title: Subpicosecond electro-optic measurement of relativistic electron pulses
abstract: Time-resolved measurements of the transverse electric field associated with relativistic electron bunches are presented. Using an ultrafast electro-optic sensor close to the electron beam, the longitudinal profile of the electric field was measured with subpicosecond time resolution and without time-reversal ambiguity. Results are shown for two cases: inside the vacuum beam line in the presence of wake fields, and in air behind a beryllium window, effectively probing the near-field transition radiation. Especially in the latter case, reconstruction of the longitudinal electron bunch shape is straightforward.
authors.affiliation: School of Science and Engineering, University of Abertay Dundee, Bell Street, Dundee DD1 1HG, United Kingdom.
authors.initials: X
authors.lastname: Yan
authors.initials: AM
authors.lastname: MacLeod
authors.initials: WA
authors.lastname: Gillespie
authors.initials: GM
authors.lastname: Knippels
authors.initials: D
authors.lastname: Oepts
authors.lastname: van Der Meer AF
authors.initials: W
authors.lastname: Seidel