S L Sinitsky

Using Two-Dimensional Distributed Feedback for Synchronization of Radiation from Two Parallel-Sheet Electron Beams in a Free-Electron Maser.

V. D. Stepanov, M. Thumm, N. Ginzburg, 2016, Physical review letters.

Well-directed flux of megawatt sub-mm radiation generated by a relativistic electron beam in a magnetized plasma with strong density gradients

A. F. Rovenskikh, S. Kuznetsov, S. Polosatkin, 2020, Plasma Physics and Controlled Fusion.

Theory and design of a free-electron maser with two-dimensional feedback driven by a sheet electron beam.

I V Konoplev, I. Konoplev, A. Phelps, 1999, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.