Plasma-wave interaction in helicon plasmas near the lower hybrid frequency Articles uri icon

publication date

  • July 2022

start page

  • 1

end page

  • 7

issue

  • 31

volume

  • 2022

International Standard Serial Number (ISSN)

  • 1674-1056

Electronic International Standard Serial Number (EISSN)

  • 2058-3834

abstract

  • We study the characteristics of plasma-wave interaction in helicon plasmas near the lower hybrid frequency. The (0D)
    dispersion relation is derived to analyze the properties of the wave propagation and a 1D cylindrical plasma-wave interaction
    model is established to investigate the power deposition and to implement the parametric analysis. It is concluded that the
    lower hybrid resonance is the main mechanism of the power deposition in helicon plasmas when the RF frequency is near
    the lower hybrid frequency and the power deposition mainly concentrates on a very thin layer near the boundary. Therefore,
    it causes that the plasma resistance has a large local peak near the lower hybrid frequency and the variation of the plasma
    density and the parallel wavenumber lead to the frequency shifting of the local peaks. It is found that the magnetic field is
    still proportional to the plasma density for the local maximum plasma resistance and the slope changes due to the transition.

subjects

  • Physics

keywords

  • helicon plasmas; lower hybrid frequency; power deposition