Abstract
The fabrication of an ultralow-density hydrophobic silica aerogel for the intact capture cosmic dust during the Tanpopo mission is described. The Tanpopo experiment performed on the International Space Station orbiting the Earth includes the collection of terrestrial and interplanetary dust samples on a silica aerogel capture medium exposed to space for later ground-based biological and chemical analyses. The key to the mission’s success is the development of high-performance capture media, and the major challenge is to satisfy the mechanical requirements as a spacecraft payload while maximizing the performance for intact capture. To this end, an ultralow-density (0.01 g cm−3) soft aerogel was employed in combination with a relatively robust 0.03 g cm−3 aerogel. A procedure was also established for the mass production of double-layer aerogel tiles formed with a 0.01 g cm−3 surface layer and a 0.03 g cm−3 open-topped, box-shaped base layer, and 60 aerogel tiles were manufactured. The fabricated aerogel tiles have been demonstrated to be suitable as flight hardware with respect to both scientific and safety requirements.
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Acknowledgments
The authors are grateful to the members of the Tanpopo Collaboration and Prof. I. Adachi of the High Energy Accelerator Research Organization (KEK) in Japan for their assistance with the aerogel design, development, and fabrication. This study was supported in part by the Space Plasma Laboratory at ISAS, JAXA, and we would like to thank Dr. S. Hasegawa and the crew for their two-stage light-gas gun operation.
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Tabata, M., Kawai, H., Yano, H. et al. Ultralow-density double-layer silica aerogel fabrication for the intact capture of cosmic dust in low-Earth orbits. J Sol-Gel Sci Technol 77, 325–334 (2016). https://doi.org/10.1007/s10971-015-3857-3
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DOI: https://doi.org/10.1007/s10971-015-3857-3