Fine-Scale Cavitation of Ionospheric Plasma Caused by Inertial Alfvén Wave Ponderomotive Force

Details Fine-Scale Cavitation of Ionospheric Plasma Caused by Inertial Alfvén Wave Ponderomotive Force Fine-Scale Cavitation of Ionospheric Plasma Caused by Inertial Alfvén Wave Ponderomotive Force

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvl..80.3523b&link_type=abstract

Physical Review Letters, Volume 80, Issue 16, April 20, 1998, pp.3523-3526

Physics

47

Scientific paper

Deep, very narrow magnetic-field-aligned density depletions were observed by the Freja spacecraft during auroral oval crossings. These cavities have perpendicular width of the order of the electron skin depth c/ωpe and are associated with low-frequency electromagnetic perturbations and with discrete auroral structures. We demonstrate here that these cavities are likely produced by the ponderomotive force of inertial Alfvén waves.

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