Ion thruster having a hollow cathode assembly with an encapsulated heater, and its fabrication
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 8, 2002
Grant Date -
N/A
app pub date -
Feb 2, 2000
filing date -
Feb 2, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ion thruster has a hollow cathode assembly including a heater with an inner ceramic sleeve and an outer ceramic sleeve. The outer ceramic sleeve overlies the inner ceramic sleeve with a filament volume between the two sleeves. A wound filament has windings disposed within the filament volume, and a mass of ceramic powder fills the remaining portion of the filament volume between the windings of the filament. A cathode is disposed within the inner ceramic sleeve of the heater. The heater is assembled by preparing the filament and forming it into a wound cylinder, and then encapsulating it and the powder between the inner and the outer ceramic sleeves. The hollow cathode assembly may serve as a portion of a plasma source or as a portion of a charge neutralizer.
First Claim
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International Classification(s)
- 2000 Application Filing Year
- F03H Class
- 12 Applications Filed
- 6 Patents Issued To-Date
- 50 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 28 Citation Count
- F03H Class
- 66.67 % this patent is cited more than
- 23 Age