Three dimensional nonlinear simulations of edge localized modes on the EAST tokamak using BOUT++ code

Journal Article · Mon Sep 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4895799· OSTI ID:22303609

Xia, T. Y.; Liu, S. C.; Ding, S. Y. ^[1]; Xu, X. Q.; Joseph, I.; Meyer, W. H. ^[2]; Gao, X.; Xu, G. S.; Shao, L. M.; Li, G. Q.; Li, J. G. ^[1]

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1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

Experimental measurements of edge localized modes (ELMs) observed on the EAST experiment are compared to linear and nonlinear theoretical simulations of peeling-ballooning modes using the BOUT++ code. Simulations predict that the dominant toroidal mode number of the ELM instability becomes larger for lower current, which is consistent with the mode structure captured with visible light using an optical CCD camera. The poloidal mode number of the simulated pressure perturbation shows good agreement with the filamentary structure observed by the camera. The nonlinear simulation is also consistent with the experimentally measured energy loss during an ELM crash and with the radial speed of ELM effluxes measured using a gas puffing imaging diagnostic.

• OSTI ID: 22303609
• Journal Information: Physics of Plasmas, Vol. 21, Issue 9; 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

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BALLOONING INSTABILITY
CAMERAS
COMPARATIVE EVALUATIONS
CURRENTS
EDGE LOCALIZED MODES
ENERGY LOSSES
HT-7U TOKAMAK
NONLINEAR PROBLEMS
PERTURBATION THEORY
SIMULATION
THREE-DIMENSIONAL CALCULATIONS