The lower hybrid drift instability at the magnetopause

Details The lower hybrid drift instability at the magnetopause The lower hybrid drift instability at the magnetopause

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.7378g&link_type=abstract

Journal of Geophysical Research, vol. 84, Dec. 1, 1979, p. 7378-7381. Research sponsored by the U.S. Department of Energy.

Physics

19

Cosmic Plasma, Magnetopause, Magnetospheric Instability, Magnetospheric Electron Density

Scientific paper

Observations from Imp 6 and ISEE 1 and 2 regarding plasma data on the structure of the magnetopause (MP) and fluctuation data at the MP are used to study the lower hybrid drift instability (LHDI). The linear dispersion relation for a Vlasov plasma is drawn on to help explain the observed significant gradients in plasma density and temperature, as well as strong changes in the direction of B at the MP, and it is assumed that only perpendicular density gradients of scale length 1/epsilon(sub n) are present, and that the electrostatic approximation is valid. It is demonstrated that the LHDI is the most likely source of field fluctuations observed between 1 and 100 Hz at the MP. In addition, there is evidence that the magnetic fluctuations are not necessarily due to the whistler mode, but may well be due to the electromagnetic component of the LHDI.

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