Mitigation of the Microbunching Instability Through Transverse Landau Damping
Accelerator Physics
2024-07-26 v1
Abstract
The microbunching instability has been a long-standing issue for high-brightness free-electron lasers (FELs), and is a significant show-stopper to achieving full longitudinal coherence in the x-ray regime. This paper reports the first experimental demonstration of microbunching instability mitigation through transverse Landau damping, based on linear optics control in a dispersive region. Analytical predictions for the microbunching content are supported by numerical calculations of the instability gain and confirmed through the experimental characterization of the spectral brightness of the FERMI FEL under different transverse optics configurations of the transfer line between the linear accelerator and the FEL.
Keywords
Cite
@article{arxiv.2403.11594,
title = {Mitigation of the Microbunching Instability Through Transverse Landau Damping},
author = {A. D. Brynes and G. Perosa and C. -Y. Tsai and E. Allaria and L. Badano and G. De Ninno and E. Ferrari and D. Garzella and L. Giannessi and G. Penco and P. Rebernik Ribič and E. Roussel and S. Spampinati and C. Spezzani and M. Trovò and M. Veronese and S. Di Mitri},
journal= {arXiv preprint arXiv:2403.11594},
year = {2024}
}