Compact Induced Current Hall Thruster

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F49620-03-C-0076
Agency Tracking Number: F033-0100
Amount: $99,978.00
Phase: Phase I
Program: STTR
Awards Year: 2003
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
11 Tech Circle, Natick, MA, 01760
DUNS: 184629491
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James Szabo
 Research Scientist
 (508) 655-5565
Business Contact
 Judy Budny
Title: Contracts Administrator
Phone: (508) 655-5565
Research Institution
 Francois D Lemire
 100 Institute Road
Worcester, MA, 01760
 (508) 831-5359
 Nonprofit college or university
Conventional Hall thrusters are difficult to scale to very small sizes. The proposed concept is a new type of compact plasma accelerator that addresses these scaling issues. It resembles a Hall thruster, taking advantage of the heritage of this proventechnology, but the current is driven inductively. It has the advantage of needing no cathode. While inductive coupling has been successfully demonstrated, it was forced to large planar devices. Differences in the concept proposed here will allow thethruster to scale to much smaller size.In the Phase I program, Busek Co. and our research partner Worcester Polytechnic Institute (WPI) will analyze and model the induced current thruster using a suite of in-house plasma simulation and thruster design tools. The theoretical and practical sizelimits of the concept will be determined. Experiments will be performed to characterize the B-field rise time to support design of the pulsed coil and magnetic structure.At the conclusion of Phase I, the detailed design of a prototype thruster and pulse driver electronics will be prepared.In Phase II, the prototype thruster will be built and tested in existing thruster test facilities at Busek to measure and characterize the performance and further optimize the design. There will be many applications for the small, induced current thruster. Not only will this technology be useful for small spacecraft and formation flying, as currently envisioned by the Air Force, but it may also be desirable for larger thrusters forcombined primary and ACS propulsion. The large planar inductive thrusters that were tested years ago had long operating life. We expect that this much smaller inductive device will have that advantage too. Because the discharge operates a high plasmadensity it can also find application in ion beam processing such as etching and milling.

* Information listed above is at the time of submission. *

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