@misc{oai:repo.qst.go.jp:00063055,
 author = {Kodaira, Satoshi and Yasuda, Nakahiro and Uchihori, Yukio and Kitamura, Hisashi and Kurano, Mieko and Kawashima, Hajime and et.al and 小平 聡 and 安田 仲宏 and 内堀 幸夫 and 北村 尚 and 蔵野 美恵子 and 川嶋 元},
 month = {Feb},
 note = {We conducted the radiation monitoring experiment for passive radiation dosimeters as a part of the BRADOS experiment on the International Space Station (ISS) in 2004. Five dosimeters boxes with passive detectors from IMBP and NIRS were exposed on the Russian segment of the ISS during the period of the BRADOS II space experiment sessions from Jan. 29 to Oct. 24 in 2004. The dosimeter package consists of LiF TLDs, Glass detectors and CR-39 detectors with some Al targets. In this study, we employed CR-39 detector named HARZLAS TD-1 and verified the variation of LET spectra by several bulk etch conditions (multi-step) from 5 - 53 m at the same position of a TD-1 detector. All etch pit was traced at each step of etching time as shown in Figure. Many high LET particles with short range are observed in the CR-39 detector, which are considered to be produced by target fragmentation reaction with high energy proton. They make a significant dose effect in inner body (e.g. bone consisting of Ca). In this talk, the preliminary results on variation of dose quantities obtained by the CR-39 detector will be presented., The 2nd International Open Laboratory Workshop  on Challenges in the New Frontier in Space Travel: Physics and  Biology of Radiation Risk},
 title = {Contribution of high LET components originated from target fragmentation reaction on space radiation dosimetry},
 year = {2009}
}