Development of frequency tunable sub-THz gyrotrons for application to sensitivity enhancement of NMR spectroscopy

• Project/Area Number: 24360134
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: University of Fukui
• Principal Investigator: IDEHARA Toshitaka 福井大学, 遠赤外領域開発研究センター, 特任教授 (80020197)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000); Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000); Fiscal Year 2013: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000); Fiscal Year 2012: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
• Keywords: DNP-NMR 分光 / ジャイロトロン / サブテラヘルツ / 世界最高周波数 / ESR 分光 / NMR 分光 / 700 MHz DNP-NMR / 周波数変調 / 周波数安定化 / 周波数可変 / 核磁気共鳴 / 感度向上 / DNP-NMR / 高感度NMR

Outline of Final Research Achievements

By irradiation of high power sub-THz radiation on the sample, we can transfer the polarization of electron spins to nuclear spins and as the result, enhance the sensitivity of NMR spectroscopy by higher than 1000 times for application to analysis of complicated protein molecule. For such objectives, we have developed two 460GHz gyrotrons with following functions; frequency tunability, high power of 100W and long term continuous stable operation during longer than ten hours.
We have installed these two gyrotrons on 700 MHz NMR spectrometer at Osaka University, Institute of Protein Research for DNP-NMR experiment and succeeded in the highest frequency DNP-NMR spectroscopy.

