@inproceedings{oai:jaxa.repo.nii.ac.jp:00013940,
 author = {吹田, 義一 and 莨谷, 英司 and 杉山, 智志 and 寺嶋, 昇 and 佃, 芳行 and 藤澤, 正一郎 and 今川, 吉郎 and Suita, Yoshikazu and Tabakodani, Eiji and Sugiyama, Satoshi and Terajima, Noboru and Tsukuda, Yoshiyuki and Fujisawa, Shoichiro and Imagawa, Kichiro},
 book = {宇宙利用シンポジウム　第19回　平成14年度, Space Utilization Research: Proceedings of the Nineteenth Space Utilization Symposium},
 month = {Feb},
 note = {An ultra high vacuum laser diode welding(UHVLDW) system in which a laser diode (LD) welding can be performed in the ISS orbital pressure 10(exp -5) Pa was developed for investigating the effect of an environmental pressure on a LD welding phenomenon. The LD welding experiments with power density around 100 kW/cm(sup 2) were conducted on 304 stainless steel in pressure levels between 10(exp 5) Pa and 10(exp -5) Pa. Although a laser-induced plasma plume is observed during welding in the environmental pressure 10(exp 5) Pa and 10(exp 3) Pa, no laser-induced plasma plume is found in the pressure ranging 10 Pa to 10(exp -5) Pa. A formation of melting process (weld pool shape) with this experimental condition is a keyhole melting type or a transition melting type in the environmental pressure 10(exp 5) Pa and 10(exp 3) Pa. But, a melting process in the pressure lower than 10 Pa changes to a heat conduction melting type. The penetration depth showed a decrease with the environmental pressure down to 10(exp 3) Pa and then appears to no change in a pressure lower than 10 Pa. To establish a space LD welding technology needs to develop a suppression technology of a metal vapor deposition to an optical device., 資料番号: AA0045438033},
 pages = {109--112},
 publisher = {宇宙科学研究所, The Institute of Space and Astronautical Science (ISAS)},
 title = {ISS軌道圧力での半導体レーザ溶接実験},
 year = {2003}
}