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First results from TEXTOR

H Soltwisch, H L Bay, G Bertschinger, P Bogen, H Conrads, K H Dippel, G Fuchs, H Gerhauser, B Giesen, E Graffmann1984年Plasma Physics and Controlled FusionIF 2.2出版社

The paper summarizes the main results obtained during the first six months of experimental work on TEXTOR with ohmically heated plasmas. The machine(R = 175 cm; a = 45-50 cm) was operated at wall temperatures up to 303 oC with hydrogen gas, a toroidal field of 2 T and a maximum plasma current of 500 kA, yielding central electron temperatures of 1.2 keV, maximum line-averaged densities of 4 x 1013 cm-3 and discharge durations of up to 2.7 sec (for Ip⩽340 kA). Besides providing long-lasting reproducible plasmas for forthcoming plasma wall interaction research, the following tasks were accomplished: (1) control of low Z impurities by effective wall cleaning and conditioning; (2) accurate plasma positioning for extended pulse durations; (3) determination of the current density distribution by way of Faraday rotation measurements; (4) investigation of plasma limiter interaction including spectroscopic determination of released neutral particle fluxes and measurement of the power density distribution in the scrape-off layer by infrared-thermography.

日本語訳

本論文は、オーム加熱プラズマを用いたTEXTORにおける最初の6ヶ月間の実験研究で得られた主要な成果をまとめたものである。装置(R = 175 cm; a = 45-50 cm)は、水素ガス、トロイダル磁場2 T、最大プラズマ電流500 kA、壁温度303℃までの条件下で運転され、中心電子温度1.2 keV、最大線平均密度4×10¹³ cm⁻³、放電持続時間最大2.7秒(Ip≦340 kAの場合)が達成された。今後のプラズマ壁相互作用研究に向けた長時間再現性のあるプラズマの提供に加え、以下の課題が達成された:(1)効果的な壁洗浄とコンディショニングによる低Z不純物の制御;(2)長時間放電における正確なプラズマ位置制御;(3)ファラデー回転測定による電流密度分布の決定;(4)スクレープオフ層における赤外線サーモグラフィーを用いた電力密度分布の測定と、分光測定による放出中性粒子フラックスの決定を含む、プラズマ・リミター相互作用の研究。

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