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Experimental studies of stability and beta limit in JET

机译：JET稳定性和β极限的实验研究

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摘要

The paper presents results on the use of resonant field amplification for experimental probing of stability and beta-limits (beta is the ratio of the plasma pressure to the magnetic field pressure) in JET. It is found that an externally applied helical magnetic field is strongly enhanced when the plasma exceeds the ideal no-wall stability limit or approaches proximity to other marginally stable (i.e. current-driven) modes. This effect is known as the resonant field amplification (RFA) and was used for the systematic probing of stability in different advanced regimes on JET. The application of this technique on JET is discussed in the paper and the results of the RFA measurements are presented and related to the observed limitations in beta.
机译：本文介绍了使用共振场放大技术进行JET中稳定性和β极限（β极限是血浆压力与磁场压力之比）的实验探测的结果。已经发现，当等离子体超过理想的无壁稳定性极限或接近其他边缘稳定（即电流驱动）模式时，外部施加的螺旋磁场会大大增强。这种效应被称为共振场放大（RFA），被用于系统探测JET不同先进状态下的稳定性。本文讨论了该技术在JET上的应用，并介绍了RFA测量的结果，并与在beta中观察到的限制有关。

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