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Title: Momentum transport and nonlocality in heat-flux-driven magnetic reconnection in high-energy-density plasmas

Abstract

Recent theory has demonstrated a novel physics regime for magnetic reconnection in high-energy-density plasmas where the magnetic field is advected by heat flux via the Nernst effect. In this paper, we elucidate the physics of the electron dissipation layer in this regime. Through fully kinetic simulation and a generalized Ohm's law derived from first principles, we show that momentum transport due to a nonlocal effect, the heat-flux-viscosity, provides the dissipation mechanism for magnetic reconnection. Scaling analysis, and simulations show that the reconnection process comprises a magnetic field compression stage and quasisteady reconnection stage, and the characteristic width of the current sheet in this regime is several electron mean-free paths. Finally, these results show the important interplay between nonlocal transport effects and generation of anisotropic components to the distribution function.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences; Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Lancaster Univ. (United Kingdom). Dept. of Physics; Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences
  5. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Nuclear Engineering and Radiological Sciences; Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States); Univ. of Michigan, Ann Arbor, MI (United States); Univ. of California, Los Angeles, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
OSTI Identifier:
1399478
Alternate Identifier(s):
OSTI ID: 1398295
Grant/Contract Number:  
AC02-05CH11231; AC05-00OR22725; SC0008655; SC0010621; SC0016249; NA0002953; ACI-1339893
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 96; 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; high intensity laser-plasma interactions; magnetic reconnection; plasma transport; particle-in-cell methods; plasma physics

Citation Formats

Liu, Chang, Fox, William, Bhattacharjee, Amitava, Thomas, Alexander G. R., and Joglekar, Archis S. Momentum transport and nonlocality in heat-flux-driven magnetic reconnection in high-energy-density plasmas. United States: N. p., 2017. Web. doi:10.1103/PhysRevE.96.043203.
Liu, Chang, Fox, William, Bhattacharjee, Amitava, Thomas, Alexander G. R., & Joglekar, Archis S. Momentum transport and nonlocality in heat-flux-driven magnetic reconnection in high-energy-density plasmas. United States. doi:10.1103/PhysRevE.96.043203.
Liu, Chang, Fox, William, Bhattacharjee, Amitava, Thomas, Alexander G. R., and Joglekar, Archis S. Fri . "Momentum transport and nonlocality in heat-flux-driven magnetic reconnection in high-energy-density plasmas". United States. doi:10.1103/PhysRevE.96.043203. https://www.osti.gov/servlets/purl/1399478.
@article{osti_1399478,
title = {Momentum transport and nonlocality in heat-flux-driven magnetic reconnection in high-energy-density plasmas},
author = {Liu, Chang and Fox, William and Bhattacharjee, Amitava and Thomas, Alexander G. R. and Joglekar, Archis S.},
abstractNote = {Recent theory has demonstrated a novel physics regime for magnetic reconnection in high-energy-density plasmas where the magnetic field is advected by heat flux via the Nernst effect. In this paper, we elucidate the physics of the electron dissipation layer in this regime. Through fully kinetic simulation and a generalized Ohm's law derived from first principles, we show that momentum transport due to a nonlocal effect, the heat-flux-viscosity, provides the dissipation mechanism for magnetic reconnection. Scaling analysis, and simulations show that the reconnection process comprises a magnetic field compression stage and quasisteady reconnection stage, and the characteristic width of the current sheet in this regime is several electron mean-free paths. Finally, these results show the important interplay between nonlocal transport effects and generation of anisotropic components to the distribution function.},
doi = {10.1103/PhysRevE.96.043203},
journal = {Physical Review E},
number = 4,
volume = 96,
place = {United States},
year = {2017},
month = {10}
}

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