Absorption‐Enhanced Liquid Ablatants for Propulsion with TEA CO2 Laser
2005
A technique based on measuring force as a function of time on laser‐ablated targets was applied to the study of water solutions of Sodium Tetrafluoroborate [NaBF4], a compound that strongly absorbs radiation in the 8–11 μm wavelength interval. A TEA CO2 laser of wavelength 10.6 μm, 300 ns pulsewidth and 8 J pulse energy, was used for ablation of water diluted NaBF4 contained in a conical aluminum nozzle. Net imparted impulse and coupling coefficient were derived from the force sensor data and are reported below.
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