@article{oai:repo.qst.go.jp:00048582,
 author = {池田, 亮介 and 小田, 靖久 and 小林, 貴之 and 梶原, 健 and 寺門, 正之 and 高橋, 幸司 and 森山, 伸一 and 坂本, 慶司 and 池田 亮介 and 小田 靖久 and 小林 貴之 and 梶原 健 and 寺門 正之 and 高橋 幸司 and 森山 伸一 and 坂本 慶司},
 issue = {5},
 journal = {Journal of infrared, millimeter and terahertz waves},
 month = {Dec},
 note = {A quad-frequency, high-power oscillation having a uniform directional beam was demonstrated using a single gyrotron. A characteristic oscillation mode group composed of TE19,7-TE25,9-TE31,11-TE37,13 modes was selected to achieve uniform directionality for multi-frequency oscillation of RF beams oscillated at 104 GHz, 137 GHz, 170 GHz, and 203 GHz. A triode magnetron injection gun was equipped to obtain optimal oscillation conditions in any oscillation mode. The beams radiated from the output window are propagated towards the very similar direction because the radiated angles for each mode in an internal mode converter are almost coincident. By optimizing the oscillation conditions, high-power operations of 1.2 MW for 170 GHz, 1.0 MW for 104 GHz and 137 GHz in 2 s pulses.  0.9 MW for 203 GHz in 0.3 ms short-pulse and 0.42 MW in 5 s pulse have been achieved.},
 pages = {531--537},
 title = {Multi-Frequency, MW-Power Triode Gyrotron Having a Uniform Directional Beam},
 volume = {38},
 year = {2016}
}