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Title: A 220/247.5/275-GHz, 1.0-MW, Triple Frequency Regime Gyrotron
Authors: Baghel G.S.
Kartikeyan M.V.
Thumm M.K.
Published in: IEEE Transactions on Electron Devices
Abstract: In this paper, a complete design methodology of a triple frequency gyrotron is presented, which can also be further applied to multifrequency operations. Frequencies for operation are selected as 220, 247.5, and 275 GHz for the localized and intense heating of magnetically confined plasmas (i.e., electron cyclotron heating and current drive) for future fusion reactors. A cautious selection procedure of the mode triplet is portrayed in accordance with the all possible physical and technical constraints. Typical cold cavity (beam absent) and single-mode (beam present) calculations are performed and presented with extended interaction structure (including an optimized nonlinear taper section). A triode type configuration is adopted for magnetron injection gun to produce the electron beam with desired characteristics as required for RF behavior. Time-dependent multimode calculations are presented with nonuniform magnetic field and beam parameters optimized by gun simulations. These rigorous calculations affirm proper working of the design with ≈1-MW continuous wave power for chosen mode triplet and efficiency ≈35%. © 2017 IEEE.
Citation: IEEE Transactions on Electron Devices (2017), 64(4): 1774-1780
Issue Date: 2017
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: Nonlinear taper (NLT)
nonuniform magnetic field (NUMF)
single mode (beam present) calculation
time-dependent multimode calculation
triode type magnetron injection gun (MIG)
Triple regime gyrotron
ISSN: 189383
Author Scopus IDs: 55270387900
Author Affiliations: Baghel, G.S., Department of Electronics and Communication Engineering, IIT Roorkee, Roorkee, 247667, India
Kartikeyan, M.V., Department of Electronics and Communication Engineering, IIT Roorkee, Roorkee, 247667, India
Thumm, M.K., Institut für Hochfrequenztechnik-und Mikrowellentechnik, Karlsruhe Institute of Technology, Karlsruhe, 76344, Germany
Appears in Collections:Journal Publications [ECE]

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