Interplay between fluctuation driven toroidal axisymmetric flows and resistive ballooning mode turbulence

Seto, H.; Xu, X. Q.; Dudson, B. D.; Yagi, M.

doi:10.1063/1.5086998

Title: Interplay between fluctuation driven toroidal axisymmetric flows and resistive ballooning mode turbulence

Journal Article · Tue May 14 00:00:00 EDT 2019 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5086998· OSTI ID:1568015

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National Institutes for Quantum and Radiological Science and Technology, Aomori (Japan)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of York, York (United Kingdom)

An interplay between fluctuation driven toroidal axisymmetric flows (convective cell modes) and resistive ballooning mode turbulence after the pedestal collapse is numerically studied by a four-field reduced MHD model in the BOUT++ framework. The strong flow shear suppresses the radial transport of pressure filaments, and the pressure profile in the pedestal region is partially recovered. As a result, a secondary instability is quasilinearly excited, which yields a secondary collapse. Here, the subsequent damped oscillation is also analyzed by phase diagram analysis.

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

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1568015

Alternate ID(s):: OSTI ID: 1512547

Report Number(s):: LLNL-JRNL-789211; 987556; TRN: US2100255

Journal Information:: Physics of Plasmas, Vol. 26, Issue 5; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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