Micro-multi-plasmajet array thruster for space propulsion applications

Thrust performance tests were conducted for an arrayed multi-plasmajet structure consisting of rectangular nozzle elements each with an exit height of 0.5 mm and length of 0.5 mm. To evaluate the thrust characteristics of the arrayed micro-multi-plasmajet, the thrust was measured using a calibrated...

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Bibliographic Details
Published in:Vacuum 2010-11, Vol.85 (5), p.574-578
Main Authors: Horisawa, Hideyuki, Sawada, Fujimi, Hagiwara, Shuji, Funaki, Ikkoh
Format: Article
Language:English
Subjects:
Arrays
Calibration
Direct current
Discharge
Electric Propulsion
Micro-multi-plasmajet array
Micro-thruster
Nozzles
Specific impulse
Stands
Thrust
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Summary:Thrust performance tests were conducted for an arrayed multi-plasmajet structure consisting of rectangular nozzle elements each with an exit height of 0.5 mm and length of 0.5 mm. To evaluate the thrust characteristics of the arrayed micro-multi-plasmajet, the thrust was measured using a calibrated cantilever-type thrust stand in vacuum. Using 3 × 3 nozzle elements, the micro-plasmajet array showed stable DC operation. Compared to conditions with cold-gas flow, the application of a DC discharge showed a significant improvement in thrust performance of at least 20% for thrust and specific impulse. Typical values achieved for thrust, specific impulse and thrust efficiency at an input power of 6.3 W were 8.5 mN, 77 s and 0.21, respectively.
ISSN:0042-207X
1879-2715
DOI:10.1016/j.vacuum.2010.08.014