Broadband Continuously Frequency Tunable Gyrotron for 600 MHz DNP-NMR Spectroscopy

• IKEDA Ryosuke

  Japan Atomic Energy Agency (JAEA)

• YAMAGUCHI Yuusuke

  Research Center for Development of Far-Infrared Region, University of Fukui (FIR FU)

• TATEMATSU Yoshinori

  Research Center for Development of Far-Infrared Region, University of Fukui (FIR FU)

• IDEHARA Toshitaka

  Research Center for Development of Far-Infrared Region, University of Fukui (FIR FU)

• OGAWA Isamu

  Research Center for Development of Far-Infrared Region, University of Fukui (FIR FU)

• SAITO Teruo

  Research Center for Development of Far-Infrared Region, University of Fukui (FIR FU)

• MATSUKI Yoh

  Institute for Protein Research, Osaka University

• FUJIWARA Toshimichi

  Institute for Protein Research, Osaka University

Abstract

A broadband continuously frequency tunable gyrotron with a triode-type magnetron injection gun was developed as power source for analysis of protein structures. The TE_7,3 oscillation mode was selected to avoid mode competitions in the high magnetic field side. Axial modes of the TE_7,3,−10 were sequentially excited by changing the cavity magnetic field, and frequency tuning of about 4 GHz around 395 GHz was observed with output power greater than 50 W. The frequency also varied about 1GHz as the anode-cathode voltage varied. Thus, the broadest tuning bandwidth in the 400 GHz band gyrotrons was achieved.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 9 (0), 1206058-1206058, 2014

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• gyrotron
• Gyro-BWO
• frequency tuning
• sub-millimeter wave
• dynamic nuclear polarization

Details

• CRID: 1390282680229402752
• NII Article ID: 130005089499
• DOI: 10.1585/pfr.9.1206058
• ISSN: 18806821
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed