Electromagnetic turbulence is addressed in tokamak and stellarator plasmas with the global gyrokinetic particle-in-cell codes ORB5 (E Lanti et al, Comp. Phys. Comm., 251, 107072 (2020)) and EUTERPE (V Kornilov et al, Phys. Plasmas, 11, 3196 (2004)). The large-aspect-ratio tokamak, down-scaled ITER, and Wendelstein 7-X geometries are considered. The main goal is to increase the plasma beta, the machine size, the ion-to-electron mass ratio, as well as to include realistic-geometry features in such simulations. The associated numerical requirements and the computational cost for the cases on computer systems with massive GPU deployments are investigated. These are necessary steps to enable electromagnetic turbulence simulations in future reactor plasmas.
要旨：本文探讨了在托卡马克和仿星器等离子体中，利用全局回旋动理学粒子-in-cell 代码 ORB5（E Lanti 等，Comp. Phys. Comm., 251, 107072 (2020)）和 EUTERPE（V Kornilov 等，Phys. Plasmas, 11, 3196 (2004)）处理电磁湍流问题。研究考虑了大纵横比托卡马克、缩小版 ITER 以及 Wendelstein 7-X 仿星器几何构型。主要目标是提高等离子体 β 值、增大装置尺寸、提升离子与电子质量比，并在此类模拟中纳入真实几何特征。同时，考察了在配备大规模 GPU 的计算机系统上运行这些案例所涉及的相关数值方法和计算成本。这些工作是实现未来反应堆等离子体中电磁湍流模拟所必需的关键步骤。