Production and detection of hydrated cluster ions in laboratory plasma mimicking ionospheric D region

Details Production and detection of hydrated cluster ions in laboratory plasma mimicking ionospheric D region Production and detection of hydrated cluster ions in laboratory plasma mimicking ionospheric D region

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3113802s&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 13, CiteID L13802

Physics

Plasma Physics

Atmospheric Composition And Structure: Ion Chemistry Of The Atmosphere (2419, 2427), Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Ionosphere: Ion Chemistry And Composition (0335), Space Plasma Physics: Laboratory Studies

Scientific paper

A mixture of NO and water vapor was ionized inside a chamber using an EUV source to produce cluster ions. Ion-cluster formation started within a minute but the time for attaining peak concentration for different ions varied from 1 min to 40 min. New findings here are (a) the detection of higher order clusters of proton and NO+ hydrates (109+, 127+ and 102+) and (b) that the concentration of most of the hydrated ions showed oscillatory behavior. Other positive ions detected were 33+, 54+, 66+, 71+, 76+, 83+, 86+, 93+, 94+, 112+, 117+, 131+ (with high concentration) and 19+, 29+ and 37+ (with low concentrations). Effect of lower and upper thresholds of chamber pressure, for the production of cluster ions was observed. These pressure thresholds correspond to an altitude range of 50 to 100 km in the ionosphere, where cluster ions have been observed.

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