High-harmonic gyrotrons with irregular microwave systemsA.V. Savilov, I.V. Bandurkin, M.Yu. Glyavin, Yu.K. Kalynov, Yu.S. Oparina, I.V. Osharin and N.A. ZavolskyEPJ Web Conf., 195 (2018) 01015DOI: https://doi.org/10.1051/epjconf/201819501015