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Detailed Consideration of Experimental Results of Gyrotron FU CW II Developed as a Radiation Source for DNP-NMR Spectroscopy

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Abstract

A CW gyrotron for the sensitivity enhancement of NMR spectroscopy through dynamic nuclear polarization has been designed. The gyrotron operates at the second harmonic and frequency of 394.6 GHz with the main operating mode TE0,6. Operating conditions of other neighboring cavity modes such as TE2,6 at frequency of 392.6 GHz and TE2,3 at frequency of 200.7 GHz were also considered. The experimental conditions of the gyrotron at low and high voltages are simulated. The output power of 56 watts corresponds to the efficiency of 2 percent at low voltage operation and frequency of 394.6 GHz is expected.

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References

  1. M. Thumm, State-of-the-Art of High Power Gyro-Devices and Free Electron Masers Update 2005, Scientific Report FZKA 7198, Forschungszentrum Karlsruhe, Germany, February 2006.

  2. V. Erckmann, G. Dammertz, D. Dorst, L. Empacher, W. Forster, G. Gantenbein, T. Geist, W. Kasparek, H. P. Laqua, G. A. Muller, M. Thumm, M. Weissgerber, and H. Wobig, ERCH and ECCD with high power gyrotrons at the stellaraors W7-AS and W7X, IEEE Trans. Plasma Sci. 27, 538–546 (1999).

    Article  Google Scholar 

  3. V. L. Granatstein, B. Levush, B. G. Danly, and R. K. Parker, A quarter century of gyrotron research and development, IEEE Trans. Plasma Sci. 25, 1322–1335 (1997).

    Article  Google Scholar 

  4. G. Link, L. Feher, M. Thumm, H.-J. Ritzhaupt-Kleissl, R. Bohme, and A. Weisenberger, Sintering of advanced ceramics using a 30-GHz, 10-kW, CW industrial gyrotron, IEEE Trans. Plasma Sci. 27, 547–556 (1999).

    Article  Google Scholar 

  5. I. Ogawa, K. Yoshisue, H. Ibe, T. Idehara, and K. Kawahata, Long-pulse operation of a submillimeter wave gyrotron and its application to plasma scattering measurement, Rev. Sci. Instrum. 65, 1778–1789 (1994).

    Article  ADS  Google Scholar 

  6. Y. Shimizu, S. Makino, K. Ichikawa, T. Idehara, and I. Ogawa, Development of submillimeter gyrotron for plasma diagnostic, Fusion Eng. Sci. 26, 335–340 (1995).

    Article  Google Scholar 

  7. T. Idehara, S. Mitsudo, M. Ui, I. Ogawa, M. Sato, and K. Kawahata, Development of frequency tunable gyrotrons in millimeter to submillimeter wave range for plasma diagnostics, J. Plasma Fusion Res. Series 3, 407–410 (2000).

    Google Scholar 

  8. T. Tatsukawa, T. Maeda, H. Sasai, T. Idehara, M. Mekata, T. Saito, and T. Kanemaki, ESR spectroscopy with a wide frequency range using a gyrotron as a radiation power source, Int. J. Infrared Millim. Waves 16, 293–305 (1995).

    Article  Google Scholar 

  9. S. Mitsudo, Aripin, T. Matsuda, T. Kanemaki, and T. Idehara, High power, frequency tunable, submillimeter wave ESR device using a gyrotron as a radiation source, Int. J. Infrared Millim. Waves 21, 661–676 (2000).

    Article  Google Scholar 

  10. L. N. Becerra, G. J. Gerven, R. J. Temkin, D. J. Singel, and R. G. Griffin, Dynamic nuclear polarization with a cyclotron resonance maser at 5 T, Phys. Rev. Lett. 71, 3561–3564 (1993).

    Article  ADS  Google Scholar 

  11. V. S. Bajaj, C. T. Farrar, M. K. Hornstein, I. Mastovsky, J. Vieregg, J. Bryant, B. Elena, K. E. Kreischer, R. J. Temkin, and R. G. Griffin, Dynamic nuclear polarization at 9 T using a novel 250 GHz gyrotron microwave source, J. Magn. Reson. 160, 85–90 (2003).

    Article  ADS  Google Scholar 

  12. M. K. Hornstein, V. S. Bajaj, R. G. Griffin, and R. J. Temkin, Continuous-wave operation of a 460-GHz second harmonic gyrotron oscillator, IEEE Trans. Plasma Sci. 34, 524–533 (2006).

    Article  Google Scholar 

  13. G. F. Brand, Development and application of frequency tunable, submillimeter wave gyrotrons, 16(5), 879–887 (1995).

  14. T. Idehara, I. Ogawa, S. Mitsudo, M. Pereyaslavets, N. Nishida, and K. Yoshida, Development of frequency tunable, medium power gyrotrons (Gyrotron FU Series) as submillimeter wave radiation sources, IEEE Trans. Plasma Sci. 27, 340–354 (1999).

    Article  Google Scholar 

  15. 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 Millim. Waves 27, 319 (2006).

    Article  Google Scholar 

  16. T. Idehara, T. Tatsukawa, I. Ogawa, H. Tanabe, T. Mori, S. Wada, G. F. Brand, and M. H. Brennan, Development of a second cyclotron harmonic gyrotron operating at submillimeter wavelength, Phys. Fluids B 4, 267–273 (1991).

    Article  ADS  Google Scholar 

  17. T. Idehara, Y. Iwata, and I. Ogawa, Observation of frequency-domain shift in a submillimeter wave gyrotron, Int. J. Infrared Millim. Waves 24, 119–128 (2003).

    Article  Google Scholar 

  18. N. A. Zavolvsky, G. S. Nusinovich, and A. B. Pavelyev, Stability of single mode oscillations and nonstationay processes in gyrotron with oversized low-quality resonators, in Gyrotrons, edited by A. V. Gaponov-Grekhov (Institute of Applied Physics, Academy of Sciences of the USSR, Gorky, 1989, pp. 84–112). Collection of scientific papers.

  19. La Agusu, T. Idehara, H. Mori, T. Saito, I. Ogawa, and S. Mitsudo, Design of a CW THz gyrotron (Gyrotron FU CW III) using a 20 T superconducting magnet, Int. J. Infrared Millim. Waves 28, 315–328 (2007).

    Article  Google Scholar 

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Acknowledgements

This work was supported by the SETAN project of Japan Science and Technology (JST) for Advanced Measurement and Analysis.

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Authors and Affiliations

  1. Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan

    La Agusu, T. Idehara, I. Ogawa, T. Saito & T. Kanemaki

  2. Institute of Protein Research, Osaka University, 3-2 Yamadaoka, Osaka, Japan

    H. Takahashi & T. Fujiwara

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  1. La Agusu
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  2. T. Idehara
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  3. I. Ogawa
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  4. T. Saito
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  5. T. Kanemaki
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  6. H. Takahashi
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  7. T. Fujiwara
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Correspondence to La Agusu.

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Agusu, L., Idehara, T., Ogawa, I. et al. Detailed Consideration of Experimental Results of Gyrotron FU CW II Developed as a Radiation Source for DNP-NMR Spectroscopy. Int J Infrared Milli Waves 28, 499–511 (2007). https://doi.org/10.1007/s10762-007-9234-8

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  • DOI: https://doi.org/10.1007/s10762-007-9234-8

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