ASDEX Upgrade 中由 SPI 诱导的失能演化
摘要
失能是基于托卡马克原理的未来聚变堆堆面临的主要关切。为确保机器防护，在失能期间产生的热负荷和容器力必须被可靠地缓解。对于 ITER 失能缓解系统 (DMS)，已选定碎块注入 (SPI) 技术。它能够提供将注入材料迅速输送到等离子体核心的能力，其缓解效率取决于碎块大小和速度。在 ASDEX Upgrade (AUG) 上构建并安装了一个高度灵活的 SPI 系统，以助力 ITER DMS 的最终化进程并为建模提供关键输入。2022 年 AUG 实验中的 SPI 诱导失能遵循典型的事件链，其中被本文讨论：第一束光、主碎块到达、等离子体运动事件、MARFE、热快速/等离子体电流尖峰、电流快速、垂直位移事件阶段。 Depending on the injection parameters, these phases may vary significantly or some might not be present at all. In this paper, we will focus on the characterization of these disruption phases and figures of merit for the mitigation efficiency, depending on the SPI configuration. With increasing amount of assimilated neon in the plasma - primarily influenced by the neon content in the pellet but also the shattering parameters - the disruptions exhibit different behaviors. This disruption evolution seems to be a continuous process, with the most prominent feature being the changing disruption time scales and plasma current time trace shape during the CQ from convex (poorly or unmitigated) \rightarrow concave (well mitigated/radiation dominated). Depending on the injection, pre-TQ durations between 15 - 0.5 ms and early CQ durations (\Delta \textrm{t}_\textrm{CQ}^{100 \rightarrow 80}) between 13.3 - 8.2 ms had been achieved at AUG.
引用
@article{arxiv.2604.05488,
title = {Evolution of SPI-induced disruptions in ASDEX Upgrade},
author = {P. Heinrich and G. Papp and S. Jachmich and J. Artola and M. Bernert and P. de Marné and M. Dibon and R. Dux and T. Eberl and O. Ficker and P. Halldestam and J. Hobirk and M. Hoelzl and F. Klossek and M. Lehnen and T. Lunt and M. Maraschek and A. Patel and T. Peherstorfer and N. Schwarz and U. Sheikh and B. Sieglin and J. Svoboda and W. Tang and the ASDEX Upgrade Team and the EUROfusion Tokamak Exploitation Team},
journal= {arXiv preprint arXiv:2604.05488},
year = {2026}
}
备注
22 pages, 14 figures