Research Products

• [Journal Article] The Development of 460 GHz gyrotrons for 700 MHz DNP-NMR spectroscopy (2015)
  • Author(s): T.Idehara, Y.Tatematsu, Y. Yamaguchi, E. M. Khutoryan, A. N. Kuleshov, K. Ueda, Y. Matsuki, T. Fujiwara
  • Journal Title: Journal of Infrared, Millimeter, and Terahertz Waves Volume: In press Issue: 7 Pages: 000-000
  • DOI: 10.1007/s10762-015-0150-z
  • Peer Reviewed
• [Journal Article] Gyrotron Output Power Stabilization by PID Feedback Control of Heater Current and Anode Voltage (2014)
  • Author(s): E.M. Khutoryan, T.Idehara, A.N. Kuleshov, K. Ueda
  • Journal Title: Journal of Infrared, Millimeter, and Terahertz Waves Volume: 35 Pages: 1018-1029
• [Journal Article] Broadband Continuously Frequency Tunable Gyrotron for 600 MHz DNP-NMR Spectroscopy (2014)
  • Author(s): R. Ikeda, Y. Yamaguchi, Y. Tatematsu, T. Idehara, I. Ogawa, T. Saito, Y. Matsuki and T. Fujiwara
  • Journal Title: Plasma and Fusion Research: Rapid Communication Volume: 9
  • NAID: 130005089499
• [Journal Article] Power stabilization of high frequency gyrotron using a double PID feedback control for applications to high power THz spectroscopy (2014)
  • Author(s): T. Idehara, A. Kuleshov, K. Ueda, E. Khutoryan
  • Journal Title: Journal of Infrared, Millimeter and Terahertz Waves Volume: 36 Pages: 159-168
  • Peer Reviewed
• [Journal Article] The Direct Spectroscopy of Positronium Hyperfine Structure Using a Sub-THz Gyrotron (2013)
  • Author(s): Akira Miyazaki, Toshitaka Idehara, 他
  • Journal Title: Journal of Infrared, Millimeter and Terahertz Waves Volume: 35 Pages: 91-100
  • Peer Reviewed
• [Journal Article] Application of continuously fiequency-tunable 0.4 THz gyrotron to dynamicnuclear polarization for 600 MHz solid-state NMR (2012)
  • Author(s): Yoh Matsuki, K. Ueda, T, Idehara,
  • Journal Title: J. Infrared, Millimeter and Terahertz Waves Volume: 33 Pages: 743-755
  • Peer Reviewed
• [Journal Article] Development a compact sub-THz gyrotron FU cw CI for application to high power THz technologies (2012)
  • Author(s): T. Idehara, J. C. Mudiganti,
  • Journal Title: J. Infrared, Millimeter and Terahertz Waves Volume: 332012 Pages: 724-744
  • Peer Reviewed
• [Journal Article] Development of DNP-enhanced high-resolution solid-state NMR system for the characterization of the surface structure of polimer mateial (2012)
  • Author(s): F. Horii, T. Idehara, Y. Fujii
  • Journal Title: J. Infrared, Millimeter and Terahertz Waves Volume: 33 Pages: 756-765
  • Peer Reviewed
• [Presentation] Sub-THz Gyrotrons With Special Functions of Frequency Control for Applications to DNP-NMR Spectroscopy (2014)
  • Author(s): T.Idehara, Y.Tatematsu, Y.Yamaguchi, E.Khutoryan, A.Kuleshov, K.Ueda, Y.Matsuki, T.Fujiwara
  • Organizer: 39th International Conference on Infrared, Millimeter and Terahertz Waves
  • Place of Presentation: Tucson, USA
  • Year and Date: 2014-09-14 – 2014-09-19
• [Presentation] Corrugated Transmission Line Systems for 395GHz/600MHz and 460 GHz/700 MHz DNP-NMR Spectroscopy (2014)
  • Author(s): J. Sirigiri, T.Maly, N.Tarricone, J. Zhou, T.Idehara, Y.Matsuki, T.Fujiwara
  • Organizer: 39th International Conference on Infrared, Millimeter and Terahertz Waves
  • Place of Presentation: Tucson, USA
  • Year and Date: 2014-09-14 – 2014-09-19
• [Presentation] Applications of high frequency gyrotrons to high power THz spectroscopy (2014)
  • Author(s): T.Idehara, Y.Tatematsu, S.Mitsudo, I.Ogawa, T.Saito, K. Ueda, Y. Matsuki, T. Fujiwara, A. Miyazaki, T. Suehara, T. Yamazaki
  • Organizer: 9th International Workshop on Strong Microwaves and Terahertz Waves: Sources and Applications
  • Place of Presentation: N. Novgorod, Russia
  • Year and Date: 2014-07-24 – 2014-07-30
  • Invited
• [Presentation] Development of a High Power 300 GHz Band Gyrotron for Collective Thomson Scattering Diagnostics in LHD (2014)
  • Author(s): T.Saito, Y.Yamaguchi, Y.Tatematsu, J.Kasa, M.Kotera, T.Idehara, S.Kubo, T.Shimozuma, K.Tanaka, M.Nishiura
  • Organizer: 9th International Workshop on Strong Microwaves and Terahertz Waves: Sources and Applications,
  • Place of Presentation: N. Novgorod, Russia
  • Year and Date: 2014-07-24 – 2014-07-30
  • Invited
• [Presentation] Optimization of opration of the gyrotron FU CW GO-II for DNP NMR spectroscopy (2014)
  • Author(s): O. Dumbrajs, T.Idehara, G.S. Nusinovich, Y.Tatematsu
  • Organizer: 9th International Workshop on Strong Microwaves and Terahertz Waves: Sources and Applications
  • Place of Presentation: N. Novgorod, Russia
  • Year and Date: 2014-07-24 – 2014-07-30
• [Presentation] Development of Gyrotron FU CW series for applications to high power THz spectroscopy (2014)
  • Author(s): T. Idehara, Y. Tatematsu 他
  • Organizer: The 5th International Workshop on Far Infrared Technology
  • Place of Presentation: Fukui, Japan
• [Presentation] 460 GHz Second harmonic gyrotrons for 700 MHz DNP-NMR spectroscopy (2013)
  • Author(s): T. Idehara, Y. Tatematsu 他
  • Organizer: 38th Int. Conf. on Infrared Millimeter and Terahertz Waves
  • Place of Presentation: Mainz, Germany
  • Invited
• [Presentation] Development of high power THz technologies opened by gyrotrons (2012)
  • Author(s): T.Idehara
  • Organizer: The Second International Conference "Terahertz and Microwaves" TERA 2012
  • Place of Presentation: モスクワ州立大学
  • Year and Date: 2012-06-22
• [Remarks] 福井大学遠赤外領域開発研究センター(FIR FU)
  • URL: http://fir.u-fukui.ac.jp/