Selected comparisons among propulsion systems for communications satellites

Free, B.; Huson, Gregory G.

doi:10.2514/6.1972-517

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1972

1978

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“…(1>2) Primary requirements for such thrusters are reliability and durability over many thousands of operating hours. (3,4) Thrust vectoring capability is also desirable for many applications. >8) The final segment of the 9715 hour test is described in a detailed operational history of several thruster and neutralizer parameters.…”

Section: Introductionmentioning

confidence: 99%

A 9700-hour durability test of a five centimeter diameter ion thruster

Nakanishi

Finke

1973

10th Electric Propulsion Conference

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A modified Hughes SIT-5 thruster has been life-tested at the Lewis Research Center. The final 2700 hours of the test are described with a charted history of thruster operating parameters and off-normal events. Performance and operating characteristics were nearly constant throughout the test except for neutralizer heater power requirements and accelerator drain current. A postshutdown inspection revealed sputter erosion of ion chamber components and component flaking of sputtered metal. Several flakes caused beamlet divergence and anomalous grid erosion, causing the test to be terminated. All sputter erosion sources have been identified and promising sputter resistant components are currently being evaluated.

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Section: Introductionmentioning

confidence: 99%