Ion variability at 67P during perihelion: cross-comparison between ROSINA/DFMS and RPC dataset

A. Beth , K. Altwegg , E. Behar , J. L. Burch , C. Carr , A. Eriksson , M. Galand , C. Goetz , P. Henri (1) , K. Heritier , H. Nilsson , E. Odelstad , I. Richter , M. Rubin , Xavier Vallières (1)

1 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace

We propose here a cross-comparison between the observations performed by the mass spectrometer ROSINA/DFMS, which has probed the ion composition during perihelion, and the data from the five RPC sensors which have provided the plasma properties: magnetic field, ion/electron energy, spacecraft potential. The first results have revealed that there is a strong correlation between the ion count rate and composition from ROSINA/DFMS and the spacecraft potential, which affects strongly the measurements. Also, thanks to RPC/MAG, we were able to identify diamagnetic crossings. At these times, we observed a strong increase in the ion count rate from ROSINA/DFMS. We will show further comparisons with other sensors from RPC like IES and ICA.

Domains: Sciences of the Universe [physics]

A. Beth, K. Altwegg, E. Behar, J. L. Burch, C. Carr, et al.. Ion variability at 67P during perihelion: cross-comparison between ROSINA/DFMS and RPC dataset. European Planetary Science Congress 2017, Sep 2017, Riga Latvia, Latvia. ⟨insu-03568104⟩