Abstract
The performance of laser ablation propulsion using fine particles made of polyacetal is investigated. We expected that the absorption efficiency of fine particles was better than one of bulk. 2 sizes of fine particles were used. The momentum coupling coefficient (C_m) and mass loss were measured. The C_m of small, fine particles is larger than one of bulk. Due to fine particles splashing, the mass loss of fine particles was more than 10^2 times larger than that of bulk. In order to decrease the splashed mass, the fine particles were bonded with hydraulic compression. The C_m of compacted fine particles was comparable to that of bulk target.
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