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Lower Hybrid Drift Waves During Guide Field Reconnection

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1029/2020gl087192· OSTI ID:1814564
 [1];  [2];  [3];  [4];  [5];  [5];  [6];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Utah State Univ., Logan, UT (United States)
  3. Univ. of Rochester, NY (United States)
  4. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  5. Princeton Univ., NJ (United States)
  6. Harbin Institute of Technology (China)

Generation and propagation of lower hybrid drift wave (LHDW) near the electron diffusion region (EDR) during guide field reconnection at the magnetopause is studied with data from the Magnetospheric Multiscale mission and a theoretical model. Inside the current sheet, the electron beta (βe) determines which type of LHDW is excited. Inside the EDR, where the electron beta is high (βe ~5), the long-wavelength electromagnetic LHDW is observed propagating obliquely to the local magnetic field. In contrast, the short-wavelength electrostatic LHDW, propagating nearly perpendicular to the magnetic field, is observed slightly away from the EDR, where βe is small (~0.6). These observed LHDW features are explained by a local theoretical model, including effects from the electron temperature anisotropy, finite electron heat flux, electrostatics, and parallel current. The short-wavelength LHDW is capable of generating significant drag force between electrons and ions.

Research Organization:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-09CH11466; SC0016278; FG02-04ER54746; FG02-00ER54585
OSTI ID:
1814564
Alternate ID(s):
OSTI ID: 1786826
Journal Information:
Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 21 Vol. 47; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

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Lower Hybrid Drift Waves During Guide Field Reconnection dataset January 2021

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