This paper presents some results on the air-breathing propulsion experiments with a parabolic light craft and a self-made
UV-preionized TEA CO2 laser with 115 J maximum pulse energy. In wire-guided vertical flight experiment, impulse-coupling
coefficient 390 N/MW is obtained at the pulse energy 60 J. The influence of the shape of the lightcraft and the
laser pulse profile on the coupling coefficient was discussed. The spectrum of the plasma was detected using
monochromator, and the time evolvement process of line spectrum of the plasma was analyzed.
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