4.3.3.6. NXcollectioncolumn¶
Status:
base class, extends NXobject
Description:
Subclass of NXelectronanalyser to describe the electron collection column of a photoelectron analyser.
Symbols:
No symbol table
- Groups cited:
Structure:
scheme: (optional) NX_CHAR
Scheme of the electron collection lens, i.e. standard, deflector, PEEM, momentum microscope, etc.
extractor_voltage: (optional) NX_FLOAT {units=NX_VOLTAGE}
Voltage applied to the extractor lens
extractor_current: (optional) NX_FLOAT {units=NX_CURRENT}
Current necessary to keep the extractor lens at a set voltage. Variations indicate leakage, field emission or arc currents to the extractor lens.
working_distance: (optional) NX_FLOAT {units=NX_LENGTH}
Distance between sample and detector entrance
mode: (optional) NX_CHAR
Labelling of the lens setting in use.
projection: (optional) NX_CHAR
The space projected in the angularly dispersive directions, real or reciprocal
Any of these values:
real|reciprocalmagnification: (optional) NX_FLOAT {units=NX_DIMENSIONLESS}
The magnification of the electron lens assembly.
depends_on: (optional) NX_CHAR
Specifies the position of the collectioncolumn by pointing to the last transformation in the transformation chain in the NXtransformations group.
TRANSFORMATIONS: (optional) NXtransformations
Collection of axis-based translations and rotations to describe the location and geometry of the deflector as a component in the instrument. Conventions from the NXtransformations base class are used. In principle, the McStas coordinate system is used. The first transformation has to point either to another component of the system or . (for pointing to the reference frame) to relate it relative to the experimental setup. Typically, the components of a system should all be related relative to each other and only one component should relate to the reference coordinate system.
APERTURE: (optional) NXaperture
The size and position of an aperture inserted in the column, e.g. field aperture or contrast aperture
DEFLECTOR: (optional) NXdeflector
Deflectors in the collection column section
LENS_EM: (optional) NXlens_em
Individual lenses in the collection column section
Hypertext Anchors¶
List of hypertext anchors for all groups, fields, attributes, and links defined in this class.