Beam Interactions With Surface Waves and Higher Order Modes in Oversized G-band Slow-Wave Structure

Ogura, K.; Shirai, Akihiro; Ogata, Masahiko; Gong, Shaoyan; Yambe, Kiyoyuki

doi:10.1109/tps.2016.2514380

Cited by 11 publications

(3 citation statements)

References 53 publications

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“…The SWO performance including the current dependence may be examined based on the dispersion relation for the beam instability. 13,18,[25][26][27][28][29] The dispersion relations are normally solved numerically assuming a real wavenumber and a complex value of frequency, or vice versa. However, such a conventional way becomes insufficient and ambiguous when practical devices with a finite-length are considered.…”

Section: Discussionmentioning

confidence: 99%

Experimental study on performance change in F-band surface-wave oscillator due to slow-wave structure length

Aoki

Annaka

Ogura

et al. 2021

Jpn. J. Appl. Phys.

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A surface-wave oscillator (SWO) is a high-power terahertz-wave source based on a slow-wave structure (SWS). A cylindrical corrugated waveguide is used as the SWS. The length of SWS is an important factor in the oscillation. Experiments of the SWO with various length structures are conducted. An instability responsible for the SWO changes depending on the SWS length. For the 200-period SWS, the radiation is due to the absolute instability and depends on the beam current like the temporal growth rate. By contrast, for the 80-period SWS, the radiation is due to the global instability having the current dependence like the spatial growth rate. Compared to the 80-period SWS, the 200-period SWS can improve the radiation power more than seven times in the backward wave oscillation (BWO) region. The maximum BWO power reaches up to about 10 kW and the maximum electric efficiency of 1.5% is obtained.

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Section: Discussionmentioning

confidence: 99%

Experimental study on performance change in F-band surface-wave oscillator due to slow-wave structure length

Aoki

Annaka

Ogura

et al. 2021

Jpn. J. Appl. Phys.

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“…These dispersion curves are obtained using numerical methods presented in Refs. [15,16]. For nonaxisymmetric hybrid waveguide modes, the letters of EH and HE are often used.…”

Section: Plasmonic Cavity On Periodic Corrugationmentioning

confidence: 99%

“…10 (c)). Sloid corves in (a) and (b) are respectively the dispersion curves of axisymmetric TM 01 mode and non-axisymmetric HE 11 mode for the axially corrugated waveguide, which are obtained using numerical procedures presented in Refs [15,16]. with the corrugation parameters listed in Table1.…”

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Plasmonic Cavity Formation by Circular and Spiral Corrugations

Ogura

Annaka

KUBO

et al. 2023

Plasma and Fusion Research

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Metal surfaces with sub-wavelength structures form a plasmon polariton-like surface mode, i.e., spoofplasmon. The spoof-plasmon on a corrugated disk propagates radially and is reflected at the edge, resulting in formation of plasmonic cavity. With a concentric circular corrugation, the excited spoof-plasmons form an axisymmetric plasmonic cavity. With a spiral corrugation, the spoof-plasmons have non-zero orbital angular momenta and form a non-axisymmetric plasmonic cavity. Spoof-plasmons consisting of the plasmonic cavity transfer their angular momenta to radiation waves via the corrugated hollow waveguide by conserving their topological charges. c

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Excitation of Surface Flute Waves in Electron Cyclotron Frequency Range by Relativistic Electron Beam Gyrating Along Large Larmor Orbits

Гірка

Thumm

2022

Surface Flute Waves in Plasmas

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Beam Interactions With Surface Waves and Higher Order Modes in Oversized G-band Slow-Wave Structure

Cited by 11 publications

References 53 publications

Experimental study on performance change in F-band surface-wave oscillator due to slow-wave structure length

Experimental study on performance change in F-band surface-wave oscillator due to slow-wave structure length

Plasmonic Cavity Formation by Circular and Spiral Corrugations

Excitation of Surface Flute Waves in Electron Cyclotron Frequency Range by Relativistic Electron Beam Gyrating Along Large Larmor Orbits

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