Plasma Wave Observations in the Cleft during a Period of Upflowing Ions

Details Plasma Wave Observations in the Cleft during a Period of Upflowing Ions Plasma Wave Observations in the Cleft during a Period of Upflowing Ions

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm41a..04l&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SM41A-04

Physics

2407 Auroral Ionosphere (2704), 2471 Plasma Waves And Instabilities (2772), 6929 Ionospheric Physics (1240, 2400), 6984 Waves In Plasma (7867)

Scientific paper

On Jan 18th , 2008 at 0730 UT a high altitude sounding rocket, SCIFER-2 (Sounding of the Cleft Ion Fountain Energization Region-2), was launched into dayside cusp aurora from Andoya Rocket Range and closely over flew the EISCAT Svalbard Radar (ESR) and the Kjell Henrikson Observatory with an apogee of 1467 km. During flight ESR recorded upwelling ions with a flux of ~20*1012 m-2s-1 and velocity of ~400 m/s at 400 km altitude. Initial results from a 6m VLF wave receiver are presented. Strong wave signatures are observed between 3 kHz and 5 kHz with amplitudes of up to 40 mV/m peak to peak. These waves are roughly ordered by the hydrogen gyrofrequency indicating possible Bernstein mode waves over an altitude range from 1000 km to above 1400 km. Associated with these waves are measured ion populations between 50 and 100eV. At lower frequencies possible broadband ELF waves are observed above 1200 km at amplitudes of up to 20mV/m peak to peak. Additionally, banded waves are observed between 300 Hz and 600 Hz throughout the entire flight, from 300 Km to over 1400 km, with an amplitude of 5-20 mV/m peak to peak.

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