A sequential process from pulsed laser irradiation onto a spherical liquid propellant to impulse generation is discussed toward higher specific impulse performance of the thruster. A Q‐switched 10‐ns Nd: YAG laser pulse with 1 μm wavelength was focused in a 2‐mm diameter glycerin droplet in vacuum condition (∼10 Pa). Visible image of the droplet shot with the laser pulse, laser energy transmitted through the droplet, emission spectrum in visible to near infrared region, and temporal impulse behavior measured with piezoelectric devices were obtained. It is found that the impulse generation mechanism can be divided into energy deposition on the surface and inside of the droplet, and subsequent explosion of the droplet, depending on laser irradiation conditions.
Impulse Generation Mechanism in Glycerin Propellant Laser Thruster
BEAMED ENERGY PROPULSION: Second International Symposium on Beamed Energy Propulsion ; 2003 ; Sendai (JAPAN)
AIP Conference Proceedings ; 702 , 1 ; 146-151
30.03.2004
6 pages
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Impulse Generation Mechanism in Glycerin Propellant Laser Thruster
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