CW subterahertz gyrotron operating at high cyclotron harmonicsIlya Bandurkin, Nikolay Zavolsky, Yuri Kalynov, Vladimir Manuilov, Ivan Osharin, Andrey Savilov and Alexander FiksITM Web Conf., 30 (2019) 09001DOI: https://doi.org/10.1051/itmconf/20193009001