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

Material type: 文書・図像類

Author: IDEHARA, Tほか

Publisher: Elsevier Ltd

Publication date: 2005-03

Material Format: Digital

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Note (General)：: A gyrotron with an axis-encircling electron beam is useful for high frequency operation, because the high beam efficiency is kept even at high harmoni...

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Material Type: 文書・図像類
Title: Development of a high harmonic gyrotron with an axis-encircling electron beam and a permanent magnet
Author/Editor: IDEHARA, T
OGAWA, I
MITSUDO, S
IWATA, Y
WATANABE, S
ITAKURA, Y
OHASHI, K
KOBAYASHI, T
YOKOYAMA, T
ZAPEVALOV, V
GLYAVIN, M
KUFTIN, A
MALYGIN, O
SABCHEVSKI, S
Author Heading: IDEHARA, T
OGAWA, I
MITSUDO, S
IWATA, Y
WATANABE, S
ITAKURA, Y
OHASHI, K
KOBAYASHI, T
YOKOYAMA, T
ZAPEVALOV, V
GLYAVIN, M
KUFTIN, A
MALYGIN, O
SABCHEVSKI, S
Publication, Distribution, etc.: Elsevier Ltd
Publication Date: 2005-03
Publication Date (W3CDTF): 2005-03
Periodical title: Vacuum - Surface Engineering Surface Instrumentation and Vacuum Technology
No. or year of volume/issue: 77 4
Volume: 77
Issue: 4
Pages: 539-546
ISSN (Periodical Title): ISSN : 0042-207X
Text Language Code: eng
Subject Heading: High harmonic gyrotron
Permanent magnet
Axis-encircling electron beam
Target Audience: 一般
Note (General): A gyrotron with an axis-encircling electron beam is useful for high frequency operation, because the high beam efficiency is kept even at high harmonic of electron–cyclotron resonance. We have designed and constructed such a gyrotron with a permanent magnet. The gyrotron has already succeeded in operation at the third harmonic and the fourth harmonic resonances. The operation frequencies are 89.3 and 112.7 GHz, respectively. Operation cavity modes are TE311 and TE411. The permanent magnet system consists of many magnet elements made of NbFeB and additional coils for controlling the field intensities in cavity and electron gun regions. The magnetic field at the cavity region can be varied from 0.97 to 1.18 T. At the optimum condition of the magnetic field intensity, the output power at the third harmonic operation is 2.5 kW. The operation is pulsed, the pulse length is 1 ms and the repetition frequency is 1 Hz. The beam energy and current are 40 kV and 1.2 or 1.3 A. Starting current, beam efficiency and emission pattern also have been measured. In this paper, the operation results of
Access Restrictions: 限定公開
Related Material (DOI): 10.1016/j.vacuum.2004.09.022
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