2013 Fiscal Year Final Research Report
Study on Broadband Pulsed Surface Wave Oscillator with Double-Corrugation
| Project/Area Number |
23340173
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plasma science
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| Research Institution | Niigata University |
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Principal Investigator |
OGURA Kazuo 新潟大学, 自然科学系, 教授 (40214093)
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| Co-Investigator(Kenkyū-buntansha) |
SUGAWARA Akira 新潟大学, 自然科学系, 准教授 (00270934)
YAMBE Kiyoyuki 新潟大学, 自然科学系, 助教 (90452474)
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| Project Period (FY) |
2011-11-18 – 2014-03-31
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| Keywords | 周期的コルゲート / 表面波 / 高調波 / ミリ波 / テラヘルツ波 / 広帯域 / 電子ビーム / 冷陰極 |
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| Research Abstract |
Broadband pulsed surface wave oscillators with slow-wave structure composed of double-corrugation are examined. The dispersion characteristics of surface wave can be controlled by the corrugation parameters. The surface waves in the range from 20GHz to 40GHz are examined numerically and experimentally. Weakly relativistic electron beams are generated by a disk type cold cathode, not by a hot cathode. By injecting the beam into the double-corrugation, an intense surface wave excitation and a frequency tunability of about 20 percent are demonstrated based on the double-corrugation. And high frequency operation based on the higher order modes of double-corrugation are examined numerically and relatively strong radiations of higher order mode are demonstrated experimentally. Moreover, the intense surface wave excitation is extended up to 170GHz-band. The higher order and extended surface wave operations are of considerable interest for an intense broadband terahertz wave source.
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