Building and testing of MIDAS instrument sub-assemblies

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Scientific paper

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Rosetta, Midas Instrument

Scientific paper

The MIDAS instrument is an atomic force microscope developed by ESTEC to fly on Rosetta. The purpose of the instrument is to sample and characterise cometary dust, which impinges upon a facetted wheel contained within the instrument enclosure. Due to its relative complexity, the long cruise phase of the Rosetta mission and the relatively novel use of piezomotors for all drive requirements the instrument has a number of interesting mechanisms engineering challenges. This paper describes the lubricant selection, EM and FM subassembly build and test campaigns carried out by AEA Technology Space in close support of the instrumentlevel activities which ran in parallel at ESTEC. The paper also identifies some lessons learned, which can be generally applied in other mechanism programmes.

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