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Subsonic and supersonic divertor solutions

P C Stangeby1991年Plasma Physics and Controlled FusionIF 2.2出版社

It is necessary to operate a divertor with a sufficiently high plasma density at the symmetry point ns, i.e. adjacent to the main plasma, to satisfy the Lawson criterion and, at the same time, a low enough value of the plasma temperature at the target plate Tt to minimize sputtering. The possibilities for realizing these two objectives simultaneously are examined. It is found that the combination of high ns and low Tt can require that the plasma flow be supersonic before reaching the divertor sheath. It is not known if such plasma conditions are stable.

日本語訳

ローソン基準を満たすためには、ダイバータを、対称点ns(すなわち主プラズマに隣接する点)において十分に高いプラズマ密度で運転し、同時に、スパッタリングを最小化するためにターゲット板Ttにおけるプラズマ温度を十分に低い値にすることが必要である。これら2つの目的を同時に実現する可能性が検討される。高いnsと低いTtの組み合わせは、プラズマ流がダイバータシースに到達する前に超音速であることを要求し得ることが見出された。そのようなプラズマ条件が安定であるかどうかは知られていない。

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