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Criterion for zero net erosion at divertor plates in fusion experiments

D. Naujoks1997年被引用 4Nuclear FusionIF 3出版社

The erosion at the divertor plates in future fusion experiments such as ITER has to be reduced by redeposition in order to achieve an acceptable level of net erosion. The favourable effect of redeposition can be enhanced by exploiting the E*B drift motion of the ionized impurity ions in the electric sheath. By a suitable choice of the magnetic field direction and geometry, the peak net erosion at the divertor plates can be minimized. A simple relation has been derived that allows an estimation of the peak net erosion concerning all important effects: erosion by the plasma ions, self-sputtering, prompt redeposition and redeposition due to the upstreaming plasma flow

日本語訳

将来の核融合実験(例えばITER)におけるダイバータ板での侵食は、許容可能な正味侵食量を達成するために、再堆積によって低減されなければならない。再堆積の好ましい効果は、電界シース内における電離した不純物イオンのE×Bドリフト運動を利用することによって強化することができる。磁場方向と幾何学的配置を適切に選択することにより、ダイバータ板でのピーク正味侵食量を最小化することができる。プラズマ流による侵食、自己スパッタリング、即時再堆積、および上流方向のプラズマ流による再堆積を含むすべての重要な効果に関するピーク正味侵食量の推定を可能にする簡単な関係式が導出された。

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DivertorNext European Torus
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