3.3.1.2. NXattenuator¶
Status:
base class, extends NXobject
Description:
A device that reduces the intensity of a beam by attenuation.
If uncertain whether to use NXfilter (band-pass filter) or NXattenuator (reduces beam intensity), then choose NXattenuator.
Symbols:
No symbol table
- Groups cited:
none
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.
distance: (optional) NX_FLOAT {units=NX_LENGTH}
Distance from sample
type: (optional) NX_CHAR
Type or composition of attenuator, e.g. polythene
thickness: (optional) NX_FLOAT {units=NX_LENGTH}
Thickness of attenuator along beam direction
scattering_cross_section: (optional) NX_FLOAT {units=NX_CROSS_SECTION}
Scattering cross section (coherent+incoherent)
absorption_cross_section: (optional) NX_FLOAT {units=NX_CROSS_SECTION}
Absorption cross section
attenuator_transmission: (optional) NX_FLOAT {units=NX_DIMENSIONLESS}
The nominal amount of the beam that gets through (transmitted intensity)/(incident intensity)
status: (optional) NX_CHAR
In or out or moving of the beam
Any of these values:
in|out|moving@time: (optional) NX_DATE_TIME
time stamp for this observation
Hypertext Anchors¶
Table of hypertext anchors for all groups, fields, attributes, and links defined in this class.
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