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

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

doi:10.1063/1.4920963

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

Journal Article · Mon May 18 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4920963· OSTI ID:1305894

Ma, C. H. ^[1]; ^[2]; Xi, P. W. ^[1]; Xia, T. Y. ^[3]; Snyder, P. B. ^[4]; Kim, S. S. ^[5]

Peking Univ., Beijing (China); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Chinese Academy of Sciences, Hefei (China)
General Atomics, San Diego, CA (United States)
NFRI, Daejeon (South Korea). WCI Center for Fusion Theory

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 turbulencetransport 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. As a result, 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.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1305894

Alternate ID(s):: OSTI ID: 1228617
OSTI ID: 22410380

Report Number(s):: LLNL-JRNL--664403

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 22; ISSN PHPAEN; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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