2.4.0 spase://CNES/Instrument/CDPP-Archive/VEX/ASPERA4/IMA Venus Express ASPERA-4 Ion Mass Analyzer 2022-06-06T18:10:08Z The Ion Mass Analyzer (IMA) of the ASPERA-4 package flown on Venus Express provides ion measurements in the energy range 0.01 - 36 keV/q for the main ion components H+, H2+, He+, O+, and for the group of molecular ions with M/q ration between 20 and 80 amu/e. IMA has a 90 deg x 360 deg field of view. Electrostatic sweeping performs elevation (+/- 45 deg) coverage. The IMA sensor is a spherical electrostatic analyzer followed by a circular magnetic separating section. A large diameter MCP with a discrete anode images the matrix azimuth x mass. Reference: Barabash et al., The Analyser of Space Plasmas and Energetic Atoms (ASPERA-4) for the Venus Express mission, Planetary and Space Science, Volume 55, Issue 12, 2007, Pages 1772-1792, ISSN 0032-0633, https://doi.org/10.1016/j.pss.2007.01.014. spase://CNES/Person/CDPP-Archive/Stas.Barabash PrincipalInvestigator PSA ASPERA web page ftp://psa.esac.esa.int/pub/mirror/VENUS-EXPRESS/ASPERA4/VEX-V-SW-ASPERA-2-ELS-V1.0/CATALOG/INST.CAT RetardingPotentialAnalyser Venus Express ASPERA4 IMA spase://CNES/Observatory/CDPP-Archive/VEX