Dynamics of Low-Intermediate-High-Confinement Transitions in Toroidal Plasmas

被引：112

作者：

Cheng, J. ^{[1
]}

Dong, J. Q. ^{[1
,2
]}

Itoh, K. ^{[3
]}

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

Xu, M. ^{[1
]}

Zhao, K. J. ^{[1
,4
]}

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

Huang, Z. H. ^{[1
]}

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

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

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

Itoh, S. -I. ^{[5
]}

Nie, L. ^{[1
,6
]}

Kong, D. F. ^{[6
]}

Lan, T. ^{[6
]}

Liu, A. D. ^{[6
]}

Zou, X. L. ^{[7
]}

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 310027, Peoples R China

[3] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[4] Natl Fus Res Inst, WCI Ctr Fus Theory, Taejon 305333, South Korea

[5] Kyushu Univ, Appl Mech Res Inst, Fukuoka 8168580, Japan

[6] USTC, Dept Modern Phys, Hefei 230026, Peoples R China

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

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 26期

关键词：

H-MODE TRANSITION; TOKAMAK; BEHAVIOR;

D O I：

10.1103/PhysRevLett.110.265002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The dynamic features of the low-intermediate-high-(L-I-H) confinement transitions on HL-2A tokamak are presented. Here we report the discovery of two types of limit cycles (dubbed type-Y and type-J), which show opposite temporal ordering between the radial electric field and turbulence intensity. In type-Y, which appears first after an L-I transition, the turbulence grows first, followed by the localized electric field. In contrast, the electric field leads type-J. The turbulence-induced zonal flow and pressure-gradient-induced drift play essential roles in the two types of limit cycles, respectively. The condition of transition between types-Y and -J is studied in terms of the normalized radial electric field. An I-H transition is demonstrated to occur only from type-J.

引用

页数：5

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