305 シリカエアロジェルへの宇宙ダストの超高速度衝突に関する実験的研究(セッション3)

概要

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Silica aerogel collectors (density: 0.03 g/cm^3), were impacted at velocities ranging from 1 to 14 km/s with projectiles of aluminum oxide, olivine or soda-lime glass, with diameters ranging from 10 to 400μm. At impact velocities below 6 km/s, the projectiles were captured without fragmentation by the aerogel collector, and in many instances without complete ablation even at 12 km/s. The shapes and dimensions of the penetration tracks left in the aerogel collector were correlated with the impact parameters, and the results permitted derivation of a series of equations relating the track dimensions to incoming projectile size, impact energy and other projectile parameters. A simplified model, similar to meteor entry-phenomena, was used to predict the trends in experimental penetration track lengths and the diameters of captured projectiles.
日本惑星科学会の論文
1999-11-13