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The possible nature of the localized recycling effect on the plasma edge in Tokamaks

M Z Tokar1993年Plasma Physics and Controlled FusionIF 2.2出版社

Inhomogeneities in Tokamak peripheral plasmas due to localized recycling of neutrals (plasma fuelling) are considered. A dense cloud of cold charged particles arises in the vicinity of such a localized particle source, for example a gas-puffing valve, as the plasma density exceeds a certain critical level. A dependence of the critical density on such parameters as dimensions of the device, heat flux from the discharge core and diffusivity of charged particles at the edge is found. The results of calculation are compared with experimental data.

日本語訳

トカマク周辺プラズマにおける、中性粒子の局所的なリサイクリング(プラズマ燃料供給)に起因する不均一性について考察する。このような局所的な粒子源、例えばガスパフ弁の近傍では、プラズマ密度が臨界値を超えると、低温荷電粒子の高密度雲が形成される。臨界密度が、装置の寸法、コアからの熱流束、周辺部における荷電粒子の拡散係数などのパラメータに依存することが見出された。計算結果は実験データと比較される。

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