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Ion Velocity and Electron Temperature Inside and Around the Diamagnetic Cavity of Comet 67P

André, M.; Henri, P.; Rubin, M. +7 more

A major point of interest in cometary plasma physics has been the diamagnetic cavity, an unmagnetized region in the innermost part of the coma. Here we combine Langmuir and Mutual Impedance Probe measurements to investigate ion velocities and electron temperatures in the diamagnetic cavity of comet 67P, probed by the Rosetta spacecraft. We find io…

Microchannel Plate Efficiency to Detect Low Velocity Dust Impacts

James, David; Horányi, Mihály; Clark, George +2 more

Recent space experiments suggest that electron and ion energy analyzers using microchannel plates (MCPs) as detectors are also registering direct hits by nanodust particles. To allow the analysis and interpretation of these putative dust events, the detection efficiency of MCPs has to be characterized. We report on a series of experiments to inves…