This letter reports the first study of x-ray emission from plasma prod
uced by laser irradiation of gas puff targets. The gas puff targets we
re created by the pulsed injection of gas into a vacuum chamber. To ir
radiate the gas puff target a Nd-glass laser was used, which generated
1-ns pulses of up to 15 J in energy. Spatial, spectral, and temporal
measurements show that intense soft x-ray emission from the laser-irra
diated gas puff target is produced.