Advertisement

Further Characterization of 394-GHz Gyrotron FU CW GII with Additional PID Control System for 600-MHz DNP-SSNMR Spectroscopy

  • Keisuke Ueda
  • Yoh Matsuki
  • Toshimichi Fujiwara
  • Yoshinori Tatematsu
  • Isamu Ogawa
  • Toshitaka Idehara
Article

Abstract

A 394-GHz gyrotron, FU CW GII, has been designed at the University of Fukui, Japan, for dynamic nuclear polarization (DNP)-enhanced solid-state nuclear magnetic resonance (SSNMR) experiments at 600-MHz 1H resonant frequency. After installation at the Institute for Protein Research (IPR), Osaka University, Japan, a PID feedback control system was equipped to regulate the electron gun heater current for stabilization of the electron beam current, which ultimately achieved stabilization of output power when operating in continuous wave (CW) mode. During exploration to further optimize operating conditions, a continuous tuning bandwidth of approximately 1 GHz was observed by varying the operating voltage at a fixed magnetic field. In the frequency range required for positive DNP enhancement, the output power was improved by increasing the magnetic field and the operating voltage from their initial operational settings. In addition, fine tuning of output frequency by varying the cavity cooling water temperature was demonstrated. These operating conditions and ancillary enhancements are expected to contribute to further enhancement of SSNMR signal.

Keywords

Gyrotron DNP Solid-state NMR PID control Frequency tunability 

Notes

Acknowledgments

This work was partially supported by the SENTAN project of JST, Grant in Aid for Scientific Research (B) (no. 24360134) from the Japan Society for Promotion of Science (JSPS), and the Targeted Proteins Research Program of MEXT.

We are grateful to Dr. Alexei Kuleshov and Dr. Eduard Khutoryan from O. Ya. Usikov Institute of Radio Physics and Electronics, National Academic of Science Ukraine, for the discussion about PID control.

We would like to thank M. Tomohiro Kanemaki from the Research Center for Development of Far-Infrared Region, University of Fukui, for helping during the fabrication of the components.

We would also like to thank our colleague Dr. Kris Frost for the English language review.

