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SCATHA observations of space plasma composition during a spacecraft charging eventDuring an Earth eclipse of the SCATHA spacecraft, the spacecraft charged to potentials greater than 1KV for about 30 minutes with extended excursions greater than 4KV. The composition of the hot plasma was obtained in the 0.1 to 32 keV energy range with an ion mass spectrometer aboard the spacecraft. Prior to the onset of the charging event, H(+) was the principal plasma ion, and during the event O(+) was the principal ion. The composition was energy dependent and varied significantly on a time scale of 4 minutes. An assumption that the ion flux was all H(+) led to computed number densities that were in error by more than a factor of two for several time intervals during the event.
Document ID
19820006369
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Johnson, R. G.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Strangeway, R.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Kaye, S.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Sharp, R.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Shelley, E.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1980
Publication Information
Publication: NASA. Lewis Research Center Spacecraft Charging Technol. 1980
Subject Category
Spacecraft Design, Testing And Performance
Accession Number
82N14242
Funding Number(s)
CONTRACT_GRANT: N00014-76-C-0444
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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