The project of a 2nd harmonic 0.78 THz gyrotron with a coaxial cavity - Glyavin, M.Yu.; Tsvetkov, A.I.; Pagonakis, I.Gr.; Jelonnek, J.; Avramidis, K. A.; Mitsudo, S. (Proceedings of SPIE - The International Society for Optical Engineering, 2020)