Journal
STRUCTURAL DYNAMICS-US
Volume 1, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4882074
Keywords
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Funding
- Dutch Technology Foundation STW
- Applied Science Division of NWO
- Technology Programme of the Ministry of Economic Affairs
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The study of structural dynamics of complex macromolecular crystals using electrons requires bunches of sufficient coherence and charge. We present diffraction patterns from graphite, obtained with bunches from an ultracold electron source, based on femtosecond near-threshold photoionization of a laser-cooled atomic gas. By varying the photoionization wavelength, we change the effective source temperature from 300 K to 10 K, resulting in a concomitant change in the width of the diffraction peaks, which is consistent with independently measured source parameters. This constitutes a direct measurement of the beam coherence of this ultracold source and confirms its suitability for protein crystal diffraction. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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