Ion internal transport barrier in neutral beam heated plasmas on HL-2A

被引：65
|
作者：
Yu, D. L. [1 ]
Wei, Y. L. [1 ]
Liu, L. [1 ]
Dong, J. Q. [1 ,2 ]
Ida, K. [3 ]
Itoh, K. [3 ]
Sun, A. P. [1 ]
Cao, J. Y. [1 ]
Shi, Z. B. [1 ]
Wang, Z. X. [4 ]
Xiao, Y. [2 ]
Yuan, B. S. [1 ]
Du, H. R. [4 ]
He, X. X. [1 ]
Chen, W. J. [1 ]
Ma, Q. [1 ]
Itoh, S. -I. [5 ]
Zhao, K. J. [1 ]
Zhou, Y. [1 ]
Wang, J. [1 ]
Ji, X. Q. [1 ]
Zhong, W. L. [1 ]
Li, Y. G. [1 ]
Gao, J. M. [1 ]
Deng, W. [1 ]
Liu, Yi [1 ]
Xu, Y. [1 ]
Yan, L. W. [1 ]
Yang, Q. W. [1 ]
Ding, X. T. [1 ]
Duan, X. R. [1 ]
Liu, Yong [1 ]
机构：
[1] Southwestern Inst Phys, Chengdu 610041, Peoples R China
[2] Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310003, Zhejiang, Peoples R China
[3] Natl Inst Nat Sci, Natl Inst Fus Sci, 322-6 Oroshicho, Toki, Gifu 5095292, Japan
[4] Dalian Univ Technol, Sch Phys & Optoelect, Dalian 116024, Peoples R China
[5] Kyushu Univ, Appl Mech Res Inst, Kasuga, Fukuoka 8168580, Japan
来源：
NUCLEAR FUSION | 2016年 / 56卷 / 05期
关键词：
internal transport harrier; ion temperature gradient mode; flow shear; MAGNETIC SHEAR; JET; MODE; SURFACES; N=1;
D O I：
10.1088/0029-5515/56/5/056003
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：
Ion internal transport barriers (iITBs) arc first observed in neutral beam injection (NBI) heated plasmas at the I HL-2A tokamak, The position of the barrier foot, in the stationary state, coincides with the q = 1 surface within its uncertainty of measurement. iITBs can develop more easily at the beginning of NBI heating. Also, iITBs are unstable for the sawtooth plasma, Simulations reveal that the thermal diffusivity of ions (x) inside the barrier can be as low as the neoclassical level. It is observed that the flow shear in the stationary iITB state reaches the level required for suppressing the ion temperature gradient mode instability, which indicates the important role of flow shear in sustaining the iITB,
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收藏
页数：8
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