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Persistent URL http://purl.org/net/epubs/work/22644332
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Record Id 22644332
Title Single-shot Multi-MeV Ultrafast Electron Diffraction on VELA at Daresbury Laboratory
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Abstract Accelerator based Ultrafast Electron Diffraction (UED) is a technique for obtaining static structures and for studying sub-100 fs dynamic structural changes on the atomic scale. In this paper we present the first electron diffraction results obtained from the VELA accelerator in 2014. The accelerator was operated to provide typically 4MeV/c electron bunches. Diffraction patterns were observed with <<1 pC transported to the detection screen. Single shot and multi-shot accumulated diffraction data are presented from single crystal and polycrystalline samples, including Au, Al, Pt and C. Contamination of the diffraction pattern with dark current contributions is an issue. A variable size aperture directly in front of the sample offers some mitigation, but at the expense of reduced charge contributing to the diffraction pattern. We discuss future developments for electron diffraction on VELA including further beam optimization, measurement of bunch length with a newly installed Transverse Deflecting Cavity, and the planned developments for pump-probe studies.
Organisation ASTeC , ASTeC-AP , STFC
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Language English (EN)
Type Details URI(s) Local file(s) Year
Paper In Conference Proceedings In 6th International Particle Accelerator Conference (IPAC'15), Richmond, VA, USA, June 2015, (2015). https://jacowfs.j…repress/TUPWI017.PDF 2015