4.3.2.19. NXtas¶
Status:
application definition, extends NXobject
Description:
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
Obligatory value:
NXtasINSTRUMENT: (required) NXinstrument
SOURCE: (required) NXsource
monochromator: (required) NXcrystal
analyser: (required) NXcrystal
DETECTOR: (required) NXdetector
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) or received monitor counts (monitor).
Any of these values:
monitor|timerpreset: (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: link (suggested target:
/NXentry/NXinstrument/monochromator:NXcrystal/ei)ef: link (suggested target:
/NXentry/NXinstrument/analyser:NXcrystal/ef)en: link (suggested target:
/NXentry/NXsample/en)qh: link (suggested target:
/NXentry/NXsample/qh)qk: link (suggested target:
/NXentry/NXsample/qk)ql: link (suggested target:
/NXentry/NXsample/ql)data: link (suggested target:
/NXentry/NXinstrument/NXdetector/data)
Hypertext Anchors¶
List of hypertext anchors for all groups, fields, attributes, and links defined in this class.