.. auto-generated by script ../../../../utils/nxdl2rst.py from the NXDL source NXsas.nxdl.xml .. index:: ! NXsas (application definition) ! sas (application definition) see: sas (application definition); NXsas .. _NXsas: ===== NXsas ===== **Status**: application definition, extends :ref:`NXobject` **Description**: raw, monochromatic 2-D SAS data with an area detector This is an application definition for raw data (not processed or reduced data) from a 2-D small angle scattering instrument collected with a monochromatic beam and an area detector. It is meant to be suitable both for neutron SANS and X-ray SAXS data. It covers all raw data from any monochromatic SAS techniques that use an area detector: SAS, WSAS, grazing incidence, GISAS It covers all raw data from any SAS techniques that use an area detector and a monochromatic beam. **Symbols**: The symbol(s) listed here will be used below to coordinate datasets with the same shape. **nXPixel**: nXPixel description **nYPixel**: nYPixel description **Groups cited**: :ref:`NXcollimator`, :ref:`NXdata`, :ref:`NXdetector`, :ref:`NXentry`, :ref:`NXgeometry`, :ref:`NXinstrument`, :ref:`NXmonitor`, :ref:`NXmonochromator`, :ref:`NXsample`, :ref:`NXshape`, :ref:`NXsource` .. index:: NXentry (base class); used in application definition, NXinstrument (base class); used in application definition, NXsource (base class); used in application definition, NXmonochromator (base class); used in application definition, NXcollimator (base class); used in application definition, NXgeometry (base class); used in application definition, NXshape (base class); used in application definition, NXdetector (base class); used in application definition, NXsample (base class); used in application definition, NXmonitor (base class); used in application definition, NXdata (base class); used in application definition **Structure**: .. _/NXsas/ENTRY-group: **ENTRY**: (required) :ref:`NXentry` .. _/NXsas/ENTRY@entry-attribute: .. index:: entry (group attribute) **@entry**: (required) :ref:`NX_CHAR ` NeXus convention is to use ``entry1``, ``entry2``, ... for analysis software to locate each entry .. _/NXsas/ENTRY/title-field: .. index:: title (field) **title**: (required) :ref:`NX_CHAR ` .. _/NXsas/ENTRY/start_time-field: .. index:: start_time (field) **start_time**: (required) :ref:`NX_DATE_TIME ` .. _/NXsas/ENTRY/end_time-field: .. index:: end_time (field) **end_time**: (required) :ref:`NX_DATE_TIME ` .. _/NXsas/ENTRY/definition-field: .. index:: definition (field) **definition**: (required) :ref:`NX_CHAR ` Official NeXus NXDL schema to which this file conforms Obligatory value: ``NXsas`` .. _/NXsas/ENTRY/instrument-group: **instrument**: (required) :ref:`NXinstrument` .. _/NXsas/ENTRY/instrument/name-field: .. index:: name (field) **name**: (required) :ref:`NX_CHAR ` Name of the instrument actually used to perform the experiment .. _/NXsas/ENTRY/instrument/source-group: **source**: (required) :ref:`NXsource` .. _/NXsas/ENTRY/instrument/source/type-field: .. index:: type (field) **type**: (required) :ref:`NX_CHAR ` type of radiation source .. _/NXsas/ENTRY/instrument/source/name-field: .. index:: name (field) **name**: (required) :ref:`NX_CHAR ` Name of the radiation source .. _/NXsas/ENTRY/instrument/source/probe-field: .. index:: probe (field) **probe**: (required) :ref:`NX_CHAR ` Any of these values: ``neutron`` | ``x-ray`` .. _/NXsas/ENTRY/instrument/monochromator-group: **monochromator**: (required) :ref:`NXmonochromator` .. _/NXsas/ENTRY/instrument/monochromator/wavelength-field: .. index:: wavelength (field) **wavelength**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_WAVELENGTH `} The wavelength of the radiation .. _/NXsas/ENTRY/instrument/monochromator/wavelength_spread-field: .. index:: wavelength_spread (field) **wavelength_spread**: (required) :ref:`NX_FLOAT ` delta_lambda/lambda (:math:`\Delta\lambda/\lambda`): Important for resolution calculations .. _/NXsas/ENTRY/instrument/collimator-group: **collimator**: (required) :ref:`NXcollimator` .. _/NXsas/ENTRY/instrument/collimator/geometry-group: **geometry**: (required) :ref:`NXgeometry` .. _/NXsas/ENTRY/instrument/collimator/geometry/shape-group: **shape**: (required) :ref:`NXshape` .. _/NXsas/ENTRY/instrument/collimator/geometry/shape/shape-field: .. index:: shape (field) **shape**: (required) :ref:`NX_CHAR ` Any of these values: ``nxcylinder`` | ``nxbox`` .. _/NXsas/ENTRY/instrument/collimator/geometry/shape/size-field: .. index:: size (field) **size**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} The collimation length .. _/NXsas/ENTRY/instrument/detector-group: **detector**: (required) :ref:`NXdetector` .. _/NXsas/ENTRY/instrument/detector/data-field: .. index:: data (field) **data[nXPixel, nYPixel]**: (required) :ref:`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. .. _/NXsas/ENTRY/instrument/detector/distance-field: .. index:: distance (field) **distance**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} The distance between detector and sample .. _/NXsas/ENTRY/instrument/detector/x_pixel_size-field: .. index:: x_pixel_size (field) **x_pixel_size**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} Physical size of a pixel in x-direction .. _/NXsas/ENTRY/instrument/detector/y_pixel_size-field: .. index:: y_pixel_size (field) **y_pixel_size**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_LENGTH `} Size of a pixel in y direction .. _/NXsas/ENTRY/instrument/detector/polar_angle-field: .. index:: polar_angle (field) **polar_angle**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_ANGLE `} .. _/NXsas/ENTRY/instrument/detector/azimuthal_angle-field: .. index:: azimuthal_angle (field) **azimuthal_angle**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_ANGLE `} .. _/NXsas/ENTRY/instrument/detector/rotation_angle-field: .. index:: rotation_angle (field) **rotation_angle**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_ANGLE `} .. _/NXsas/ENTRY/instrument/detector/aequatorial_angle-field: .. index:: aequatorial_angle (field) **aequatorial_angle**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_ANGLE `} .. _/NXsas/ENTRY/instrument/detector/beam_center_x-field: .. index:: beam_center_x (field) **beam_center_x**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`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. .. _/NXsas/ENTRY/instrument/detector/beam_center_y-field: .. index:: beam_center_y (field) **beam_center_y**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`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. .. _/NXsas/ENTRY/sample-group: **sample**: (required) :ref:`NXsample` .. _/NXsas/ENTRY/sample/name-field: .. index:: name (field) **name**: (required) :ref:`NX_CHAR ` Descriptive name of sample .. _/NXsas/ENTRY/sample/aequatorial_angle-field: .. index:: aequatorial_angle (field) **aequatorial_angle**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_ANGLE `} .. _/NXsas/ENTRY/control-group: **control**: (required) :ref:`NXmonitor` .. _/NXsas/ENTRY/control/mode-field: .. index:: mode (field) **mode**: (required) :ref:`NX_CHAR ` Count to a preset value based on either clock time (timer) or received monitor counts (monitor). Any of these values: ``monitor`` | ``timer`` .. _/NXsas/ENTRY/control/preset-field: .. index:: preset (field) **preset**: (required) :ref:`NX_FLOAT ` preset value for time or monitor .. _/NXsas/ENTRY/control/integral-field: .. index:: integral (field) **integral**: (required) :ref:`NX_FLOAT ` {units=\ :ref:`NX_ANY `} Total integral monitor counts .. _/NXsas/ENTRY/data-group: **data**: (required) :ref:`NXdata` .. _/NXsas/ENTRY/data/data-link: **data**: :ref:`link` (suggested target: ``/NXentry/NXinstrument/NXdetector/data``) 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 ==================================================================================================================================== ==================================================================================================================================== :ref:`/NXsas/ENTRY-group ` :ref:`#nxsas-entry-group ` :ref:`/NXsas/ENTRY/control-group ` :ref:`#nxsas-entry-control-group ` :ref:`/NXsas/ENTRY/control/integral-field ` :ref:`#nxsas-entry-control-integral-field ` :ref:`/NXsas/ENTRY/control/mode-field ` :ref:`#nxsas-entry-control-mode-field ` :ref:`/NXsas/ENTRY/control/preset-field ` :ref:`#nxsas-entry-control-preset-field ` :ref:`/NXsas/ENTRY/data-group ` :ref:`#nxsas-entry-data-group ` :ref:`/NXsas/ENTRY/data/data-link ` :ref:`#nxsas-entry-data-data-link ` :ref:`/NXsas/ENTRY/definition-field ` :ref:`#nxsas-entry-definition-field ` :ref:`/NXsas/ENTRY/end_time-field ` :ref:`#nxsas-entry-end-time-field ` :ref:`/NXsas/ENTRY/instrument-group ` :ref:`#nxsas-entry-instrument-group ` :ref:`/NXsas/ENTRY/instrument/collimator-group ` :ref:`#nxsas-entry-instrument-collimator-group ` :ref:`/NXsas/ENTRY/instrument/collimator/geometry-group ` :ref:`#nxsas-entry-instrument-collimator-geometry-group ` :ref:`/NXsas/ENTRY/instrument/collimator/geometry/shape-group ` :ref:`#nxsas-entry-instrument-collimator-geometry-shape-group ` :ref:`/NXsas/ENTRY/instrument/collimator/geometry/shape/shape-field ` :ref:`#nxsas-entry-instrument-collimator-geometry-shape-shape-field ` :ref:`/NXsas/ENTRY/instrument/collimator/geometry/shape/size-field ` :ref:`#nxsas-entry-instrument-collimator-geometry-shape-size-field ` :ref:`/NXsas/ENTRY/instrument/detector-group ` :ref:`#nxsas-entry-instrument-detector-group ` :ref:`/NXsas/ENTRY/instrument/detector/aequatorial_angle-field ` :ref:`#nxsas-entry-instrument-detector-aequatorial-angle-field ` :ref:`/NXsas/ENTRY/instrument/detector/azimuthal_angle-field ` :ref:`#nxsas-entry-instrument-detector-azimuthal-angle-field ` :ref:`/NXsas/ENTRY/instrument/detector/beam_center_x-field ` :ref:`#nxsas-entry-instrument-detector-beam-center-x-field ` :ref:`/NXsas/ENTRY/instrument/detector/beam_center_y-field ` :ref:`#nxsas-entry-instrument-detector-beam-center-y-field ` :ref:`/NXsas/ENTRY/instrument/detector/data-field ` :ref:`#nxsas-entry-instrument-detector-data-field ` :ref:`/NXsas/ENTRY/instrument/detector/distance-field ` :ref:`#nxsas-entry-instrument-detector-distance-field ` :ref:`/NXsas/ENTRY/instrument/detector/polar_angle-field ` :ref:`#nxsas-entry-instrument-detector-polar-angle-field ` :ref:`/NXsas/ENTRY/instrument/detector/rotation_angle-field ` :ref:`#nxsas-entry-instrument-detector-rotation-angle-field ` :ref:`/NXsas/ENTRY/instrument/detector/x_pixel_size-field ` :ref:`#nxsas-entry-instrument-detector-x-pixel-size-field ` :ref:`/NXsas/ENTRY/instrument/detector/y_pixel_size-field ` :ref:`#nxsas-entry-instrument-detector-y-pixel-size-field ` :ref:`/NXsas/ENTRY/instrument/monochromator-group ` :ref:`#nxsas-entry-instrument-monochromator-group ` :ref:`/NXsas/ENTRY/instrument/monochromator/wavelength-field ` :ref:`#nxsas-entry-instrument-monochromator-wavelength-field ` :ref:`/NXsas/ENTRY/instrument/monochromator/wavelength_spread-field ` :ref:`#nxsas-entry-instrument-monochromator-wavelength-spread-field ` :ref:`/NXsas/ENTRY/instrument/name-field ` :ref:`#nxsas-entry-instrument-name-field ` :ref:`/NXsas/ENTRY/instrument/source-group ` :ref:`#nxsas-entry-instrument-source-group ` :ref:`/NXsas/ENTRY/instrument/source/name-field ` :ref:`#nxsas-entry-instrument-source-name-field ` :ref:`/NXsas/ENTRY/instrument/source/probe-field ` :ref:`#nxsas-entry-instrument-source-probe-field ` :ref:`/NXsas/ENTRY/instrument/source/type-field ` :ref:`#nxsas-entry-instrument-source-type-field ` :ref:`/NXsas/ENTRY/sample-group ` :ref:`#nxsas-entry-sample-group ` :ref:`/NXsas/ENTRY/sample/aequatorial_angle-field ` :ref:`#nxsas-entry-sample-aequatorial-angle-field ` :ref:`/NXsas/ENTRY/sample/name-field ` :ref:`#nxsas-entry-sample-name-field ` :ref:`/NXsas/ENTRY/start_time-field ` :ref:`#nxsas-entry-start-time-field ` :ref:`/NXsas/ENTRY/title-field ` :ref:`#nxsas-entry-title-field ` :ref:`/NXsas/ENTRY@entry-attribute ` :ref:`#nxsas-entry-entry-attribute ` ==================================================================================================================================== ==================================================================================================================================== **NXDL Source**: https://github.com/FAIRmat-Experimental/nexus_definitions/tree/fairmat/applications/NXsas.nxdl.xml