The experiments on laser propulsion of cylindrical models with spherical forebodies have been reported. The models with masses 2–5 g were propelled by a TEA CO2 laser (7 J, 1 μs, 30 Hz). The coupling coefficient Cm increased with cylinder length L. At nozzle diameter 20 mm it amounted to 50 dyne/W at L=60 mm and fluence I=1.5 J/cm2. The wire‐assisted flight with acceleration 18 m/s2 was demonstrated for 3.3 g‐model 60 mm‐long. The same model was tested in experiments with a single‐pulse e‐beam‐sustained CO2 laser (30 J, 10–24 μs). It was shown that momentum transferred to the model increases with I regardless of pulse duration τ if the breakdown threshold is exceeded. The maximum Cm≈70 dyne/W was demonstrated for 3.3 g‐model at τ=10 μs and I = 3 J/cm2. Cm≈60 dyne/W was obtained for a 140 g‐model with a single‐pulse TEA CO2 laser (125 J, 1 μs).
Experimental Investigation of Air‐breathing Mode of Laser Propulsion with Elongate Cylindrical Models and CO2 Lasers of Different Pulse Durations
BEAMED ENERGY PROPULSION: Third International Symposium on Beamed Energy Propulsion ; 2004 ; Troy, New York (USA)
AIP Conference Proceedings ; 766 , 1 ; 195-204
2005-04-27
10 pages
Conference paper
Electronic Resource
English
Experimental Investigation on Air-Breathing Mode of Laser Propulsion
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