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Rotation-transport threshold model of neoclassical tearing modes

S V Konovalov, A B Mikhailovskii, M S Shirokov, V S Tsypin2002年Plasma Physics and Controlled FusionIF 2.2出版社

A rotation-transport threshold model of neoclassical tearing modes (NTMs) issuggested. It is assumed that weakening of the bootstrap currenteffect is determined by competition of perpendicular transportand island rotation, which is in contrast to the known transportthreshold models dealing with the parallel transport or parallelconvection instead of island rotation. It is shown that forsufficiently strong island rotation the perpendicular transportdoes not lead to decreasing the bootstrap current contributioninto the island width evolution equation. It is explained that theisland rotation can prevail over the parallel transport/convectionmainly for the case of ion contribution into the bootstrapcurrent effect. Interrelation between the rotation-transportthreshold model and the known ones is discussed. A generalizedtransport threshold model of NTMs describing the competition ofthe perpendicular transport with the island rotation, paralleltransport and parallel convection is formulated. It is shown thatthe perpendicular transport can lead to weakening the bootstrapdrive contribution only if it overpowers all the competitive effects.

日本語訳

新古典テアリングモード(NTM)の回転-輸送閾値モデルが提案される。ブートストラップ電流効果の弱化が、垂直輸送と島回転の競合によって決定されると仮定される。これは、平行輸送または平行対流を考慮し島回転を考慮しない既知の輸送閾値モデルとは対照的である。十分に強い島回転に対しては、垂直輸送がブートストラップ電流寄与の減少をもたらさないことが示される。島回転が平行輸送/対流よりも優勢となり得るのは、主にイオンがブートストラップ電流効果に寄与する場合であることが説明される。垂直輸送と島回転、平行輸送、平行対流との競合を記述するNTMの一般化された輸送閾値モデルが定式化される。垂直輸送がブートストラップ駆動力を弱化させ得るのは、それがすべての競合効果よりも優勢である場合に限られることが示される。

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Tearing modeNeoclassical tearing mode
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