Electron diffraction instrumentation at the University of Arkansas from continuous beams to picosecond pulses: 1983 to 1998

John D. Ewbank; Vladimir A. Lobastov; Nikolai S. Vorobiev; Seong S. Seo; Anatoli A. Ischenko; Lothar Schaefer

doi:10.1117/12.350539

22 June 1999 Electron diffraction instrumentation at the University of Arkansas from continuous beams to picosecond pulses: 1983 to 1998

John D. Ewbank, Vladimir A. Lobastov, Nikolai S. Vorobiev, Seong S. Seo, Anatoli A. Ischenko, Lothar Schaefer

Author Affiliations +

Proceedings Volume 3516, 23rd International Congress on High-Speed Photography and Photonics; (1999) https://doi.org/10.1117/12.350539
Event: Twenty-Third International Congress on High-Speed Photography and Photonics, 1998, Moscow, Russian Federation

Abstract

After a brief overview of time-resolved electron diffraction experiments on a nanosecond time scale, more recent instrumental improvements are described which successfully extend the time resolution of the apparatus to the picosecond regime. Modifications described include a new sample inlet system, intensified detector, and electron pulse generation laser. Taken together, they have led to significant improvements in both signal level and ultimate time resolution; an upper estimate of the electron pulse width is approximately 20 ps. Enhancements are such that, for operation in the nanosecond time domain, an entire diffraction pattern over a useful range of scattering angles may be collected from a gas-phase sample in a single electron pulse.

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John D. Ewbank, Vladimir A. Lobastov, Nikolai S. Vorobiev, Seong S. Seo, Anatoli A. Ischenko, and Lothar Schaefer "Electron diffraction instrumentation at the University of Arkansas from continuous beams to picosecond pulses: 1983 to 1998", Proc. SPIE 3516, 23rd International Congress on High-Speed Photography and Photonics, (22 June 1999); https://doi.org/10.1117/12.350539

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