NXmonopd

Status:

application definition, extends NXobject

Description:

Monochromatic Neutron and X-Ray Powder diffractometer

Instrument definition for a powder diffractometer at a monochromatic neutron or X-ray beam. This is both suited for a powder diffractometer with a single detector or a powder diffractometer with a position sensitive detector.

Symbols:

The symbol(s) listed here will be used below to coordinate datasets with the same shape.

i: i is the number of wavelengths

nDet: Number of detectors

Groups cited:

NXcrystal, NXdata, NXdetector, NXentry, NXinstrument, NXmonitor, NXsample, NXsource

Structure:

entry: (required) NXentry

title: (required) NX_CHAR

start_time: (required) NX_DATE_TIME

definition: (required) NX_CHAR

Official NeXus NXDL schema to which this file conforms

Obligatory value: NXmonopd

INSTRUMENT: (required) NXinstrument

SOURCE: (required) NXsource

type: (required) NX_CHAR

name: (required) NX_CHAR

probe: (required) NX_CHAR

Any of these values: neutron | x-ray | electron

CRYSTAL: (required) NXcrystal

wavelength[i]: (required) NX_FLOAT {units=NX_WAVELENGTH}

Optimum diffracted wavelength

DETECTOR: (required) NXdetector

polar_angle[nDet]: (required) NX_FLOAT

data[nDet]: (required) NX_INT

detector signal (usually counts) are already corrected for detector efficiency

SAMPLE: (required) NXsample

name: (required) NX_CHAR

Descriptive name of sample

rotation_angle: (required) NX_FLOAT {units=NX_ANGLE}

Optional rotation angle for the case when the powder diagram has been obtained through an omega-2theta scan like from a traditional single detector powder diffractometer

MONITOR: (required) NXmonitor

mode: (required) NX_CHAR

Count to a preset value based on either clock time (timer) or received monitor counts (monitor).

Any of these values: monitor | timer

preset: (required) NX_FLOAT

preset value for time or monitor

integral: (required) NX_FLOAT {units=NX_ANY}

Total integral monitor counts

DATA: (required) NXdata

polar_angle: link (suggested target: /NXentry/NXinstrument/NXdetector/polar_angle)

Link to polar angle in /NXentry/NXinstrument/NXdetector

data: link (suggested target: /NXentry/NXinstrument/NXdetector/data)

Link to data in /NXentry/NXinstrument/NXdetector

Hypertext Anchors

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

documentation (reST source) anchor

web page (HTML) anchor

/NXmonopd/entry-group

#nxmonopd-entry-group

/NXmonopd/entry/DATA-group

#nxmonopd-entry-data-group

/NXmonopd/entry/DATA/data-link

#nxmonopd-entry-data-data-link

/NXmonopd/entry/DATA/polar_angle-link

#nxmonopd-entry-data-polar-angle-link

/NXmonopd/entry/definition-field

#nxmonopd-entry-definition-field

/NXmonopd/entry/INSTRUMENT-group

#nxmonopd-entry-instrument-group

/NXmonopd/entry/INSTRUMENT/CRYSTAL-group

#nxmonopd-entry-instrument-crystal-group

/NXmonopd/entry/INSTRUMENT/CRYSTAL/wavelength-field

#nxmonopd-entry-instrument-crystal-wavelength-field

/NXmonopd/entry/INSTRUMENT/DETECTOR-group

#nxmonopd-entry-instrument-detector-group

/NXmonopd/entry/INSTRUMENT/DETECTOR/data-field

#nxmonopd-entry-instrument-detector-data-field

/NXmonopd/entry/INSTRUMENT/DETECTOR/polar_angle-field

#nxmonopd-entry-instrument-detector-polar-angle-field

/NXmonopd/entry/INSTRUMENT/SOURCE-group

#nxmonopd-entry-instrument-source-group

/NXmonopd/entry/INSTRUMENT/SOURCE/name-field

#nxmonopd-entry-instrument-source-name-field

/NXmonopd/entry/INSTRUMENT/SOURCE/probe-field

#nxmonopd-entry-instrument-source-probe-field

/NXmonopd/entry/INSTRUMENT/SOURCE/type-field

#nxmonopd-entry-instrument-source-type-field

/NXmonopd/entry/MONITOR-group

#nxmonopd-entry-monitor-group

/NXmonopd/entry/MONITOR/integral-field

#nxmonopd-entry-monitor-integral-field

/NXmonopd/entry/MONITOR/mode-field

#nxmonopd-entry-monitor-mode-field

/NXmonopd/entry/MONITOR/preset-field

#nxmonopd-entry-monitor-preset-field

/NXmonopd/entry/SAMPLE-group

#nxmonopd-entry-sample-group

/NXmonopd/entry/SAMPLE/name-field

#nxmonopd-entry-sample-name-field

/NXmonopd/entry/SAMPLE/rotation_angle-field

#nxmonopd-entry-sample-rotation-angle-field

/NXmonopd/entry/start_time-field

#nxmonopd-entry-start-time-field

/NXmonopd/entry/title-field

#nxmonopd-entry-title-field

NXDL Source:

https://github.com/FAIRmat-Experimental/nexus_definitions/tree/fairmat/applications/NXmonopd.nxdl.xml