膨胀
恒星仪
物理
磁流体力学
托卡马克
理想(伦理)
特征向量
不稳定性
压力梯度
BETA(编程语言)
回旋动理学
等离子体
机械
量子力学
计算机科学
哲学
认识论
程序设计语言
作者
Rahul Gaur,Stefan Buller,Maximilian E. Ruth,Matt Landreman,Ian Abel,W. Dorland
出处
期刊:Journal of Plasma Physics
[Cambridge University Press]
日期:2023-10-01
卷期号:89 (5)
标识
DOI:10.1017/s0022377823000995
摘要
We demonstrate a fast adjoint-based method to optimise tokamak and stellarator equilibria against a pressure-driven instability known as the infinite- $n$ ideal ballooning mode. We present three finite- $\beta$ (the ratio of thermal to magnetic pressure) equilibria: one tokamak equilibrium and two stellarator equilibria that are unstable against the ballooning mode. Using the self-adjoint property of ideal magnetohydrodynamics, we construct a technique to rapidly calculate the change in the eigenvalue, a measure of ideal ballooning instability. Using the SIMSOPT optimisation framework, we then implement our fast adjoint gradient-based optimiser to minimise the eigenvalue and find stable equilibria for each of the three originally unstable equilibria.
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