Plasma Physics and Controlled Fusion ( IF 2.1 ) Pub Date : 2020-11-21 , DOI: 10.1088/1361-6587/abc63b R Arbon 1 , J Candy 2 , E A Belli 2
We propose a novel flux-surface parameterization suitable for local MHD equilibrium calculations with strongly-shaped flux surfaces. The method is based on a systematic expansion in a small number of intuitive shape parameters, and reduces to the well-known Miller D-shaped parameterization in the limit where some of the coefficients are set to zero. The new parameterization is valid for up-down asymmetric plasmas and provides an improvement to the Miller form. Simultaneously, the method is rapidly convergent and requires only about half the number of shape parameters as a general Fourier representation in the pedestal.
中文翻译:
快速收敛的磁通表面形状参数化
我们提出了一种新颖的通量表面参数化方法,适用于具有强形通量表面的局部MHD平衡计算。该方法基于少量直观形状参数的系统扩展,并在某些系数设置为零的极限范围内减少到众所周知的Miller D形参数化。新的参数化对于上下不对称等离子体有效,并且对Miller形式进行了改进。同时,该方法快速收敛,并且仅需要形状参数的大约一半即可作为基座中的一般傅立叶表示。