Discovery of energetic molecular ions (NO+and O2+) in the storm time ring current
作者:
B. Klecker,
E. Möbius,
D. Hovestadt,
M. Scholer,
G. Gloeckler,
F. M. Ipavich,
期刊:
Geophysical Research Letters
(WILEY Available online 1986)
卷期:
Volume 13,
issue 7
页码: 632-635
ISSN:0094-8276
年代: 1986
DOI:10.1029/GL013i007p00632
数据来源: WILEY
摘要:
A few hours after the onset of a large geomagnetic storm on September 4, 1984, energetic molecular ions in the mass range 28‐32, predominantly NO+and O2+, have been discovered in the outer ring current at L ∼ 7. The data have been obtained with the time‐of‐flight spectrometer SULEICA on the AMPTE/IRM spacecraft. We find at 160 keV/e a mean abundance ratio of the molecular ions relative to O+ions of 0.031±0.004. During quiet times no molecular ions are observed, the 1 σ upper limit of the ratio derived by averaging over several quiet periods is 0.003. The observations demonstrate the injection of ionospheric plasma into the storm time ring current and the subsequent acceleration to energies of several hundred keV on a time scale of a few hours after the onset of the magne
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