Gyrokinteic simulations of microturbulent transport in KSTAR in the presence of magnetic islands
POSTER
Abstract
Gyrokinetic simulations of microturbulence in the presence of island in KSTAR are presented. Magnetic islands generated by RMP coils are included in the equilibirum plasma which is obtained from M3DC1 MHD simulations of discharge 19118. Global gyrokinetic simulations using the GTC code are perfomed including kinetic electrons. ITG turbuelnce is observed during the simulated time. Linear analysis indicates a simlar growth rate, frequency and spectrum of the ITG instability when the islands are artificially removed. Nonlinear simulations are indiciating as well similar overall transport levels. However, larger transport levels are observed near the X points of the island compared to the O points. The generation of a vortex mode with the same structure of the magnetic island is observed.
Presenters
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Javier H Nicolau
University of California, Irvine
Authors
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Javier H Nicolau
University of California, Irvine
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Zhihong Lin
University of California, Irvine, University of California, Irvine, US
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Gyungjin Choi
Seoul National University, Korea, Seoul National University
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Tyler B Cote
General Atomics
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Dmitriy M Orlov
University of California, San Diego
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Jong-Kyu Park
Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory, U.S.A., PPPL
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Eric Howell
Tech-X Corporation
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SeongMoo Yang
Princeton Plasma Physics Laboratory, Princeton Plasma Physics Laboratory, U.S.A., PPPL
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SangKyeun Kim
Princeton University, Princeton University, U.S.A., PPPL, PU