Open AccessRole of edge magnetic shear on the limiterH-mode transition of the JIPP T-IIU tokamak
Author(s) -
K. Toi,
K. Kawahata,
S. Morita,
T. Watari,
R. Kumazawa,
K. Ida,
Akira Ando,
Y. Oka,
M. Sakamoto,
Y. Hamada,
K. Adati,
R. Ando,
Takashi Aoki,
S. Hidekuma,
S. Hirokura,
O. Kaneko,
A. Karita,
T. Kawamoto,
Y. Kawasumi,
T. Kuroda,
K. Masai,
K. Narihara,
Yuichi Ogawa,
Κ. Ohkubo,
S. Okajima,
T. Ozaki,
M. Sasao,
K.N. Sato,
T. Seki,
F. Shimpo,
H. Takahashi,
S. Tanahashi,
Y. Taniguchi,
T. Tsuzuki
Publication year - 1990
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.64.1895
Subject(s) - tokamak , limiter , plasma , enhanced data rates for gsm evolution , shear (geology) , materials science , condensed matter physics , electron , atomic physics , electron temperature , current (fluid) , physics , nuclear physics , thermodynamics , composite material , telecommunications , computer science
In a circular cross-section plasma bounded by a limiter, the H-mode transition is triggered by a rapid rampdown in plasma current during auxiliary heating, even in the case when the edge electron temperature gradually decreases prior to the transition. This result suggests that the transition is governed by the enhancement of the magnetic shear near the plasma edge, associated with the radial modification of the edge current-density profile
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