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The hidden ion population - RevisitedIn an investigation conducted by Olsen (1982) on the basis of particle data taken with an electrostatic analyzer, it was found that a cold plasma population with a density between 10 and 100 per cu cm appeared suddenly when the satellite was eclipsed, but was hidden in sunlight. The present paper has the objective to show further measurements of ordinarily 'hidden' ion populations, in order to resolve some of the questions raised in connection with the Scatha satellite data reported by Olsen. It is found that the retarding ion mass spectrometer (RIMS) detector is capable of measuring the core of the plasma distribution in sunlight and eclipse, though the task is more easily done in eclipse. There are, however, limitations concerning the ability of the detector to measure all the plasma, all the time. It is, therefore, pointed out that continuous effective measurements of the 'hidden' ion population of the magnetosphere still awaits satellites with effective means of potential control.
Document ID
19860039650
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Olsen, R. C.
(Alabama, University Huntsville, United States)
Chappell, C. R.
(Alabama Univ. Huntsville, AL, United States)
Gallagher, D. L.
(Alabama Univ. Huntsville, AL, United States)
Green, J. L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gurnett, D. A.
(Iowa, University Iowa City, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
86A24388
Funding Number(s)
CONTRACT_GRANT: NAS8-33982
CONTRACT_GRANT: NAS5-25690
CONTRACT_GRANT: NSF ATM-83-00426
Distribution Limits
Public
Copyright
Other

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