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<title>(IUCr) CIF Definition save__diffrn_detector_element.reference_center_fast</title>
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<p class="title">DRAFT DICTIONARY</p>
<p class="title"><font class="smalltitle"></font>CBF/imgCIF Extensions Dictionary</p>
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<p class="title">Draft version 1.5 for comment</p>
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<h5>Image dictionary (imgCIF) version 1.5.4</h5>
<h1>_diffrn_detector_element.reference_center_fast</h1><b>Name:</b><br /><tt class="cifdefinition">'_diffrn_detector_element.reference_center_fast'</tt>
<p><b>Definition:</b></p><pre class="cifdefinition">
The value of <a href="Idiffrn_detector_element.reference_center_fast.html" class="itemlink">_diffrn_detector_element.reference_center_fast</a> is
the fast index axis beam center position relative to the detector
element face in the units specified in the data item
'<a href="Idiffrn_detector_element.reference_center_units.html" class="itemlink">_diffrn_detector_element.reference_center_units</a>' along the fast
axis of the detector from the center of the first pixel to
the point at which the Z-axis (which should be colinear with the
beam) intersects the face of the detector, if in fact is does.
At the time of the measurement all settings of the detector
positioner should be at their reference settings. If more than
one reference setting has been used the value given whould be
representive of the beam center as determined from the ensemble
of settings.
It is important to note that for measurements in millimetres,
the sense of the axis is used, rather than the sign of the
pixel-to-pixel increments.
</pre>
<p><b>Type:</b> float</p>
<p class="pack"><b>Mandatory item:</b> no</p>
<p class="pack"><b>Category:</b> <a href="Cdiffrn_detector_element.html" class="catlink">diffrn_detector_element</a></p>
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HTML version of draft dictionary created by modified version of makedicthtml by B. McMahon
from modified version of imgCIF dcitionary 1.3.2 which is subject to the following copyright:
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