在一个流动驱动的全球边缘-SOL模拟的托卡马克等离子体的快速流阶段过渡
Wladimir Zholobenko1, Frank Jenko1, Kaiyu Zhang1
1Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany.
Physical review letters
|March 6, 2026
概括
聚变能源研究中的一个动力坡道触发了从漂移波到动力气球模式流的快速过渡. 这导致脚踏堆积和改变的等离子体限制,模仿实验边缘局部化模式周期.
科学领域:
- 血物理学的等离子体物理学
- 核聚变能源的研究.
- 计算天体物理学 计算天体物理学
背景情况:
- 了解等离子体封闭过渡对于开发可行的聚变能源至关重要.
- 从L模式到H模式的转换是托卡马克聚变装置的一个关键现象.
- 流在等离子体运输和封闭中起着重要作用.
研究的目的:
- 通过使用全球全f流模拟来研究L模式到H模式过渡的基础物理.
- 为了识别与基座积累相关的流动力学和运输变化.
- 探索 E×B 流量剪切和地测声学模式在过渡中的作用.
主要方法:
- 使用格里利克斯代码进行全球全f流模拟.
- 在ASDEX升级中,模拟从L模式到H模式的电源坡道.
- 分析等离子体形状,流特征和50 ms以上的流动动力学.
主要成果:
- 在32ms的缓慢的形状演变后,引发了快速的基座积累 (∼100μs).
- 过渡涉及从漂移波 (DW) 突变到动力气球模式 (KBM) 流的突然转变.
- E×B流剪率急剧增加,地质声学模式/Alfvénic流动振荡在消失之前加剧.
- 运输和配置文件中观察到的缓慢振荡类似于实验I相或边缘局部化模式 (ELM) 周期.
结论:
- 这项研究阐明了驱动聚变等离子体内封闭体制转换的微物理机制.
- 这些发现为了解和潜在控制ELM以及改善等离子体封闭提供了基础.
- 这项模拟工作推进了核聚变等离子体在发电过程中的行为预测能力.
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