Various types of echelette resonators for gyrotrons V.E. Zapevalov, S.N. Vlasov, E.V. Koposova, A.N. Kuftin, A.B. Paveliev and N.A. Zavolsky EPJ Web Conf., 195 (2018) 01022 Published online: 23 November 2018 DOI: 10.1051/epjconf/201819501022