3.3.2.37. NXtas

Status:

application definition, extends NXobject

Description:

This is an application definition for a triple axis spectrometer. …

This is an application definition for a triple axis spectrometer.

It is for the trademark scan of the TAS, the Q-E scan. For your alignment scans use the rules in NXscan.

Symbols:

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

nP: Number of points

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 …

Official NeXus NXDL schema to which this file conforms

Obligatory value: NXtas

INSTRUMENT: (required) NXinstrument ⤆

SOURCE: (required) NXsource ⤆

name: (required) NX_CHAR ⤆

probe: (required) NX_CHAR ⤆

Any of these values: neutron | x-ray

monochromator: (required) NXcrystal ⤆

ei: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ENERGY}

rotation_angle: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE}

analyser: (required) NXcrystal ⤆

ef: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ENERGY}

rotation_angle: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE}

polar_angle: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE} ⤆

DETECTOR: (required) NXdetector ⤆

data: (required) NX_INT (Rank: 1, Dimensions: [nP])

polar_angle: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE} ⤆

SAMPLE: (required) NXsample ⤆

name: (required) NX_CHAR ⤆

Descriptive name of sample

qh: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_DIMENSIONLESS}

qk: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_DIMENSIONLESS}

ql: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_DIMENSIONLESS}

en: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ENERGY}

rotation_angle: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE} ⤆

polar_angle: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE}

sgu: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE}

sgl: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANGLE}

unit_cell: (required) NX_FLOAT (Rank: 1, Dimensions: [6]) {units=NX_LENGTH} ⤆

orientation_matrix: (required) NX_FLOAT (Rank: 1, Dimensions: [9]) {units=NX_DIMENSIONLESS} ⤆

MONITOR: (required) NXmonitor ⤆

mode: (required) NX_CHAR ⤆

Count to a preset value based on either clock time (timer) …

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

data: (required) NX_FLOAT (Rank: 1, Dimensions: [nP]) {units=NX_ANY}

Total integral monitor counts

DATA: (required) NXdata ⤆

One of the ei,ef,qh,qk,ql,en should get a primary=1 attribute to denote the main scan axis

ei: (required) NX_CHAR

ef: (required) NX_CHAR

en: (required) NX_CHAR

qh: (required) NX_CHAR

qk: (required) NX_CHAR

ql: (required) NX_CHAR

data: (required) NX_CHAR

Hypertext Anchors

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

NXDL Source:

https://github.com/nexusformat/definitions/blob/main/applications/NXtas.nxdl.xml