A tunable plasma-based energy dechirper
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 ~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.
Cite
@article{arxiv.1810.06307,
title = {A tunable plasma-based energy dechirper},
author = {R. D'Arcy and S. Wesch and A. Aschikhin and S. Bohlen and C. Behrens and M. J. Garland and L. Goldberg and P. Gonzalez and A. Knetsch and V. Libov and A. Martinez de la Ossa and M. Meisel and T. J. Mehrling and P. Niknejadi and K. Poder and J. -H. Roeckemann and L. Schaper and B. Schmidt and S. Schroeder and C. Palmer and J. -P. Schwinkendorf and B. Sheeran and M. J. V. Streeter and G. Tauscher and V. Wacker and J. Osterhoff},
journal= {arXiv preprint arXiv:1810.06307},
year = {2019}
}