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Ion cyclotron waves in the Io plasma torus - Polarization reversal of whistler mode noiseBecause of the presence of multiple ion species in the Io plasma torus, whistler mode noise can be converted to ion cyclotron waves via a polarization reversal process at the local crossover frequency. Using whistler mode intensity measurements in the Jovian magnetosphere from Voyager 1, the pitch-angle diffusion rates that would occur if the noise is converted to ion cyclotron waves is estimated. Typical pitch-angle diffusion coefficients range from 0.000001/sec for protons resonating near the equator to 0.0001/sec for 10-keV O(+) ions resonating at high latitudes. Although complete bounce averaged diffusion coefficients have not yet been computed, preliminary estimates indicate that the energetic ion precipitation caused by these waves may be able to account for the EUV auroral emissions at the foot of the torus field lines.
Document ID
19830059912
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gurnett, D. A.
(Iowa Univ. Iowa City, IA, United States)
Goertz, C. K.
(Iowa, University Iowa City, IA, United States)
Date Acquired
August 11, 2013
Publication Date
July 1, 1983
Publication Information
Publication: Geophysical Research Letters
Volume: 10
ISSN: 0094-8276
Subject Category
Lunar And Planetary Exploration
Accession Number
83A41130
Funding Number(s)
CONTRACT_GRANT: JPL-954013
CONTRACT_GRANT: NGL-16-001-002
CONTRACT_GRANT: NSF ATM-81-11126
CONTRACT_GRANT: NAGW-337
CONTRACT_GRANT: NGL-16-001-043
CONTRACT_GRANT: NSG-7632
CONTRACT_GRANT: JPL-956108
Distribution Limits
Public
Copyright
Other

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