Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas

K. J. Zhao, Y. Nagashima, F. M. Li, Yuejiang Shi, P. H. Diamond, J. Q. Dong, K. Itoh, S. I. Itoh, G. Zhuang, H. Liu, Z. P. Chen, J. Cheng, L. Nie, Y. H. Ding, Q. M. Hu, Z. Y. Chen, B. Rao, Z. F. Cheng, L. Gao, X. Q. ZhangZ. J. Yang, N. C. Wang, L. Wang, W. Jin, W. Yan, J. Q. Xu, Y. F. Wu, L. W. Yan, A. Fujisawa, S. Inagaki, Y. Kosuga, M. Sasaki

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The temporal-spatial structures of plasma flows and turbulence around tearing mode islands are presented. The experiments were performed using Langmuir probe arrays in the edge plasmas of J-TEXT tokamak. The correlation analyses clearly show that the flows have similar structures of m/n = 3/1 as the magnetic island does (m and n are the poloidal and toroidal mode numbers, respectively). The sign of the potential fluctuations for the flows inverses and the powers significantly reduce at q = 3 surface. Approaching to the last closed flux surface for the magnetic islands, the radially elongated flow structure forms. The flows are concentrated near separatrix and show quadrupole structures. The turbulence is concentrated near X-point and partly trapped inside the magnetic islands.

Original languageEnglish
Article number126006
JournalNuclear Fusion
Volume57
Issue number12
DOIs
Publication statusPublished - Sep 12 2017

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas'. Together they form a unique fingerprint.

Cite this