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Overview of results in the MST reversed field pinch experiment

机译：MST反向场收缩实验的结果概述

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Confinement in the reversed field pinch (RFP) has been shown to increase strongly with current profile control. The MST RFP can operate in two regimes: the standard regime with a naturally occurring current density profile, robust reconnection and dynamo activity; and the improved confinement regime with strong reduction in reconnection, dynamo and transport. New results in standard plasmas include the observation of a strong two-fluid Hall effect in reconnection and dynamo, the determination that the m = 0 edge resonant mode is nonlinearly driven, and the determination that tearing modes can lock to the wall via eddy currents in the shell. New results in improved confinement plasmas include observations that such plasmas are essentially dynamo-free, contain several isolated magnetic islands (as opposed to a stochastic field) and contain reduced high frequency turbulence. Auxiliary current drive and heating is now critical to RFP research. In MST, a programme to apply auxiliary systems to the RFP is underway and progress has accrued in several techniques, including lower hybrid and electron Bernstein wave injection, ac helicity injection current drive, pellet injection and neutral beam injection.
机译：反向场收缩（RFP）的限制已显示出随着电流曲线控制的增加而大大增加。 MST RFP可以在两种情况下运行：具有自然发生的电流密度分布，稳固的重新连接和发电机活动的标准状态；以及改进的禁闭制度，大大减少了重新连接，发电机和运输。标准等离子体的新结果包括在重新连接和发电机中观察到强双流体霍尔效应，确定m = 0边缘共振模式是非线性驱动的，以及确定撕裂模式可以通过涡流在壁上锁定而确定的。贝壳。改善封闭等离子体的新结果包括观察到，这种等离子体基本上没有发电机，包含几个隔离的磁岛（与随机磁场相反），并且包含减少的高频湍流。辅助电流驱动和加热现在对于RFP研究至关重要。在MST中，正在进行将辅助系统应用于RFP的程序，并且在数种技术方面取得了进展，这些技术包括低混合动力和电子伯恩斯坦波注入，螺旋注入电流驱动，颗粒注入和中性束注入。

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