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Tearing Instability in Alfvén and Kinetic-Alfvén Turbulence

Journal Article · · Journal of Geophysical Research. Space Physics
DOI:https://doi.org/10.1029/2020ja028185· OSTI ID:1802862
 [1];  [2]
  1. University of Wisconsin‐Madison, WI (United States). Department of Physics; Center for Space Plasma Physics Space Science Institute, Boulder, CO (United States).; OSTI
  2. Plasma Science and Fusion Center Massachusetts Institute of Technology, MA (United States)
Recently, it has been realized that magnetic plasma turbulence and magnetic field reconnection are inherently related phenomena. Turbulent fluctuations generate regions of sheared magnetic field that become unstable to the tearing instability and reconnection, thus modifying turbulence at the corresponding scales. In this contribution, we give a brief review of some recent results on tearing-mediated magnetic turbulence. We illustrate the main ideas of this rapidly developing field of study by concentrating on two important examples—magnetohydrodynamic Alfvén turbulence and small-scale kinetic-Alfvén turbulence. Due to various potential applications of these phenomena in space physics and astrophysics, we specifically try not to overload the text by heavy analytical derivations but rather present a qualitative discussion accessible to a non-expert in the theories of turbulence and reconnection.
Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0016215; SC0018266
OSTI ID:
1802862
Alternate ID(s):
OSTI ID: 1664572
Journal Information:
Journal of Geophysical Research. Space Physics, Journal Name: Journal of Geophysical Research. Space Physics Journal Issue: 9 Vol. 125; ISSN 2169-9380
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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