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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Auteurs principaux:	Jianguo Wang, Guangqiang Wang, Dongyang Wang, Shuang Li, Peng Zeng
Format:	article
Langue:	EN
Publié:	Nature Portfolio 2018
Sujets:	Medicine R Science Q
Accès en ligne:	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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A megawatt-level surface wave oscillator in Y-band with large oversized structure driven by annular relativistic electron beam

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