Correcting peak deformation in Rosetta's ROSINA/DFMS mass spectrometer

Johan de Keyser (1) , Frederik Dhooghe (1) , Andrew Gibbons (1) , Kathrin Altwegg (2) , Hans Balsiger (2) , Jean-Jacques Berthelier (3) , Christelle Briois (4) , Ursina Calmonte (2) , Gaël Cessateur (1) , Eddy Equeter (1) , Björn Fiethe (5) , Stephen Fuselier (6) , Tamas Gombosi (7) , Herbert Gunell (1) , Myrttha Hässig (2) , Léna Le Roy (2) , Romain Maggiolo (1) , Eddy Neefs (1) , Martin Rubin (2) , Thierry Sémon (2)

1 BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique
2 Physikalisches Institut [Bern]
3 PLANETO - LATMOS
4 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
5 IDA - Institute of Computer and Network Engineering [Braunschweig]
6 SwRI - Southwest Research Institute [San Antonio]
7 AOSS - Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor]

The Double Focusing Mass Spectrometer (DFMS), part of the ROSINA instrument package aboard the European Space Agency's Rosetta spacecraft visiting comet 67P/Churyumov-Gerasimenko, experiences minor deformation of the mass peaks in the high resolution spectra acquired for m/Z = 16, 17, and to a lesser extent 18. A numerical deconvolution technique has been developed with a two-fold purpose. A first goal is to verify whether the most likely cause of the issue, a lack of stability of one of the electric potentials in the electrostatic analyser, can indeed be held responsible for it. The second goal is to correct for the deformation, in view of the important species located around these masses, and to allow a standard further treatment of the spectra in the automated DFMS data processing chain.

Domains: Sciences of the Universe [physics]

Johan de Keyser, Frederik Dhooghe, Andrew Gibbons, Kathrin Altwegg, Hans Balsiger, et al.. Correcting peak deformation in Rosetta's ROSINA/DFMS mass spectrometer. EGU General Assembly 2016, Apr 2016, Vienna, Austria. ⟨insu-03573537⟩