Journal Article

FZJ-2015-02142

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Recent advances in long-pulse high-confinement plasma operations in Experimental Advanced Superconducting Tokamak

Guo, H. Y. (Corresponding Author) ; Li, J.Extern* ; Wan, B. N. ; Gong, X. Z. ; Liang, Y.FZJ* ; Xu, G. S. ; Zhang, X. D. ; Ding, S. Y. ; Gan, K. F. ; Hu, J. S. ; Hu, L. Q. ; Liu, S. C. ; Qian, J. P. ; Sun, Y. W. ; Wang, H. Q. ; Wang, L.Extern* ; Xia, T. Y. ; Xiao, B. J. ; Zeng, L. ; Zhao, Y. P. ; Denner, P.FZJ* ; Ferron, J. R. ; Garofalo, A. M. ; Holcomb, C. T. ; Hyatt, A. W. ; Jackson, G. L. ; Loarte, A. ; Maingi, R. ; Menard, J. E. ; Rack, M.FZJ* ; Solomon, W. M. ; Xu, X. Q. ; Van Zeeland, M. ; Zou, X. L.

2014
American Institute of Physics [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/18173  doi:10.1063/1.4872195

Abstract: A long-pulse high confinement plasma regime known as H-mode is achieved in the Experimental Advanced Superconducting Tokamak (EAST) with a record duration over 30 s, sustained by Lower Hybrid wave Current Drive (LHCD) with advanced lithium wall conditioning and divertor pumping. This long-pulse H-mode plasma regime is characterized by the co-existence of a small Magneto-Hydrodynamic (MHD) instability, i.e., Edge Localized Modes (ELMs) and a continuous quasi-coherent MHD mode at the edge. We find that LHCD provides an intrinsic boundary control for ELMs, leading to a dramatic reduction in the transient power load on the vessel wall, compared to the standard Type I ELMs. LHCD also induces edge plasma ergodization, broadening heat deposition footprints, and the heat transport caused by ergodization can be actively controlled by regulating edge plasma conditions, thus providing a new means for stationary heat flux control. In addition, advanced tokamak scenarios have been newly developed for high-performance long-pulse plasma operations in the next EAST experimental campaign.

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Contributing Institute(s):

1. Plasmaphysik (IEK-4)

Research Program(s):

1. 132 - Tokamak physics for ITER and beyond (POF2-132) (POF2-132)

Appears in the scientific report 2015

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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