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The Development of 460 GHz gyrotrons for 700 MHz DNP-NMR spectroscopy

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Abstract

Two demountable gyrotrons with internal mode converters were developded as sub-THz radiation sources for 700 MHz DNP (Dynamic Nuclear Polarization) enhanced NMR spectroscopy. Experimental study on the DNP-NMR spectroscopy will be carried out in Osaka University, Institute for Protein Research, as a collaboration with FIR UF. Both gyrotrons operate near 460 GHz and the output CW power measured at the end of transmission system made by circular waveguides is typically 20 to 30 watts. One of them named Gyrotron FU CW GVI (we are using “Gyrotron FU CW GO-1” as an official name in Osaka University) is designed to have a special function of high speed frequency modulation δf within 100 MHz band. This will expand excitable band width of ESR and increase the number of electron spins contributing to DNP. The other gyrotron, Gyrotron FU CW GVIA (“Gyrotron FU CW GO-II”) has a function of frequency tunability Δf in the range of wider than 1.5 GHz, which is achieved in steady state by changing magnetic field intensity. This function should be used for adjusting the output frequency at the optimal value to achieve the highest enhancement factor of DNP.

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References

  1. M. Thumm, State-of-the-Art of High Power Gyro-Devices and Free Electron Masers, KIT Scientific Reports 7662 (2013).

    Google Scholar 

  2. S.E. Spira-Hakkarainen, K.E. Kreischer, R.J. Temkin, Submillimeter-wave harmonic gyrotron experiment, IEEE Trans. Plasma Science, PS-18, 334-342 (1990).

    Article  Google Scholar 

  3. T. Idehara, T. Tatsukawa, I. Ogawa, H. Tanabe, T. Mori, S. Wada and T. Kanemaki, Development of a second cyclotron harmonic gyrotron operating at 0.8 mm wavelength, Appl. Phys. Letts. 56, 1743-1745 (1990).

    Article  Google Scholar 

  4. V.A. Flyagin, A.G. Luchinin, G.S. Nusinovich, Submillimeter wave gyrotrons theory and experiment, Int. J. Infrared and Millimeter Waves 4, 629-637 (1983).

    Article  Google Scholar 

  5. G.F. Brand, P.W. Fekete, K. Hong, K.J. Moore and T. Idehara, Operation of a tunable gyrotron at the second harmonic of the electron cyclotron frequency, Int. J. Electronics 68, 1099-1111 (1990).

    Article  Google Scholar 

  6. M. Thumm, Progress on gyrotrons for ITER and future thermonuclear fusion reactor, IEEE Trans. On Plasma Science 39, 971-979 (2011).

    Article  Google Scholar 

  7. T. Idehara, S.P. Sabchevski, Development and applications of high-frequency gyrotrons in FIR FU covering the sub-THz to THz range, J. Infrared, Millimeter and Terahertz Waves 33 667-694 (2012).

    Article  Google Scholar 

  8. V.S. Bajaj, C.T. Farrar, M.K. Hornstein, I. Mostovsky, J. Vieregg, J. Bryant, B. Elena, K.E. Kreischer, R.J. Temkin, R.G. Griffin, Dynamic nuclear polarization at 9 T using anovel 250 GHz gyrotron microwave source, J. Magnetic Resonance 160, 85-90 (2003).

    Article  Google Scholar 

  9. Yoh Matsuki, Keisuke Ueda, Toshitaka Idehara, Ryosuke Ikeda, Isamu Ogawa, Shinji Nakamura, Mitsuru Toda, Takahiro Anai, Toshimichi Fujiwara, Helium-cooling and -spinning dynamic nuclear polarization for sensitivity-enhanced solid-state NMR at 14 T and 30 K, Journal of Magnetic Resonance 225, 1-9 (2012).

    Article  Google Scholar 

  10. Kevin J. Pike, Thomas F. Kemp, Hiroki Takahashi, Robert Day, Andrew P. Howes, Eugeny V. Kryukov, James F. MacDonald, Alana E.C. Collis, David R. Bolton, Richard J. Wylde, Marcella Orwick, Kosuke Kosuga, Andrew J. Clark, Toshitaka Idehara, Anthony Watts, Graham M. Smith, Mark E. Newton, Ray Dupree, Mark E. Smith, A spectrometer designed for 6.7 and 14.1 T DNP-enhanced solid-state MAS NMR using quasi-optical microwave transmission, Journal of Magnetic Resonance 215, 1-9 (2012).

