NXaperture¶
Status:
base class, extends NXobject
Description:
A beamline aperture
Symbols:
No symbol table
- Groups cited:
Structure:
@default: (optional) NX_CHAR
Declares which child group contains a path leading to a NXdata group.
It is recommended (as of NIAC2014) to use this attribute to help define the path to the default dataset to be plotted. See https://www.nexusformat.org/2014_How_to_find_default_data.html for a summary of the discussion.
material: (optional) NX_CHAR
Absorbing material of the aperture.
description: (optional) NX_CHAR
Description of the aperture.
shape: (optional) NX_CHAR
Shape of the aperture.
Any of these values:
straight slit
curved slit
pinhole
circle
square
hexagon
octagon
bladed
open
gridsize: (optional) NX_NUMBER {units=NX_LENGTH}
The relevant dimension for the aperture, i.e. slit width, pinhole and iris diameter
depends_on: (optional) NX_CHAR
Specifies the position of the aperture 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.
POSITIONER: (optional) NXpositioner
Stores the raw positions of aperture motors.
GEOMETRY: (optional) NXgeometry
Location and shape of the aperture.
BLADE_GEOMETRY: (optional) NXgeometry
Location and shape of each blade.
NOTE: (optional) NXnote
Describes any additional information.
Hypertext Anchors¶
List of hypertext anchors for all groups, fields, attributes, and links defined in this class.
