Femtosecond x-ray pulse characterization in free-electron lasers using a cross-correlation technique

We report the first measurements of x-ray single-pulse duration and two-pulse separation at the Linac Coherent Light Source using a cross-correlation technique involving x rays and electrons. An emittance-spoiling foil is adopted as a very simple and effective method to control the output x-ray puls...

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Published inPhysical review letters Vol. 109; no. 25; p. 254802
Main Authors Ding, Y, Decker, F-J, Emma, P, Feng, C, Field, C, Frisch, J, Huang, Z, Krzywinski, J, Loos, H, Welch, J, Wu, J, Zhou, F
Format Journal Article
LanguageEnglish
Published United States 20.12.2012
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Summary:We report the first measurements of x-ray single-pulse duration and two-pulse separation at the Linac Coherent Light Source using a cross-correlation technique involving x rays and electrons. An emittance-spoiling foil is adopted as a very simple and effective method to control the output x-ray pulse. A minimum pulse duration of about 3 fs full width at half maximum has been measured together with a controllable pulse separation (delay) between two pulses. This technique provides critical temporal diagnostics for x-ray experiments such as x-ray pump-probe studies.
ISSN:1079-7114
DOI:10.1103/physrevlett.109.254802