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.

*U.S DOE DE-SC0020413

Presenters

  • Javier H Nicolau

    • University of California, Irvine

Authors

  • Javier H Nicolau

    • University of California, Irvine

  • Zhihong Lin

    • University of California, Irvine
    • University of California, Irvine, US

  • Gyungjin Choi

    • Seoul National University, Korea
    • Seoul National University

  • Tyler B Cote

    • General Atomics

  • Dmitriy M Orlov

    • University of California, San Diego

  • Jong-Kyu Park

    • Princeton Plasma Physics Laboratory
    • Princeton Plasma Physics Laboratory, U.S.A.
    • PPPL

  • Eric Howell

    • Tech-X Corporation

  • SeongMoo Yang

    • Princeton Plasma Physics Laboratory
    • Princeton Plasma Physics Laboratory, U.S.A.
    • PPPL

  • SangKyeun Kim

    • Princeton University
    • Princeton University, U.S.A.
    • PPPL
    • PU