First insights on the organic species from the high resolution mass spectrometer ROSINA DFMS on-board the Rosetta spacecraft

Abstract : Starting in August 2014, the ROSINA experiment will characterize the composition and dynamics of 67P/Churyumov-Gerasimenko’s coma. ROSINA consists of a suite of three instruments: a pressure sensor (COPS: COmetary Pressure Sensor) and two mass spectrometers: the Reflectron Time of Flight mass spectrometer (RTOF) and the Double Focusing Mass Spectrometer (DFMS). Here we will focus on the first results obtained by DFMS, the high-resolution mass spectrometer of ROSINA. DFMS is a traditional magnetic mass spectrometer that combines an electrostatic analyzer for energy analysis with a magnet for momentum analysis. To date, DFMS is the highest mass resolution mass spectrometer in space, with resolution (m/Δm = 3000 at 1% of the peak height at 28 amu/q). It will be able to resolve CO from N2 at m/z= 28 amu/q or 12CH and 13C at m/z= 13 amu/q. We will present the first results of DFMS: the detection of organic species and their implication for the origin of cometary material.
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Submitted on : Friday, February 13, 2015 - 2:56:57 PM
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  • HAL Id : hal-01116471, version 1

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Léna Le Roy, Kathrin Altwegg, Jean-Jacques Berthelier, Ursina Calmonte, Frederik Dhooghe, et al.. First insights on the organic species from the high resolution mass spectrometer ROSINA DFMS on-board the Rosetta spacecraft. AGU Fall Meeting 2014, Dec 2014, San Francisco, United States. pp.P41C-3927. ⟨hal-01116471⟩

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