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Intrinsic impurity radiation in attached divertor plasmas

F Laugier, Ph Ghendrih2000年Plasma Physics and Controlled FusionIF 2.2出版社

Divertor plasma radiation due to intrinsic impurities is investigated using a one-dimensional (1D) fluid model. The impurities are generated at the divertor plate by chemical and physical sputtering with yields depending on the energy of the incoming particle flux. With an increase in the heating power, the fraction of radiated power increases if the dependence of the impurity yield on the plasma temperature is sufficiently large. In this case, the range of parameters where attached radiating regimes exist is the largest. However, the self adjustment of the radiation set by intrinsic impurities is shown to be prohibitive in terms of erosion.

日本語訳

固有不純物によるダイバータプラズマ放射を、一次元(1D)流体モデルを用いて調査した。不純物はダイバータ板において、化学的および物理的スパッタリングにより生成され、その収量は入射粒子フラックスに依存する。加熱出力の増加に伴い、不純物収量のプラズマ温度への依存性が十分に大きい場合には、放射出力の割合は増加する。この場合、付着放射状態が存在するパラメータ範囲は最大となる。しかしながら、固有不純物によって設定される放射の自己調整は、侵食の観点からは困難であることが示される。

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