@inproceedings{oai:jaxa.repo.nii.ac.jp:00020304,
 author = {中村, 昭子 and 長谷川, 直 and 黒澤, 耕介 and 土山, 明 and Okamoto, T. and Nakamura, Akiko M. and Hasegawa, Sunao and Kurosawa, Kosuke and Ikezaki, K. and Tsuchiyama, Akira},
 book = {Proceedings of the 44th ISAS Lunar and Planetary Symposium},
 month = {},
 note = {44th  ISAS Lunar and Planetary Symposium (August 1-3,  2011. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan, Primordial bodies in the solar system, such as planetesimals and comets, are considered to have high porosity. When small bodies or dusts impact those primordial bodies, strength and internal structure, including porosity, of the target bodies should play important roles in the process of penetration. However, the penetration mechanism has not been fully understood yet. We fabricated high-porosity sintered targets consisting of soda-lime acid silicate hollow glass beads. The sintered targets had porosity of about 94 % and the bulk density of ca.0.14 g/cm3. We conducted impact experiments at high velocity at ISAS using a two-stage light-gas gun and a high speed camera. The impact velocities were ca.2.5, 4.0, 7.0km/s. The penetration depth and track morphology are examined by X-ray micro tomography at Osaka University. In order to discuss the penetration depth, we got data of the deceleration of the projectile and consider a model in which the largest fragment of the projectile decelerates due to a drag force proportional to the square of the velocity and determines the track length. Our model roughly reproduces the track length of the experiment., 形態: カラー図版あり, 形態: CD-ROM1枚, Physical characteristics: Original contains color illustrations, Note: One CD-ROM, 資料番号: AA0065390019},
 publisher = {宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS), Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)},
 title = {Experimental Study for Surface Structure of Porous Small Bodies : Dust Penetration Depth},
 volume = {44},
 year = {2011}
}