arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.09057physics.plasm-ph
收藏

近轴磁场用于仿星器Turbulence模拟

The Use of Near-Axis Magnetic Fields for Stellarator Turbulence Simulations

R. Jorge, M. Landreman

摘要:

湍流优化仿星器的设计至今依赖于三维平衡代码,如VMEC,以找到一个给定的目标函数的最小值。在这项工作中,我们提出了一个补充的方法的基础上,近轴膨胀计算的几何参数的新古典优化仿星器用于湍流研究。如图所示,近轴膨胀可以是与现有优化仿星器设计的核心的湍流和稳定性模拟相关的几何参数的合理近似。特别是,我们研究的几何系数出现在gyrokinetic方程,漂移减少流体方程和理想的气球方程。这种方法可以允许比传统方法更快地开发新的仿星器优化技术。

英文摘要:

The design of turbulence optimized stellarators has so far relied on three-dimensional equilibrium codes such as VMEC in order to find the minimum of a given objective function. In this work, we propose a complimentary approach based on the near-axis expansion to compute the geometry parameters of neoclassicaly optimized stellarators used in turbulence studies. As shown here, the near-axis expansion can be a reasonable approximation of the geometric parameters relevant for turbulence and stability simulations of the core of existing optimized stellarator designs. In particular, we examine the geometry coefficients that appear in the gyrokinetic equation, the drift-reduced fluid equations and the ideal ballooning equation. This approach may allow for the development of new stellarator optimization techniques significantly faster than conventional methods.

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。

↑