B4 衝突誘起高密度プラズマによる太陽電池アレイ上の持続放電発生条件

概要

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A solar-array paddle has a high probability of a space-debris impact because it has a large area. The space-debris impact on the solar array causes not only mechanical damage but also electrical damage such as solar-array arcing through the local high-density plasma created by hypervelocity impact. In the worst case, Joule heating of the arcing carbonizes an insulation layer, and a permanent short-circuit path is created. This is permanent sustained arc (PSA). However, no PSA caused by space-debris impact in orbit has been reported. This paper evaluates the possibility of PSA caused by debris impact. Hypervelocity-impact tests on solar-array coupons in the condition of pseudo power generation were conducted. We ascertained that a space-debris impact could lead to PSA on the solar array.
社団法人日本機械学会の論文
2009-01-23