Title: MARS-F/K modeling of plasma response and fast ion losses due to RMP in KSTAR

Abstract

Abstract The toroidal single-fluid magnetohydrodynamic (MHD) code MARS-F (Liu et al 2000 Phys. Plasmas   7 3681) and the MHD-kinetic hybrid code MARS-K (Liu et al 2008 Phys. Plasmas   15 112503) are utilized to study the plasma response to the n  = 1 ( n is the toroidal mode number) resonant magnetic perturbation (RMP), applied to suppress the type-I edge localized mode (ELM) in a KSTAR discharge. Both the resistive-rotating and ideal-static plasma models identify strong screening of the resonant radial field harmonics of the applied RMP due to the plasma response, and predict a strong edge-peeling response of the plasma which is consistent with the optimal ELM control coil current configuration adopted in experiment. The RMP-induced radial displacement of the plasma, computed by the resistive-rotating plasma model, agrees reasonably well with that reconstructed from the measured data in the plasma core. Taking into account the drift kinetic response of fast ions, MARS-K hybrid modeling also finds quantitative agreement of the plasma core fluid pressure perturbation with experiment. Based on the MARS-F computed plasma response, a guiding-center orbit-tracing simulation finds about 0.3% of fast ion losses due the n  = 1 RMP in the KSTAR ELM control experiment considered. Most lossesmore » are associated with counter-current fast ions located near the plasma edge.« less

Authors:

Liu, Yueqiang ;

• Search DOE PAGES for author "Liu, Yueqiang"
• Search DOE PAGES for ORCID "0000-0002-8192-8411"

Yang, S. M. ;

• Search DOE PAGES for author "Yang, S. M."
• Search DOE PAGES for ORCID "0000-0003-1214-1268"

Kang, J. S. ;

• Search DOE PAGES for author "Kang, J. S."
• Search DOE PAGES for ORCID "0000-0002-9845-4646"

Van Blarcum, J.; Choi, M. J. ;

• Search DOE PAGES for author "Choi, M. J."
• Search DOE PAGES for ORCID "0000-0002-2825-6484"

Frerichs, H. ;

• Search DOE PAGES for author "Frerichs, H."
• Search DOE PAGES for ORCID "0000-0002-3527-5106"

Kim, S. K.

• Search DOE PAGES for author "Kim, S. K."
• Search DOE PAGES for ORCID "0000-0002-0701-8962"

Publication Date:

Fri Mar 15 00:00:00 EDT 2024

Research Org.:

General Atomics, San Diego, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Fusion Energy Sciences (FES)

OSTI Identifier:

2324664

Alternate Identifier(s):

OSTI ID: 2318587; OSTI ID: 2323286

Grant/Contract Number:  

SC0020298; FC02-04ER54698; FG02-95ER54309

Resource Type:

Published Article

Journal Name:

Nuclear Fusion

Additional Journal Information:

Journal Name: Nuclear Fusion Journal Volume: 64 Journal Issue: 5; Journal ID: ISSN 0029-5515

Publisher:

IOP Publishing

Country of Publication:

IAEA

Language:

English

Subject:

70 PLASMA PHYSICS AND FUSION TECHNOLOGY; resonant magnetic perturbation; plasma response; fast ion losses; KSTAR