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Journal of Electromagnetic Waves and Applications Volume 35, 2021 - Issue 17
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Research Article

Design and simulation of a W-band gyrotron traveling wave amplifier

Shou-Xi Xua Key Laboratory of High Power Microwave Sources and Technologies, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, People’s Republic of ChinaCorrespondence[email protected]
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,
Zhi-Hui Genga Key Laboratory of High Power Microwave Sources and Technologies, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, People’s Republic of ChinaView further author information
,
Wei Gua Key Laboratory of High Power Microwave Sources and Technologies, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, People’s Republic of ChinaView further author information
,
Jie Yanga Key Laboratory of High Power Microwave Sources and Technologies, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, People’s Republic of China;b University of Chinese Academy of Sciences, Beijing, People’s Republic of ChinaView further author information
,
Jian Zhanga Key Laboratory of High Power Microwave Sources and Technologies, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, People’s Republic of ChinaView further author information
&
Rui Zhanga Key Laboratory of High Power Microwave Sources and Technologies, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, People’s Republic of ChinaView further author information
Pages 2384-2395 | Received 17 Oct 2020, Accepted 27 Jun 2021, Published online: 12 Jul 2021
 
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Abstract

The design of a W-band gyrotron traveling wave tube amplifier is presented. The device with a lossy ceramic interaction circuit operates in the fundamental harmonic TE01 circular electric mode. The 70-kV, 6-A electron beam is produced by a double anode magnetron injection gun with an average perpendicular-to-parallel velocity ratio of 1.2 and a parallel velocity spread of less than 3%. The beam-wave interaction is investigated by using a particle-in-cell code. The simulations predict that the amplifier can produce an output peak power of over 100 kW, 28% efficiency, 42 dB gain, and a 3 GHz bandwidth, respectively under the assumption of beam velocity spread 3%.

Acknowledgements

The authors are grateful to all team members in our laboratory due to their continuous support and encouragement.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported in part by the National Natural Science Foundation of China [contract numbers 61571418; 61531002].

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