We discuss the appearance of an anode current transient which persists a maximum of 500 seconds and results in a 50% increase in the anode current during initial start-up following exposure to ambient laboratory conditions. The anode current transient is characterized by 18 kHz main discharge on/off behavior. This contrasts with the steady state behavior of a strong DC component overlaid with a low amplitude 25 kHz component. Conduction through ...
Radiated electric fields were measured from a BHT-200 Hall thruster from 10 kHz to 18 GHz following MIL-STD 461E (RE102) specifications. The thruster, operated by a laboratory power supply, was located in a fiberglass vacuum tank that was enclosed in a shielded semi-anechoic room. The measurements were made for discharge potentials of 225, 250, 275, and 300 volts and anode flow rates of 0.80 0.90, 0.94, and 1.0 mg/s (150-240 ...
For the purpose of either orbit raising and/or repositioning the Hall thruster must be capable of delivering sufficient thrust to minimize transfer time. This coupled with the increasing on-board electric power capacity of military and commercial satellites, requires a high power Hall thruster that can provide high thrust for orbit transfer in addition to high Isp for station keeping. To satisfy these requirements, Busek Co. embarked on the development of ...
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