Laboratory Studies of Hydrogen Ion Chemistry

Details Laboratory Studies of Hydrogen Ion Chemistry Laboratory Studies of Hydrogen Ion Chemistry

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.1906c&link_type=abstract

American Astronomical Society Meeting 210, #19.06; Bulletin of the American Astronomical Society, Vol. 39, p.120

Astronomy and Astrophysics

Astronomy

Scientific paper

We have combined a simple time-of-flight (TOF) mass spectrometer in tandem with a cylindrical rf ion trap to monitor the temporal evolution of an ion population as it reacts with a neutral gas buffer following an electron impact interval which is used to create the ions. At precisely determined times following electron impact, the stored ions are extracted from the trap into a 76-cm flight path terminated by an active-film detector. An analysis of the TOF spectra as a function of the extraction time and neutral gas pressure can yield relevant collision-rate coefficients for modeling of solar, stellar, planetary, inter-planetary, and early universe plasmas. Measurements are being carried out to study collisions of H+ and H2 by monitoring the loss of protons from the trap, and to study the rapid reaction of H2+ with H2 to produce H3+, by simultaneously monitoring the loss of H2+ and growth of H3+.
Supported in part by NSF Grant No. AST-04-06706 to ASU and, for DWS and MS, NASA Grant No. NAG5-5420 and NSF Grant No. AST-03-07203 to CU, respectively.

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