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Sensitive Thomson scattering from a low-density plasma using a repetitively pulsed Nd:YAG laser

M Bessenrodt-Weberpals, H Kempkens, J Uhlenbusch1986年Plasma Physics and Controlled FusionIF 2.2出版社

Electron density and temperature measurements by repetitively pulsed 90 degrees Thomson scattering from a steady state, low-density plasma with superimposed magnetic field are reported. The density is calibrated by Rayleigh scattering from argon; a pressure scan shows that the stray-light signal is the same as the Rayleigh scattering from 2.7 Pa argon. The detection sensitivity of the Thomson experiment reaches 1010 electrons and an accuracy of 10% is achieved by a nonlinear three-parameter fitting procedure. Electron data are presented resulting from measurements in the middle of the arc. To study plasma-wall interaction the vicinity of the plane anode is investigated, too.

日本語訳

電子密度および電子温度の測定を、繰り返しパルス90度トムソン散乱により、定常状態の低密度プラズマに磁場を重畳した条件下で行った結果について報告する。密度の較正はアルゴンによるレイリー散乱を用いて行われ、圧力走査により、迷光信号が2.7 Paのアルゴンによるレイリー散乱と同一であることが示された。トムソン散乱実験の検出感度は10¹⁰電子に達し、非線形3パラメータフィッティング手順により10%の精度が達成された。電子データはアーク中央部での測定結果として提示される。プラズマ・壁相互作用を研究するため、平面陽極近傍も同様に調査された。

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