Ultrafast electron diffraction using an ultracold source

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 la...

Full description

Saved in:
Bibliographic Details
Published in:Structural dynamics (Melville, N.Y.) N.Y.), 2014-05, Vol.1 (3), p.034302-034302
Main Authors: van Mourik, M. W., Engelen, W. J., Vredenbregt, E. J. D., Luiten, O. J.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2329-7778
2329-7778
DOI:10.1063/1.4882074