Class MPGDTrapezoidGeant4Factory

java.lang.Object

org.jlab.detector.geant4.v2.Geant4Factory

org.jlab.detector.geant4.v2.MPGD.trapezoid.MPGDTrapezoidGeant4Factory

Direct Known Subclasses:

MUVTGeant4Factory, URWTGeant4Factory

public class MPGDTrapezoidGeant4Factory
extends Geant4Factory

Generic Geant4 factory for trapezoidal MPGD-like trackers. It builds: - a world volume - NREGIONS = NLAYERS/2 (by convention) - NSECTORS per region The exact geometry parameters and material stack are taken from an MPGDTrapezoidConstants instance. Concrete detectors should: - extend this class - pass the appropriate constants + detector name in the constructor

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	MPGDTrapezoidGeant4Factory.SectorDimensions

Field Summary

Fields

Modifier and Type	Field	Description
protected final MPGDTrapezoidConstants	C	Detector constants (geometry + materials from CCDB).

Fields inherited from class Geant4Factory

motherVolume, properties

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MPGDTrapezoidGeant4Factory(MPGDTrapezoidConstants constants)

Method Summary

Modifier and Type	Method	Description
Geant4Basic	createSector(int isector, int iregion)	Builds a single sector for a given region and returns its volume.
protected Geant4Basic	createSectorVolume(int isector, int iregion, MPGDTrapezoidGeant4Factory.SectorDimensions dimSect)	Creates the main trapezoidal sector volume and places it in the world.
Vector3d	getCenterCoordinate(int isector, int iregion)	Computes the barycenter coordinates of a given sector/region in the CLAS12 coordinate system.
MPGDTrapezoidGeant4Factory.SectorDimensions	getSectorActiveVolumeDimensions(int region)
MPGDTrapezoidGeant4Factory.SectorDimensions	getSectorContainerDimensions(int region)
double	getSectorHeight(int region)	Computes the sector height (longitudinal extension in the RZ plane) for a given region.
double	getSectorThickness()	Computes the total thickness (mm) of a sector by summing the thickness of all material volumes.
protected final void	init()	Initializes the world volume and constructs all regions and sectors.
protected void	populateSectorWithDetectorStructure(Geant4Basic sectorVolume, int isector, int iregion, MPGDTrapezoidGeant4Factory.SectorDimensions dimSect)	Fills the given sector volume with material sub-volumes according to the CCDB material structure (layer/component stack).Stacking is done along the local Z direction (thickness).

Methods inherited from class Geant4Factory

getAllVolumes, getComponents, getIntersections, getProperty, toString

Methods inherited from class Object

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

Field Details

C

protected final MPGDTrapezoidConstants C

Detector constants (geometry + materials from CCDB).

Constructor Details

MPGDTrapezoidGeant4Factory

protected MPGDTrapezoidGeant4Factory(MPGDTrapezoidConstants constants)

Parameters:

constants - detector constants (already configured with CCDB paths/table names)

Method Details

init

protected final void init()

Initializes the world volume and constructs all regions and sectors. This must be called after the constants have been loaded from CCDB.

getSectorThickness

public double getSectorThickness()

Computes the total thickness (mm) of a sector by summing the thickness of all material volumes.

Returns:

getSectorActiveVolumeDimensions

public MPGDTrapezoidGeant4Factory.SectorDimensions getSectorActiveVolumeDimensions(int region)

Parameters:

region -

Returns:

getSectorContainerDimensions

public MPGDTrapezoidGeant4Factory.SectorDimensions getSectorContainerDimensions(int region)

Parameters:

region -

Returns:

getSectorHeight

public double getSectorHeight(int region)

Computes the sector height (longitudinal extension in the RZ plane) for a given region.

Parameters:

region -

Returns:

getCenterCoordinate

public Vector3d getCenterCoordinate(int isector,
 int iregion)

Computes the barycenter coordinates of a given sector/region in the CLAS12 coordinate system.

Parameters:

isector -

iregion -

Returns:

createSector

public Geant4Basic createSector(int isector,
 int iregion)

Builds a single sector for a given region and returns its volume.

Parameters:

isector -

iregion -

Returns:

createSectorVolume

protected Geant4Basic createSectorVolume(int isector,
 int iregion,
 MPGDTrapezoidGeant4Factory.SectorDimensions dimSect)

Creates the main trapezoidal sector volume and places it in the world.

Parameters:

isector -

iregion -

dimSect -

Returns:

populateSectorWithDetectorStructure

protected void populateSectorWithDetectorStructure(Geant4Basic sectorVolume,
 int isector,
 int iregion,
 MPGDTrapezoidGeant4Factory.SectorDimensions dimSect)

Fills the given sector volume with material sub-volumes according to the CCDB material structure (layer/component stack).Stacking is done along the local Z direction (thickness).

Parameters:

sectorVolume -

isector -

iregion -

dimSect -