  11. S. Alberti, J. Ph. Ansermet, F. Braunmuller, P. Cuanillon, J. Dubray, D. Fasel, J. Ph. Hogge, A. Macor, E. de Rijk, M.Q. Tran, T.M. Tran, Q. Vuillemin, Experimental results on a modular gyrotron operating at 0.26 THz for 400 MHz DNP/NMR spectroscopy application, 38th Int. Conf. on Infrared. Millimeter and Terahertz Waves (IRMMW-THz 2012), Wollongong, Australia, Sept 23-28, 2012, Thu-A-3.

  12. T. Yamazaki, A. Miyazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, I. Ogawa, T. Idehara, S. Sabchevski. Ditect observation of the hyperfine transition of ground-state positronium, Phys. Rev. Letts. 108, 253401-5 (2012).

    Article  Google Scholar 

  13. I. Ogawa, M. Iwata, T, Idehara, K. Kawahata, H. Iguchi, A. Ejiri, Plasma Scattering Measurement using a submillimeter wave gyrotron (Gyrotron FU II) as a power source, FusionEngineering and Design, 34-35, 455-458 (1997).

  14. T. Tatsukawa, T. Maeda, H. Sasai, T. Idehara, M. Mekata, T. Saito and T. Kanemaki, ESR spectrometer with a wide frequency range using a gyrotron as aradiation power source, Int. J. Infrared Millimeter Waves 16, 293-305 (1995).

    Article  Google Scholar 

  15. A. Rogalev, J. Goulon, G. Goujon, F. Wilhelm, I. Ogawa and T. Idehara, X-ray detected magnetic resonance at sub-THz frequencies using a high power gyrotron, J. Infrared, Millimeter and Terahertz Waves 33, 777-793 (2012).

    Article  Google Scholar 

  16. Y. Bykov, A.F.L. Goldenberg, V. A. Flyagin, The possibilities of material processing by intense millimeter-wave radiation, Mat. Res. Soc. Symp. Proc., 169, 41-42 (1991).

    Google Scholar 

  17. T. Kikunaga, H. Asano, Y. Yasojima, F. Sato, T. Tsukamoto, A 28 GHz gyrotron with a permanent magnet system, Int. J. Electronics, 79, 655-663 (1995).

    Article  Google Scholar 

  18. T. Idehara, H. Tsuchiya, O. Watanabe, La Agusu and S.Mitsudo, The first experiment of a THz gyrotron with a pulse magnet, Int. J. Infrared and Millimeter Waves 27, 319-331 (2006).

  19. M. Yu. Glyavin, A.G. Luchinin, G. Yu. Golubiatnikov, Generation of 1.5-kW, 1 THz coherent radiation from a gyrotron with a pulsed magnetic field, Phys. Rev. Letts. 100, 015101-1~015102-3 (2008).

  20. O. Watanabe, H. Tsuchiya, H. Mori, La Agusu, S. Mitsudo, I. Ogawa, T. Saito, T. Idehara, Development of a Tera Hertz Gyrotron as a Radiation Source, Plasma and Fusion Research: Rapid Communications 2, 024 (2007).

    Article  Google Scholar 

  21. T. Idehara, T. Tatsukawa, I. Ogawa, Y. Shimizu, N. Nishida and K. Yoshida, Development and applications of submillimeter wave gyrotrons, Proc. 3rd Int. Workshop on Strong Micrawaves in Plasmas, Nizhny Novgorod, 1997, Vol.2, 634-659.

  22. N. Miyoshi, N. Ito, I. Ogawa and T. Idehara, Combination treatment of hyperthermia and photodynamic for experimental tumor model using gyrotron (107, 203 GHz), Proc. 35th Int. Conf. on Infrared, Millimeter and Terahertz Waves, Italy, Th-P.11 (2010).

  23. S. P. Sabchevski, T. Idehara, S. Ishiyama, N. Miyoshi, T. Tatsukawa, A dual-beam irradiation facility for novel hybrid cancer therapy, J. Infrared, Millimeter and Terahertz Waves 34, 71-87 (2013).

    Article  Google Scholar 

  24. R. Ikeda, Y. Yamaguchi, Y. Tatematsu, T. Idehara, I. Ogawa, T. Saito, Y. Matsuki, T. Fujiwara, Broadband continuously frequency tunable gyrotron for 600 MHz DNP-NMR spectroscopy, Plasma and Fusion Research 9, 1206058 (2014).

