N. S. Ginzburg, A. M. Malkin, A. S. Sergeev, I. V. Zheleznov, I. V. Zotova, V. Yu. Zaslavsky, G. Sh. Boltachev, K. A. Sharypov, S. A. Shunailov, M. R. Ul’masculov, and M. I. Yalandin
https://journals.aps.org/prl/accepted/5d073Y8eG861f051b61816e2430e18bd13acaaafd
The first experiments on observation of short pulsed superradiant (SR) emission with excitation of a surface wave by a relativistic electron bunch moving in oversized corrugated waveguide were performed. Sub-terahertz SR pulses with the central frequency of 0.14 THz, ultrashort duration of 150 ps and an extremely high peak power of 50-70 MW were generated. The experiments were based on a theoretical consideration including the quasi-optical approach and direct particle-in-cell simulations.
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