	DEV_DRIFTPLANE
static int	DEV_EMCAL
static int	DEV_HADCAL
static int	DEV_MUON
static int	DEV_PIXELBARREL
static int	DEV_PIXELPLANE
static int	DEV_SILBARREL
static int	DEV_SILDISK
static int	TRACE_ABSORB
static int	TRACE_CALOR
static int	TRACE_CONE
static int	TRACE_DECAY
static int	TRACE_DUMMY
static int	TRACE_PAIR
static int	TRACE_PROD
static int	TRACE_RPLANE
static int	TRACE_SCAT
static int	TRACE_SHOWER
static int	TRACE_ZPLANE

Constructor Summary

AbsKLMTrackFitter()

Method Summary

static void	addNode(int type, double[] x, double[] normal, int sort_key, double radl, double dedx, boolean hit_ok, int dev_type, double[] pos, double[] dircos, double meas_exact, double meas, double sig) Add a node to the track fit
static KLMTrackFit	fitTrack(double mass, double field, KLMTrackParam c_seed) Do the fit
static void	newTrackFit(int eventNumber, int TrackNumber, double[] v) Initialize for a new track fit

Methods inherited from class java.lang.Object

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

Field Detail

TRACE_RPLANE

public static final int TRACE_RPLANE

TRACE_ZPLANE

public static final int TRACE_ZPLANE

TRACE_CONE

public static final int TRACE_CONE

TRACE_PROD

public static final int TRACE_PROD

TRACE_DECAY

public static final int TRACE_DECAY

TRACE_PAIR

public static final int TRACE_PAIR

TRACE_ABSORB

public static final int TRACE_ABSORB

TRACE_CALOR

public static final int TRACE_CALOR

TRACE_SHOWER

public static final int TRACE_SHOWER

TRACE_DUMMY

public static final int TRACE_DUMMY

TRACE_SCAT

public static final int TRACE_SCAT

DEV_SILBARREL

public static final int DEV_SILBARREL

DEV_SILDISK

public static final int DEV_SILDISK

DEV_DRIFTBARREL

public static final int DEV_DRIFTBARREL

DEV_DRIFTPLANE

public static final int DEV_DRIFTPLANE

DEV_PIXELBARREL

public static final int DEV_PIXELBARREL

DEV_PIXELPLANE

public static final int DEV_PIXELPLANE

DEV_EMCAL

public static final int DEV_EMCAL

DEV_HADCAL

public static final int DEV_HADCAL

DEV_MUON

public static final int DEV_MUON

Constructor Detail

AbsKLMTrackFitter

public AbsKLMTrackFitter()

Method Detail

newTrackFit

public static void newTrackFit(int eventNumber,
                               int TrackNumber,
                               double[] v)

Initialize for a new track fit

Parameters:

eventNumber - Used for diagnostic purposes

trackNumber - Used for diagnostic purposes

v - x,y,z of report point

addNode

public static void addNode(int type,
                           double[] x,
                           double[] normal,
                           int sort_key,
                           double radl,
                           double dedx,
                           boolean hit_ok,
                           int dev_type,
                           double[] pos,
                           double[] dircos,
                           double meas_exact,
                           double meas,
                           double sig)

Add a node to the track fit

Parameters:

type - A trace type

x - The point at which the track intersects the measurement device.

normal - The normal to the detector surface/scattering surface at the point x.

sort_key - A key with which to sort the trace points. The point at which the track started and other points get progressively larger along the outward trajectory.

radl - The thickness of the scattering material in units of radiation length

dedx - The amount of energy lost in the scattering material by a minimum ionizing particle at normal incidence. ( GeV )

hit_ok - Is there a hit to add or not?

dev_type - Device type

pos - For most detectors this is the origin of the local coordinate system. For drift chambers it is a point on the wire.

dircos - The direction cosines of the measurement.

meas_exact - The "true" value of the measured quantity.

meas - The smeared value of the measured quantity

sig - The resolution to be used in the fit

fitTrack

public static KLMTrackFit fitTrack(double mass,
                                   double field,
                                   KLMTrackParam c_seed)
                            throws KLMFitError

Do the fit

Parameters:

mass - The mass to use for the particle

field - The B field (in Tesla)

c_seed - The initial track parameters