Plasma electron contribution to beam emittance growth from Coulomb collisions in plasma-based accelerators
ORAL
Abstract
Coulomb collisions with background plasma can cause emittance growth in plasma accelerators. This work extends the theory to consider collisions with not only motionless plasma ions, but also plasma electrons with relativistic motion, based on the Frankel cross-section. The theory is verified by particle-in-cell simulations with a Monte Carlo collision module. It is shown that the electron contribution has the same amount as that of ions in linear acceleration regime, and may not be negligible in nonlinear regime depending on the plasma electron density and its relativistic bulk velocity.
*The authors would like to thank all WarpX contributors. This work was supported by the Exascale Computing Project (17-SC-20-SC), a collaborative effort of the U.S. Department of Energy Office of Science and the National Nuclear Security Administration. This work was also supported by the Director, Office of Science, Office of High Energy Physics, U.S. Dept. of Energy under Contract No. DEAC02-05CH11231. This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.
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Publication:Y. Zhao, R. Lehe, A. Myers, M. Thevenet, A. Huebl, C. B. Schroeder, J.-L. Vay, Plasma electron contribution to beam emittance growth from Coulomb collisions in plasma-based accelerators, submitted to Physics of Plasmas.
Presenters
YINJIAN ZHAO
Lawrence Berkeley National Laboratory
Authors
YINJIAN ZHAO
Lawrence Berkeley National Laboratory
Remi Lehe
Lawrence Berkeley National Laboratory
Lawrence Berkeley National Laboratory, Berkeley, CA, USA
