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Identification of waves in the lower-hybrid frequency range in the scrape-off layer plasma of Alcator C-Mod

Takahiro Shinya, Seung Gyou Baek, Gregory M. Wallace, Syun'ichi Shiraiwa, Yuichi Takase, Ronald R. Parker, Paul T. Bonoli, Dan Brunner, Ian Faust, Brian L. LaBombard2017年被引用 2Nuclear FusionIF 3出版社

Polarization resolved measurements of the parallel refractive index of the driven RF waves in the lower hybrid (LH) range of frequencies are performed using arrays of RF magnetic probes in the scrape-off layer plasma of Alcator C-Mod. The measured of the RF magnetic field component parallel to the background magnetic field is about  −1.6, which corresponds to the peak of the launched LH spectrum. Based on the wave dispersion relationship, this wave is identified as the LH slow wave. On the other hand, the RF magnetic field component perpendicular to the magnetic field is found to have a lower of  −1.2, and is detected only near the last closed flux surface. This wave is identified as the LH fast wave generated by slow-fast wave mode conversion.

日本語訳

偏光分解測定による、周波数が低域混成(LH)帯域にある駆動RF波の平行屈折率 は、Alcator C-Modのスクレイプオフ層プラズマ中のRF磁気プローブのアレイを用いて実施された。背景磁場に平行なRF磁場成分の測定された は約−1.6であり、これは入射されたLH スペクトルのピークに対応する。波動分散関係に基づき、この波はLHスロー波と同定される。一方、磁場に垂直なRF磁場成分は、より低い の−1....2を有乐队し、最後の閉磁気面の近傍でのみ検出されることが判明した。この波は、スロー波-ファスト波モード変換によって生成されたLHファスト波と同定される。

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alcator-c-mod高精度(タイトル一致)

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Scrape-off layerAlcatorC-Mod
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