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Reflectometric measurement of density and magnetic fluctuations in CRF-driven waves

A Mase, M Kobayashi, N Oyama, T Tokuzawa, T Tamano1997年Fusion Engineering and DesignIF 1.7出版社

AbstractReflectometric techniques have been applied to the GAMMA 10 tandem mirror to measure density and magnetic fluctuations associated with electromagnetic plasma waves in the ion cyclotron range of frequency (ICRF). The excitation and propagation of ICRF-driven waves are studied by reflectometers in order to achieve efficient heating of plasmas. The radial profile of the fluctuation level is expected to give the deposition profile of the heating power. A cross-polarization scattering diagnostic system is also installed in the central cell of GAMMA 10. An incident ordinary (extraordinary) wave is converted to an extraordinary (ordinary) wave by magnetic fluctuations. The converted wave can propagate through a cut-off layer and reach the detector. The level of magnetic fluctuation (about 10−4) is evaluated for the ICRF-driven waves.

日本語訳

反射測定技術は、電磁プラズマ波に関連する密度および磁場の揺動を測定するために、GAMMA 10タンデムミラーに適用されてきた。ICRF駆動波の励起と伝播は、プラズマの効率的な加熱を達成するために、反射計を用いて研究されている。揺動レベルの動径分布は、加熱パワーの堆積分布を与えることが期待される。交差偏波散乱診断システムも、GAMMA 10の中央セルに設置されている。入射する常波(異常波)は、磁場揺動によって異常波(常波)に変換される。変換された波は、遮断層を通過して検出器に到達することができる。磁場揺動のレベル(約10⁻⁴)は、ICRF駆動波に対して評価される。

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