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A cusp electron gun for millimeter wave gyrodevices

Donaldson, C. R. and He, W. and Cross, A.W. and Li, Fengping and Phelps, A.D.R. and Zhang, Liang and Ronald, Kevin and Robertson, Craig and Whyte, Colin and Young, Alan (2010) A cusp electron gun for millimeter wave gyrodevices. Applied Physics Letters, 96 (14). ISSN 0003-6951

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The experimental results of a thermionic cusp electron gun, to drive millimeter and submillimeter wave harmonic gyrodevices, are reported in this paper. Using a "smooth" magnetic field reversal formed by two coils this gun generated an annular-shaped, axis-encircling electron beam with 1.5 A current, and an adjustable velocity ratio alpha of up to 1.56 at a beam voltage of 40 kV. The beam cross-sectional shape and transported beam current were measured by a witness plate technique and Faraday cup, respectively. These measured results were found to be in excellent agreement with the simulated results using the three-dimensional code MAGIC.

Item type: Article
ID code: 26572
Keywords: electron guns, gyrotrons, millimetre wave devices, submillimetre wave devices, Physics, Physics and Astronomy (miscellaneous)
Subjects: Science > Physics
Department: Faculty of Science > Physics
Depositing user: Miss Leonie Airley
Date Deposited: 03 Aug 2010 15:53
Last modified: 13 Sep 2015 21:41
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