    Google Scholar 

  25. Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Ozeki, R. Ikeda, T. Kanemaki, I. Ogawa and T. Saito, Development of a kW Level-200 GHz Gyrotron FU CW GI with a Internal Quasi -Optical Mode Convertor, J. Infrared, Millimeter and Terahertz Waves 33, 292-305 (2012).

    Article  Google Scholar 

  26. Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Kawase, I. Ogawa, T. Saito and T. Fujiwara, Characteristics of the mode converter of Gyrotron FU CW GII radiating Gaussian beams in both the fundamental and second harmonic frequency band, J. Infrared, Millimeter and Terahertz Waves, 35, 517-524 (2014).

    Article  Google Scholar 

  27. Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. K. Kawase, R. Ichioka, I. Ogawa, T. Saito and T. Fujiwara, Development of second harmonic gyrotrons, Gyrotron FU CW GII and Gyrotron FU CW GIII, equipped with internal mode converter, J. Infrared, Millimeter and Terahertz Waves, 35, 169-178 (2014).

    Article  Google Scholar 

  28. Y. Tatematsu, Y. Yamaguchi, T. Kawase, R. Ichioka, I. Ogawa, T. Saito and T. Idehara, Analysis of oscillation characteristics and optimal condition for high power operation on Gyrotron FU CW GIII, Physics of Plasmas 21, 083113-1~6 (2014).

    Google Scholar 

  29. O. Dumbrajs, T. Idehara, T. Saito and Y. Tatematsu, Calculations of Starting Currents and Frequencies in Frequency-Tunable Gyrotrons, Japanese Journal of Applied Physics 51, (2012) 126601.

    Article  Google Scholar 

  30. T. Idehara, M. Pereyaslavets, N. Nishida, K. Yoshida and I. Ogawa, Frequency modulation in a submillimeter-wave gyrotron, Phys. Rev. Letts. 81, 1973-1976 (1998).

    Article  Google Scholar 

  31. A. Miyazaki, T. Yamazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, T. Idehara, I. Ogawa and Y. Tatematsu, The Direct Spectroscopy of Positronium Hyperfine Structure Using a Sub-THz Gyrotron, J. Infrared, Millimeter and Terahertz Waves, 35, 91-100 (2014).

    Article  Google Scholar 

  32. T.H. Chang, T. Idehara, I. Ogawa, L. Agusu and S. Kobayashi, Frequency tunable gyrotron using backward-wave components, J. Applied Physics 105, 063304-1~4 (2009).

  33. T. Idehara, A. Kuleshov, K. Ueda and E. Khutoryan, Power-stabilization of high frequency gyrotrons using a double PID feedback control for applications to high power THz spectroscopy, J. Infrared, Millimeter and Terahertz Waves 35, 159-168 (2014).

    Article  Google Scholar 

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Acknowledgements

This work was partially supported by Grant in Aid for Scientific Research (B) (No. 25630142) from Japan Society for Promotion of Science (JSPS) and SENTAN project of JST. This work was performed under the Cooperative Research Program of Institute for Protein Research, Osaka University.

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Authors and Affiliations

  1. Research Center for Development of Far-Infrared Region, University of Fukui (FIR UF), Bunkyo 3-9-1, Fukui-shi, Fukui-ken, 910-8507, Japan

    T. Idehara, Y. Tatematsu, Y. Yamaguchi, E. M. Khutoryan & A. N. Kuleshov

  2. Gyro Tech Co. Ltd., Keya 3-2-4, Fukui-shi, Fukui-ken, 918-8550, Japan

    T. Idehara

  3. O. Ya. Usikov Institute for Radiophysics and Electronics IRE NASU, 12,ac. Proskura str., Kharkiv, 61085, Ukraine

    E. M. Khutoryan & A. N. Kuleshov

  4. Institute for Protein Research, Osaka University, Yamada-oka 3-2, Suita-shi, Osaka-fu, 565-0871, Japan

    A. N. Kuleshov, K. Ueda, Y. Matsuki & T. Fujiwara

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  1. T. Idehara
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  2. Y. Tatematsu
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  8. T. Fujiwara
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Correspondence to T. Idehara.

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Idehara, T., Tatematsu, Y., Yamaguchi, Y. et al. The Development of 460 GHz gyrotrons for 700 MHz DNP-NMR spectroscopy. J Infrared Milli Terahz Waves 36, 613–627 (2015). https://doi.org/10.1007/s10762-015-0150-z

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  • DOI: https://doi.org/10.1007/s10762-015-0150-z

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