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Title: Simulation of magnetic holes formation in the magnetosheath

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.5003017· OSTI ID:1514861

Magnetic holes have been frequently observed in the Earth's magnetosheath and are believed to be the consequence of the nonlinear evolution of the mirror instability. Mirror mode perturbations mainly form as magnetic holes in regions where the plasma is marginally mirror stable with respect to the linear instability criterion. We present an expanding box particle-in-cell simulation to mimic the changing conditions in the magnetosheath as the plasma is convected through it that produces mirror mode magnetic holes. We show that in the initial nonlinear evolution, where the plasma conditions are mirror unstable, the magnetic peaks are dominant, while later, as the plasma relaxes toward marginal stability, the fluctuations evolve into deep magnetic holes. Finally, while the averaged plasma parameters in the simulation remain close to the mirror instability threshold, the local plasma in the magnetic holes is highly unstable to mirror instability and locally mirror stable in the magnetic peaks.

Research Organization:
Univ. of New Hampshire, Durham, NH (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0006670; PHYS-1229408; TG-MCA98N022
OSTI ID:
1514861
Alternate ID(s):
OSTI ID: 1414881
Journal Information:
Physics of Plasmas, Vol. 24, Issue 12; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (9)

Electron mirror instability: particle-in-cell simulations journal July 2018
Generation of Electron Whistler Waves at the Mirror Mode Magnetic Holes: MMS Observations and PIC Simulation journal August 2018
Electron Dynamics in Magnetosheath Mirror-Mode Structures journal July 2018
First observations of magnetic holes deep within the coma of a comet journal October 2018
MMS Observations of Kinetic-size Magnetic Holes in the Terrestrial Magnetotail Plasma Sheet journal April 2019
Onset and Evolution of the Oblique, Resonant Electron Firehose Instability in the Expanding Solar Wind Plasma journal September 2019
Thermodynamic Properties of Mirror Structures in the Magnetosheath: MMS Observations and Double-polytropic MHD Simulations journal October 2019
Generation of Electron Whistler Waves at the Mirror Mode Magnetic Holes: MMS Observations and PIC Simulation text January 2018
Electron mirror instability: Particle-in-cell simulations text January 2018

Figures / Tables (4)


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