Turbulence and transport characteristics of a barrier in a toroidal plasma
Turbulence and transport characteristics of a barrier in a toroidal plasma
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DOI：
10.1088/0741-3335/48/4/s15
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发表时间：
2006-04-01
影响因子：
2.2
通讯作者：
Diamond, P. H.
中科院分区：
文献类型：
--
作者：
Fujisawa, A.;Shimizu, A.;Diamond, P. H.
本文用双重离子束探针研究了环形螺旋等离子体中输运势垒处的湍流和纬向流。小波分析用于提取湍流特性，例如密度和势波动的谱、它们之间的相干性和相位以及色散关系。粒子输运估计的基本特征被发现明显上升后，他们的间歇性活动的障碍被打破。随时间变化的分析表明，湍流的不稳定性与定常纬向流的演变有关。
Turbulence and zonal flow at, a transport barrier are studied with twin heavy ion beam probes in a toroidal helical plasma. A wavelet analysis is used to extract turbulence properties, e.g. spectra of both density and potential fluctuations, the coherence and the phase between them and the dispersion relation. Particle transport estimated from the fundamental characteristics is found to clearly rise with their intermittent activities after the barrier is broken down. Time-dependent analysis reveals that the intermittency of turbulence is correlated with the evolution of the stationary zonal flow.