Transmission Line for 258 GHz Gyrotron DNP Spectrometry

  • Alexandr A. Bogdashov
  • Vladimir I. Belousov
  • Alexey V. Chirkov
  • Gregory G. Denisov
  • Vyacheslav V. Korchagin
  • Sergey Yu. Kornishin
  • Evgeny M. Tai


We describe the design and test results of the transmission line for liquid-state (LS) and solid-state (SS) DNP spectrometers with the second-harmonic 258.6 GHz gyrotron at the Institute of the Biophysical Chemistry Center of Goethe University (Frankfurt). The 13-meter line includes a mode converter, HE11 waveguides, 4 mitre bends, a variable polarizer-attenuator, directional couplers, a water-flow calorimeter and a mechanical switch. A microwave power of about 15 W was obtained in the pure HE11 mode at the spectrometer inputs.


Microwave transmission line HE11 mode Dynamic nuclear polarization spectrometer Sub-millimetre wavelength gyrotron 



The authors would like to thank Vasil Denisenkov, Alexey Cherepanov (from Goethe University Frankfurt) and Michail Petelin, Vladimir Zapevalov, Alexandr Fix, Dmitry Sobolev, Anton Sedov, Michail Glyavin (from IAP RAS, Nizhny Novgorod) for help and encouraging attitude to the work.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Alexandr A. Bogdashov
    • 1
  • Vladimir I. Belousov
    • 1
  • Alexey V. Chirkov
    • 1
  • Gregory G. Denisov
    • 1
  • Vyacheslav V. Korchagin
    • 1
  • Sergey Yu. Kornishin
    • 1
  • Evgeny M. Tai
    • 2
  1. 1.Institute of Applied PhysicsNizhny NovgorodRussia
  2. 2.GYCOM LtdNyzhny NovgorodRussia

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