Inputs and Outputs for paper The DESC Stellarator Code Suite Part I: Quick and accurate equilibria computations

Contains the DESC and VMEC input and output files used in the paper, as well as the plotting scripts used to create the figures in the paper (Current with the arxiv Mar 31 2023 version): 3D equilibrium codes are vital for stellarator design and operation, and high-accuracy equilibria are also necessary for stability studies. This paper details comparisons of two 3D equilibrium codes, VMEC, which uses a steepest-descent algorithm to reach a minimum-energy plasma state, and DESC, which minimizes the MHD force error in real space directly. Accuracy as measured by final plasma energy and satisfaction of MHD force balance, as well as other metrics, will be presented for each code, along with the computation time. It is shown that DESC is able to achieve more accurate solutions, especially near-axis. DESC's global Fourier-Zernike basis also yields the solution everywhere in the plasma volume, not just on discrete flux surfaces. Further, DESC can compute the same accuracy solution as VMEC in an order of magnitude less time. Updated dataset for better readability 5-5-23本数据集包含论文中使用的DESC与VMEC的输入输出文件，以及用于生成论文图表的绘图脚本（适配2023年3月31日arXiv发布版本的最新版本）：三维平衡编码对于仿星器的设计与运行至关重要，高精度等离子体平衡同样是稳定性研究的必要前提。本文详细对比了两款三维平衡编码：其中VMEC采用最速下降算法以达到最小能量等离子体状态，而DESC则直接在实空间中最小化磁流体力学（Magnetohydrodynamics，MHD）力误差。本文将展示两款编码在最终等离子体能量、磁流体力学力平衡符合性以及其他评估指标下的精度表现，同时附带各自的计算耗时。研究表明，DESC可获得精度更高的解，尤其在近轴区域。此外，DESC所采用的全局傅里叶-泽尔尼克（Fourier-Zernike）基函数可给出等离子体体积内任意位置的解，而非仅局限于离散的磁通量面。进一步而言，DESC能够以比VMEC少一个数量级的计算时长，得到同等精度的求解结果。本数据集已于2023年5月5日更新，以提升可读性。