Ring-cusp ion thruster with shell anode

Details Ring-cusp ion thruster with shell anode Ring-cusp ion thruster with shell anode

1983-03-09

1984-08-21

Casaregola, Louis J.

Power plants

Reaction motor

Ion motor

F03H 500

Patent

active

044662424

ABSTRACT:
An improved ion thruster (10) for low specific impulse operation in the 1500 sec to 6000 sec range has a multicusp boundary field (48) provided by high strength magnets (30-38) on an iron anode shell (14) which lengthens the paths of electrons from a hollow cathode assembly (20). A downstream anode pole piece in the form of an iron ring (40) supports a ring of magnets (44) to provide a more uniform beam profile. A cylindrical cathode magnet (46) can be moved selectively in an axial direction along a feed tube (22) to produce the desired magnetic field at the cathode tip (24).

REFERENCES:
patent: 2892114 (1959-06-01), Kilpatrich
patent: 3156090 (1964-11-01), Kaufman
patent: 3209189 (1965-09-01), Patrick
patent: 3290541 (1966-12-01), Hertz
patent: 3620018 (1971-11-01), Banks
patent: 3735591 (1973-05-01), Burkhart
patent: 3969646 (1976-07-01), Reader et al.
Beattie et al., Cusped Magnetic Field Mercury Ion Thruster, Journal of Spacecraft and Rockets, vol. 14, No. 12, Dec. 1977.
"Magneto-Electrostatically Contained Plasma Ton Thruster"-by R. D. Moore; AIAA Paper No. 69-260; AIAA 7th Electric Propulsion Conference; Williamsburg, VA; Mar. 3-5, 1969.

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