Speaker
Dr
Roxana Tarkeshian
(Universität Bern)
Description
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)
Co-authors
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)
