Glyavin, M.Y., et al., Terahertz gyrotrons: State of the art and prospects. J. Commun. Technol. Electron., 2014. 59(8): p. 792-797.
http://dx.doi.org/10.1134/S1064226914080075
The state of the art for terahertz gyrotrons that are needed for various scientific research and practical applications is presented. Powers of 5 kW and 200 kW are obtained at frequencies of 1 and 0.7 THz using pulsed gyrotrons with pulse durations of tens of microseconds. A power of 100 W is demonstrated for cw gyrotrons at frequencies ranging from 0.2 to 0.5 THz.