Abstract
An eight-beam 0.351-µm laser with pulse duration of about 1.0ns andenergy of 260 J per beam was injected into a cylindrical cavity togenerate intense x-ray radiation on the Shengguang II high power laserfacility. A mixture foil of gold and gadolinium and a gold foil wereattached on portion of a diagnostic hole in the mid-plane of the cavityand ablated by the intense x-ray radiation. The propagating time of theradiation heat wave in the mixture and the pure gold foil were measuredwith soft-x-ray spectrometer and by adopting space- and time-resolvedmeasurement technology, respectively. The results show that the mixtureof gold and gadolinium has higher Rosseland mean opacity than the goldsample in our experiment.
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