skip to main content

SciTech ConnectSciTech Connect

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

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.
Authors:
; ; ;  [1] ;  [2] ; ; ;  [3] ; ; ; ; ;  [1]
  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China)
  2. (United States)
  3. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
Publication Date:
OSTI Identifier:
22303609
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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