X-ray generation from fs laser heated Xe clusters

The property of soft X-ray generation from Xe clusters irradiated with intense lasers was studied. The wavelength, the pulse width, and the pump energy were widely varied. Through this survey, even with the comparatively low-density Xe jet of <5×1018 cm−3 average atomic density, the highest conversion efficiency of over 10% from laser energy to soft X-ray (5–18 nm) was obtained with a femtosecond KrF laser pulse, where a 4π source was assumed.