A long-pulse high-confinement plasma regime in the Experimental Advanced Superconducting Tokamak

被引：14
|
作者：
Li, J. [1 ]
Guo, H. Y. [1 ,2 ]
Wan, B. N. [1 ]
Gong, X. Z. [1 ]
Liang, Y. F. [1 ,3 ]
Xu, G. S. [1 ]
Gan, K. F. [1 ]
Hu, J. S. [1 ]
Wang, H. Q. [1 ]
Wang, L. [1 ]
Zeng, L. [1 ]
Zhao, Y. P. [1 ]
Denner, P. [3 ]
Jackson, G. L. [4 ]
Loarte, A. [5 ]
Maingi, R. [6 ,7 ]
Menard, J. E. [6 ]
Rack, M. [3 ]
Zou, X. L. [8 ]
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[2] Tri Alpha Energy Inc, Rancho Santa Margarita, CA 92688 USA
[3] Forschungszentrum Julich, Assoc EURATOM FZ Julich, Inst Energie & Klimaforsch Plasmaphys, Trilateral Euregio Cluster, D-52425 Julich, Germany
[4] Gen Atom Co, San Diego, CA 92186 USA
[5] ITER Org, F-13115 St Paul Les Durance, France
[6] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA
[7] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[8] CEA, IRFM, F-13108 St Paul Les Durance, France
来源：
NATURE PHYSICS | 2013年 / 9卷 / 12期
关键词：
ELMY H-MODES; STABILITY; PERFORMANCE; OPERATION; PROGRESS; ITER;
D O I：
10.1038/NPHYS2795
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
High-performance and long-pulse operation is a crucial goal of current magnetic fusion research. Here, we demonstrate a high-confinement plasma regime known as an H-mode with a record pulse length of over 30 s in the Experimental Advanced Superconducting Tokamak sustained by lower hybrid wave current drive (LHCD) with advanced lithium wall conditioning. We find that LHCD provides a flexible boundary control for a ubiquitous edge instability in H-mode plasmas known as an edge-localized mode, which leads to a marked reduction in the heat load on the vessel wall compared with standard edge-localized modes. LHCD also induces edge plasma ergodization that broadens the heat deposition footprint. The heat transport caused by this ergodization can be actively controlled by regulating the edge plasma conditions. This potentially offers a new means for heat-flux control, which is a key issue for next-step fusion development.
引用
收藏
页码：817 / 821
页数：5
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