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Title: Spontaneous transport barriers quench turbulent resistivity in two-dimensional magnetohydrodynamics

Abstract

This Rapid Communication identifies the physical mechanism for the quench of turbulent resistivity in two-dimensional magnetohydrodynamics. Without an imposed, ordered magnetic field, a multiscale, blob-and-barrier structure of magnetic potential forms spontaneously. Magnetic energy is concentrated in thin, linear barriers, located at the interstices between blobs. The barriers quench the transport and kinematic decay of magnetic energy. The local transport bifurcation underlying barrier formation is linked to the inverse cascade of $$\langle$$A$$^{2}$$$\rangle$$ and negative resistivity, which induce local bistability. For small-scale forcing, spontaneous layering of the magnetic potential occurs, with barriers located at the interstices between layers. This structure is effectively a magnetic staircase.

Authors:
 [1]; ORCiD logo [1];  [2]
  1. Univ. of California, San Diego, CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1509686
Alternate Identifier(s):
OSTI ID: 1509760
Grant/Contract Number:  
FG02-04ER54738
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 99; Journal Issue: 4; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Fan, Xiang, Diamond, P. H., and Chacón, L. Spontaneous transport barriers quench turbulent resistivity in two-dimensional magnetohydrodynamics. United States: N. p., 2019. Web. doi:10.1103/PhysRevE.99.041201.
Fan, Xiang, Diamond, P. H., & Chacón, L. Spontaneous transport barriers quench turbulent resistivity in two-dimensional magnetohydrodynamics. United States. doi:10.1103/PhysRevE.99.041201.
Fan, Xiang, Diamond, P. H., and Chacón, L. Mon . "Spontaneous transport barriers quench turbulent resistivity in two-dimensional magnetohydrodynamics". United States. doi:10.1103/PhysRevE.99.041201. https://www.osti.gov/servlets/purl/1509686.
@article{osti_1509686,
title = {Spontaneous transport barriers quench turbulent resistivity in two-dimensional magnetohydrodynamics},
author = {Fan, Xiang and Diamond, P. H. and Chacón, L.},
abstractNote = {This Rapid Communication identifies the physical mechanism for the quench of turbulent resistivity in two-dimensional magnetohydrodynamics. Without an imposed, ordered magnetic field, a multiscale, blob-and-barrier structure of magnetic potential forms spontaneously. Magnetic energy is concentrated in thin, linear barriers, located at the interstices between blobs. The barriers quench the transport and kinematic decay of magnetic energy. The local transport bifurcation underlying barrier formation is linked to the inverse cascade of $\langle$A$^{2}$$\rangle$ and negative resistivity, which induce local bistability. For small-scale forcing, spontaneous layering of the magnetic potential occurs, with barriers located at the interstices between layers. This structure is effectively a magnetic staircase.},
doi = {10.1103/PhysRevE.99.041201},
journal = {Physical Review E},
number = 4,
volume = 99,
place = {United States},
year = {2019},
month = {4}
}

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