New Spacecraft-Charging Solar Array Failure Mechanism

Details New Spacecraft-Charging Solar Array Failure Mechanism New Spacecraft-Charging Solar Array Failure Mechanism

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sct..conf..297s&link_type=abstract

Proceedings of the 6th Spacecraft Charging Conference. November 2-6, 1998. AFRL Science Center, Hanscom AFB, MA, USA., p.297-301

Astronomy and Astrophysics

Astrophysics

Scientific paper

Although arcing due to spacecraft charging has been known for some twenty years, and mitigation strategies have been used to prevent it, it is now known that initial arcs can lead to potentially catastrophic continuous arcs between adjacent solar cells or electrical traces. First discovered by the Loral Tempo spacecraft, this phenomenon has now also been verified in laboratory testing for the LEO EOS-AM solar arrays, which are currently being modified to prevent such occurrences on orbit. This paper will show laboratory results on mechanisms, risky configurations, and thresholds in voltages, separations, and currents as determined by vacuum plasma testing at the NASA Lewis Research Center. Mitigation strategies will also be discussed.

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