Conical nozzles for pulsed laser propulsion

John E. Sinko; Nilesh B. Dhote; Jonathan S. Lassiter; Don A. Gregory

doi:10.1117/12.782430

12 May 2008 Conical nozzles for pulsed laser propulsion

John E. Sinko, Nilesh B. Dhote, Jonathan S. Lassiter, Don A. Gregory

Proceedings Volume 7005, High-Power Laser Ablation VII; 70052Q (2008) https://doi.org/10.1117/12.782430
Event: High-Power Laser Ablation 2008, 2008, Taos, New Mexico, United States

Abstract

A CO₂ laser of 300 ns pulse length, operating at 10.6 μm wavelength and from 1-4 J pulse energy was used to ablate carbon-doped Delrin^® (polyoxymethylene, or POM) targets in a set of conical aluminum minithrusters at standard temperature and pressure. Nozzles with lengths ranging from 0.5 - 5 cm were used (corresponding to expansion ratios of about 4 to 16), as well as a bare sample with no nozzle. A piezoelectric force sensor was used to record the imparted impulse for fluences in the range of 1-100 J/cm² for each thruster. The effect of increasing the expansion ratio on the impulse generation for single pulse laser propulsion experiments will be described. The study will also clarify the effect of confining air from an ambient atmosphere in augmenting impulse generation.

Citation Download Citation

John E. Sinko, Nilesh B. Dhote, Jonathan S. Lassiter, and Don A. Gregory "Conical nozzles for pulsed laser propulsion", Proc. SPIE 7005, High-Power Laser Ablation VII, 70052Q (12 May 2008); https://doi.org/10.1117/12.782430

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