Development of the Multifrequency Gyrotron FU CW GV with Gaussian Beam Output

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• 作者：Yoshinori Tatematsu ; Yuusuke Yamaguchi…
• 关键词：Gyrotron ; Multifrequency operation ; Gaussian beam ; Mode converter ; Double ; disk window ; High ; power radiation source
• 刊名：International Journal of Infrared and Millimeter Waves
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：36
• 期：8
• 页码：697-708
• 全文大小：1,878 KB
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• 作者单位：Yoshinori Tatematsu (1)
  Yuusuke Yamaguchi (1)
  Ryoichi Ichioka (1)
  Masaki Kotera (1)
  Teruo Saito (1)
  Toshitaka Idehara (1)
  
  1. Research Center for Development of Far-Infrared Region, University of Fukui, Fukui, 910-8507, Japan
  
• 刊物类别：Physics and Astronomy
• 刊物主题：None Assigned
• 出版者：Springer New York
• ISSN：1866-6906

文摘

Gyrotron FU CW GV has been developed as a multifrequency gyrotron for operation over the frequency range from 162 to 265?GHz at frequencies separated by steps of approximately 10?GHz. The oscillation modes were selected; the radii of the caustic surfaces for the electromagnetic waves of the modes had similar values in the waveguide, and it was therefore expected that these modes would be converted into Gaussian beams by a mode converter. In reality, more than ten modes oscillated and the Gaussian-like beams were radiated. A double-disk window with variable spacing maintains the transmittance through the window at a high level over a wide range of frequencies. Using this window, output powers of more than 1?kW were observed for almost all the expected modes.