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Geometrical problems with a position‐sensitive detector employed on a diffractometer, including its use in the measurement of stress
Author(s) -
James M. R.,
Cohen J. B.
Publication year - 1979
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889879012656
Subject(s) - diffractometer , detector , position (finance) , reflection (computer programming) , resolution (logic) , optics , residual , residual stress , physics , tube (container) , stress (linguistics) , powder diffractometer , observational error , materials science , computational physics , mathematics , algorithm , computer science , diffraction , statistics , composite material , scanning electron microscope , linguistics , philosophy , finance , artificial intelligence , economics , programming language
Defocusing errors associated with the use of a one‐dimensional position‐sensitive proportional counter on a powder diffractometer are considered. These errors are small in the measurement of residual stress and it is not necessary to apply mathematical corrections, especially if the X‐ray tube is aligned properly. Correspondingly, these errors are small for high‐angle peaks in any reflection experiment compared with the present detector resolution. The equations presented allow for an evaluation of this error in most equipment configurations.