Parametric decay instabilities in the HELIX helicon plasma source

Kline, J. L.; Scime, E. E.

doi:10.1063/1.1528182

Parametric decay instabilities in the HELIX helicon plasma source

Journal Article · Tue Dec 31 23:00:00 EST 2002 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.1528182· OSTI ID:811148

Kline, J. L.; Scime, E. E.

Parametric decay of the electromagnetic helicon pump wave into two electrostatic waves, thought to be a lower hybrid wave and an ion acoustic wave, is observed. The parametric excitation of the electrostatic waves is strongest near the axis of the helicon source. The parametrically excited wave amplitudes can be as large as 8% of the pump wave amplitude. Thus, efficient coupling between the parametrically excited waves and plasma particles (ions and electrons) can lead to enhanced plasma densities, electron temperatures, and ion temperatures. A correlation between the lower hybrid wave and electron temperatures and a correlation between the ion acoustic wave and ion temperatures near the antenna are observed.

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-36

OSTI ID:: 811148

Report Number(s):: LA-UR-02-4814

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 10; ISSN 1070-664X

Country of Publication:: United States

Language:: English

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