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Theoretical Study on the 1.185-THz Third Harmonic Gyrotron

  • O. DumbrajsEmail author
  • T. Idehara
Article
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Abstract

We discuss how the existing University of Fukui (FIR UF) second harmonic double-beam gyrotron with the operating frequency 0.79 THz can be adopted for operation at the third harmonic. The new gyrotron will operate at the frequency 1.185 THz and will significantly increase the frequency of the dynamic nuclear polarization-nuclear magnetic resonance (DNP-NMR) spectrometer. This will allow one to study new bio-molecules.A special attention is payed to the mode competition between the operating \( {TE}_{3,11}^{+} \) mode at the third harmonic and the parasitic modes at the second and fundamental harmonics. The operating parameters of the modified gyrotron are U = 20 kV, α = 1.3, I = 0.35 A, and B = 14.60 T and the expected output power about \( 100\mathrm{W} \).

Keywords

Gyrotron Higher harmonics DNP NMR 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  1. 1.The Institute of Solid State PhysicsUniversity of LatviaRigaLatvia
  2. 2.Research Center for Development of Far-Infrared RegionUniversity of Fukui (FIR UF)Fukui-shiJapan

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