Accession Number:

ADA179972

Title:

A Search for the Plasma Processes Associated with Perpendicular Ion Heating.

Descriptive Note:

Final technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB

Personal Author(s):

Report Date:

1987-02-17

Pagination or Media Count:

31.0

Abstract:

The satellite S3-3 data set has been examined for examples of perpendicular ion acceleration with simultaneous broadband plasma wave data. One event was found. Plasma waves in the frequency range for lower hybrid resonance LHR waves and in the frequency range for Doppler shifted O ion cyclotron waves modestly correlated with the perpendicular ion acceleration, although their electric field amplitudes were less than that assumed in present theories of ion acceleration about 0.2-6.0 mVm rms for the LHR waves and 4-9 mVm rms for the possible Doppler shifted O cyclotron waves. Plasma waves propagating above the LHR frequency briefly reached a value of 10 mVm rms. No evidence was found for the existence of H cyclotron waves during the period of perpendicular ion acceleration. The thermal or superthermal electron field-aligned current density Ee 170 eV, estimated by subtracting the current density measured by the electron spectrometer from that measured by the magnetrometer, correlated very well with the period of perpendicular ion acceleration. Keywords Aurora Ion cyclotron waves Ion heating Lower hybrid, wave particle interactions.

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE