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21 November 2017 Probing of Hermean exosphere by ultraviolet spectroscopy: preliminary calibration results of an ultraviolet spectrometer
Nicolas Rouanet, Jean Francois Mariscal, Jean-Luc Maria, Pierre-Olivier Mine, Ichiro Yoshikawa, Kazuo Yoshioka, Go Murakami, Victor Gnedykh, Piergiorgio Nicolosi, Sébastien Gallet, Jean-Baptiste Rigal, Eric Quemerais, François Leblanc, Eric Chassefiere, Jean-Pierre Goutail
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Proceedings Volume 10566, International Conference on Space Optics — ICSO 2008; 105662F (2017) https://doi.org/10.1117/12.2308210
Event: International Conference on Space Optics 2008, 2008, Toulouse, France
Abstract
PHEBUS (Probing of Hermean Exosphere by Ultraviolet Spectroscopy) is a double ultraviolet spectrometer for the MPO (Mercury Planetary Orbiter) of the ESA BepiColombo cornerstone mission, which is dedicated to the study of Mercury. The goal of this instrument is to detect emission lines of Mercury exosphere in the bandwidth between 55 to 315 nm by recording full spectra. The instrument is basically composed of two ultraviolet spectrophotometers and one scanning mirror with a single axis of rotation. This movable mirror will collect the light coming from the exosphere above the limb onto the entrance slit of the spectrometers. The mirror is protected from straylight by an entrance baffle characterized by a good rejection capability. Each detector has a specific range of wavelengths: the EUV (Extreme UV) channel spreads from 55 to 155 nm, and the FUV (Far UV) channel from 145 to 315 nm. A couple of photomultipliers receive two additional wavelengths in the Near UV range (NUV) at 404 and 422 nm.
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Nicolas Rouanet, Jean Francois Mariscal, Jean-Luc Maria, Pierre-Olivier Mine, Ichiro Yoshikawa, Kazuo Yoshioka, Go Murakami, Victor Gnedykh, Piergiorgio Nicolosi, Sébastien Gallet, Jean-Baptiste Rigal, Eric Quemerais, François Leblanc, Eric Chassefiere, and Jean-Pierre Goutail "Probing of Hermean exosphere by ultraviolet spectroscopy: preliminary calibration results of an ultraviolet spectrometer", Proc. SPIE 10566, International Conference on Space Optics — ICSO 2008, 105662F (21 November 2017); https://doi.org/10.1117/12.2308210
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KEYWORDS
Calibration
Sensors
Extreme ultraviolet
Mirrors
Exosphere
Ultraviolet radiation
Photomultipliers
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