Crystallographic Information Framework

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Index

Image dictionary (imgCIF) version 1.3.2

Category DIFFRN_DETECTOR_ELEMENT

Name:
'diffrn_detector_element'

Description:

   Data items in the DIFFRN_DETECTOR_ELEMENT category record
   the details about spatial layout and other characteristics
   of each element of a detector which may have multiple elements.

   In most cases, giving more detailed information
   in ARRAY_STRUCTURE_LIST and ARRAY_STRUCTURE_LIST_AXIS
   is preferable to simply providing the centre of the 
   detector element.

Example:

Example 1 - Detector d1 is composed of four CCD detector elements, each 200 mm by 200 mm, arranged in a square, in the pattern 1 2 * 3 4 Note that the beam centre is slightly displaced from each of the detector elements, just beyond the lower right corner of 1, the lower left corner of 2, the upper right corner of 3 and the upper left corner of 4. 
 
        loop_
        _diffrn_detector_element.detector_id
        _diffrn_detector_element.id
        _diffrn_detector_element.center[1]
        _diffrn_detector_element.center[2]
        d1     d1_ccd_1  201.5 -1.5
        d1     d1_ccd_2  -1.8  -1.5
        d1     d1_ccd_3  201.6 201.4
        d1     d1_ccd_4  -1.7  201.5


Category groups:
    inclusive_group
    array_data_group
Category keys:
    _diffrn_detector_element.id
    _diffrn_detector_element.detector_id

Mandatory category: no


International Tables for Crystallography

Volume G: Definition and exchange of crystallographic data

First online edition (2006)

Edited by S. R. Hall and B. McMahon

An essential guide and reference to CIF for programmers, data managers handling crystal-structure information and practising crystallographers.