학술논문
Tunable Plasma-Based Energy Dechirper
Document Type
article
Author
D'Arcy, R; Wesch, S; Aschikhin, A; Bohlen, S; Behrens, C; Garland, MJ; Goldberg, L; Gonzalez, P; Knetsch, A; Libov, V; de la Ossa, A Martinez; Meisel, M; Mehrling, TJ; Niknejadi, P; Poder, K; Röckemann, J-H; Schaper, L; Schmidt, B; Schröder, S; Palmer, C; Schwinkendorf, J-P; Sheeran, B; Streeter, MJV; Tauscher, G; Wacker, V; Osterhoff, J
Source
Physical Review Letters. 122(3)
Subject
Language
Abstract
A tunable plasma-based energy dechirper has been developed at FLASHForward to remove the correlated energy spread of a 681 MeV electron bunch. Through the interaction of the bunch with wakefields excited in plasma the projected energy spread was reduced from a FWHM of 1.31% to 0.33% without reducing the stability of the incoming beam. The experimental results for variable plasma density are in good agreement with analytic predictions and three-dimensional simulations. The proof-of-principle dechirping strength of 1.8 GeV/mm/m significantly exceeds those demonstrated for competing state-of-the-art techniques and may be key to future plasma wakefield-based free-electron lasers and high energy physics facilities, where large intrinsic chirps need to be removed.