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Effects of electron temperature anisotropy on proton mirror instability evolution

Journal Article · · Journal of Geophysical Research. Space Physics
DOI:https://doi.org/10.1002/2016JA022429· OSTI ID:1469339
 [1];  [2];  [2]
  1. Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics; Department of Physics, University of New Hampshire, Durham, New Hampshire
  2. Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics. Space Science Center
+ Show Author Affiliations
Proton mirror modes are large amplitude nonpropagating structures frequently observed in the magnetosheath. It has been suggested that electron temperature anisotropy can enhance the proton mirror instability growth rate while leaving the proton cyclotron instability largely unaffected, therefore causing the proton mirror instability to dominate the proton cyclotron instability in Earth's magnetosheath. In this paper we use particle-in-cell simulations to investigate the electron temperature anisotropy effects on proton mirror instability evolution. Contrary to the hypothesis, electron temperature anisotropy leads to excitement of the electron whistler instability. Finally, our results show that the electron whistler instability grows much faster than the proton mirror instability and quickly consumes the electron-free energy so that there is no electron temperature anisotropy left to significantly impact the evolution of the proton mirror instability.
Research Organization:
Univ. of New Hampshire, Durham, NH (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); National Science Foundation (NSF) (United States)
Grant/Contract Number:
SC0006670
OSTI ID:
1469339
Alternate ID(s):
OSTI ID: 1402319
Journal Information:
Journal of Geophysical Research. Space Physics, Journal Name: Journal of Geophysical Research. Space Physics Journal Issue: 6 Vol. 121; ISSN 2169-9380
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Comment on “Effects of electron temperature anisotropy on proton mirror instability evolution” by Ahmadi et al. (2016) journal January 2017
Reply to comment by Remya et al. on “Effects of electron temperature anisotropy on proton mirror instability evolution” journal January 2017
Effects of Thermal Fluctuations on Temperature Anisotropy Instabilities in the Solar Wind journal November 2018
Quasilinear approach of the cumulative whistler instability in fast solar wind: Constraints of electron temperature anisotropy journal July 2019
Two-dimensional Nonlinear Simulations of Temperature-anisotropy Instabilities with a Proton-alpha Drift journal April 2018
Mirror and Proton-cyclotron Instabilities Coexisting with Ambient Turbulence in a Proton–Alpha Plasma journal January 2020
Quasilinear approach of the cumulative whistler instability in fast solar winds: Constraints of electron temperature anisotropy text January 2019

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
temperature anisotropy instabilities
wave-particle interactions