Chirp Mitigation of Plasma-Accelerated Beams by a Modulated Plasma Density

Author(s): Brinkmann, R; Delbos, N; Dornmair, I; Kirchen, M; Assmann, R; Behrens, C; Floettmann, K; Grebenyuk, J; Gross, M; Jalas, S; Mehrling, T; Martinez De La Ossa, A; Osterhoff, J; Schmidt, B; Wacker, V; Maier, AR | Abstract: © 2017 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the https://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Plasma-based accelerators offer the possibility to drive future compact light sources and high-energy physics applications. Achieving good beam quality, especially a small beam energy spread, is still one of the major challenges. Here, we propose to use a periodically modulated plasma density to shape the longitudinal fields acting on an electron bunch in the linear wakefield regime. With simulations, we demonstrate an on-average flat accelerating field that maintains a small beam energy spread.