Plasma and Fusion Research

Volume 13, 3406107 (2018)

Regular Articles

Experimental Study on Backward Wave Oscillators Using Dielectric Discharge Cold Cathodes
Masamichi SAKAGAMI, Akira SUGAWARA, Takeru OTSUKI, Yuta ANNAKA, Min Thu SAN, Kiyoyuki YAMBE, Kazuo OGURA and Wonsop KIM1)
Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan
1)
Department of New & Renewable Energy Electrical Engineering, Jeonnam Provincial College, Korea
(Received 21 December 2017 / Accepted 7 August 2018 / Published 25 September 2018)

Abstract

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.

Keywords

electron beam, cold cathode, microwave generation, weakly relativistic region, backward wave oscillator, π-point operation

DOI: 10.1585/pfr.13.3406107

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