Musyoki, StephenYokoo, KuniyoshiSato, NabuyiOno, Shoichi2015-05-202015-05-201990-02International Journal of Electronics Volume 69, Issue 6, 1990http://www.tandfonline.com/doi/abs/10.1080/00207219008920369http://hdl.handle.net/123456789/964High efficiency operation of an auto-resonant peniotron amplifier operating with a down tapered DC magnetic field is discussed and the basic design concepts for a 200 GHz experimental prototype tube are described.enpeniotronArticle