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Edge physics in reversed-field pinch and tokamak: similarities and differences

V Antoni1997年Plasma Physics and Controlled FusionIF 2.2出版社

The edge-region properties of a reverse-field pinch (RFP) configuration are reviewed and a comparison with those of tokamaks is attempted. Despite the different magnetic configurations, many similarities have been observed. Among the similarities is the electrostatic nature of the particle transport and the structure of the plasma potential. In particular the radial electric field changes sign across the last closed flux surface and gives rise to an velocity shear layer. The anomalous transport driven by electrostatic and magnetic fluctuations is addressed and the regimes of improved confinement recently observed in RFPs are reviewed. The role of the velocity shear on turbulence stabilization in these regimes is discussed.

日本語訳

反転磁場ピンチ(RFP)配位の端部領域特性を概説し、トカマクとの比較を試みる。磁気配位は異なるにもかかわらず、多くの類似点が観測されている。その類似点の一つとして、粒子輸送の静電的性質とプラズマ電位の構造が挙げられる。特に、動径電場は最終閉鎖磁気面を横切って符号が反転し、速度シア層を生じさせる。静電的および磁気的揺らぎによって駆動される異常輸送について考察し、最近RFPで観測された閉じ込め改善領域を概説する。これらの領域における乱流安定化に対する速度シアの役割について議論する。

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Reversed field pinch
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