Rapidly Starting Cathode for Electric Propulsion

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$69,980.00
Award Year:
2002
Program:
SBIR
Phase:
Phase I
Contract:
F04611-02-M-0028
Agency Tracking Number:
02-0831
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Busek Co., Inc.
11 Tech Circle, Natick, MA, 01760
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
184629491
Principal Investigator:
Lawrence Byrne
Research Engineer
(508) 655-5565
bpote@busek.com
Business Contact:
Judy Budny
Contracts Administrator
(508) 655-5565
judy@busek.com
Research Institution:
n/a
Abstract
"Busek's tandem Hall thruster can deliver precisely controllable, repetitive or single impulse bits of arbitrary magnitude, the latter dictated by the duration of the discharge pulse. To fully capitalize on the pulsed operation of a Hall thruster requiresa cathode capable of rapid starting to minimize the time from the command for thrust to the time the discharge pulse can be initiated. The most significant delay occurs during the time required to heat the cathode emitter and the time to establishexpellant within the cathode.In the Phase I program Busek will evaluate several methods and approaches to rapidly starting an electron source for the thruster. Approaches to be analytically and experimentally characterized include a derivative of our standard hollow cathode designedfor rapid heating of the emitter insert and novel approaches for heaterless style cathodes.Proof of concept and preliminary experiments will be conducted to determine methods for rapid starting and characteristic turn-on times. The most promising approaches will be further investigated for thermal and discharge cycle capability.In Phase II prototype cathodes will be designed and fabricated for integrated testing with a Hall thruster in the pulsed and steady state operating modes. Busek's low power propulsion system can fulfill all the propulsion requirements of missions requiring orbit raising, repositioning and close proximity formation flying. A rapidly star

* information listed above is at the time of submission.

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