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首页> 外文期刊>Plasma and Fusion Research >Study of Plasma Current Decay in the Initial Phase of High Poloidal Beta Disruptions in JT-60U
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Study of Plasma Current Decay in the Initial Phase of High Poloidal Beta Disruptions in JT-60U

机译：JT-60U高倍体β破裂初期等离子体电流衰减的研究

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摘要

In order to validate some current decay models during the current quench, the plasma current decay time was studied using the experimental plasma resistance and inductance in high poloidal beta, βp, disruptions in JT-60U. The plasma resistance and inductance were evaluated from an equilibrium calculation code and the measurement value of a magnetic sensor, the electron temperature evaluated by using ECE measurement and the electron density measured by FIR interferometer. In high βp disruptions, it was found that the electron temperature at the plasma center just after current quench starts was approximately 1-4 keV under almost the same current decay time observed during the initial phase of current quench. This result indicates that the electron temperature itself plays no major role in the determination of the current decay time in the initial phase of current quench. Moreover, the current decay time predicted by a modified L/R model [Y. Shibata et al., Nucl. Fusion 50, 025015 (2010)], in which the time derivative of plasma inductance was considered, was in good agreement with the experimental current decay time, while the values obtained from the conventional L/R model were two orders of magnitude larger than the experimental results.
机译：为了验证电流猝灭过程中的某些电流衰减模型，使用实验性等离子体电阻和电感对高倍数β，β p 在JT-60U中的破坏进行了研究，研究了等离子体电流衰减时间。从平衡计算代码和磁传感器的测量值，通过使用ECE测量评估的电子温度以及通过FIR干涉仪测量的电子密度，评估等离子体电阻和电感。在高β p 中断中，发现在电流猝灭初始阶段观察到的几乎相同的电流衰减时间下，电流猝灭开始后等离子体中心的电子温度约为1-4 keV。 。该结果表明，电子温度本身在电流猝灭初始阶段的电流衰减时间的确定中没有主要作用。此外，通过修改的L / R模型预测的电流衰减时间[Y. Shibata等，Nucl.Natl.Acad.Sci.USA。 [Fusion 50，025015（2010）]，其中考虑了等离子体电感的时间导数，与实验电流衰减时间非常吻合，而从常规L / R模型获得的值要比电导率模型大两个数量级。实验结果。

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