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Common arc method for diffraction pattern orientation

Common arc method for diffraction pattern orientation Very short pulses of X‐ray free‐electron lasers opened the way to obtaining diffraction signal from single particles beyond the radiation dose limit. For three‐dimensional structure reconstruction many patterns are recorded in the object's unknown orientation. A method is described for the orientation of continuous diffraction patterns of non‐periodic objects, utilizing intensity correlations in the curved intersections of the corresponding Ewald spheres, and hence named the common arc orientation method. The present implementation of the algorithm optionally takes into account Friedel's law, handles missing data and is capable of determining the point group of symmetric objects. Its performance is demonstrated on simulated diffraction data sets and verification of the results indicates a high orientation accuracy even at low signal levels. The common arc method fills a gap in the wide palette of orientation methods. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section A Foundations of Crystallography Wiley

Common arc method for diffraction pattern orientation

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Publisher
Wiley
Copyright
Copyright © 2011 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0108-7673
eISSN
1600-5724
DOI
10.1107/S0108767311036269
pmid
22011469
Publisher site
See Article on Publisher Site

Abstract

Very short pulses of X‐ray free‐electron lasers opened the way to obtaining diffraction signal from single particles beyond the radiation dose limit. For three‐dimensional structure reconstruction many patterns are recorded in the object's unknown orientation. A method is described for the orientation of continuous diffraction patterns of non‐periodic objects, utilizing intensity correlations in the curved intersections of the corresponding Ewald spheres, and hence named the common arc orientation method. The present implementation of the algorithm optionally takes into account Friedel's law, handles missing data and is capable of determining the point group of symmetric objects. Its performance is demonstrated on simulated diffraction data sets and verification of the results indicates a high orientation accuracy even at low signal levels. The common arc method fills a gap in the wide palette of orientation methods.

Journal

Acta Crystallographica Section A Foundations of Crystallography – Wiley

Published: Jan 1, 2011

Keywords: ; ; ; ; ; ; ;

References