Investigations of parametric scaling of power exhaust in the alternative divertor configuration (ADC) SOLPS-ITER simulation database of the EU-DEMO are conducted and compared to predictions based on the Lengyel model. The Lengyel model overpredicts the necessary argon concentrations for LFS divertor detachment by about a factor of 5-10 relative to the SOLPS-ITER simulations. Therefore, while the Lengyel model predicts that plasmas with accetable divertor heat loads in EU-DEMO would exceed the tolerable upstream impurity concentrations by a large margin, there are several SOLPS-ITER solutions within an acceptable operational space. The SOLPS-ITER simulations indicate that, unlike assumed by the standard Lengyel model, there are significant heat dissipation mechanisms other than argon radiation, such as cross-field transport, that reduce the role of argon radiation by a factor of 2 to 3. Furthermore, the Lengyel model assumes that the radiation front is powered by parallel heat conduction only, which tends to lead to a narrow radiation front as the radiative efficiency increases strongly with reducing thermal conductivity. As a result, the radiative volume and total impurity radiation are suppressed for a given impurity concentration. However, the SOLPS-ITER simulations indicate that other mechanisms, such as cross-field transport, can compete with parallel heat conduction within the radiative front and increase the radiative volume. Due to these findings, usage of the standard Lengyel model for analyzing scaling between divertor conditions and configurations for devices such as EU-DEMO is strongly discouraged.
Harnessing Toroidal Neutral Flows to Enhance Divertor Particle Exhaust
Gauss Fusion GmbH(高斯聚变有限公司);Oak Ridge National Laboratory(橡树岭国家实验室);United Kingdom Atomic Energy Authority(英国原子能管理局);University of York(约克大学);RI Research Instruments GmbH(RI研究仪器有限公司)
High-power TCV scenario for conventional and alternative divertor studies
Max Planck Institute for Plasma Physics(马克斯·普朗克等离子体物理研究所);Eindhoven University of Technology(埃因霍温理工大学);DIFFER - Dutch Institute for Fundamental Energy Research(荷兰基础能源研究院)
Initial observations in X-point target divertor discharges on MAST-U
University of York(约克大学);Eindhoven University of Technology(埃因霍温理工大学);Oak Ridge National Laboratory(橡树岭国家实验室);University of Liverpool(利物浦大学);DIFFER(荷兰等离子体物理研究所);Max Planck Institute for Plasma Physics(马克斯·普朗克等离子体物理研究所);Ecole Polytechnique Federale de Lausanne (EPFL)(洛桑联邦理工学院)
Fast Dynamic 1D Simulation of Divertor Plasmas with Neural PDE Surrogates
Eindhoven University of Technology(埃因霍温理工大学);École Polytechnique Fédérale de Lausanne(洛桑联邦理工学院);Dutch Institute for Fundamental Energy Research(荷兰基础能源研究所);Forschungszentrum Jülich GmbH(于利希研究中心)
Predicting core transport in ITER baseline discharges with neon injections
University of California San Diego(加州大学圣地亚哥分校);General Atomics(通用原子能公司);Oak Ridge National Laboratory(橡树岭国家实验室);Massachusetts Institute of Technology(麻省理工学院);Proxima Fusion
SafeDivertor: Faithful Divertor Heat Flux Reconstruction from Macroscopic Plasma State Signals via Time-Frequency Prior Exploitation
School of Computer Science and Technology, Anhui University(安徽大学计算机科学与技术学院);Department of Computer Science and Technology, Tsinghua University(清华大学计算机科学与技术系);School of Artificial Intelligence, Anhui University(安徽大学人工智能学院);Institute of Plasma Physics, Chinese Academy of Sciences(中国科学院等离子体物理研究所)
Advantage-level Aggregation Reinforcement Learning for X-point Target Magnetic Configuration Control in an EXL-50U Experiment-Calibrated Simulation Environment
Beijing ENN Fusion Energy Science and Technology Co., Ltd.(北京新奥融合能源科技有限公司);Beijing Key Laboratory of High Magnetic Field Spherical Torus Fusion Energy(北京强磁场球形托卡马克聚变能源重点实验室);Hebei Key Laboratory of Compact Fusion(河北省紧凑型聚变重点实验室);Dalian University of Technology(大连理工大学);School of Physics, Dalian University of Technology(大连理工大学物理学院);Key Laboratory of Materials Modification by Beams of the Ministry of Education(教育部材料表面与界面工程重点实验室);School of Nuclear Science and Engineering, East China University of Technology(东华理工大学核科学与工程学院);East China University of Technology(东华理工大学);School of Mechanics and Engineering Science, Peking University(北京大学力学与工程科学学院);Peking University(北京大学)