[P-PS02] Regolith Science

[PPS02-P04] サイズ分布を持つ粉体への衝突によって発生する放出物分布のパターン

*門野 敏彦¹、鈴木 絢子²、末次 竜³、嶌生 有理⁴、長谷川 直⁴ (1.産業医科大学医学部、2.東洋大学経済学部、3.大島商船高等専門学校、4.宇宙科学研究所)

キーワード：衝突、サイズ分布を持つ粉体ターゲット、放出物

We conducted impact experiments using targets composed of particles with size distributions and projectiles with a size larger than or comparable with the maximum size of particles in targets. The pattern and particle concentration in the ejecta curtain were investigated. The results show three types of ejecta curtain features: (i) filament pattern extending throughout the entire curtain and high concentration, (ii) filament pattern and low concentration, and (iii) mesh-like pattern with a structure on smaller scales than the entire curtain and low concentration. When the target consists of particles using a bimodal size distribution with size differences of more than one order of magnitude, the filament pattern appears, exhibiting case (i). If the target consists of particles with various sizes with size differences of more than one order of magnitude, the filament pattern appears, but the concentration decreases, appearing the features of case (ii). Case (iii) occurs when the target consists of particles with a single size or when the mass of particles with a certain size is dominant.