.. auto-generated by script ../../../../utils/nxdl2rst.py from the NXDL source ../../../../applications/NXxnb.nxdl.xml

.. index::
    ! NXxnb (application definition)
    ! xnb (application definition)
    see: xnb (application definition); NXxnb

.. _NXxnb:

=====
NXxnb
=====

**Status**:

  application definition, extends :ref:`NXxbase`, version 1.0b

**Description**:

  This is the application definition for raw data from a single crystal diffractometer
  measuring in normal beam mode. It extends NXxbase, so the full definition is the content of
  NXxbase plus the data defined here. All angles are logged in order to support arbitrary scans in
  reciprocal space.

**Symbols**:

  No symbol table

**Groups cited**:
  :ref:`NXdata`, :ref:`NXdetector`, :ref:`NXentry`, :ref:`NXinstrument`, :ref:`NXsample`

.. index:: NXentry (base class); used in application definition, NXinstrument (base class); used in application definition, NXdetector (base class); used in application definition, NXsample (base class); used in application definition, NXdata (base class); used in application definition

**Structure**:

  **entry**: :ref:`NXentry`


    .. index:: definition (data field)

    **definition**: :ref:`NX_CHAR <NX_CHAR>`

      Official NeXus NXDL schema to which this file conforms

      Obligatory value:  ``NXxnb``

    **instrument**: :ref:`NXinstrument`


      **detector**: :ref:`NXdetector`


        .. index:: polar_angle (data field)

        **polar_angle[np]**: :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_ANGLE <NX_ANGLE>`}

          The polar_angle (gamma) of the detector for each scan point.

        .. index:: tilt_angle (data field)

        **tilt_angle[np]**: :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_ANGLE <NX_ANGLE>`}

          The angle by which the detector has been tilted out of the
          scattering plane.

    **sample**: :ref:`NXsample`


      .. index:: rotation_angle (data field)

      **rotation_angle[np]**: :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_ANGLE <NX_ANGLE>`}

        This is an array holding the sample rotation angle at each
        scan point

    **name**: :ref:`NXdata`


      **polar_angle** --> /NXentry/NXinstrument/NXdetector/polar_angle


      **tilt** --> /NXentry/NXinstrument/NXdetector/tilt


      **rotation_angle** --> /NXentry/NXsample/rotation_angle


**Source**:
  Automatically generated from https://github.com/nexusformat/definitions/blob/master/applications/NXxnb.nxdl.xml