Development Of VUV Detectors For BepiColombo Mission

Details Development Of VUV Detectors For BepiColombo Mission Development Of VUV Detectors For BepiColombo Mission

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.p51a0897y&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #P51A-0897

Other

5405 Atmospheres (0343, 1060), 5410 Composition (1060, 3672), 6235 Mercury, 6297 Instruments And Techniques

Scientific paper

Mariner 10 UV measurements_@and telescopic optical spectroscopy from Earth identified six elements (Ca, Na, K, H, He, and O) in the vicinity of the Mercury. Other species are expected e.g. H2, OH, and some noble gasses (Ar, Ne, and Xe). All species representative of the surface composition, directly produced by sputtering from the regolith should also be present. To bring out the composition of Mercury atmosphere more properly, the PHEBUS instrument on Mercury planetary orbiter (MPO) will explore Mercury. It uses up-to-date technologies to achieve minimum mass and power. A consortium composed of three main partners implements it. Japan will provide the detectors, IKI (Russia) will implement the scanning system, and SA/IPSL (France) will take in charge of the integration and electronics. We are now developing compact detector system sensitive to VUV airglow emissions of Mercury. We employ Micro channel plate (MCP) assemblies as photon detectors. In order to enhance quantum efficiencies, photocathodes are deposited on the surface of MCPs. We keep the photocathodes in a vacuum device to prevent the efficiency from degradation. In this paper, we will show the current status of our hardware development.

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