Author(s): N. Sudar, P. Musumeci, J. Duris, I. Gadjev, M. Polyanskiy, I. Pogorelsky, M. Fedurin, C. Swinson, K. Kusche, M. Babzien, and A. Gover
An unprecedented amount of energy extracted from a relativistic electron beam is converted into coherent radiation, a result that could enable high-average-power light sources to be created.

[Phys. Rev. Lett. 117, 174801] Published Wed Oct 19, 2016