Coupling of Helicon Antennas to Plasma Near the Electron Cyclotron Resonance

  • V. F. Virko Institute for Nuclear Research, Nat. Acad. of Sci. of Ukraine
  • V. M. Slobodyan Institute for Nuclear Research, Nat. Acad. of Sci. of Ukraine
  • Yu. V. Virko Institute for Nuclear Research, Nat. Acad. of Sci. of Ukraine
Keywords: helicon discharge, electron-cyclotron resonance, inductive antenna

Abstract

Two inductive antennas, which are usually used for the excitation of a helicon discharge on the wave azimuthal modes m = 1 and m = 0, demonstrate unexpectedly different properties near the electron-cyclotron frequency wce. Though the alternating inductive electric field E produced by the antenna m = 1 is mainly parallel to the external steady magnetic field B0, nevertheless the absorption resonance at the frequency wce accompanied by an increase in the plasma density, takes place. For the m = 0 antenna, where these fields are mutually transverse and where the cyclotron resonance seems certainly must be present, it is absent. But the electron-cyclotron resonance (ECR) appears again provided the B0 field is turned up by the right angle around the same m = 0 antenna.

References

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Published
2019-01-04
How to Cite
Virko, V., Slobodyan, V., & Virko, Y. (2019). Coupling of Helicon Antennas to Plasma Near the Electron Cyclotron Resonance. Ukrainian Journal of Physics, 61(11), 956. https://doi.org/10.15407/ujpe61.11.0956
Section
Plasmas and gases