Excitation of helicons by current antennas
- Authors: Gospodchikov E.D.1, Timofeev A.V.2
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Affiliations:
- Institute of Applied Physics
- National Research Center “Kurchatov Institute”
- Issue: Vol 43, No 6 (2017)
- Pages: 638-647
- Section: Oscillations and Waves in Plasma
- URL: https://journals.rcsi.science/1063-780X/article/view/186094
- DOI: https://doi.org/10.1134/S1063780X17060071
- ID: 186094
Cite item
Abstract
Depending on the angle θ between the wave vector and the magnetic field, helicons are conventionally divided into two branches: proper helicons (H mode), propagating at small θ, and Trivelpiece–Gould waves (TG mode), propagating at large θ. The latter are close to potential waves and have a significant electric component along the external magnetic field. It is believed that it is these waves that provide electron heating in helicon discharges. There is also commonly believed that current antennas, widely used to ignite helicon discharges, excite essentially nonpotential Н modes, which then transform into TG modes due to plasma inhomogeneity. In this work, it is demonstrated that electromagnetic energy can also be efficiently introduced in plasma by means of TG modes.
About the authors
E. D. Gospodchikov
Institute of Applied Physics
Author for correspondence.
Email: egos@appl.sci-nnov.ru
Russian Federation, Nizhny Novgorod, 603950
A. V. Timofeev
National Research Center “Kurchatov Institute”
Email: egos@appl.sci-nnov.ru
Russian Federation, Moscow, 123182