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Computational modelling of the effect of a resistive shell on the RFX reversed field pinch experiment

D.D. Schnack, S. Ortolani1990年被引用 44Nuclear FusionIF 3出版社

Non-linear numerical simulations of a reversed field pinch (RFP) with RFX geometry are presented. Emphasis is on the probable effect of a thin (resistive) shell design on experimental operation. Calculations are performed over a range of Lundquist number S and pinch parameter Θ, with realistic geometric parameters. It is found that operation with a thin shell is likely to be characterized by an enhanced fluctuation level, increased loop voltage and generally degraded plasma performance. This conclusion is independent of the specific value of the design thin shell time constant as long as this value is significantly less than the design discharge time. Specific scalings of loop voltage with Lundquist and pinch parameter are given. Results relevant to toroidal phase locking are also reported.

日本語訳

反転磁場ピンチ(RFP)のRFX形状を用いた非線形数値シミュレーションを提示する。重点は、薄い(抵抗性)シェル設計が実験に及ぼすであろう影響に置かれる。計算は、現実的な幾何学的パラメータを用いて、ランドキスト数SおよびピンチパラメータΘの範囲にわたって実施される。薄いシェルを用いた運転は、変動レベルの増大、ループ電圧の上昇、および全般的なプラズマ性能の低下を特徴とすることが見出される。この結論は、設計上のシェル時定数が設計上の放電時間よりも有意に短い限り、設計上のシェル時定数の具体的な値に依存しない。ループ電圧のランドキスト数およびピンチパラメータに対する具体的なスケーリング則が示される。トロイダル位相ロックに関連する結果も報告される。

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