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Non-linear coupling of the lower hybrid grill in ASDEX

V.A. Petržilka, F. Leuterer, F.-X. Söldner, L. Giannone, R. Schubert1991年被引用 45Nuclear FusionIF 3出版社

Computations of the reflection coefficient based on a non-linear lower hybrid (LH) coupling theory are presented and compared with the measurements of the reflection coefficient of the ASDEX tokamak LH grill, where powers up to 4 kW/cm2 have been launched. This high LH power density modifies the electron density in front of the grill because of ponderomotive forces. Thus, the coupling and the power reflection coefficient change. To explain the observed saturation of the growth of the reflection coefficient with power, it is necessary to take into account some heating of the plasma in front of the grill by the transmitted LH power, which also leads to a poloidally inhomogeneous edge electron density.

日本語訳

非線形低混成(LH)結合理論に基づく反射係数の計算結果を提示し、ASDEXトカマクLHグリルにおける反射係数の測定値と比較する。ここでは、最大4 kW/cm²の電力が投入された。この高いLHパワー密度は、ポンデロモーティブ力によりグリル前方の電子密度を変化させる。したがって、結合および電力反射係数が変化する。反射係数の電力に対する増加の飽和が観測されることを説明するためには、透過LHパワーによるプラズマの加熱を考慮する必要があり、これによりポロイダル方向に不均一な端部電子密度が生じる。

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ASDEXLower hybrid
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