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Choi, EunMi
THz Vacuum Electronics and Electrodynamics
Research Interests
  • High power millimeter-wave/THz wave, vacuum electronics, plasma breakdown, electron beams, electromagnetics, microwave/RF engineering

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Efficiency enhancement of a 1.5-MW, 110-GHz gyrotron with a single-stage depressed collector

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Title
Efficiency enhancement of a 1.5-MW, 110-GHz gyrotron with a single-stage depressed collector
Author
Choi, EunMiCerfon, A. J.Mastovsky, I.Shapiro, M. A.Sirigiri, J. R.Temkin, R. J.
Issue Date
2007-08
Publisher
AMER NUCLEAR SOCIETY
Citation
FUSION SCIENCE AND TECHNOLOGY, v.52, no.2, pp.334 - 339
Abstract
We report new experimental results from a 1.5-MW, 110-GHz gyrotron with a single-stage depressed collector. The,gyrotron was operated in the TE22.6 mode with 3-mu s pulse duration. An internal mode converter, which consists of a launcher and four mirrors, has been installed and tested A highly Gaussian-like output beam was observed A single-stage depressed collector has been operated for the study of efficiency enhancement using the same cavity V-2005 as was used in a previous experiment in the axial configuration, in which the output microwave beam propagated through a circular waveguide that also served as a collector. Output power of 1.5 MW, corresponding to 50% efficiency, was measured at 97 kV of beam voltage and 42 A of beam current at 25 kV of collector depression voltage. The results are compared between the axial configuration and the internal mode converter configuration.
URI
https://scholarworks.unist.ac.kr/handle/201301/10880
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=34748867067
ISSN
1536-1055
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