Helicon mode formation and radio frequency power deposition in a helicon-produced plasma

K. Niemi, M. Kraemer

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Time- and space-resolved magnetic (B-dot) probe measurements in combination with measurements of the plasma parameters were carried out to investigate the relationship between the formation and propagation of helicon modes and the radio frequency (rf) power deposition in the core of a helicon plasma. The Poynting flux and the absorbed power density are deduced from the measured rf magnetic field distribution in amplitude and phase. Special attention is devoted to the helicon absorption under linear and nonlinear conditions. The present investigations are attached to recent observations in which the nonlinear nature of the helicon wave absorption has been demonstrated by showing that the strong absorption of helicon waves is correlated with parametric excitation of electrostatic fluctuations. (C) 2008 American Institute of Physics.

Original languageEnglish
Article number073503
Pages (from-to)-
Number of pages11
JournalPhysics of Plasmas
Issue number7
Publication statusPublished - Jul 2008

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