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

Abstract

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.

Authors:
 [1]; ORCiD logo [2];  [1];  [3];  [4];  [5]
  1. Peking Univ., Beijing (China); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Chinese Academy of Sciences, Hefei (China)
  4. General Atomics, San Diego, CA (United States)
  5. NFRI, Daejeon (South Korea). WCI Center for Fusion Theory
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1305894
Alternate Identifier(s):
OSTI ID: 1228617
Report Number(s):
LLNL-JRNL-664403
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:  
AC52-07NA27344; AC52-7NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; collisional energy loss; turbulence simulations; turbulence effects; ion temperature gradient mode; edge localized modes

Citation Formats

Ma, C. H., Xu, X. Q., Xi, P. W., Xia, T. Y., Snyder, P. B., and Kim, S. S. Impact of inward turbulence spreading on energy loss of edge-localized modes. United States: N. p., 2015. Web. doi:10.1063/1.4920963.
Ma, C. H., Xu, X. Q., Xi, P. W., Xia, T. Y., Snyder, P. B., & Kim, S. S. Impact of inward turbulence spreading on energy loss of edge-localized modes. United States. https://doi.org/10.1063/1.4920963
Ma, C. H., Xu, X. Q., Xi, P. W., Xia, T. Y., Snyder, P. B., and Kim, S. S. 2015. "Impact of inward turbulence spreading on energy loss of edge-localized modes". United States. https://doi.org/10.1063/1.4920963. https://www.osti.gov/servlets/purl/1305894.
@article{osti_1305894,
title = {Impact of inward turbulence spreading on energy loss of edge-localized modes},
author = {Ma, C. H. and Xu, X. Q. and Xi, P. W. and Xia, T. Y. and Snyder, P. B. and Kim, S. S.},
abstractNote = {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.},
doi = {10.1063/1.4920963},
url = {https://www.osti.gov/biblio/1305894}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {Mon May 18 00:00:00 EDT 2015},
month = {Mon May 18 00:00:00 EDT 2015}
}

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Cited by: 15 works
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Works referenced in this record:

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Works referencing / citing this record:

Quasi-coherent mode simulation during inter-ELM period in HL-2A
journal, December 2018


Simulations on the transient heat fluxes for the low-hybrid wave heating H-mode on EAST
journal, June 2019


Global kinetic ballooning mode simulations in BOUT++
journal, September 2016


Divertor heat flux simulations in ELMy H-mode discharges of EAST
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Linear analyses of peeling-ballooning modes in high beta pedestal plasmas
journal, August 2018


Study on edge localized mode during plasma vertical swing in HL-2A tokamak
journal, October 2018


Impact of bootstrap current and Landau-fluid closure on ELM crashes and transport
journal, May 2018