Hysteresis and Fast Timescale in Transport Relation of Toroidal Plasmas
Hysteresis and Fast Timescale in Transport Relation of Toroidal Plasmas
复制标题
环形等离子体输运关系中的滞后和快时标
DOI：
10.1088/1741-4326/aa796a
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发表时间：
2017
期刊：
影响因子：
3.3
通讯作者：
T. Tsujimur
中科院分区：
文献类型：
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作者：
K. Itoh;S.-I. Itoh;K. Ida;S. Inagaki;Y. Kamada;K. Kamiya;J. Dong;C. Hidalgo;T. Evans;W. Ko;H. Park;T. Tokuzawa;S. Kubo;T. Kobayashi;Y. Kosuga;M. Sasaki;G. Yun;S. Song;N. Kasuya;Y. Nagashima;C. Moon;M. Yoshinuma;R. Makino;T. Tsujimur
本文评估目前的理解滞后运输关系，其影响领域。与等离子体参数的缓慢变化相比，通量的快速变化概述了核心和边缘等离子体。调制ECH实验的解释，其中加热功率周期性地循环开和关，揭示滞后和快速变化的梯度通量关系。关键的发现是，在梯度通量和梯度涨落关系中同时观察到了湍流。在能量、电子和杂质密度通道中存在着快速时标的滞后现象，而在动量通道中则可能存在滞后现象。介绍了数据分析的先进方法。可以通过观察温度扰动的高次谐波来研究输运滞后
This article assesses current understanding of hysteresis in transport relations, and its impact on the field. The rapid changes of fluxes compared to slow changes of plasma parameters are overviewed for both core and edge plasmas. The modulation ECH experiment is explained, in which the heating power cycles on-and-off periodically, revealing hysteresis and fast changes in the gradient–flux relation. The key finding is that hystereses were observed simultaneously in both the the gradient–flux and gradient–fluctuation relations. Hysteresis with rapid timescale exists in the channels of energy, electron and impurity densities, and plausibly in momentum. Advanced methods of data analysis are explained. Transport hysteresis can be studied by observing the higher harmonics of temperature perturbation