Attempt to identify a source mechanism of Mercury's sodium exosphere by a spectrometer using Fabry-Perot etalon

I. Yoshikawa, S. Kameda, K. Hikosaka, G. Murakami, D. Rees, H. Nozawa, Shouichi Okano, O. Korablev

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The Mercury's Sodium Atmosphere Spectral Imager (MSASI) on BepiColombo (BC) will address a range of fundamental scientific questions pertaining to Mercury's exosphere. The measurements will provide new information on regolith-exosphere-magnetosphere coupling as well as new understanding of the dynamics governing the exosphere bounded by the planetary surface, the solar wind and interplanetary space. MSASI is a high-dispersion visible spectrometer working in the spectral range around sodium D2 emission (589 nm). A tandem Fabry-Perot etalon is used to achieve a compact design. We presents a design of the spectral analyzer using Fabry-Perot interferometer. We conclude that: (1) The MSASI optical design is practical and can be implemented without new or critical technology developments; (2) The thermally-tuned etalon design is based on concepts, designs and materials that have good space heritage.

Original languageEnglish
Pages (from-to)1172-1179
Number of pages8
JournalAdvances in Space Research
Volume42
Issue number7
DOIs
Publication statusPublished - 2008 Oct 1

Keywords

  • BepiColombo
  • Fabry-Perot
  • Mercury's exosphere
  • Sodium exosphere

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)

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