Ultrafast electron diffraction using an ultracold source

M.W. van Mourik, W.J. Engelen, E.J.D. Vredenbregt, O.J. Luiten

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)
89 Downloads (Pure)

Abstract

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.
Original languageEnglish
Article number034302
Pages (from-to)1-7
JournalStructural Dynamics
Volume1
Issue number3
DOIs
Publication statusPublished - 2014

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