Journal Article

PUBDB-2015-01194

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Few-Femtosecond Time-Resolved Measurements of X-ray Free-Electron Lasers

Decker, F.-J. ; Ding, Y. (Corresponding Author) ; Dolgashev, V. A. ; Frisch, J.>Extern* ; Krejcik, P. (Corresponding author) ; Loos, H. ; Lutman, A. ; Maxwell, T. J. ; Turner, J. ; Wang, M.-H. ; Behrens, C.DESY* ; Huang, Z. ; Wang, J. ; Welch, J. ; Wu, J.

2014
Nature Publishing Group London

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Please use a persistent id in citations: doi:10.1038/ncomms4762

Abstract: X-ray free-electron lasers, with pulse durations ranging from a few to several hundred femtoseconds, are uniquely suited for studying atomic, molecular, chemical and biological systems. Characterizing the temporal profiles of these femtosecond X-ray pulses that vary from shot to shot is not only challenging but also important for data interpretation. Here we report the time-resolved measurements of X-ray free-electron lasers by using an X-band radiofrequency transverse deflector at the Linac Coherent Light Source. We demonstrate this method to be a simple, non-invasive technique with a large dynamic range for single-shot electron and X-ray temporal characterization. A resolution of less than 1 fs root mean square has been achieved for soft X-ray pulses. The lasing evolution along the undulator has been studied with the electron trapping being observed as the X-ray peak power approaches 100 GW.

Note: (c) Macmillan Publishers Limited. Post referee full text in progress.

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Contributing Institute(s):

1. Beschleunigerphysik (MPY)

Research Program(s):

1. No facility / HGF program None (POF2-890) (POF2-890)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2014

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