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Charge exchange contamination of CRIT-II barium CIV experimentExperiments have been recently performed which attempted to confirm critical ionization velocity (CIV) ionization by deploying chemicals at high velocity in the ionosphere. Specifically, the CRIT-II rocket performed a barium release in the ionosphere, where observations of Ba(+) resonant emissions following the release are believed to have resulted from the CIV process. Calculations are presented which suggest a significant fraction (if not all) of the Ba(+) observed likely resulted from charge exchange with the thermosphere ions and not through CIV processes. The results presented here are pertinent to other CIV experiments performed in the ionosphere. It is recommended that laboratory measurements should be made of the charge exchange cross section between O(+) and Ba as well as other metal vapors used in CIV experiments.
Document ID
19910046942
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Swenson, G. R.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Mende, S. B.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Meyerott, R. E.
(Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Rairden, R. L.
(Lockheed Research Laboratories Palo Alto, CA, United States)
Date Acquired
August 14, 2013
Publication Date
March 1, 1991
Publication Information
Publication: Geophysical Research Letters
Volume: 18
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
91A31565
Funding Number(s)
CONTRACT_GRANT: NAS8-36630
Distribution Limits
Public
Copyright
Other

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