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

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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

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plasma turbulence
magnetohydrodynamic flow
magnetic islands
electrostatic probes
quadrupoles
turbulence

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas. / Zhao, K. J.; Nagashima, Y.; Li, F. M.; Shi, Yuejiang; Diamond, P. H.; Dong, J. Q.; Itoh, K.; Itoh, S. I.; Zhuang, G.; Liu, H.; Chen, Z. P.; Cheng, J.; Nie, L.; Ding, Y. H.; Hu, Q. M.; Chen, Z. Y.; Rao, B.; Cheng, Z. F.; Gao, L.; Zhang, X. Q.; Yang, Z. J.; Wang, N. C.; Wang, L.; Jin, W.; Yan, W.; Xu, J. Q.; Wu, Y. F.; Yan, L. W.; Fujisawa, A.; Inagaki, S.; Kosuga, Y.; Sasaki, M.

In: Nuclear Fusion, Vol. 57, No. 12, 126006, 12.09.2017.

Research output: Contribution to journalArticle

Zhao, KJ, Nagashima, Y, Li, FM, Shi, Y, Diamond, PH, Dong, JQ, Itoh, K, Itoh, SI, Zhuang, G, Liu, H, Chen, ZP, Cheng, J, Nie, L, Ding, YH, Hu, QM, Chen, ZY, Rao, B, Cheng, ZF, Gao, L, Zhang, XQ, Yang, ZJ, Wang, NC, Wang, L, Jin, W, Yan, W, Xu, JQ, Wu, YF, Yan, LW, Fujisawa, A, Inagaki, S, Kosuga, Y & Sasaki, M 2017, 'Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas', Nuclear Fusion, vol. 57, no. 12, 126006. https://doi.org/10.1088/1741-4326/aa8341
Zhao, K. J. ; Nagashima, Y. ; Li, F. M. ; Shi, Yuejiang ; Diamond, P. H. ; Dong, J. Q. ; Itoh, K. ; Itoh, S. I. ; Zhuang, G. ; Liu, H. ; Chen, Z. P. ; Cheng, J. ; Nie, L. ; Ding, Y. H. ; Hu, Q. M. ; Chen, Z. Y. ; Rao, B. ; Cheng, Z. F. ; Gao, L. ; Zhang, X. Q. ; Yang, Z. J. ; Wang, N. C. ; Wang, L. ; Jin, W. ; Yan, W. ; Xu, J. Q. ; Wu, Y. F. ; Yan, L. W. ; Fujisawa, A. ; Inagaki, S. ; Kosuga, Y. ; Sasaki, M. / Temporal-spatial structures of plasmas flows and turbulence around tearing mode islands in the edge tokamak plasmas. In: Nuclear Fusion. 2017 ; Vol. 57, No. 12.
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AU - Diamond, P. H.

AU - Dong, J. Q.

AU - Itoh, K.

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AU - Cheng, Z. F.

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AU - Zhang, X. Q.

AU - Yang, Z. J.

AU - Wang, N. C.

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AU - Jin, W.

AU - Yan, W.

AU - Xu, J. Q.

AU - Wu, Y. F.

AU - Yan, L. W.

AU - Fujisawa, A.

AU - Inagaki, S.

AU - Kosuga, Y.

AU - Sasaki, M.

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AB - 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.

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