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THz Gyrotron and BWO Designed for Operation in DNP-NMR Spectrometer Magnet

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Abstract

Dynamic nuclear polarization (DNP) in high-field nuclear magnetic resonance (NMR) spectroscopy requires medium-power terahertz radiation, which nowadays can be provided basically by gyrotrons with superconducting magnets. As the electron cyclotron frequency is very close to the frequency of electron paramagnetic resonance for the same magnetic field, under certain conditions the gyrotron can be installed inside the same solenoid used for NMR spectrometer. This eliminates the need for an additional superconducting magnet, results in a shorter terahertz transmission line, and can make DNP systems practical. In addition to an extremely low-voltage gyrotron (“gyrotrino”), we analyze also advantages of strong magnetic field for a slow-wave electron device as an alternative terahertz source.

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Acknowledgements

The reported study was partially supported by RFBR, research projects Nos. 12-02-31722, 13-02-01176.

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Authors and Affiliations

  1. Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia

    V. L. Bratman, A. E. Fedotov, Yu. K. Kalynov & P. B. Makhalov

  2. Nizhny Novgorod State University, Nizhny Novgorod, Russia

    V. L. Bratman

  3. Tallinn University of Technology, Tallinn, Estonia

    A. Samoson

  4. Physics Department, University of Warwick, Coventry, UK

    A. Samoson

Authors
  1. V. L. Bratman
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  2. A. E. Fedotov
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  3. Yu. K. Kalynov
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  4. P. B. Makhalov
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  5. A. Samoson
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Correspondence to A. E. Fedotov.

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Bratman, V.L., Fedotov, A.E., Kalynov, Y.K. et al. THz Gyrotron and BWO Designed for Operation in DNP-NMR Spectrometer Magnet. J Infrared Milli Terahz Waves 34, 837–846 (2013). https://doi.org/10.1007/s10762-013-0024-1

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  • DOI: https://doi.org/10.1007/s10762-013-0024-1

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