Gyrokinetic simulations of the effects of magnetic islands on microturbulence in KSTAR
Xishuo Wei, Javier H Nicolau, Gyungjin Choi, Zhihong Lin, SeongMoo Yang, SangKyeun Kim, WooChang Lee, Chen Zhao, Tyler Cote, JongKyu Park, Dmitri Orlov
利用回旋动理学模拟研究了在具有共振磁扰动的 KSTAR 托卡马克中，磁岛对离子温度梯度（ITG）湍流的影响。模拟表明，输运受 ITG 湍流与自生涡流和带状流之间非线性相互作用的控制，从而在极向平面和环向上形成涨落与输运的各向异性结构。磁岛显著增强了粒子和热量的湍流输运。湍流输运在环向上表现出变化：当磁岛 X 点位于外侧中平面时，通过 X 点附近共振层的输运得到增强。模拟与 KSTAR 实验在时间频率和垂直波矢谱方面表现出定量一致。
英文摘要：
Gyrokinetic simulations are utilized to study effects of magnetic islands on the ion temperature gradient (ITG) turbulence in the KSTAR tokamak with resonant magnetic perturbations. Simulations show that the transport is controlled by the nonlinear interactions between the ITG turbulence and self-generated vortex flows and zonal flows, leading to an anisotropic structure of fluctuation and transport on the poloidal plane and in the toroidal direction. Magnetic islands greatly enhance turbulent transport of both particle and heat. The turbulent transport exhibits variations in the toroidal direction, with transport through the resonant layer near the island X-point being enhanced when the X-point is located at the outer mid-plane. A quantitative agreement is shown between simulations and KSTAR experiments in terms of time frequency and perpendicular wavevector spectrum.
Gyrokinetic simulation of the effect of transient fueling on plasma turbulence in ADITYA-U tokamak
Indian Institute of Science Bangalore（印度科学研究所班加罗尔分院）；Institute for Plasma Research, Bhat（巴特等离子体研究所）；Homi Bhabha National Institute（霍米·巴巴国立研究所）；Centre for Development of Advanced Computing（高级计算发展中心）；Department of Physics and Astronomy, University of California Irvine（加州大学尔湾分校物理与天文学系）
Cross-scale Interaction between Microturbulence and Fishbone in Fusion Plasmas
CAS Key Laboratory of Frontier Physics in Controlled Nuclear Fusion, School of Nuclear Science and Technology, University of Science and Technology of China（中国科学院受控核聚变前沿物理重点实验室，中国科学技术大学核科学与技术学院）；Institute of Plasma Physics, Chinese Academy of Sciences（中国科学院等离子体物理研究所）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Department of Physics and Astronomy, University of California, Irvine（加州大学尔湾分校物理与天文学系）
$T_i/T_e$ Dependence of Core Turbulence and Transport in DIII-D QH-Mode Plasmas
Indian Institute of Science（印度科学学院）；University of California, Los Angeles（加州大学洛杉矶分校）；Princeton Plasma Physics Laboratory（普林斯顿等离子体物理实验室）；Institute for Plasma Research（等离子体研究所）；Homi Bhabha National Institute（霍米·巴巴国家研究所）；University of California Irvine（加州大学尔湾分校）
Electromagnetic turbulence in EAST plasmas with internal transport barrier
CAS Key Laboratory of Frontier Physics in Controlled Nuclear Fusion, School of Nuclear Sciences and Technology, University of Science and Technology of China（中国科学院前沿物理国家重点实验室，核科学与技术学院，中国科学技术大学）；Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所）；Department of Physics and Astronomy, University of California, Irvine（加州大学尔湾分校物理与天文学系）
本研究通过全局非线性电磁 gyrokinetic 模拟，揭示弱反剪切 EAST 托卡马克 ITB 区域的电磁湍流特性，发现电磁效应可抑制高频 ITG 模、增强带状流剪切以降低热导率，为准确计算输运系数提供关键依据。
