Geometry dependence of the fluctuation intensity in gyrokinetic turbulence

Staebler G. M.; Candy J.; Belli E. A.; Kinsey J. E.; Bonanomi N.; Patel B.

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Geometry dependence of the fluctuation intensity in gyrokinetic turbulence

机译：旋转动力学湍流波动强度的几何依赖性

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The findings of an investigation into the properties of the three dimensional (3D) saturated fluctuation intensity of the electric potential in gyrokinetic turbulence simulations is presented. Scans in flux surface elongation and Shafranov shift are used to isolate the tokamak geometric dependencies. The potential intensity required in order to compute exact fluxes by a quasilinear method is determined using linear eigenmodes computed with the gyrokinetic code. A model of this non-linear intensity is constructed using the linear eigenmode properties and the geometry shape functions obtained from the 3D intensity spectrum. The model computes the poloidal wavenumber spectrum of the electron and ion energy fluxes with unprecedented accuracy. New insights are gained into the way zonal flow mixing saturates ion-scale turbulence by controlling the radial wavenumber width of the turbulence spectrum.

机译：本文介绍了在回旋动力学湍流模拟中对三维（3D）饱和电势涨落强度特性的研究结果。利用通量表面伸长和沙夫拉诺夫位移扫描来分离托卡马克的几何相关性。用拟线性方法计算精确通量所需的位势强度是用回转动力学程序计算的线性本征模确定的。利用线性本征模特性和从三维强度谱获得的几何形状函数，建立了这种非线性强度的模型。该模型以前所未有的精度计算了电子和离子能量通量的极向波数谱。通过控制湍流谱的径向波数宽度，对纬向流混合饱和离子尺度湍流的方式有了新的认识。

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来源
《Plasma physics and controlled fusion》 |2021年第1期|共12页
作者
Staebler G. M.; Candy J.; Belli E. A.; Kinsey J. E.; Bonanomi N.; Patel B.;
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作者单位

Gen Atom San Diego CA 92186 USA;

Gen Atom San Diego CA 92186 USA;

Gen Atom San Diego CA 92186 USA;

CompX San Diego CA USA;

IPP Garching Germany;

CCFE Culham England;

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原文格式 PDF
正文语种 eng
中图分类等离子体物理学;
关键词
tokamak transport; quasi-linear model; gyrokinetic turbulence;

机译：Tokamak运输;准线性模型;陀螺湍流;

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Geometry dependence of the fluctuation intensity in gyrokinetic turbulence

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