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When: Monday, October 29, 2012 4:30 PM - 5:30 PM
Where: Computer & Space Science : Coffee, Tea & Cookies 4:15-4:30 PM : 2400
Event Type(s): Seminar

Joseph Westlake, JHU/APL
The Composition of Titan¹s Ionospheric Outflow: Mass Resolved INMS Observations of Exospheric Ions From the T40 Flyby

We report on Cassini Ion and Neutral Mass Spectrometer (INMS) observations above Titan's exobase at altitudes of 2225 km to 3034 km. During the January 2008 T40 Cassini flyby of Titan the Ion and Neutral Mass Spectrometer (INMS) serendipitously observed nonthermal, exospheric ions. This is the first mass-resolved observation of Titan¹s exospheric ions. We observe significant densities of CH5+, HCNH+ and C2H5+ that require ion-molecule reactions to be produced in the quantities observed. During the observation the Cassini spacecraft was executing a roll causing the INMS to observe several locations in velocity space. Ions are observed with velocities of about 1 km/s.

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