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Detailed comparison of plasma turbulence correlation length measurements using microwave reflectometry and a Langmuir probe array

M Gilmore, W A Peebles, X V Nguyen2000年Plasma Physics and Controlled FusionIF 2.2出版社

Detailed comparisons of reflectometer and Langmuir probe measurements of turbulent radial correlation lengths in the Large Plasma Device (LAPD) at UCLA are presented. The LAPD is a magnetized linear plasma device where detailed measurements of electrostatic turbulence with probe arrays are possible. Furthermore, density profiles are well known and experiments have been conducted over a large number of repeatable discharges, resulting in low levels of measurement and statistical error. It has been found that homodyne reflectometer and probe correlation length measurements are in good agreement, to within 10-15%, over a wide range of density gradient scale lengths and relative fluctuation levels.

日本語訳

カリフォルニア大学ロサンゼルス校(UCLA)の大型プラズマ装置(LAPD)における乱流の径方向相関の反射計測定とラングミュアプローブ測定の詳細な比較を示す。LAPDは磁化された直線状のプラズマ装置であり、プローブアレイを用いた静電乱流の詳細な測定が可能である。さらに、密度分布はよく知られており、多数の再現可能な放電にわたって実験が行われているため、測定誤差および統計誤差は低い。反射計とプローブによる相関長の測定値は、広範囲の密度勾配スケール長および相対変動レベルにわたって、10〜15%以内で良好に一致することが見出された。

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ReflectometryLangmuir probePlasma turbulenceMicrowave reflectometry
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