.. $Id: element_SAScollimation.rst 255 2012-08-31 21:09:59Z prjemian $ .. index:: ! element; SAScollimation .. _SAScollimation: ============================ *SAScollimation* ============================ parent: :ref:`SASinstrument` .. figure:: ../../graphics/6-SAScollimation.png The *SAScollimation* element .. index:: element; length element; aperture ============================== =========== ============ =========================================== ==================================== Name Type Occurrence Description Attributes ============================== =========== ============ =========================================== ==================================== *length* float [0..1] Amount/length of collimation inserted *unit={unit}* [#units]_ (on a SANS instrument) :ref:`SAScollimation.aperture` container [0..inf] Description of a slit or aperture. *name*: Optional name attribute for this *name={name}* aperture. *type*: Optional text attribute to *type={type}* describe the type of aperture (pinhole, 4-blade slit, Soller slit, ...). ============================== =========== ============ =========================================== ==================================== .. _SAScollimation.aperture: aperture =========== .. index:: element; size element; distance =========================== =========== ============ =========================================== ==================================== Name Type Occurrence Description Attributes =========================== =========== ============ =========================================== ==================================== :ref:`SAScollimation.size` container [0..1] Opening dimensions of this aperture. *name={name}* *distance* float [0..1] Distance from this collimation element *unit={unit}* [#units]_ to the sample. =========================== =========== ============ =========================================== ==================================== .. _SAScollimation.size: size =========== See the figures in :ref:`axes definition`. .. index:: geometry; translation element; x element; y element; z ====================== =========== ============ =========================================== ==================================== Name Type Occurrence Description Attributes ====================== =========== ============ =========================================== ==================================== :math:`x` float [0..1] Dimension of the collimation in X. *unit={unit}* [#units]_ :math:`y` float [0..1] Dimension of the collimation in Y. *unit={unit}* [#units]_ :math:`z` float [0..1] Dimension of the collimation in Z. *unit={unit}* [#units]_ [#Z]_ ====================== =========== ============ =========================================== ==================================== --------------- .. rubric:: Table Notes .. [#units] The *unit* attribute is required. See :ref:`rules` for acceptable values. .. [#Z] While :math:`z` is allowed by the standard (provided by use of a standard *size* element in the XML Schema), it does not make sense to use it for small-angle scattering. Use of :math:`z` here may be ignored by processing software.