Two-dimensional plasma-wave interaction in an helicon plasma thruster with magnetic nozzle Articles uri icon

publication date

  • November 2018

issue

  • 11

volume

  • 27

international standard serial number (ISSN)

  • 0963-0252

electronic international standard serial number (EISSN)

  • 1361-6595

abstract

  • An axisymmetric, finite difference frequency domain model is used to study the wave propagation and power absorption in a helicon plasma thruster operating inside a laboratory vacuum chamber. The magnetic field is not purely axial and the plasma beam is cylindrical in the source and divergent in the magnetic nozzle. The influence of the magnetic field strength, plasma density, electron collision frequency and geometry on the wavefields and the power absorption maps is investigated, showing different power deposition patterns. The electromagnetic radiation is not confined to the source region but propagates into the nozzle divergent region, and indeed the power absorption there is not negligible. For the impedance at the antenna, the reactance is rather constant but the resistance is very dependent on operation parameters; optimal parameter values maximizing the resistance are found.

keywords

  • electric space propulsion; helicon plasma thruster; plasma-wave interaction;
    helicon waves; wave heating