Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 58 / Number 1 / Pages 194-199
Y. Narushima, K. Y. Watanabe, Y. Suzuki, S. Sakakibara, K. Ida, K. Narihara, N. Ohyabu, LHD Experiment Group
Fusion Science and Technology / Volume 58 / Number 1 / Pages 194-199
Format:electronic copy (download)
Spontaneous dynamics of magnetic islands depending on various plasma parameters in the Large Helical Device (LHD) are described. The structure of the magnetic island undergoes deformation during a discharge. There are two states of magnetic island; they are the growth and self-healing of the magnetic island. The self-healing occurs in the higher-beta and lower-collisionality plasmas. The magnetic island, on the other hand, grows in the lower-beta and higher-collisionality region. The self-healing phenomenon is realized by the disappearance of the local flattening of the Te profile and the perturbed magnetic field structure compensating the externally imposed perturbation field to produce a seed magnetic island.
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