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Title: Impact of inward turbulence spreading on energy loss of edge-localized modes

Nonlinear two-fluid and gyrofluid simulations show that an edge localized modes (ELM) crash has two phases: fast initial crash of ion temperature perturbation on the Alfvén time scale and slow turbulence spreading. The turbulence transport phase is a slow encroachment of electron temperature perturbation due to the ELM event into pedestal region. Because of the inward turbulence spreading effect, the energy loss of an ELM decreases when density pedestal height increases. The Landau resonance yields the different cross phase-shift of ions and electrons. A 3 + 1 gyro-Landau-fluid model is implemented in BOUT++ framework. The gyrofluid simulations show that the kinetic effects have stabilizing effects on the ideal ballooning mode and the energy loss increases with the pedestal height.
Authors:
;  [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Fusion Simulation Center and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing (China)
  2. (United States)
  3. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  4. (China)
  5. General Atomics, San Diego, California 92186 (United States)
  6. WCI Center for Fusion Theory, NFRI, Daejeon (Korea, Republic of)
Publication Date:
OSTI Identifier:
22410380
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; 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; ALFVEN WAVES; BALLOONING INSTABILITY; DISTURBANCES; EDGE LOCALIZED MODES; ELECTRON TEMPERATURE; ENERGY LOSSES; ION TEMPERATURE; LANDAU LIQUID HELIUM THEORY; NONLINEAR PROBLEMS; PHASE SHIFT; PLASMA SIMULATION; RESONANCE; TURBULENCE