Observation of Blobs and Holes in the Boundary Plasma of EAST Tokamak

Ning Yan, Guosheng Xu, Wei Zhang, Jiafeng Chang, Liang Wang, Shaocheng Liu, Peng Liu, Huiqian Wang, Min Jiang, Hao Xiong, Siye Ding, Baonian Wan, Xiang Gao, Volker Naulin, Anders Henry Nielsen, Jens Juul Rasmussen

    Research output: Contribution to journalJournal articleResearchpeer-review


    Intermittent convective transport at the edge and in the scrape-off layer (SOL) of EAST was investigated by using fast reciprocating Langmuir probe. Holes, as part of plasma structures, were detected for the first time inside the shear layer. The amplitude probability distribution function of the turbulence is strongly skewed, with positive skewed events (“blobs") prevailing in the SOL region and negative skewed events (“holes") dominant inside the shear layer. The statistical properties coincide with previous observations from JET. The generation mechanism of blobs and holes is also discussed. In addition burst structure and dynamics character of them are also presented.
    Original languageEnglish
    JournalPlasma Science and Technology
    Issue number4
    Pages (from-to)410-414
    Publication statusPublished - 2011


    • Fusion energy


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