ESD Triggered Solar Array Failure Mechanism

Details ESD Triggered Solar Array Failure Mechanism ESD Triggered Solar Array Failure Mechanism

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sct..conf...39k&link_type=abstract

Proceedings of the 6th Spacecraft Charging Conference. November 2-6, 1998. AFRL Science Center, Hanscom AFB, MA, USA., p.39-42

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Scientific paper

A mechanism is presented which explains recent anomalies on geosynchronous (GEO) communications satellites. The symptoms of the anomalies are low impedance shorts between high and low voltage cells on a solar array string, and shorts between high voltage cells and the array ground. All of the anomalies occurred when other, instrumented, satellites measured a charging environment. In this paper we present a theory and supporting laboratory data, which show how small, low energy, spacecraft charging electrostatic discharges (ESD) on solar arrays can lead to larger, sustained discharges, which permanently damage the solar arrays. While first observed in GEO, this mechanism can also lead to solar array failures in LEO.

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