3.3.2.8. NXmonopdΒΆ

Status:

application definition, extends NXobject, version 1.0b

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:

No symbol table
Groups cited:
NXcrystal, NXdata, NXdetector, NXentry, NXinstrument, NXmonitor, NXsample, NXsource

Structure:

entry: NXentry

title: NX_CHAR

start_time: NX_DATE_TIME

definition: NX_CHAR

Official NeXus NXDL schema to which this file conforms

Obligatory value: NXmonopd

(instrument): NXinstrument

(source): NXsource

type: NX_CHAR

name: NX_CHAR

probe: NX_CHAR

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

(crystal): NXcrystal

wavelength[i]: NX_FLOAT {units=NX_WAVELENGTH}

Optimum diffracted wavelength

(detector): NXdetector

polar_angle[ndet]: NX_FLOAT

where ndet = number of detectors

data[ndet]: NX_INT

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

(sample): NXsample

name: NX_CHAR

Descriptive name of sample

rotation_angle: 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): NXmonitor

mode: 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: NX_FLOAT

preset value for time or monitor

integral: NX_FLOAT {units=NX_ANY}

Total integral monitor counts

(data): NXdata

polar_angle –> /NXentry/NXinstrument/NXdetector/polar_angle

Link to polar angle in /NXentry/NXinstrument/NXdetector

data –> /NXentry/NXinstrument/NXdetector/data

Link to data in /NXentry/NXinstrument/NXdetector
NXDL Source:
https://github.com/nexusformat/definitions/blob/master/applications/NXmonopd.nxdl.xml