本文提出了在full-f GK代码GENE-X中，由速度空间谱方法加速的边缘与刮削层（SOL）湍流的首次回转动理学（GK）模拟。在原始网格速度空间离散化的基础上，我们推导并实现了一种新的谱公式，并使用制造解法验证了数值实现。我们进行了一系列谱湍流模拟，重点关注TCV-X21参考案例[Oliveira D. S. et al., Nucl. Fusion 62, 096001 (2022)]，并将这些结果与先前验证过的网格模拟[Ulbl P. et al., Phys. Plasmas 30, 107986 (2023)]进行比较。谱方法以极好的一致性和显著更低的速度空间分辨率重现了由捕获电子模（TEM）湍流主导的外侧中平面（OMP）分布（密度、温度和径向电场）。因此，谱方法将计算成本降低了至少一个数量级，在TCV-X21案例中实现了约50倍的加速。这使得在基于现代CPU的超算上，能够在几天内对中型装置执行高保真GK模拟，并确立了GENE-X作为研究边缘与SOL湍流的强大工具，向ITER等反应堆相关装置迈进。
英文摘要：
This paper presents the first gyrokinetic (GK) simulations of edge and scrape-off layer (SOL) turbulence accelerated by a velocity-space spectral approach in the full-f GK code GENE-X. Building upon the original grid velocity-space discretization, we derive and implement a new spectral formulation and verify the numerical implementation using the method of manufactured solution. We conduct a series of spectral turbulence simulations focusing on the TCV-X21 reference case [Oliveira D. S. et al., Nucl. Fusion 62, 096001 (2022)] and compare these results with previously validated grid simulations [Ulbl P. et al., Phys. Plasmas 30, 107986 (2023)]. The spectral approach reproduces the outboard midplane (OMP) profiles (density, temperature, and radial electric field), dominated by trapped electron mode (TEM) turbulence, with excellent agreement and significantly lower velocity-space resolution. Thus, the spectral approach reduces the computational cost by at least an order of magnitude, achieving a speed-up of approximately 50 for the TCV-X21 case. This enables high-fidelity GK simulations to be performed within a few days on modern CPU-based supercomputers for medium-sized devices and establishes GENE-X as a powerful tool for studying edge and SOL turbulence, moving towards reactor-relevant devices like ITER.
A coherent structure transport model for scrape-off layer turbulence
Renewable and Sustainable Energy Institute, University of Colorado（科罗拉多大学可再生与可持续能源研究所）；Lodestar Research Corporation（洛德斯特研究公司）；Center for Integrated Plasma Studies, University of Colorado（科罗拉多大学综合等离子体研究中心）；General Atomics（通用原子能公司）；Massachusetts Institute of Technology（麻省理工学院）
Towards fully predictive gyrokinetic full-f simulations: validation and triangularity studies in TCV
Princeton Plasma Physics Laboratory（普林斯顿等离子体物理实验室）；General Atomics（通用原子能公司）；University of California San Diego（加州大学圣地亚哥分校）；Sandia National Laboratories（桑迪亚国家实验室）
Turbulent Origin of the Edge Radial Electric Field Asymmetry between Favourable and Unfavourable Drift Configurations
Max-Planck-Institut für Plasmaphysik（马克斯·普朗克等离子体物理研究所）；Laboratoire de Physique des Plasmas, CNRS-École Polytechnique（巴黎综合理工学院等离子体物理实验室）；École Polytechnique Fédérale de Lausanne (EPFL)（洛桑联邦理工学院）
