Abstract

The conducted and radiated emission of electromagnetic noise from an ion engine system was measured. The measured data were compared with MIL-STD-461A and a specification for the ion engine system on ETS-III, and found to satisfy the latter specification. During the conducted emission measurements, three discharge modes were observed and their oscillating characteristics were compared. An ion acoustic wave was generated spontaneously during a low discharge voltage mode. A relatively narrow discharge voltage range was found to minimize the noise.

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