arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1702.01407physics.plasm-ph
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环形几何中用于电磁模拟的回旋运动离子和漂移运动电子模型

Gyrokinetic ion and drift kinetic electron model for electromagnetic simulation in the toroidal geometry

J. Bao, D. Liu, Z. Lin

摘要:

电子的动力学效应对长波长磁流体动力学(MHD)不稳定性和短波长漂移Alfvenic不稳定性都很重要,因为非绝热电子可以与低频不稳定性相互作用,改变和驱动低频不稳定性。提出了一种新的守恒分裂权方法,用于托卡马克等离子体中漂移动力学电子的电磁场模拟,该方法在不牺牲物理特性的前提下,不受垂直网格尺寸对电子趋肤深度的数值约束,具有很大的计算优势.利用该模型验证了动力学Alfven波和无碰撞撕裂模的存在,并已将其应用于GTC程序中。该模型将用于微撕裂模和基于第一性原理的新经典撕裂模的模拟。

英文摘要:

The kinetic effects of electrons are important to long wavelength magnetohydrodynamic(MHD)instabilities and short wavelength drift-Alfvenic instabilities responsible for turbulence transport in magnetized plasmas, since the non-adiabatic electron can interact with, modify and drive the low frequency instabilities. A novel conservative split weight scheme is proposed for the electromagnetic simulation with drift kinetic electrons in tokamak plasmas, which shows great computational advantages that there is no numerical constrain of electron skin depth on the perpendicular grid size without sacrificing any physics. Both kinetic Alfven wave and collision-less tearing mode are verified by using this model, which has already been implemented into the gyrokinetic toroidal code(GTC). This model will be used for the micro tearing mode and neoclassical tearing mode simulation based on the first principle in the future.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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