Impact of coherent mode on divertor particle and heat flux in a type I ELMy H mode plasma on EAST tokamak

被引：1
|
作者：
Long, F. F. [1 ,2 ]
Zhang, T. [3 ]
Ming, T. F. [3 ]
Liu, X. J. [3 ]
Meng, L. Y. [3 ]
Wu, M. F. [3 ]
Li, B. [3 ]
Liang, R. R. [3 ]
Wu, M. Q. [1 ,2 ]
Hao, B. L. [1 ,2 ]
Tang, T. F. [1 ,2 ]
Chen, M. W. [4 ]
Liu, S. C. [4 ]
Wang, Y. M. [3 ]
Han, X. [5 ]
Liu, H. Q. [3 ]
Zhao, H. L. [3 ]
Zang, Q. [3 ]
Wang, L. [3 ]
Zeng, L. [3 ]
Li, G. Q. [3 ]
Gao, X. [1 ,2 ,3 ]
机构：
[1] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China
[2] Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[4] Anhui Univ, Informat Mat & Intelligent Sensing Lab Anhui Prov, Hefei 230601, Anhui, Peoples R China
[5] ENN Sci & Technol Dev Co Ltd, Hebei Key Lab Compact Fus, Langfang 065001, Peoples R China
来源：
NUCLEAR FUSION | 2022年 / 62卷 / 09期
基金：
国家重点研发计划; 中国博士后科学基金; 中国国家自然科学基金;
关键词：
pedestal turbulence; coherent mode; particle flux; SOL decay length; EAST tokamak; TRANSPORT;
D O I：
10.1088/1741-4326/ac7e5c
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：
The paper investigates the effect of pedestal turbulence, i.e. coherent mode (CM), on the divertor total particle flux, the particle flux distribution and heat flux distribution, and their decay lengths in the scrape-off layer (SOL) region on EAST tokamak. The experimental evidence indicates the coherence between the pedestal CM and the divertor particle flux fluctuation, which implies that the pedestal CM can affect the divertor plasma behavior. The increase of the particle flux decay length (lambda(js)) correlates with the density radial decay length (lambda(n,SOL)) in the SOL region where the lambda(n,SOL) is largely affected by the change of pedestal CM amplitude. A quantitative statistical analysis shows that the divertor total particle flux and lambda(js) in the SOL region increase with increasing amplitude of the electron density fluctuation and the electron temperature fluctuation induced by the pedestal CM. The temporal decay process of the total particle flux is interrupted by the appearance of CM at the pedestal. Meanwhile, the spatial distributions of the divertor particle flux and heat flux are enhanced when the pedestal CM appears, which are observed in both the upper single null and lower single null configurations.
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页数：10
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