Gyrotron

Gyrotrons are microwave sources whose operation is based on the stimulated cyclotron radiation of electrons oscillating in a static magnetic field. Gyrotron devices are now able to generate several orders of magnitude as much power at millimeter wavelength as classical microwave tubes, and can operate at frequencies higher than are conveniently available from other types of tubes. Gyrotron oscillators can have a wide application, including technological processes, atmospheric sensing, ozone conservation, artificial ionospheric mirror, extra-high resolution electron spin resonance spectroscopy, nuclear magnetic resonance spectroscopy, new medical technology spectroscopy, etc. However, the main application of powerful gyrotrons is electron cyclotron resonance plasma heating in tokamaks and stellarators and the noninductive current drive in tokamaks.

References:

  1. O.Dumbrajs, and T. Idehara, Hysteresis in Mode Competition in High Power 170 GHz Gyrotron for ITER - International Journal of Infrared and Millimeter Waves, 2008, 29, p. 232-239
  2. O. Dumbrajs, Y. Kominis, and G. S. Nusinovich, Electron dynamics in the process of mode switching in gyrotrons - Phys. Plasmas, 2009, 16, 013102
  3. O. Dumbrajs, and G. S. Nusinovich, To the theory of high-power gyrotrons with uptapered resonators - Phys. Plasmas, 2010, 17, 053104