Sep 24 – 30, 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

Plasma-based diagnostics of High-Brightness Electron Beams at the frontier of Temporal and Spatial Resolution

Sep 26, 2017, 4:00 PM
SB1, Sala Bonaparte 1, HH

SB1, Sala Bonaparte 1, HH

talk WG5 - High-Gradient Plasma Structures/Advanced Beam Diagnostics WG5_Parallel


Dr Roxana Tarkeshian (Universität Bern)


We present a novel diagnostics to characterize high brightness electron beams. The technique, based on the tunnel ionization of a neutral gas by the intense (GV/m) self-field of the electron beam, can be used to measure the volumetric charge density of the beam; e. g. to reconstruct pulse durations shorter than few femtoseconds or to measure transverse beam sizes below the micron level. Results from analytical (Ammosov Delone Krainov (ADK) model) and particle-in- cell code simulations will be discussed up to beam durations that approach the through-the- barrier tunneling times, where deviations from the ADK model are expected. Experiments with sub femtosecond unipolar self-field of electron beam, could further deepen our understanding of quantum tunneling process. We finally present practical implementation of this new diagnostics at LCLS, in the XLEAP* experiment, and laser plasma accelerator BELLA.

Primary author

Dr Roxana Tarkeshian (Universität Bern)


Dr Eduard Prat (PSI) Dr Patrick Krejcik (SLAC) Dr Rasmus Ischebeck (PSI) Dr Remi Lehe (Lawrence Berkeley National Laboratory) Prof. Thomas Feurer (University of Bern) Dr Wim Leemans (Lawrence Berkeley National Laboratory)

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