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Observation of parametric decay correlated with edge heating using an ion Bernstein wave antenna on DIII-D

R.I. Pinsker, C.C. Petty, M.J. Mayberry, M. Porkolab, W.W. Heidbrink1993年被引用 28Nuclear FusionIF 3出版社

Significant levels of parametric decay activity and correlated edge ion heating were observed during injection of high power ion Bernstein waves (IBWs) in DIII-D. Both minority hydrogen ions and majority deuterium ions showed the formation of a high energy perpendicular tail; no parallel heating was observed. The edge ion heating and the parametric decay activity were both strongest when an ion cyclotron harmonic was present at the plasma edge. Ion tail formation had a power threshold of several hundred kilowatts, above which the tail size increased with antenna power; a comparable power threshold for parametric decay instability (PDI) was observed. Both the PDI and the associated edge deuterium heating were found to be sensitive to the hydrogen-to-deuterium ratio

日本語訳

DIII-Dにおいて高パワーのイオン・バーンスタイン波(IBW)を注入した際、有意なレベルのパラメトリック崩壊活動とそれに関連する周辺部イオン加熱が観測された。少数派の水素イオンと多数派の重水素イオンの両方において、高エネルギーの垂直方向テールの形成が見られたが、平行方向の加熱は観測されなかった。周辺部のイオン加熱とパラメトリック崩壊活動は、イオンサイクロトロン高調波がプラズマ周辺部に存在する場合に最も強くなった。イオンテールの形成には数百キロワットのパワー閾値が存在し、その閾値以上ではテールの大きさはアンテナパワーとともに増加した。パラメトリック崩壊不安定性(PDI)についても同様のパワー閾値が観測された。PDIとそれに関連する周辺部重水素イオン加熱は、いずれも水素対重水素比に敏感であることが見出された。

装置

diii-d高精度(タイトル一致)

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DIII-DBernstein waveParametric decayIon Bernstein wave
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