base class, extends NXobject


A neutron moderator


No symbol table

Groups cited:

NXdata, NXgeometry, NXlog


@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}

Effective distance as seen by measuring radiation

type: (optional) NX_CHAR

Any of these values:

  • H20

  • D20

  • Liquid H2

  • Liquid CH4

  • Liquid D2

  • Solid D2

  • C

  • Solid CH4

  • Solid H2

poison_depth: (optional) NX_FLOAT {units=NX_LENGTH}

coupled: (optional) NX_BOOLEAN

whether the moderator is coupled

coupling_material: (optional) NX_CHAR

The material used for coupling. Usually Cd.

poison_material: (optional) NX_CHAR

Any of these values: Gd | Cd

temperature: (optional) NX_FLOAT {units=NX_TEMPERATURE}

average/nominal moderator temperature

GEOMETRY: (optional) NXgeometry

“Engineering” position of moderator

temperature_log: (optional) NXlog

log file of moderator temperature

pulse_shape: (optional) NXdata

moderator pulse shape

Hypertext Anchors

Table of hypertext anchors for all groups, fields, attributes, and links defined in this class.

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