Broadband terahertz-power extracting by using electron cyclotron maser

Abstract Terahertz applications urgently require high performance and room temperature terahertz sources. The gyrotron based on the principle of electron cyclotron maser is able to generate watt-to-megawatt level terahertz radiation, and becomes an exceptional role in the frontiers of energy, securi...

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Autores principales:	Shi Pan, Chao-Hai Du, Xiang-Bo Qi, Pu-Kun Liu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7dbe39bb39254acfaf03e9272e78c415
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spelling	oai:doaj.org-article:7dbe39bb39254acfaf03e9272e78c4152021-12-02T15:05:12ZBroadband terahertz-power extracting by using electron cyclotron maser10.1038/s41598-017-07545-62045-2322https://doaj.org/article/7dbe39bb39254acfaf03e9272e78c4152017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07545-6https://doaj.org/toc/2045-2322Abstract Terahertz applications urgently require high performance and room temperature terahertz sources. The gyrotron based on the principle of electron cyclotron maser is able to generate watt-to-megawatt level terahertz radiation, and becomes an exceptional role in the frontiers of energy, security and biomedicine. However, in normal conditions, a terahertz gyrotron could generate terahertz radiation with high efficiency on a single frequency or with low efficiency in a relatively narrow tuning band. Here a frequency tuning scheme for the terahertz gyrotron utilizing sequentially switching among several whispering-gallery modes is proposed to reach high performance with broadband, coherence and high power simultaneously. Such mode-switching gyrotron has the potential of generating broadband radiation with 100-GHz-level bandwidth. Even wider bandwidth is limited by the frequency-dependent effective electrical length of the cavity. Preliminary investigation applies a pre-bunched circuit to the single-mode wide-band tuning. Then, more broadband sweeping is produced by mode switching in great-range magnetic tuning. The effect of mode competition, as well as critical engineering techniques on frequency tuning is discussed to confirm the feasibility for the case close to reality. This multi-mode-switching scheme could make gyrotron a promising device towards bridging the so-called terahertz gap.Shi PanChao-Hai DuXiang-Bo QiPu-Kun LiuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shi Pan Chao-Hai Du Xiang-Bo Qi Pu-Kun Liu Broadband terahertz-power extracting by using electron cyclotron maser
description	Abstract Terahertz applications urgently require high performance and room temperature terahertz sources. The gyrotron based on the principle of electron cyclotron maser is able to generate watt-to-megawatt level terahertz radiation, and becomes an exceptional role in the frontiers of energy, security and biomedicine. However, in normal conditions, a terahertz gyrotron could generate terahertz radiation with high efficiency on a single frequency or with low efficiency in a relatively narrow tuning band. Here a frequency tuning scheme for the terahertz gyrotron utilizing sequentially switching among several whispering-gallery modes is proposed to reach high performance with broadband, coherence and high power simultaneously. Such mode-switching gyrotron has the potential of generating broadband radiation with 100-GHz-level bandwidth. Even wider bandwidth is limited by the frequency-dependent effective electrical length of the cavity. Preliminary investigation applies a pre-bunched circuit to the single-mode wide-band tuning. Then, more broadband sweeping is produced by mode switching in great-range magnetic tuning. The effect of mode competition, as well as critical engineering techniques on frequency tuning is discussed to confirm the feasibility for the case close to reality. This multi-mode-switching scheme could make gyrotron a promising device towards bridging the so-called terahertz gap.
format	article
author	Shi Pan Chao-Hai Du Xiang-Bo Qi Pu-Kun Liu
author_facet	Shi Pan Chao-Hai Du Xiang-Bo Qi Pu-Kun Liu
author_sort	Shi Pan
title	Broadband terahertz-power extracting by using electron cyclotron maser
title_short	Broadband terahertz-power extracting by using electron cyclotron maser
title_full	Broadband terahertz-power extracting by using electron cyclotron maser
title_fullStr	Broadband terahertz-power extracting by using electron cyclotron maser
title_full_unstemmed	Broadband terahertz-power extracting by using electron cyclotron maser
title_sort	broadband terahertz-power extracting by using electron cyclotron maser
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7dbe39bb39254acfaf03e9272e78c415
work_keys_str_mv	AT shipan broadbandterahertzpowerextractingbyusingelectroncyclotronmaser AT chaohaidu broadbandterahertzpowerextractingbyusingelectroncyclotronmaser AT xiangboqi broadbandterahertzpowerextractingbyusingelectroncyclotronmaser AT pukunliu broadbandterahertzpowerextractingbyusingelectroncyclotronmaser
_version_	1718388900232167424

Broadband terahertz-power extracting by using electron cyclotron maser

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