Radiation background and dose estimates for future X-ray observations in the Jovian magnetosphere

S. Kasahara, Y. Ezoe, T. Kimura, Y. Miyoshi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The Jovian magnetosphere is the most luminous system at soft X-ray wave lengths in our solar system, and hence X-ray observations can provide significant information on the Jovian magnetospheric dynamics. During X-ray observations in the Jovian magnetosphere, however, penetrating particles can hit the detector, resulting in the background noise and radiation damage. Here we consider an X-ray telescope instrument (0.3-2 keV) on board a future Jovian magnetospheric spacecraft and estimate the count rates and dose rates by the high-energy particles for the design of the instrument. Based on Monte-Carlo simulations with Geant4 codes, we confirmed that good signal-to-noise ratio (0.5-500) and negligible dose rate (<0.1krad/year) can be accomplished during observations in the lobe (i.e.; the region where magnetic field lines are open), which would be achieved by the high-inclination orbit of the spacecraft.

Original languageEnglish
Pages (from-to)129-135
Number of pages7
JournalPlanetary and Space Science
Volume75
Issue number1
DOIs
Publication statusPublished - 2013 Jan 1
Externally publishedYes

Keywords

  • Jovian magnetosphere
  • Radiation background
  • X-ray measurements

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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