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H-modes under steady-state conditions in JET

D J Campbell, S Ali Arshad, A Gondhalekar, P R Thomas1994年Plasma Physics and Controlled FusionIF 2.2出版社

Two H-mode regimes have been identified in JET in which edge localized modes (ELMs) maintain steady-state conditions. In the first regime, strong gas puffing was used in combined (ICRF plus NBI) heating experiments at powers of up to 20MW. Rapid ELM activity occurred and at moderate powers ( approximately 8MW) steady-state H-modes with durations of up to 18s and energy confinement times of up to 95% of the JET/D-IIID scaling were established. At high toroidal beta ( beta N>or=1.5) H-mode plasmas were also found to exhibit regular ELM behaviour which resulted in steady-state H-modes with confinement enhancement of approximately 90% of the JET/D-IIID scaling. This paper examines the plasma properties of these regimes and assesses their implications for steady-state H-mode operation in ignited plasmas.

日本語訳

JETにおいて、エッジ局在モード(ELM)が定常状態を維持する2つのHモード領域が同定された。第1の領域では、最大20MWの出力での複合(ICRF+NBI)加熱において強力なガス入射が用いられた。急速なELM活動が発生し、中程度の出力(約8MW)では、最大18秒間の定常Hモードと、JET/D-III-Dスケーリングの最大95%のエネルギー閉じ込め時間が達成された。高トロイダルベータ(β_N>1.5)のHモードプラズマでも、規則的なELM挙動が観察され、その結果、JET/D-III-Dスケーリングの約90%の閉じ込め改善を伴う定常Hモードが実現された。本論文では、これらの領域におけるプラズマ特性を検討し、点火プラズマにおける定常Hモード運転への影響を評価する。

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jet高精度(タイトル一致)

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