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在HL-2A托卡马克中对磁动力稳定性的综合研究
Physical review. E
|March 19, 2025
概括
研究了HL-2A托卡马克的磁动力不稳定性,揭示了安全因素和等离子体压力 (β) 如何影响气球和扭曲模式. 转器配置显著增加了曲β极限,增强了血稳定性.
科学领域:
- 等离子体物理学的物理学
- 核聚变能源的使用方式
- 磁动力学 磁动力学
背景情况:
- 磁动力学 (MHD) 不稳定性,包括理想的MHD气球和扭曲模式,对于理解像托卡马克这样的聚变装置中的等离子体行为和操作限制至关重要.
- 运行β (β) 极限,表示热压与磁压的比率,由这些不稳定性共同决定.
研究的目的:
- 为了全面研究HL-2A托卡马克的MHD不稳定性.
- 为了研究安全因素 (q) 和β (β) 对理想的MHD气球和扭曲模式的联合影响.
- 在不同的排放配置中 (限制器与分流器) 确定由这些不稳定性所造成的操作β极限.
主要方法:
- 在HL-2A托卡马克中分析理想的MHD气球和扭曲模式.
- 研究安全因子 (q0,qa) 和β (β) 对血平衡和稳定的影响.
- 在限制器和转移器排放配置中比较β极限.
主要成果:
- 观察到一个内部气球模式,在更高的β处具有抛物线压力和电流密度配置文件.
- 多个 toroidal 模式数 (n) 曲折分支可以并存,它们的稳定性取决于安全因素和β.
- 限制器放电中曲模式所施加的β极限 (βN≈2.0) 与气球模式极限 (βN≈1.9) 相似.
- 与气球式β极限 (βN≈1.9) 相比,分流器配置显著增加了曲β极限 (βN=2.5).
结论:
- 在HL-2A中引入一个转移器配置有效地增加了曲β极限,但不是气球式β极限.
- 在HL-2A转向器排放中,最大可实现的β主要受到内部气球模式的限制,除了高性能场景外.
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