弹丸注入用于托卡马克中的加料和放电控制,并预计将在 ITER 中采用。在弹丸注入期间,由于磁场的不均匀性,烧蚀材料会向低场侧(即大半径向外方向)运动。由于理论模型的复杂性,为模拟跨场漂移而开发的计算机程序计算成本很高。本文提出了一种一维半解析模型,用于描述弹丸注入后烧蚀材料的径向位移;该模型同时考虑了使产生漂移的电荷分离发生短路的 Alfvén 电流和欧姆电流。该模型适用于快速计算径向漂移位移,并可用于例如通过弹丸注入缓解破裂的建模。
英文摘要:
Pellet injection is used for fuelling and controlling discharges in tokamaks, and it is foreseen in ITER. During pellet injection, a movement of the ablated material towards the low-field side (or outward major radius direction) occurs because of the inhomogeneity of the magnetic field. Due to the complexity of the theoretical models, computer codes developed to simulate the cross-field drift are computationally expensive. Here, we present a one-dimensional semi-analytical model for the radial displacement of ablated material after pellet injection, taking into account both the Alfvén and ohmic currents which short-circuit the charge separation creating the drift. The model is suitable for rapid calculation of the radial drift displacement, and can be useful for e.g. modelling of disruption mitigation via pellet injection.
Integrated full pulse modeling for pellet injection in tokamaks: HPI2 model improvement and validation in WEST
DIFFER – Dutch Institute for Fundamental Energy Research(荷兰基础能源研究所);Eindhoven University of Technology(埃因霍温理工大学);ITER Organization(国际热核聚变实验堆组织);CEA Cadarache, IRFM(法国原子能和替代能源委员会卡达拉舍校区,核聚变研究集成设施)
本文改进了 HPI2 模型,通过自洽的等离子体释放空间步长计算,提高了数值稳定性,并在 WEST 实验中验证了其预测能力,支持其在集成建模中的应用。
Spacecraft heat shield study in the DIII-D tokamak
University of California San Diego(加州大学圣迭戈分校);Auburn University(奥本大学);General Atomics(通用原子能公司);Princeton Plasma Physics Laboratory(普林斯顿等离子体物理实验室);Baylor University(贝勒大学);University of Stuttgart(斯图加特大学);Oak Ridge National Laboratory(橡树岭国家实验室);Lawrence Livermore National Laboratory(劳伦斯利弗莫尔国家实验室)
Neural network predictions of plasma confinement loss in Wendelstein 7-X pellet-fueled discharges
Princeton Plasma Physics Laboratory(普林斯顿等离子体物理实验室);Max Planck Institute for Plasma Physics(马克斯·普朗克等离子体物理研究所);SUNY Cortland(纽约州立大学科特兰分校);MIT Plasma Science and Fusion Center(麻省理工学院等离子体科学与聚变中心)
Quantitative 3D non-linear simulations of shattered pellet injection in ASDEX Upgrade using JOREK
Max Planck Institute for Plasma Physics(马克斯·普朗克等离子体物理研究所);Beihang University(北京航空航天大学);ITER Organization(国际热核聚变实验堆组织);Institute of Plasma Physics of the CAS(捷克科学院等离子体物理研究所);CEA/IRFM(法国原子能和替代能源委员会/核聚变研究集成设施);École Polytechnique Fédérale de Lausanne (EPFL)(洛桑联邦理工学院)
Evaluation of spatiotemporal tungsten density profiles using Unresolved Transition Arrays in the Large Helical Device
Tohoku University(东北大学);National Institute for Fusion Science, National Institutes of Natural Sciences(国立研究開発法人 国立融合科学研究所);Graduate Institute for Advanced Studies, SOKENDAI(综合研究大学院大学);Interdisciplinary Graduate School of Engineering and Sciences, Kyushu University(九州大学);Institute of Space and Plasma Sciences, National Cheng Kung University(国立成功大学空间与等离子体科学研究所);Institute of Liberal Arts and Sciences, University of Toyama(富山大学人文社会科学部);Naka Institute for Fusion Science and Technology, National Institutes for Quantum Science and Technology(国立研究開発法人 量子科学技術研究機構 那珂融合科学技術研究所)