NXsastof¶
Status:
application definition, extends NXobject
Description:
raw, 2-D SAS data with an area detector with a time-of-flight source
It covers all raw data from any SAS techniques that use an area detector at a time-of-flight source.
Symbols:
The symbol(s) listed here will be used below to coordinate datasets with the same shape.
nXPixel: nXPixel description
nYPixel: nYPixel description
nTOF: nTOF description
- Groups cited:
NXcollimator, NXdata, NXdetector, NXentry, NXgeometry, NXinstrument, NXmonitor, NXsample, NXshape, NXsource
Structure:
ENTRY: (required) NXentry
@entry: (required) NX_CHAR
NeXus convention is to use “entry1”, “entry2”, … for analysis software to locate each entry
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:
NXsastofinstrument: (required) NXinstrument
name: (required) NX_CHAR
Name of the instrument actually used to perform the experiment
source: (required) NXsource
collimator: (required) NXcollimator
geometry: (required) NXgeometry
detector: (required) NXdetector
data[nXPixel, nYPixel, nTOF]: (required) NX_NUMBER
This is area detector data, of number of x-pixel versus number of y-pixels. Since the beam center is to be determined as a step of data reduction, it is not necessary to document or assume the position of the beam center in acquired data.
time_of_flight[nTOF]: (required) NX_FLOAT {units=NX_TIME_OF_FLIGHT}
distance: (required) NX_FLOAT {units=NX_LENGTH}
The distance between detector and sample
x_pixel_size: (required) NX_FLOAT {units=NX_LENGTH}
Physical size of a pixel in x-direction
y_pixel_size: (required) NX_FLOAT {units=NX_LENGTH}
Size of a pixel in y direction
polar_angle: (required) NX_FLOAT {units=NX_ANGLE}
azimuthal_angle: (required) NX_FLOAT {units=NX_ANGLE}
rotation_angle: (required) NX_FLOAT {units=NX_ANGLE}
aequatorial_angle: (required) NX_FLOAT {units=NX_ANGLE}
beam_center_x: (required) NX_FLOAT {units=NX_LENGTH}
This is the x position where the direct beam would hit the detector. This is a length, not a pixel position, and can be outside of the actual detector.
beam_center_y: (required) NX_FLOAT {units=NX_LENGTH}
This is the y position where the direct beam would hit the detector. This is a length, not a pixel position, and can be outside of the actual detector.
sample: (required) NXsample
control: (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[nTOF]: (required) NX_INT
time_of_flight[nTOF]: (required) NX_FLOAT {units=NX_TIME_OF_FLIGHT}
data: (required) NXdata
Hypertext Anchors¶
Table of hypertext anchors for all groups, fields, attributes, and links defined in this class.
