Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case
D. S. Oliveira, T. Body, D. Galassi, C. Theiler, E. Laribi, P. Tamain, A. Stegmeir, M. Giacomin, W. Zholobenko, P. Ricci, H. Bufferand, J. A. Boedo, G. Ciraolo,… 展开作者
D. S. Oliveira, T. Body, D. Galassi, C. Theiler, E. Laribi, P. Tamain, A. Stegmeir, M. Giacomin, W. Zholobenko, P. Ricci, H. Bufferand, J. A. Boedo, G. Ciraolo, C. Colandrea, D. Coster, H. de Oliveira, G. Fourestey, S. Gorno, F. Imbeaux, F. Jenko, V. Naulin, N. Offeddu, H. Reimerdes, E. Serre, C. K. Tsui, N. Varini, N. Vianello, M. Wiesenberger, C. Wüthrich, the TCV Team
Self-consistent full-size turbulent-transport simulations of the divertor and SOL of existing tokamaks have recently become feasible. This enables the direct comparison of turbulence simulations against experimental measurements. In this work, we perform a series of diverted Ohmic L-mode discharges on the TCV tokamak, building a first-of-a-kind dataset for the validation of edge turbulence models. This dataset, referred to as TCV-X21, contains measurements from 5 diagnostic systems -- giving a total of 45 1- and 2-D comparison observables in two toroidal magnetic field directions. The dataset is used to validate three flux-driven 3D fluid-turbulence models: GBS, GRILLIX and TOKAM3X. With each model, we perform simulations of the TCV-X21 scenario, tuning the particle and power source rates to achieve a reasonable match of the upstream separatrix value of density and electron temperature. We find that the simulations match the experimental profiles for most observables at the OMP -- both in terms of profile shape and absolute magnitude -- while a poorer agreement is found towards the divertor targets. The match between simulation and experiment is seen to be sensitive to the value of the resistivity, the heat conductivities, the power injection rate and the choice of sheath boundary conditions. Additionally, despite targeting a sheath-limited regime, the discrepancy between simulations and experiment also suggests that the neutral dynamics should be included. The results of this validation show that turbulence models are able to perform simulations of existing devices and achieve reasonable agreement with experimental measurements. Where disagreement is found, the validation helps to identify how the models can be improved. By publicly releasing the experimental dataset, this work should help to guide and accelerate the development of predictive turbulence simulations of the edge and SOL.
Nonlinear generation of global zonal structures in gyrokinetic simulations of TCV and ASDEX Upgrade magnetic configurations
Max-Planck-Institut für Plasmaphysik（马克斯·普朗克等离子体物理研究所）；De Vinci Higher Education, De Vinci Research Center（德芬奇高等教育，德芬奇研究中心）；Institute of Physics, University of Greifswald（格赖夫斯瓦尔德大学物理研究所）；École Polytechnique Fédérale de Lausanne, Swiss Plasma Center（洛桑联邦理工学院，瑞士等离子体中心）
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）
Validation of geometric proxies using negative and positive triangularity plasmas with varying elongation on TCV and multi-machine gyrokinetic simulations
École Polytechnique Fédérale de Lausanne (EPFL)（洛桑联邦理工学院）；Max-Planck-Institut für Plasmaphysik（马克斯·普朗克等离子体物理研究所）；Istituto per la Scienza e la Tecnologia dei Plasmi, CNR（意大利国家研究委员会等离子体科学与技术研究所）；Plasma Science and Fusion Center, Massachusetts Institute of Technology（麻省理工学院等离子体科学与聚变中心）
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）
