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Optimisation of data collection and processing for efficient strain scanning

Webster, PJ and Kang, WP 2002, 'Optimisation of data collection and processing for efficient strain scanning' , Journal of Neutron Research, 10 (2) , pp. 93-110.

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Abstract

A constraint to the academic and industrial exploitation of neutron strain scanning is its cost in relation to that of alternative techniques. Generally, a large proportion of the resource cost is that for beam-time. The efficient utilisation of beam-time can be enhanced by optimising data collection and processing. The selection of three principal related factors -- detector range, angular step size and the counting time -- determines the data quality and uncertainties in defining the Bragg peak parameters required to determine strain. Theoretical and numerical analysis of computed and experimental data are used to establish a general set of well-founded, semi-empirical but theoretically-based, practical "rules of thumb" to be used when making strain measurements to a specified statistical uncertainty. The "rules" apply mostly to constant wavelength techniques where the angular position and other profile parameters of a single symmetrical Bragg peak are required but have relevance for fixed angle time-of-flight methods.

Item Type: Article
Uncontrolled Keywords: Strain scanning, strain uncertainties, numerical analysis, peak fitting, optimisation, diffraction
Themes: Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Civil Engineering Research Centre
Journal or Publication Title: Journal of Neutron Research
Publisher: Taylor & Francis
Refereed: Yes
ISSN: 10238166
Depositing User: H Kenna
Date Deposited: 05 Sep 2007 13:46
Last Modified: 20 Aug 2013 16:47
URI: http://usir.salford.ac.uk/id/eprint/395

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