Thrust generation through low-power laser-metal interaction for space propulsion applications

• Published in: Vacuum Vol. 88; pp. 75 - 78
• Main Authors: Horisawa, Hideyuki, Sumida, Sota, Yonamine, Hitoshi, Funaki, Ikkoh
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-02-2013
• Subjects: Laser propulsion; Low-power laser-metal interaction; Plasma propulsion; Plasma propulsion; Laser propulsion; Low-power laser-metal interaction
• ISSN: 0042-207X; 1879-2715
• DOI: 10.1016/j.vacuum.2012.03.031

The micro-Newton thrust generation was observed through low-power continuous wave laser and aluminum foil interaction without any remarkable ablation of the target surface. To evaluate the thrust characteristics, a torsion balance thrust stand capable for the measurement of the thrust level down to micro-Newton ranges was developed. In the case of an aluminum foil target with 12.5 micrometer thickness, the maximum thrust level was 15 micro-Newtons when the laser power was 20W, or about 0.75μN/W. It was also found that the laser intensity, or laser power per unit area, irradiated on the target was significantly important on the control of the thrust even under the low-intensity level.