A high harmonic gyrotron with an axis-encircling electron beam and a permanent magnet

• Material Type: 文書・図像類
• Title: A high harmonic gyrotron with an axis-encircling electron beam and a permanent magnet
• Author/Editor: IDEHARA, Toshitaka; OGAWA, Isamu; MITSUDO, Seitaro; IWATA, Yousuke; WATANABE, Satoru; ITAKURA, Yutaka; OHASHI, Ken; KOBAYASHI, Hideki; YOKOYAMA, Tomonori; ZAPEVALOV, Vladimir E; GLYAVIN, Mikhail Yu; KUFTIN, Andrey N; MALYGIN, Oleg V; SABCHEVSKI, Svilen P
• Author Heading: IDEHARA, Toshitaka; OGAWA, Isamu; MITSUDO, Seitaro; IWATA, Yousuke; WATANABE, Satoru; ITAKURA, Yutaka; OHASHI, Ken; KOBAYASHI, Hideki; YOKOYAMA, Tomonori; ZAPEVALOV, Vladimir E; GLYAVIN, Mikhail Yu; KUFTIN, Andrey N; MALYGIN, Oleg V; SABCHEVSKI, Svilen P
• Publication, Distribution, etc.: IEEE Institute of Electrical and Electronics Engin
• Publication Date: 2004-06
• Publication Date (W3CDTF): 2004-06
• Periodical title: IEEE Transactions on Plasma Science
• No. or year of volume/issue: 32 3
• Volume: 32
• Issue: 3
• Pages: 903-909
• Text Language Code: eng
• Subject Heading: Axis-encircling electron beam; gyrotron; high harmonic; permanent magnet
• Target Audience: 一般
• Note (General): A gyrotron with an axis-encircling electron beam is capable of high-frequency operation, because the high-beam efficiency is kept even at high harmonics of the electron cyclotron frequency. We have designed and constructed such a gyrotron with a permanent magnet. The gyrotron has already operated successfully at the third, fourth, and fifth harmonics. The frequencies are 89.3, 112.7, and 138 GHz, respectively, and the corresponding cavity modes are TE/sub 311/, TE/sub 411/, and TE/sub 511/. The permanent magnet system is quite novel and consists of many magnet elements made of NbFeB and additional coils for controlling the field intensities in the cavity and electron gun regions. The magnetic field in the cavity region can be varied from 0.97 to 1.18 T. At the magnetic field intensities, the output powers at the third and the fourth harmonics are 1.7 and 0.5 kW, respectively. The gyrotron is pulsed, the pulse length is 1 ms and the repetition frequency is 1 Hz. The beam energy is 40 kV and the beam current is 1.2-1.3 A. Beam efficiencies and emission patterns have also been measured. In this paper, the experimental results of the gyrotron are described and compared with computer simulations.
• Access Restrictions: 限定公開
• Rights (production): 〓 2004 Institute of Electrical and Electronics Engin
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 福井大学 : 福井大学学術機関リポジトリ