Interaction of upgoing auroral H(+) and O(+) beams

Details Interaction of upgoing auroral H(+) and O(+) beams Interaction of upgoing auroral H(+) and O(+) beams

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9110080k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Sept. 1, 1986, p. 10080-10096.

Physics

21

Auroral Electrojets, Auroras, Ion Beams, Plasma Interactions, Electrostatic Waves, Ion Distribution, Ionospheric Ion Density, Space Plasmas, Vertical Distribution, Wave Propagation

Scientific paper

Data from the S3-3 and DE 1 satellites are analyzed to study the interaction between H(+) and O(+) ions in upgoing auroral beams. Every data set analyzed showed some evidence of an interaction. The measured plasma was found to be unstable to a low-frequency electrostatic wave that propagates at an oblique angle to vector-B(0). A second wave, which can propagate parallel to vector-B(0), is weakly damped in the plasma studied in most detail. It is likely that the upgoing ion beams generate this parallel wave at lower altitudes. The resulting wave-particle interactions qualitatively can explain most of the features observed in ion distribution functions.

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