dosimetry measurement, space shuttle, RRMD, realtime radiation monitoring device, dose equivalent, GCR, galactic cosmic ray particle, quality factor, heavy particle beam, South Atlantic Anomaly, LET, linear energy transfer, space experiment, microgravity, effect on living organisms
その他のタイトル（英）
Dosimetry measurement of heavy particle beam in a space shuttle and investigation of its effect on living organisms (Radiation): Dosimetry measurement of heavy particle beam
早稲田大学 理工学総合研究センター
早稲田大学 理工学総合研究センター
早稲田大学 理工学総合研究センター
愛媛大学 教養学部
NASA Johnson Space Center
宇宙開発事業団 筑波宇宙センター
宇宙開発事業団 筑波宇宙センター
著者所属（英）
Waseda University Advanced Research Center for Science and Engineering
Waseda University Advanced Research Center for Science and Engineering
Waseda University Advanced Research Center for Science and Engineering
Ehime University Faculty of General Education
NASA Johnson Space Center
National Space Development Agency of Japan Tsukuba Space Center
National Space Development Agency of Japan Tsukuba Space Center
出版者
宇宙開発事業団
出版者（英）
National Space Development Agency of Japan (NASDA)
The space radiation dosimetry measurements have been made on board the Space Shuttle STS-65 (IML-2; inclination 28.5 deg, altitude 300 km). In these measurements, three kinds of detectors were used; a newly developed silicon detector telescope (active detector) called 'Real time Radiation Monitoring Device (RRMD)' and conventional passive detectors of Thermal Luminescence Dosimetry (TLDs) and CR-39 track detectors. Using RRMD, the first attempt of real time monitoring of space radiation has been achieved successfully for continuous 251.3 hr. The RRMD results indicate that a clear enhancement of the number of trapped particles is seen at the South Atlantic Anomaly (SAA) without clear enhancement of dose equivalent, while some daily periodic enhancements of dose equivalent due to high LET (Linear Energy Transfer) particles are seen at the smaller geomagnetic cutoff regions for Galactic Cosmic Ray particles (GCRs), which are main contribution to dose equivalent in this low altitude mission (300 km). Also, the rates of dose equivalents obtained by TLDs and CR-39 ranged from 146.9 to 165.2 micro Sv/day and the average quality factors from 1.45 to 1.57 depending on the locations and directions inside the Space-Lab at the mission of 28.5 deg x 300 km. The LET distributions obtained by RRMD and CR-39, are in good agreement in the region of 15 to 200 keV/micrometer and difference of these distributions in the region of LET less than 15 keV/micrometer and LET greater than 200 keV/micrometer can be explained by considering characteristics of CR-39 track formation, especially for the low LET tracks.
宇宙船内における重粒子線による線量計測とその生物効果実験(RADIATION):重粒子線による線量計測
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