Oscillation-Starting Conditions for Oversized $G$ -Band (140–220 GHz) Backward Wave Oscillator Driven by Weakly Relativistic Electron Beam

Autor:	Kiyoyuki Yambe, Shintaro Nomizu, Kohji Okada, Sakuji Kobayashi, Kosuke Yamazaki, Akihiro Shirai, Shaoyan Gong, Shin Kubo, Takashi Shimozuma, Kazuo Ogura
Rok vydání:	2015
Předmět:	Physics Nuclear and High Energy Physics Terahertz radiation G band Surface wave Oscillation Relativistic electron beam Backward-wave oscillator Atomic physics Condensed Matter Physics Cutoff frequency Beam (structure) Computational physics
Zdroj:	IEEE Transactions on Plasma Science. 43:3530-3536
ISSN:	1939-9375 0093-3813
Popis:	An oversized $G$ -band backward wave oscillator (BWO) driven by a weakly relativistic electron beam less than 100 kV is studied. Rectangular corrugations are used as the slow-wave structure (SWS), which have surface waves with upper cutoff frequencies of above 150 GHz [ $G$ -band (140–220 GHz)]. In this paper, we examine the starting conditions for intense $G$ -band BWO operation by varying the beam parameters and SWS lengths. It is shown that a starting energy exists for the $G$ -band BWO and that the starting energy is more critical than the starting current in the oversized BWO. Above the starting energy, very intense output powers on the order of 10 kW are obtained. The oscillation-starting condition for such intense operation may play an important role in high-intensity terahertz wave sources.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c9ca8eb338d308119c7188f38a12d139 https://doi.org/10.1109/tps.2015.2424993 Zobrazit plný text záznamu