Estimates of magnetospheric solar wind charge exchange events detectable with GEO-X

Daiki Ishi; Yuichiro Ezoe; Ralf C. Boden; Yoshizumi Miyoshi; Kumi Ishikawa; Hiroshi Nakajima; Ikuyuki Mitsuishi; Masaki Numazawa; Yuki Satoh

doi:10.1117/12.3017781

21 August 2024 Estimates of magnetospheric solar wind charge exchange events detectable with GEO-X

Daiki Ishi, Yuichiro Ezoe, Ralf C. Boden, Yoshizumi Miyoshi, Kumi Ishikawa, Hiroshi Nakajima, Ikuyuki Mitsuishi, Masaki Numazawa, Yuki Satoh

Author Affiliations +

Proceedings Volume 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray; 130937C (2024) https://doi.org/10.1117/12.3017781
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The number of magnetospheric solar wind charge exchange (SWCX) soft X-ray events detectable with GEO-X was estimated using the latest calibrated ACE/SWICS data on solar wind O⁷⁺ ions. The O_VIIline flux at a certain solar wind O⁷⁺ flux was calculated from an magnetohydrodynamic simulation of 2001 March 31 geomagnetic storm and scaled to the sum of emission lines from other solar wind ions based on Suzaku magnetospheric SWCX events. The instrumental background including radiation noise mainly due to energetic protons was estimated using GOES >10 MeV proton flux and our previously developed GEANT4 simulation. The number of detectable magnetospheric SWCX events that meet a criterion of signal-to-noise ratios grater than 20 peaks near solar maximum, reaching 49.7 events per year with an average duration of 2.94 hours. Assuming an observation efficiency of 30%, we found that at least one event can be detected within a 4-month time frame with a 90% probability.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Daiki Ishi, Yuichiro Ezoe, Ralf C. Boden, Yoshizumi Miyoshi, Kumi Ishikawa, Hiroshi Nakajima, Ikuyuki Mitsuishi, Masaki Numazawa, and Yuki Satoh "Estimates of magnetospheric solar wind charge exchange events detectable with GEO-X", Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 130937C (21 August 2024); https://doi.org/10.1117/12.3017781

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