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Conceptual Design Study of a Novel Gyrotron for NMR/DNP Spectroscopy

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Abstract

In this paper we present some initial results from a conceptual design study focused on the development of a novel frequency tunable gyrotron for nuclear magnetic resonance (NMR) spectroscopy with signal enhancement based on the utilization of high field radiation and dynamic nuclear polarization (DNP) technique. The first variants of both the electron optical system and the resonant cavity which have been designed aiming continuous frequency tunability in a broad frequency band are presented and discussed. The selected method for frequency tunability is based on the excitation of higher order axial modes and smooth transition between them. It was selected after a critical examination of the known theoretical and practical results related to the frequency control in gyrotrons. It is believed that the current conceptual design is an appropriate basis for development of the next (optimized) design which will include also a detailed design of other components (mode converter, output window etc.) and magnetic circuit (superconducting magnet and supplementary solenoids) as well as for the overall mechanical design and fabrication of the prospective gyrotron.

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Authors and Affiliations

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

    S. Sabchevski & T. Idehara

  2. Cryogenic Laboratory, Faculty of Engineering, University of Fukui, 910, Fukui, Japan

    S. Mitsudo

  3. Institute for Protein Research, Osaka University, Osaka, Japan

    T. Fujiwara

Authors
  1. S. Sabchevski
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  2. T. Idehara
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  3. S. Mitsudo
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  4. T. Fujiwara
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Sabchevski, S., Idehara, T., Mitsudo, S. et al. Conceptual Design Study of a Novel Gyrotron for NMR/DNP Spectroscopy. Int J Infrared Milli Waves 26, 1241–1264 (2005). https://doi.org/10.1007/s10762-005-7601-x

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  • DOI: https://doi.org/10.1007/s10762-005-7601-x

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