Abstract
Gyrotron FU CW VII, one of the FU CW Series Gyrotrons, has been designed, constructed and completed operational tests successfully in the Research Center for Development of Far Infrared Region, University of Fukui (FIR FU). The gyrotron operates at around 200 GHz for the fundamental cyclotron resonances and at around 400 GHz for the second harmonics. These radiation frequencies will be applied to 300 MHz and 600 MHz DNP enhanced NMR spectroscopy.
Similar content being viewed by others
References
T. Idehara, I. Ogawa, H. Mori, S. Kobayashi, S. Mitsudo, and T. Saito, “A THz gyrotron FU CW III with a 20 T superconducting magnet,” in Proc. 33rd Int. Conf. on Infrared, Millimeter and Terahertz Waves, Pasadena, CA, Sept. 2008, p. 4665652.
T. Idehara, I. Ogawa, L. Agusu, T. Kanemaki, S. Mitsudo, T. Saito, T. Fujiwara, and H. Takahashi, “Development of 394.6 GHz CW gyrotron (gyrotron FU CW II) for DNP/proton-NMR at 600 MHz,” International Journal of Infrared and Millimeter Waves 28, 433–442 (2007).
K. Kreischer, C. Farrar, R. Griffin, R. Temkin, and J. Vieregg, “250 GHz gyrotron for NMR spectroscopy,” in Proc. IEEE 27th Int. Conf. on Plasma Science, New Orleans, LA, Jun. 2000, p. 198.
T. Maly, G. T. Debelouchina, V. S. Bajaj, K.-N. Hu, C.-G. Joo, M. L. Mak-Jurkauskas et al., “Dynamic nuclear polarization at highmagnetic fields,” Journal of Chemical Physics 128, 052211 (2008).
M. K. Hornstein, V. S. Bajaj, R. G. Griffin, K. E. Kreischer, I. Mastovsky, M. A. Shapiro, J. R. Sirigiri, and R. J. Temkin, “Second harmonic operation at 460 GHz and broadband continuous frequency tuning of a gyrotron oscillator,” IEEE Transactions on Electron Devices 52 (5), 798–807 (2005).
M. Silva, S. Alberti, J. -P. Ansermet, K. A. Avramides, G. Bodenhausen, J. -P. Hogge, et al. “Design of a low-power highfrequency gyrotron for DNP-enhanced NMR spectroscopy,” in Proc. IEEE 35th Int. Conf. on Plasma Science, Karlsruhe, Germany, Jun. 2008, p. 4590845.
T. Idehara, J. Goulon, A. Rogalev, and F. Wilhelm, Sub-THz Electron Cyclotron Maser for XDMR on ESRF Beamline ID12, ESRF Internal Report JG XDMR THz rev1, Nov. 2007.
S. Mitsudo, T. Furuya, Y. Shimoyama, T. Fujita, Y. Tatematsu, T. Idehara, et al. Development of the millimeter wave pulsed ESR spectroscopy, Proc. 33rd Int. Conf. on Infrared, Millimeter and Terahertz Waves, Busan, Korea, Sep. 20–25, 2009.
T. Idehara, H. Tsuchiya, O. Watanabe, L. Agusu, and S. Mirsudo, “The first experiment of a THz gyrotron with a pulse magnet,” International Journal of Infrared and Millimeter Waves 27, 319–331 (2006).
M. Y. Glyavin, A. G. Luchinin, and G. Y. Golubiatnikov, “Generation of 1.5-kW, 1-THz Coherent Radiation from a Gyrotron with a pulse magnetic field,” Physical Review Letters 100, 015101 (2008).
T. Idehara, T. Saito, H. Mori, H. Tsuchiya, L. Agusu, and S. Mitsudo, “Long pulse operation of the THz gyrotron with a pulse magnet,” International Journal of Infrared and Millimeter Waves 29, 131–141 (2008).
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 Transactions on Plasma Science 27, 340–354 (1999).
I. Ogawa, T. Idehara, M. Ui, S. Mitsudo, and W. Forster, “Stabilization and modulation of the output power of submillimeter wave gyrotrons,” Fusion Engineering and Design 53, 571–576 (2001).
T. Idehara, I. Ogawa, S. Mitsudo, Y. Iwata, S. Watanobe, Y. Itakura, K. Ohashi, H. Kobayashi, T. Yokoyama, V. Zapevalov, M. Glyavin, A. Kuftin, O. Malygin, and S. Sabchevski, “Development of a high harmonic gyrotron with an axis-encircling electron beam and a permanent magnet,” Vacuum 77, 539–546 (2005).
I. Ogawa, T. Idehara, S. Sabchevski, and W. Kasparek, “Design of a system converting an output radiation of frequency tunable gyrotron into a Gaussian beam,” International Journal of Electronics 87, 1385–1400 (2000).
T. H. Chang, T. Idehara, I. Ogawa, L. Agusu, and S. Kobayashi, “Frequency tunable gyrotron using backward-wave components,” Journal of Applied Physics 105, 063304 (2009).
Acknowledgements
This work was achieved under collaboration between Research Center for Development of Far Infrared Region, University of Fukui (FIR FU) Japan and the NMR Research Group, University of Warwick, UK. It was supported partially by the Special Fund for Education and Research from Ministry of Education, Culture, Sports, Science and Technology (MEXT) in Japan and by a UK EPSRC Basic Technology project grant EP/D045967.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Idehara, T., Kosuga, K., Agusu, L. et al. Gyrotron FU CW VII for 300 MHz and 600 MHz DNP-NMR Spectroscopy. J Infrared Milli Terahz Waves 31, 763–774 (2010). https://doi.org/10.1007/s10762-010-9637-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10762-010-9637-9