Reduced models of turbulent transport in helical plasmas including effects of zonal flows and trapped electrons
Reduced models of turbulent transport in helical plasmas including effects of zonal flows and trapped electrons
复制标题
螺旋等离子体中湍流输运的简化模型，包括层流和俘获电子的影响
DOI：
10.1017/s0022377820000495
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发表时间：
2020
影响因子：
2.5
通讯作者：
Sugama H.
中科院分区：
文献类型：
--
作者：
Toda S.;Nunami M.;Sugama H.
利用输运模型，研究了囚禁电子对螺旋场位形中纬向流和湍流的影响。本文研究了大螺旋器件中两种不同场位形下俘获电子对带状流线性响应特征量的影响。通过线性和非线性模拟结果确定了与湍流饱和度和典型纬向流波数有关的无量纲参数，简化模型可快速预测湍流势脉动、纬向流势脉动和离子能量输运。纬向流的影响上的湍流传输的情况下的动力学电子响应是远远小于或相当于在绝热电子条件下的两个不同的场配置。它澄清了由于被捕获的电子的湍流输运的纬向流的效果的变化，取决于场的配置。
Using transport models, the impacts of trapped electrons on zonal flows and turbulence in helical field configurations are studied. The effect of the trapped electrons on the characteristic quantities of the linear response for zonal flows is investigated for two different field configurations in the Large Helical Device. The turbulent potential fluctuation, zonal flow potential fluctuation and ion energy transport are quickly predicted by the reduced models for which the linear and nonlinear simulation results are used to determine dimensionless parameters related to turbulent saturation levels and typical zonal flow wavenumbers. The effects of zonal flows on the turbulent transport for the case of the kinetic electron response are much smaller than or comparable to those in an adiabatic electron condition for the two different field configurations. It is clarified that the effect of zonal flows on the turbulent transport due to the trapped electrons changes, depending on the field configurations.