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Wall conditioning in fusion devices and its influence on plasma performance

J Winter1996年Plasma Physics and Controlled FusionIF 2.2出版社

Proper wall conditioning has turned out to be an essential element for achieving the highest possible plasma performance in present day fusion devices. The main issues are controlling the generation of plasma impurities, liberated by plasma - surface interactions, and controlling the recycling hydrogenic fluxes. The underlying mechanisms are discussed in this paper. The paper presents a review of the different wall conditioning methods. It focuses on low-Z wall coatings (beryllium evaporation, boronization, siliconization, lithium pellet injection) and on helium glow discharge cleaning and assesses their effects on fusion plasmas. New wall conditioning concepts, compatible with steady-state magnetic fields, are discussed in view of future large devices with superconducting coils.

日本語訳

適切な壁調整は、現在の核融合装置において可能な限り最高のプラズマ性能を達成するための必須要素であることが明らかになっている。主な課題は、プラズマ-壁相互作用によって放出されるプラズマ不純物の発生を制御することと、水素フラックスのリサイクリングを制御することである。本論文では、その基礎となるメカニズムについて議論する。本論文は、さまざまな壁調整方法のレビューを提示する。低Z壁コーティング(ベリリウム蒸着、ボロナイゼーション、シリコナイゼーション、リチウムペレット入射)とヘリウムグロー放電洗浄に焦点を当て、それらが核融合プラズマに及ぼす影響を評価する。超伝導コイルを備えた将来の大型装置を見据え、定常磁場と両立可能な新しい壁調整コンセプトについて議論する。

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