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

.. index::
    ! NXxrot (application definition)
    ! xrot (application definition)
    see: xrot (application definition); NXxrot

.. _NXxrot:

======
NXxrot
======

**Status**:

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

**Description**:

  This is the application definition for raw data from a rotation camera.
  It extends NXxbase, so the full definition is the content of NXxbase
  plus the data defined here.

**Symbols**:

  No symbol table

**Groups cited**:
  :ref:`NXattenuator`, :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, NXattenuator (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:  ``NXxrot``

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


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


        .. index:: polar_angle (data field)

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

          The polar_angle (two theta) where the detector is placed.

        .. index:: beam_center_x (data field)

        **beam_center_x**: :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <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.

        .. index:: beam_center_y (data field)

        **beam_center_y**: :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_LENGTH <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.

      **attenuator**: :ref:`NXattenuator`


        .. index:: attenuator_transmission (data field)

        **attenuator_transmission**: :ref:`NX_FLOAT <NX_FLOAT>` {units=\ :ref:`NX_ANY <NX_ANY>`}


    **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 start angle at each  scan point

      .. index:: rotation_angle_step (data field)

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

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

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


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


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