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Can coherent Smith–Purcell radiation be used to determine the shape of an electron bunch?

ENEA, INN-FIS, Via Enrico Fermi 45, Divisione Fisica Applicata, P.O. Box, 65 I–00044 Frascati (Roma), Italy; Particle Physics Laboratory, University of Oxford, Oxford, UK OX1 3RH; Department of Physics, University of Essex, Colchester, UK CO4 3SQ; Department of Physics & Astronomy, Dartmouth College, Hanover, NH 03755-3528, USA
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (Impact Factor: 1.14). 01/2002; DOI: 10.1016/S0168-9002(02)00324-8

ABSTRACT Recent measurements at Frascati of the Smith–Purcell radiation emitted from the interaction of a 2.3 MeV (total) electron beam with a 2.5 mm grating show clear evidence of coherent enhancement of the radiation, with power levels exceeding 100 mW at emission angles around 90° relative to the beam direction. The experimental results are in reasonable agreement with theoretical predictions and suggest that Smith–Purcell radiation may offer a simple way of determining the shape and duration of short (picosecond) electron bunches.

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May 23, 2014