@inproceedings{oai:jaxa.repo.nii.ac.jp:00038376, author = {杉, 紀夫 and 荒川, 政彦 and 香内, 晃 and 前野, 紀一 and Sugi, Norio and Arakawa, Masahiko and Kouchi, Akira and Maeno, Norikazu}, book = {第28回月・惑星シンポジウム, Proceedings of the 28th ISAS Lunar and Planetary Symposium}, month = {Dec}, note = {Impact vaporization of ice was an important physical process in the accretion of icy satellites because this process could cause the varieties of the bulk density of these satellites. Thus, we have developed a new experimental equipment to measure the mass of H2O gas generated from H2O-ice target by the impact vaporization. This equipment contained the electro-magnetic accelerator, ice target and the mass-spectrometer within the ultra-high vacuum chamber; it enables us to measure the quantity and the species of degassing vapors. In the closed vacuum chamber, the copper projectile was launched to the ice target at velocities of 97-142 m/s and the target was cooled at 130 K during the impact. The vapor pressure of H2O increased just after the impact by the impact vaporization of ice. The energy of latent heat required for the observed vaporization corresponded to 8-15 percent of the initial kinetic energy of the impacts., 資料番号: AA0063352009}, pages = {33--36}, publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)}, title = {In situ observations on impact vaporization of water ice}, year = {1995} }