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Shearless transport barriers in magnetically confined plasmas

I L Caldas, R L Viana, C V Abud, J C D Fonseca, Z O Guimarães Filho, T Kroetz, F A Marcus, A B Schelin, J D Szezech Jr, D L Toufen2012年Plasma Physics and Controlled FusionIF 2.2出版社

Shearless transport barriers appear in confined plasmas due to non-monotonic radial profiles and cause localized reduction of transport even after they have been broken. In this paper we summarize our recent theoretical and experimental research on shearless transport barriers in plasmas confined in toroidal devices. In particular, we discuss shearless barriers in Lagrangian magnetic field line transport caused by non-monotonic safety factor profiles. We also discuss evidence of particle transport barriers found in the TCABR Tokamak (University of São Paulo) and the Texas Helimak (University of Texas at Austin) in biased discharges with non-monotonic plasma flows.

日本語訳

無シア流輸送障壁は、非単調な動径プロファイルにより閉じ込めプラズマ中に現れ、破壊された後も輸送の局所的な低減を引き起こす。本論文では、トロイダル装置に閉じ込められたプラズマにおける無シア流輸送障壁に関する我々の最近の理論的および実験的研究を要約する。特に、非単調な安全係数プロファイルによって引き起こされるラグランジアン磁力線輸送における無シア流障壁について議論する。また、非単調なプラズマ流を伴うバイアス放電において、TCABRトカマク(サンパウロ大学)およびテキサス・ヘリマック(テキサス大学オースティン校)で見出された粒子輸送障壁の証拠についても議論する。

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