Other
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9213513s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Dec. 1, 1987, p. 13513-13521.
Other
16
Ion Cyclotron Radiation, Ion Temperature, Ionospheric Heating, Magnetic Storms, Pitch (Inclination), Plasmasphere, Electric Fields, Radiant Flux Density
Scientific paper
This paper presents a theoretical model for the anisotropies of the thermal and superthermal ions observed along the field lines in the depleted plasmasphere. The model involves perpendicular ion heating by a low-level plasma turbulence extended along the field lines. It is shown that an extended background plasma noise with intensities of about 10 to the -11th V-squared/sq m per Hz near the ion cyclotron frequency (or near other characteristic frequencies at which ion interaction is possible) can trap the ions in the flux tubes without an appreciable energization. Such weakly heated ions can be effective in refilling the plasmasphere with cold plasmas having characteristic energies of about 1 eV. When the turbulence level exceeds the above level of noise, the heated ions show the features of the ion conics in the superthermal energy range observed along the field lines of refilling.
Hwang K. S.
Singh Nagendra
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