Study on Operation of a Surface-Wave Oscillator Around the $\pi$ -Point Region

San, Min Thu; Ogura, K.; Yambe, Kiyoyuki; Annaka, Yuta; Fujita, Junpei

doi:10.1109/tps.2016.2633550

Cited by 12 publications

(8 citation statements)

References 30 publications

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“…Therefore, the microwave is observed in some special cases. One notable point is that the period of the SWS is short 20 periods [7]. Reflection is large at the edge of the SWS; however, the microwave has transverse direction at the edge and hence, leaks from the SWS [7].…”

Section: Microwave Generationmentioning

confidence: 99%

“…One notable point is that the period of the SWS is short 20 periods [7]. Reflection is large at the edge of the SWS; however, the microwave has transverse direction at the edge and hence, leaks from the SWS [7]. A part of the leaked microwave on the cathode side is reflected by the cathode and emitted from the output window.…”

Section: Microwave Generationmentioning

confidence: 99%

“…The π-point operation of the SWS occurs when a short-period SWS (20 periods) is used. D. Li et al [6] and Min Thu San et al [7] demonstrated this phenomenon both theoretically and experimentally, respectively. In this study, the occurrence of microwave oscillations at the π-point, i.e., the operation of the BWO around 30 keV is investigated.…”

Section: Introductionmentioning

confidence: 98%

“…For high-power microwave generation, π-point operation is important [6,7]. The group velocity near the π-point is low, and the interaction between the electron beam and a corrugated slow-wave structure (SWS) is strong.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental Study on Backward Wave Oscillators Using Dielectric Discharge Cold Cathodes

Sakagami

Sugawara

Otsuki

et al. 2018

Plasma and Fusion Research

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Herein, we investigated the characteristics of a backward wave oscillator using a dielectric discharge cold cathode (DDCC) in a weakly relativistic region with energies less than 100 keV. The DDCC comprises a copper disc electrode and a ceramic tube; the DDCC exhibited a circular burn pattern with a voltage less than about 30 kV. When a Marx generator was used as a high-voltage source, two microwave oscillations (first phase and second phase) were observed. Within 80 periods of the slow-wave structure, we observed microwave oscillation at the π-point with a voltage of about 30 kV and then detected a microwave signal of about 910-5500 mW.

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Section: Microwave Generationmentioning

confidence: 99%

Section: Microwave Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study on Backward Wave Oscillators Using Dielectric Discharge Cold Cathodes

Sakagami

Sugawara

Otsuki

et al. 2018

Plasma and Fusion Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…These devices are based on a periodic structure in which the kinetic energy of an electron beam is converted into electromagnetic (EM) wave energy. The surface-wave oscillator (SWO) is a slow-wave device utilizing a cylindrical corrugated waveguide [2][3][4][5]. This corrugated waveguide has two axisymmetric normal modes: transverse magnetic (TM) and transverse electric (TE).…”

Section: Introductionmentioning

confidence: 99%

Non-Axisymmetric Radiation from Surface-Wave Oscillator Driven by Weakly Relativistic Electron Beam

Annaka

Ogura

Ozawa

et al. 2019

Plasma and Fusion Research

Self Cite

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In this paper, non-axisymmetric radiation from a W-band surface wave oscillator (SWO) is observed. The SWO is based on a cylindrical corrugated waveguide with a periodic structure on its inner wall. This SWO is driven by electron beams with energy of less than 100 keV and a current on the order of 100 A. The waveguide has transverse magnetic (TM) and transverse electric (TE) modes as its axisymmetric normal modes. Nonaxisymmetric modes also appear as a hybrid of TM and TE modes and form surface waves near the periodic structure. The frequencies of the non-axisymmetric modes increase as the azimuthal mode number m increases. By injecting an annular electron beam into the SWO, many non-axisymmetric modes with m up to 30 are excited and intense radiation is generated at frequenies up to 140 GHz.

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A Study of the Influence of the Beam and Field Parameters on the Terahertz Multiwave Cherenkov Generator Efficiency

Chazov,

Deichuly,

Koshelev

et al. 2024

Russ Phys J

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Study on Operation of a Surface-Wave Oscillator Around the $\pi$ -Point Region

Cited by 12 publications

References 30 publications

Experimental Study on Backward Wave Oscillators Using Dielectric Discharge Cold Cathodes

Experimental Study on Backward Wave Oscillators Using Dielectric Discharge Cold Cathodes

Non-Axisymmetric Radiation from Surface-Wave Oscillator Driven by Weakly Relativistic Electron Beam

A Study of the Influence of the Beam and Field Parameters on the Terahertz Multiwave Cherenkov Generator Efficiency

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