TY JOUR TI Terahertz generator - spherotron KW spherotron KW monotron KW efficiency KW non-synchronous interaction KW high power KW two-spherical resonator JO Infocommunications and Radio Technologies AU Kurayev, A.A. AU Matveyenka, V.. PY 2018 IS 1 PB Federal State Educational Institution of Higher Education Sevastopol State University