Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm13a0339s&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM13A-0339
Physics
2194 Instruments And Techniques, 2494 Instruments And Techniques, 2794 Instruments And Techniques, 5494 Instruments And Techniques, 6994 Instruments And Techniques (1241)
Scientific paper
Between 10 and 100 tons of meteoric material enter the Earth's atmosphere every day. The evaporated material is believed to be distributed over a variety of particle sizes from individual atoms to smoke or small dust particles. The Utah State University Space Dynamics Laboratory has been developing a small (15 by 8 cm cylindrical), compact, time-of-flight ion mass spectrometer suitable for examining evaporated material which becomes charged in the lower ionosphere. The instrument is based on a cross-correlation technique known as Hadamard transform time-of-flight mass spectrometry. Through pseudo-random beam modulation this technique allows for the on-axis coupling of a continuous ion source to a time-of-flight mass analyzer with very high duty cycles. Ion beam modulation (i.e. chopping) is accomplished with a Bradbury-Nielsen gate. The instrument analysis shows that a mass-to-charge range of 1-6000 m/z can be achieved with unit mass resolution at the low end of the mass range.
Dyer Justin S.
Swenson Charles Merrill
Syrstad E.
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