Rosina Rosetta Orbiter Spectrometer for Ion and Neutral Analysis

Details Rosina Rosetta Orbiter Spectrometer for Ion and Neutral Analysis Rosina Rosetta Orbiter Spectrometer for Ion and Neutral Analysis

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007ssrv..128..745b&link_type=abstract

Space Science Reviews, Volume 128, Issue 1-4, pp. 745-801

Computer Science

12

Comet, Coma Composition, Mass Spectrometry, Rosetta

Scientific paper

The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) will answer important questions posed by the mission’s main objectives. After Giotto, this will be the first time the volatile part of a comet will be analyzed in situ. This is a very important investigation, as comets, in contrast to meteorites, have maintained most of the volatiles of the solar nebula. To accomplish the very demanding objectives through all the different phases of the comet’s activity, ROSINA has unprecedented capabilities including very wide mass range (1 to >300 amu), very high mass resolution ( m/Δ m > 3000, i.e. the ability to resolve CO from N2 and 13C from 12CH), very wide dynamic range and high sensitivity, as well as the ability to determine cometary gas velocities, and temperature. ROSINA consists of two mass spectrometers for neutrals and primary ions with complementary capabilities and a pressure sensor. To ensure that absolute gas densities can be determined, each mass spectrometer carries a reservoir of a calibrated gas mixture allowing in-flight calibration. Furthermore, identical flight-spares of all three sensors will serve for detailed analysis of all relevant parameters, in particular the sensitivities for complex organic molecules and their fragmentation patterns in our electron bombardment ion sources.

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