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Spontaneous Formation of Plasmoid during Early Magnetic Reconnection Phase of Two Merging Tokamaks
Author(s) -
Cao Qinghong,
Cai Yunhan,
Akimitsu Moe,
Xiang Junguang,
Ahmadi Tara,
Tanaka Haruaki,
Tanabe Hiroshi,
Ono Yasushi
Publication year - 2020
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.23208
Subject(s) - plasmoid , axial symmetry , plasma , physics , toroid , tokamak , magnetic reconnection , jet (fluid) , phase (matter) , plane (geometry) , magnetohydrodynamics , mechanics , computational physics , nuclear physics , geometry , quantum mechanics , mathematics
A new type of spontaneous formation of plasmoid is observed in our toroidal plasma merging experiment on TS‐6 using a newly developed high‐resolution magnetic probe array, which has axially gyro‐scale spatial resolution ( Δ Z ∼ 1.1 cm). In the axially elongated new machine, the plasmoid is formed near the mid‐plane with a configuration of two X‐points in the early phase of magnetic reconnection when the initial two flux tubes (merging tokamaks) are still in their respective formation region. The plasmoid is then merged with the major upstream plasmas at the two X‐points, which finally triggers the increment of reconnection speed. © 2020 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.