在负三角形的托卡马克边缘中,坚固地避免边缘局部化模式与梯度形成一起
A O Nelson1, L Schmitz2, C Paz-Soldan1
1Columbia University, New York, New York 10027, USA.
Physical review letters
|November 24, 2023
概括
强大的负三角形 (NT) 等离子体成型有效地抑制融合装置中的边缘局部化模式 (ELM) 不稳定性. 这一发现支持NTNT.
科学领域:
- 核聚变能源研究研究
- 等离子体物理学的物理学
- 托卡马克运营活动 托卡马克运营活动
背景情况:
- 边缘局部化模式 (ELM) 是托卡马克等离子体中短暂的不稳定性,可以损坏反应堆壁.
- 控制ELM对于可持续的核聚变能源生产至关重要.
- 作为一种ELM抑制方法,正在探索等离子体成型,特别是负三角性 (NT).
研究的目的:
- 调查强负三角形 (NT) 塑造在抑制边缘局部化模式 (ELM) 活动中的有效性.
- 为了确定在哪些等离子体条件下,NT能够强大抑制ELM.
- 评估NT对未来核聚变反应堆设计的影响.
主要方法:
- 在DIII-D托卡马克上进行了高性能转移排放.
- 系统地改变了等离子体参数,包括线平均密度,辅助加热功率和圆形磁场.
- 分析了边缘等离子体形状和稳定性极限.
主要成果:
- 强大的NT造型强烈地抑制了在广泛的等离子条件下观察到的所有ELM活动.
- 实验压力档案保持在或低于无限-n气球的稳定性极限,与理论一致.
- 在NT等离子体中边缘压力梯度接近H模式水平,超过典型L模式等离子体中的水平.
结论:
- 负三角形等离子成型是用于核聚变装置中强大的ELM抑制的可行策略.
- 观察到的稳定性归因于NT边缘的磁切削阻碍了ELMing H模式模式的访问.
- 由于改善了边缘等离子体封闭和稳定性,NT配置对未来的核聚变反应堆设计有希望.
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