Hannover 2016 – scientific programme

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P: Fachverband Plasmaphysik

P 12: Poster Session: Magnetic Confinement

P 12.2: Poster

Tuesday, March 1, 2016, 16:30–19:00, Empore Lichthof

Trapping of Electron Bernstein Waves in a inhomogeneous magnetic field of the plasma experiment FLiPS — •Rumiantsev Kirill, Holzhauer Eberhard, Köhn Alf, and Kasparek Walter — Institut für Grenzflächenverfahrenstechnik und Plasmatechnologie, Universität Stuttgart

Heating and diagnostics by Electron Bernstein Waves (EBW) is an important topic in fusion research. EBW are purely kinetic waves and appear in the treatment of plasma waves only when thermal effects are properly included. The absence of the high-density cutoff and the strong absorption at the cyclotron resonance harmonics make EBW a good candidate for plasma heating. It has been shown theoretically that inhomogeneities in the magnetic field can trap EBW within a narrow space creating a wave channel similar to a waveguide. The dedicated experiments are planned to be done at a linear device FLiPS. Its flexible magnetic field is well suited for fundamental studies. The investigation is relevant for fusion research due to FLiPS's dimensionless plasma parameters that are similar to those that are found in the edge of fusion plasmas.

The trapping has been investigated using ray-tracing and full-wave simulations for various magnetic field configurations. The consequences of the effect for heating and diagnostics are being discussed. Preliminary experimental results will be shown.