Dielectrics for output windows of medium power gyrotronsEvgeny Serov, V.V. Parshin, S.V. Egorov, A.N. Konovalov, A.I. Makarov and K.V. VlasovaEPJ Web Conf., 195 (2018) 06014DOI: https://doi.org/10.1051/epjconf/201819506014