Design and characterization of nozzles and solid propellants for IR laser propulsion |
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Authors: | Cinthya Toro Nicolás D Gómez Norberto G Boggio Jorge Codnia M Laura Azcárate Carlos Rinaldi |
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Institution: | 1. Depto. de Micro y Nanotecnología, Comisión Nacional de Energía Atómica (CNEA), Av. Gral. Paz 1499, 1650, San Martín, Buenos Aires, Argentina 2. Dpto. de Investigaciones en Láseres y Aplicaciones, Instituto de Investigaciones Científicas y Técnicas para la Defensa (CITEDEF), San Juan Bautista de La Salle 4397, B1603ALO, Villa Martelli, Buenos Aires, Argentina 3. Facultad de Ingeniería, Universidad de Buenos Aires, Av. Paseo Colón 850, C1063ACV, Buenos Aires, Argentina 4. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, C1033AAJ, Buenos Aires, Argentina 5. Instituto de Nanociencia y Nanotecnología (INN), Av. Gral. Paz 1499, 1650, San Martín, Buenos Aires, Argentina
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Abstract: | In this article, we present an experimental study of the effect of conical section nozzles coupled to solid targets on laser ablation propulsion. The impulse produced on the target by laser ablation was measured in terms of the coupling coefficient C m using a piezoelectric (PZT) sensor. The standard deviation of the PZT signal was used as an estimator of the transferred impulse. The ablation was performed with a TEA CO2 laser at room temperature and atmospheric pressure. The targets were pellets of 90/10 % w/w Zn/CaCO3 concentration ratio. Aluminum nozzles with conical section were coupled to these propellant pellets. A comparative study of the variation of C m using nozzles of different inlet and outlet diameters of the ejected material as well as of different heights was made. The results demonstrate that for the pellet composition analyzed, as the nozzle’s height increases and its diameter decreases improvements up to 250 % respect to the target without nozzle are obtained. These are promising results for the potential development of laser ablation microthrusters. |
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