Dynamics of low-intermediate-high-confinement transitions in toroidal plasmas

J. Cheng, J. Q. Dong, K. Itoh, L. W. Yan, M. Xu, K. J. Zhao, W. Y. Hong, Z. H. Huang, X. Q. Ji, W. L. Zhong, D. L. Yu, S. I. Itoh, L. Nie, D. F. Kong, T. Lan, A. D. Liu, X. L. Zou, Q. W. Yang, X. T. Ding, X. R. DuanYong Liu

研究成果: Contribution to journalArticle査読

102 被引用数 (Scopus)


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.

ジャーナルPhysical review letters
出版ステータス出版済み - 6 25 2013

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)


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