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Engelen WJ, van der Heijden MA, Bakker DJ, et al. High-coherence electron bunches produced by femtosecond photoionization. Nat Commun. 2013;4:1693doi: 10.1038/ncomms2700.
Engelen, W. J., van der Heijden, M. A., Bakker, D. J., Vredenbregt, E. J., & Luiten, O. J. (2013). High-coherence electron bunches produced by femtosecond photoionization. Nature communications, 41693. https://doi.org/10.1038/ncomms2700
Engelen, W J, et al. "High-coherence electron bunches produced by femtosecond photoionization." Nature communications vol. 4 (2013): 1693. doi: https://doi.org/10.1038/ncomms2700
Engelen WJ, van der Heijden MA, Bakker DJ, Vredenbregt EJ, Luiten OJ. High-coherence electron bunches produced by femtosecond photoionization. Nat Commun. 2013;4:1693. doi: 10.1038/ncomms2700. PMID: 23591860.
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Nat Commun. 2013;4:1693. doi: 10.1038/ncomms2700.

High-coherence electron bunches produced by femtosecond photoionization.

Nature communications

W J Engelen, M A van der Heijden, D J Bakker, E J D Vredenbregt, O J Luiten

Affiliations

  1. Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands.

PMID: 23591860 DOI: 10.1038/ncomms2700

Abstract

With the development of ultrafast electron and X-ray sources it is becoming possible to study structural dynamics with atomic-level spatial and temporal resolution. Because of their short mean free path, electrons are particularly well suited for investigating surfaces and thin films, such as the challenging and important class of membrane proteins. To perform single-shot diffraction experiments on protein crystals, an ultracold electron source was proposed, based on near-threshold photoionization of laser-cooled atoms, which is capable of producing electron pulses of both high intensity and high coherence. Here we show that high coherence electron pulses can be produced by femtosecond photoionization, opening up a new regime of ultrafast structural dynamics experiments. The transverse coherence turns out to be much better than expected on the basis of the large bandwidth of the femtosecond ionization laser pulses. This surprising result can be explained by analysis of classical electron trajectories.

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