TY - JOUR
T1 - Radiation background and dose estimates for future X-ray observations in the Jovian magnetosphere
AU - Kasahara, S.
AU - Ezoe, Y.
AU - Kimura, T.
AU - Miyoshi, Y.
N1 - Funding Information:
The authors enjoyed useful discussion with S.V. Badman and appreciate her assistance in editing the manuscript. We are also grateful to the HISCALE team for giving energetic particle data through web sites, which we used to estimate the flux levels in the lobe region. This study is supported by Grants-in-Aid for Scientific Research (23224011) of the Japan Society for the Promotion of Science (JSPS).
PY - 2013/1
Y1 - 2013/1
N2 - 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.
AB - 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.
KW - Jovian magnetosphere
KW - Radiation background
KW - X-ray measurements
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U2 - 10.1016/j.pss.2012.11.009
DO - 10.1016/j.pss.2012.11.009
M3 - Article
AN - SCOPUS:84872489226
VL - 75
SP - 129
EP - 135
JO - Planetary and Space Science
JF - Planetary and Space Science
SN - 0032-0633
IS - 1
ER -