Modulation of auroral field-aligned electron fluxes under two inverted-V structures at different altitudes

Details Modulation of auroral field-aligned electron fluxes under two inverted-V structures at different altitudes Modulation of auroral field-aligned electron fluxes under two inverted-V structures at different altitudes

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29j..70t&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 10, pp. 70-1, CiteID 1428, DOI 10.1029/2001GL013719

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Ionosphere: Particle Precipitation, Ionosphere: Auroral Ionosphere (2704), Ionosphere: Wave/Particle Interactions, Ionosphere: Particle Acceleration

Scientific paper

This paper presents observations of field-aligned electron flux bursts from the auroral sounding rocket flight, Alaska 2000, launched February 25, 2000 from Poker Flat, Alaska. In one particular energetic electron burst, the field-aligned electron flux is observed to be modulated at 22-30 Hz at energies up to 30 keV. By assuming that the observed energy dispersion in the bursts is caused by time-of-flight effects, we obtain characteristic source altitudes of 87 dispersive electron bursts, and find that the average characteristic source altitude of the bursts is 4015 +/- 684 km in the first inverted-V and 5411 +/- 972 km in the second inverted-V. This result implies that the electron-wave or other interaction depends more strongly on which arc it occurs in, rather than another factor such as energy of the electrons, since dispersive bursts at a wide range of energies and durations were used to arrive at the result.

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