Experimental observation of helical microbunching of a relativistic electron beam
- 27 February 2012
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 100 (9), 091110
- https://doi.org/10.1063/1.3690900
Abstract
Experimental observation of the microbunching of a relativistic electron beam at the second harmonic interaction frequency of a helical undulator is presented. The microbunching signal is observed from the coherent transition radiation of the electron beam and indicates experimental evidence of a dominantly helical electron beam density distribution. This result is in agreement with theoretical and numerical predictions and provides a proof-of-principle demonstration of proposed schemes designed to generate light with orbital angular momentum in high-gain free-electron lasers.Keywords
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