Conference Paper SEDA-AP/重イオン計測装置によるISS軌道での重イオンの観測
Measurements of the SEDA-AP/Heavy Ion Telescope at ISS

上野, 遥  ,  松本, 晴久  ,  古賀, 清一  ,  永松, 愛子  ,  Ueno, Haruka  ,  Matsumoto, Haruhisa  ,  Koga, Kiyokazu  ,  Nagamatsu, Aiko

Space radiation such as solar energetic particles (SEP), galactic cosmic rays (GCR) and trapped particles cause to our space activities. Heavy ions, in particular, have high linear energy transfer (LET), which exacerbates the risks of radiation exposure for astronauts and errors of electric circuits for satellites. The Japan Aerospace Exploration Agency (JAXA) has operated the Space Environment Data Acquisition Equipment-Attached Payload (SEDA-AP), installed at the International Space Station (ISS) Japanese Experiment Module (Kibo) - Exposed Facility, since 2009. The Heavy-Ion Telescope (HIT) is the one of the SEDA-AP instruments, which comprises two position-sensitive silicon detectors and 16 silicon detectors. Based on the ΔE×E particle-identification method, The HIT measures fluxes of energetic ions from Li to Fe and calculates loss of energies for each sensor. The results of the HIT are consistent with the general GCR model and other experiment inside the ISS in terms of abundances of elements and LET distributions. In addition, the HIT might observe heavy ions from a X5.4 solar flare. Also there is a possibility to detect the anomalous cosmic ray (ACR) from the ADEOS observation, but HIT hasn’t observed ACR because of out of sight of the pitch angle or no distribution of ACR exists at 400 km altitude.
会議情報: 第59回宇宙科学技術連合講演会(2015年10月7日-9日. かごしま県民交流センター), 鹿児島市, 鹿児島県
形態: カラー図版あり
Physical characteristics: Original contains color illustrations

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