References

  1. 1.
    S.-T. Han, R. G. Griffin, K.-N. Hu, C.-G. Joo, C. Joye, J. R. Sirigiri, R. J. Temkin, A. Torrezan, and P. Woskov, IEEE Trans Plasma Sci IEEE Nucl Plasma Sci Soc, 35, 559 (2007)CrossRefGoogle Scholar
  2. 2.
    V. S. Bajaj, M. Hornstein, K. Kreischer, J. Sirigiri, P. Woskov, M. Mak-Jurkauskas, J. Herzfeld, R. Temkin, and R. Griffin, J Magn Reson, 189, 251 (2007)CrossRefGoogle Scholar
  3. 3.
    C. Torrezan, M. A. Shapiro, J. R. Sirigiri, R. J. Temkin, and R. G. Griffin, IEEE Trans Electron Devices, 58, 2777 (2011)CrossRefGoogle Scholar
  4. 4.
    C. Torrezan, S.-T. Han, I. Mastovsky, M. A. Shapiro, J. R. Sirigiri, R. J. Temkin, A. Barnes, and R. Griffin, IEEE Trans Plasma Sci IEEE Nucl Plasma Sci Soc, 38, 1150 (2010)CrossRefGoogle Scholar
  5. 5.
    S.K. Jawla, W.C. Guss, M. A. Shapiro, and R. J. Temkin, IRMMW-THz, (2014) doi: 10.1109/IRMMW-THz.2014.6956164.Google Scholar
  6. 6.
    T. Idehara, I. Ogawa, L. Agusu, T. Kanemaki, S. Mitsudo, T. Saito, T. Fujiwara, and H. Takahashi, Int J Infrared Milli Waves, 28, 433 (2007)CrossRefGoogle Scholar
  7. 7.
    L. Agusu, T. Idehara, I. Ogawa, T. Saito, T. Kanemaki, H. Takahashi, and T. Fujiwara, Int J Infrared Milli Waves, 28, 499 (2007)CrossRefGoogle Scholar
  8. 8.
    T. Idehara, T. Saito, I. Ogawa, S. Mitsudo, Y. Tatematsu, L. Agusu, H. Mori, and S. Kobayashi, Appl Magn Reson, 34, 265 (2008)CrossRefGoogle Scholar
  9. 9.
    Y. Matsuki, H. Takahashi, K. Ueda, T. Idehara, I. Ogawa, M. Toda, H. Akutsu, and T. Fujiwara, Phys Chem Chem Phys, 12, 5799 (2010)CrossRefGoogle Scholar
  10. 10.
    T. Idehara, K. Kosuga, L. Agusu, R. Ikeda, I. Ogawa, T. Saito, Y. Matsuki, K. Ueda, and T. Fujiwara, J Infrared Milli Terahz Waves, 31, 775 (2010)CrossRefGoogle Scholar
  11. 11.
    Y. Matsuki, K. Ueda, T. Idehara, R. Ikeda, K. Kosuga, I. Ogawa, S. Nakamura, M. Toda, T. Anai, and T. Fujiwara, J Infrared Milli Terahz Waves, 33, 745 (2012)CrossRefGoogle Scholar
  12. 12.
    Y. Matsuki, K. Ueda, T. Idehara, R. Ikeda, I. Ogawa, S. Nakamura, M. Toda, T. Anai, and T. Fujiwara, J Magn Reson, 225, 1 (2012)CrossRefGoogle Scholar
  13. 13.
    Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Kawase, R. Ichioka, I. Ogawa, T. Saito, and T. Fujiwara, J Infrared Milli Terahz Waves, 35, 169 (2014)CrossRefGoogle Scholar
  14. 14.
    Y. Tatematsu, Y. Yamaguchi, T. Idehara, T. Kawase, I. Ogawa, T. Saito, and T. Fujiwara, J Infrared Milli Terahz Waves, 35, 517 (2014)CrossRefGoogle Scholar
  15. 15.
    T. Idehara, Y. Tatematsu, Y. Yamaguchi, E. M. Khutoryan, A. N. Kuleshov, K. Ueda, Y. Matsuki, and T. Fujiwara, J Infrared Milli Terahz Waves, 36, 613 (2015)CrossRefGoogle Scholar
  16. 16.
    T. Idehara, E. M. Khutoryan, Y. Tatematsu, Y. Yamaguchi, A. N. Kuleshov, O. Dumbrajs, Y. Matsuki, and T. Fujiwara, J Infrared Milli Terahz Waves, 36, 819 (2015)CrossRefGoogle Scholar
  17. 17.
    A. Watts, Nat Rev Drug Discov, 4, 555 (2005)CrossRefGoogle Scholar
  18. 18.
    R. Tycko, Q Rev of Biophys, 39, 1 (2006)CrossRefGoogle Scholar
  19. 19.
    S. Ashbrook, D. Dawson, and V. Seymour, Phys Chem Chem Phys, 16, 8223 (2014).CrossRefGoogle Scholar
  20. 20.
    A. Abragam and M. Goldman, Reports on Progress in Physics, 41, 395 (1978)CrossRefGoogle Scholar
  21. 21.
    K.-N. Hu, G. Debelouchina, A. Smith, and R. Griffin, J Chem Phys, 134, 125105 (2011)CrossRefGoogle Scholar
  22. 22.
    C. Song, K.-N. Hu, C.-G. G. Joo, T. M. Swager, and R. G. Griffin, J Am Chem Soc 128, 11385 (2006)CrossRefGoogle Scholar
  23. 23.
    T. Idehara, A. N. Kuleshov, K. Ueda, and E. M. Khutoryan, J Infrared Milli Terahz Waves, 35, 159 (2014)CrossRefGoogle Scholar
  24. 24.
    E. M. Khutoryan, T. Idehara, A. N. Kuleshov, and K. Ueda, J Infrared Milli Terahz Waves, 35, 1018 (2014)CrossRefGoogle Scholar
  25. 25.
    S. E. Tsimring, Int J Infrared Milli Waves, 22, 1433 (2001)CrossRefGoogle Scholar
  26. 26.
    T. Idehara, Y. Iwata, and I. Ogawa, Int J Infrared Milli Waves, 24, 119 (2003)CrossRefGoogle Scholar
  27. 27.
    T. Hori, T. Idehara, H. Sasagawa, A. Kimura, I. Ogawa, and S. Mitsudo, Rev Sci Instrum 76, 023502 (2005)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Keisuke Ueda
    • 1
  • Yoh Matsuki
    • 1
  • Toshimichi Fujiwara
    • 1
  • Yoshinori Tatematsu
    • 2
  • Isamu Ogawa
    • 2
  • Toshitaka Idehara
    • 2
  1. 1.Institute for Protein Research (IPR)Osaka UniversitySuita-shiJapan
  2. 2.Research Center for Development of Far-Infrared RegionUniversity of Fukui (FIR UF)Fukui-shiJapan

Personalised recommendations