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X-ray diagnostics for investigating electron distribution functions and electron potential confinements

T Cho, M Hirata, J Kohagura, Y Sakamoto, S Miyoshi1997年Fusion Engineering and DesignIF 1.7出版社

AbstractX-ray radiation from the GAMMA 10 tandem-mirror plasmas is investigated so as to interpret the electron-velocity-distribution functions as well as the formation mechanism of plasma-confining potentials from the X-ray data. In particular, plasma-electron behavior in the thermal-barrier and the plug regions are highlighted. Two different shapes of the distribution functions (i.e., relativistic Maxwellian electrons and plateau-shaped electrons bounded by an electron-confining potential) characterize the barrier and the plug plasmas, respectively. For the X-ray-data analyses, we employ a new theory on the X-ray response of semiconductor detectors. In particular, it is noted that the use of this theory modifies analysis results from the conventional X-ray-response theory in textbooks, which was employed over this quarter of the century for plasma-electron-temperature analyses.

日本語訳

GAMMA 10タンデムミラーラズマからのX線放射を調査し、X線データから電子速度分布関数およびプラズマ閉じ込めポテンシャルの形成機構を解釈する。特に、サーマルバリア領域およびプラグ領域におけるプラズマ電子の挙動に焦点を当てる。2つの異なる形状の分布関数(すなわち、相対論的マクスウェル電子および電子閉じ込めポテンシャルによって境界付けられたプラトー状電子)が、それぞれバリアプラズマおよびプラグプラズマを特徴づける。X線データ解析には、半導体検出器のX線応答に関する新理論を採用する。特に、この新理論の使用により、この四半世紀にわたりプラズマ電子温度解析に用いられてきた教科書的な従来のX線応答理論とは異なる解析結果が得られることに留意する。

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Plasma diagnostics
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