The burst structure of the AKR

Details The burst structure of the AKR The burst structure of the AKR

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm33a2142m&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM33A-2142

Physics

[2704] Magnetospheric Physics / Auroral Phenomena

Scientific paper

Auroral kilometric radiation (AKR) consists of very intense sporadic bursts of electromagnetic emissions with peak intensities in the frequency range from about 100 to 300 kHz. AKR is generated as a result of the cyclotron maser instability developing at altitudes between 2000 and 10000 km mainly in the evening and night time auroral zones. We present results of the analysis of quasiperiodic AKR bursts obtained by the INTERBALL-2 satellite. The burst structure of the AKR consists of some splashes and has duration of tens minutes (~30-50 minutes). Each splash has duration ~ 360-600 seconds. Intensity of splashes suddenly increases over a wide frequency range. Such burst structure is observed at invariant latitudes ~ 65°-70° in the evening and night sectors of a magnetosphere. Two mechanisms of formation of burst structure are possible. Based on our measurements we carry out their comparative analysis.

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