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<p>We simulated an electron-optical system, based on a thermionic cathode, capable of forming a helical electron beam with an electron energy of 500 keV, a current of 200 A, and a pitch factor of 1.3 at a guiding magnetic field of up to 5.6 T. The optimization of the gyrotron cavity profile with an operating frequency of 90.6 GHz was carried out, and the possibility of achieving a generation efficiency of up to 34% was demonstrated. Using three-dimensional particle-in-cell simulations, we studied oscillation build-up at the leading edge of the accelerating voltage pulse and confirmed the possibility of achieving efficient single-mode generation.</p>

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On the Possibilities for Increasing the Power of a W-Band Relativistic Gyrotron Using an Electron-Optical System with a Thermionic Cathode

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • A. N. Leontyev,
  • O. P. Plankin,
  • R. M. Rozental,
  • E. S. Semenov,
  • A. S. Zuev

摘要

We simulated an electron-optical system, based on a thermionic cathode, capable of forming a helical electron beam with an electron energy of 500 keV, a current of 200 A, and a pitch factor of 1.3 at a guiding magnetic field of up to 5.6 T. The optimization of the gyrotron cavity profile with an operating frequency of 90.6 GHz was carried out, and the possibility of achieving a generation efficiency of up to 34% was demonstrated. Using three-dimensional particle-in-cell simulations, we studied oscillation build-up at the leading edge of the accelerating voltage pulse and confirmed the possibility of achieving efficient single-mode generation.