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The L equals 6.7 quiet time barium shaped charge injection experiment 'Chachalaca'Near dawn on October 9, 1972, UT, a barium plasma injection experiment was carried out from Poker Flat, Alaska, during quiet magnetic conditions (Kp equals 1+). The visible plasma flux tube produced was more diffuse than the flux tubes in previous experiments, but it could be tracked for 30 min out to an altitude of 2.5 earth radii. The flux tube remained integral for about 20 min, when a single striation separated from the main streak. Comparisons of the observed flux tube orientation with theoretical field models show no significant deviations ascribable to field-aligned currents. Cross-field drift rates of the foot of the flux tube indicate an E field of approximately 7 mV/m at 200-km altitude. Although an attempt was made via a jet aircraft flight, barium ions were not detected in the southern conjugate region. No energetic particle precipitation phenomena were observed which could be ascribed to the barium plasma injection.
Document ID
19750054197
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wescott, E. M.
Stenbaek-Nielsen, H. C.
Davis, T. N.
(Alaska, University Fairbanks, Alaska, United States)
Rieger, E. P.
(Alaska, University Fairbanks, Alaska; Max-Planck-Institut fuer Physik und Astrophysik, Garching, Germany)
Peek, H. M.
Bottoms, P. J.
(California, University Los Alamos, N. Mex., United States)
Date Acquired
August 8, 2013
Publication Date
July 1, 1975
Publication Information
Publication: Journal of Geophysical Research
Volume: 80
Subject Category
Geophysics
Accession Number
75A38269
Funding Number(s)
CONTRACT_GRANT: NGR-02-001-088
CONTRACT_GRANT: NGR-02-001-087
Distribution Limits
Public
Copyright
Other

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