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Title: Nonlinear simulations of particle source effects on edge localized mode

The effects of particle source (PS) with different intensities and located positions on Edge Localized Mode (ELM) are systematically studied with BOUT++ code. The results show the ELM size strongly decreases with increasing the PS intensity once the PS is located in the middle or bottom of the pedestal. The effects of PS on ELM depend on the located position of PS. When it is located at the top of the pedestal, peeling-ballooning (P-B) modes can extract more free energy from the pressure gradient and grow up to be a large filament at the initial crash phase and the broadening of mode spectrum can be suppressed by PS, which leads to more energy loss. When it is located in the middle or bottom of the pedestal, the extraction of free energy by P-B modes can be suppressed, and a small filament is generated. During the turbulence transport phase, the broader mode spectrum suppresses the turbulence transport when PS is located in the middle, while the zonal flow plays an important role in damping the turbulence transport when PS is located at the bottom.
Authors:
;  [1] ;  [2] ;  [1] ;  [2] ;  [2] ;  [3]
  1. College of Physical Science and Technology, Sichuan University, Chengdu 610065 (China)
  2. (China)
  3. Southwestern Institute of Physics, Chengdu 610041 (China)
Publication Date:
OSTI Identifier:
22489929
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 12; Other Information: (c) 2015 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; DAMPING; EDGE LOCALIZED MODES; ENERGY LOSSES; FILAMENTS; FREE ENERGY; NONLINEAR PROBLEMS; PARTICLE SOURCES; PRESSURE GRADIENTS; SIMULATION; SPECTRA; TURBULENCE