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One-millipound mercury ion thrusterA mercury ion thruster has been developed for efficient operation at the nominal 1-mlb thrust level with a specific impulse of about 3,000 sec and a total power consumption of about 120 W. At a beam voltage of 1,200 V and beam current of 72 mA, the discharge chamber operates with a propellant efficiency of 93.8% at an ion-generation energy of 276 eV/ion. The 8-cm diameter thruster advances proven component technology to assure the capability for thruster operation over an accumulated beam-on time in excess of 20,000 hours with a capability for 10,000 on-off duty cycles. Discharge chamber optimization has combined stable current-voltage characteristics with high performance efficiency by careful placement of the discharge cathode near the location of a magnetic-field zero just upstream of the thruster endplate.
Document ID
19750042502
Document Type
Conference Paper
Authors
Hyman, J., Jr.
Dulgeroff, C. R.
Kami, S.
Williamson, W. S. (Hughes Research Laboratories Malibu, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
March 1, 1975
Subject Category
SPACECRAFT PROPULSION AND POWER
Report/Patent Number
AIAA PAPER 75-386
Meeting Information
American Institute of Aeronautics and Astronautics, Electric Propulsion Conference(New Orleans, LA)
Funding Number(s)
CONTRACT_GRANT: NAS3-18917
CONTRACT_GRANT: NAS3-15523
CONTRACT_GRANT: NAS3-17791
Distribution Limits
Public
Copyright
Other