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

Ma, C. H.; Xi, P. W.; Xu, X. Q.; Xia, T. Y.; Snyder, P. B.; Kim, S. S.

doi:10.1063/1.4920963

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

Journal Article · Fri May 15 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4920963· OSTI ID:22410380

Ma, C. H.; Xi, P. W. ^[1]; Xu, X. Q. ^[2]; Xia, T. Y. ^[2]; Snyder, P. B. ^[3]; Kim, S. S. ^[4]

Fusion Simulation Center and State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing (China)
Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
General Atomics, San Diego, California 92186 (United States)
WCI Center for Fusion Theory, NFRI, Daejeon (Korea, Republic of)

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.

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OSTI ID:: 22410380

Journal Information:: Physics of Plasmas, Vol. 22, Issue 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X

Country of Publication:: United States

Language:: English

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