An overview of recent HL-2A experiments

被引：29

作者：

Duan, X. R. ^{[1
]}

Ding, X. T. ^{[1
]}

Dong, J. Q. ^{[1
]}

Yan, L. W. ^{[1
]}

Liu, Yi ^{[1
]}

Huang, Y. ^{[1
]}

Song, X. M. ^{[1
]}

Zou, X. L. ^{[2
]}

Xu, M. ^{[1
,3
]}

Yang, Q. W. ^{[1
]}

Liu, D. Q. ^{[1
]}

Rao, J. ^{[1
]}

Xuan, W. M. ^{[1
]}

Chen, L. Y. ^{[1
]}

Mao, W. C. ^{[1
]}

Wang, Q. M. ^{[1
]}

Cao, Z. ^{[1
]}

Li, B. ^{[1
]}

Cao, J. Y. ^{[1
]}

Lei, G. J. ^{[1
]}

Zhang, J. H. ^{[1
]}

Li, X. D. ^{[1
]}

Chen, W. ^{[1
]}

Zhao, K. J. ^{[1
]}

Xiao, W. W. ^{[1
]}

Chen, C. Y. ^{[1
]}

Kong, D. F. ^{[4
]}

Isobe, M. ^{[5
]}

Morita, S. ^{[5
]}

Cheng, J. ^{[1
]}

Chen, S. Y. ^{[4
]}

Cui, C. H. ^{[1
]}

Cui, Z. Y. ^{[1
]}

Deng, W. ^{[1
]}

Dong, Y. B. ^{[1
]}

Feng, B. B. ^{[1
]}

Hong, W. Y. ^{[1
]}

Huang, M. ^{[1
]}

Ji, X. Q. ^{[1
]}

Li, G. S. ^{[1
]}

Li, H. J. ^{[1
]}

Li, Qing ^{[1
]}

Liu, C. H. ^{[1
]}

Peng, J. F. ^{[1
]}

Shi, B. Z. ^{[1
]}

Wang, Y. Q. ^{[1
]}

Yao, L. H. ^{[1
]}

Yao, L. Y. ^{[1
]}

Yu, D. L. ^{[1
]}

Yu, L. M. ^{[1
]}

机构：

[1] Southwestern Inst Phys, Chengdu 610041, Peoples R China

[2] CEA, IRFM, F-13108 St Paul Les Durance, France

[3] Univ Calif San Diego, Ctr Momentum Transport & Flow Org, La Jolla, CA 92093 USA

[4] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China

[5] Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

来源：

NUCLEAR FUSION | 2013年 / 53卷 / 10期

关键词：

ZONAL FLOWS; PLASMA; INTERMITTENCY; TRANSPORT; BOUNDARY; PHYSICS;

D O I：

10.1088/0029-5515/53/10/104009

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

For the first time supersonic molecular beam injection (SMBI) and cluster jet injection (CJI) were applied to mitigate edge-localized modes (ELMs) in HL-2A successfully. The ELM frequency increased by a factor of 2-3 and the heat flux on the divertor target plates decreased by 50% on average after SMBI or CJI. Energetic particle induced modes were observed in different frequency ranges with high-power electron cyclotron resonance heating (ECRH). The high frequency (200-350 kHz) of the modes with a relatively small amplitude was close to the gap frequency of the toroidicity-induced Alfven eigenmode. The coexistent multi-mode magnetic structures in the high-temperature and low-collision plasma could affect the plasma transport dramatically. Long-lived saturated ideal magnetohydrodynamic instabilities during strong neutral beam injection heating could be suppressed by high-power ECRH. The absolute rate of nonlinear energy transfer between turbulence and zonal flows was measured and the secondary mode competition between low-frequency (LF) zonal flows (ZFs) and geodesic acoustic modes (GAMs) was identified, which demonstrated that ZFs played an important role in the L-H transition. The spontaneously generated E x B shear flow was identified to be responsible for the generation of a large-scale coherent structure (LSCS), which provided unambiguous experimental evidence for the LSCS generation mechanism. New meso-scale electric potential fluctuations (MSEFs) at frequency f similar to 10.5 kHz with two components of n = 0 and m/n = 6/2 were also identified in the edge plasmas for the first time. The MSEFs coexisted and interacted with magnetic islands of m/n = 6/2, turbulence and LF ZFs.

引用

页数：9

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