A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam

Abstract High power vacuum electronic devices of millimeter wave to terahertz regime are attracting extensive interests due to their potential applications in science and technologies. In this paper, the design and experimental results of a powerful compact oversized surface wave oscillator (SWO) in...

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Autores principales: Jianguo Wang, Guangqiang Wang, Dongyang Wang, Shuang Li, Peng Zeng
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Lenguaje:EN
Publicado: Nature Portfolio 2018
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Acceso en línea:https://doaj.org/article/661b1bc0afb542a2a2cd5958399ff86a
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spelling oai:doaj.org-article:661b1bc0afb542a2a2cd5958399ff86a2021-12-02T11:40:46ZA megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam10.1038/s41598-018-25466-w2045-2322https://doaj.org/article/661b1bc0afb542a2a2cd5958399ff86a2018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25466-whttps://doaj.org/toc/2045-2322Abstract High power vacuum electronic devices of millimeter wave to terahertz regime are attracting extensive interests due to their potential applications in science and technologies. In this paper, the design and experimental results of a powerful compact oversized surface wave oscillator (SWO) in Y-band are presented. The cylindrical slow wave structure (SWS) with rectangular corrugations and large diameter about 6.8 times the radiation wavelength is proposed to support the surface wave interacting with annular relativistic electron beam. By choosing appropriate beam parameters, the beam-wave interaction takes place near the π-point of TM01 mode dispersion curve, giving high coupling impedance and temporal growth rate compared with higher TM0n modes. The fundamental mode operation of the device is verified by the particle-in-cell (PIC) simulation results, which also indicate its capability of tens of megawatts power output in the Y-band. Finally, a compact experimental setup is completed to validate our design. Measurement results show that a terahertz pulse with frequency in the range of 0.319–0.349 THz, duration of about 2 ns and radiation power of about 2.1 MW has been generated.Jianguo WangGuangqiang WangDongyang WangShuang LiPeng ZengNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Jianguo Wang
Guangqiang Wang
Dongyang Wang
Shuang Li
Peng Zeng
A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam
description Abstract High power vacuum electronic devices of millimeter wave to terahertz regime are attracting extensive interests due to their potential applications in science and technologies. In this paper, the design and experimental results of a powerful compact oversized surface wave oscillator (SWO) in Y-band are presented. The cylindrical slow wave structure (SWS) with rectangular corrugations and large diameter about 6.8 times the radiation wavelength is proposed to support the surface wave interacting with annular relativistic electron beam. By choosing appropriate beam parameters, the beam-wave interaction takes place near the π-point of TM01 mode dispersion curve, giving high coupling impedance and temporal growth rate compared with higher TM0n modes. The fundamental mode operation of the device is verified by the particle-in-cell (PIC) simulation results, which also indicate its capability of tens of megawatts power output in the Y-band. Finally, a compact experimental setup is completed to validate our design. Measurement results show that a terahertz pulse with frequency in the range of 0.319–0.349 THz, duration of about 2 ns and radiation power of about 2.1 MW has been generated.
format article
author Jianguo Wang
Guangqiang Wang
Dongyang Wang
Shuang Li
Peng Zeng
author_facet Jianguo Wang
Guangqiang Wang
Dongyang Wang
Shuang Li
Peng Zeng
author_sort Jianguo Wang
title A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam
title_short A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam
title_full A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam
title_fullStr A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam
title_full_unstemmed A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam
title_sort megawatt-level surface wave oscillator in y-band with large oversized structure driven by annular relativistic electron beam
publisher Nature Portfolio
publishDate 2018
url https://doaj.org/article/661b1bc0afb542a2a2cd5958399ff86a
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