Effects of magnetic islands on drift wave instability

Holod, I.; Xiao, C.

doi:10.1063/1.4903910

Title: Effects of magnetic islands on drift wave instability

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4903910· OSTI ID:22403358

Holod, I. ^[1]; Xiao, C. ^[2]

Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
Fusion Simulation Center and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 (China)

Magnetic islands have been implemented in the gyrokinetic toroidal code to study the effects of the islands on microturbulence. The pressure profile flattening is verified in the simulation with the islands. Simulations of ion temperature gradient instability find that different toroidal modes are linearly coupled together and that toroidal spectra become broader when the island width increases. The real frequencies and growth rates of different toroidal modes approach each other with the averaged value independent of the island width. The linear mode structures are enhanced at the island separatrices and weakened at the island centers, consistent with the flattening of the pressure profile inside the islands.

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OSTI ID:: 22403358

Journal Information:: Physics of Plasmas, Vol. 21, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X

Country of Publication:: United States

Language:: English

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Effects of magnetic islands on bootstrap current in toroidal plasmas Dong, G.; Lin, Z. Nuclear Fusion, Vol. 57, Issue 3 https://doi.org/10.1088/1741-4326/57/3/036009	journal	December 2016
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