SOFT X-RAY CONVERSION FROM Au DISK IRRADIATED BY 1.06μm LASER

In the experiments of Au disk irradiated by l.O6μm laser, the angular distribution of soft X-ray energy (O.l~ 1.SkeV) wasmeasuredusing plateau response X-ray diode detectors, and then the soft X-ray conversion efficiency was acquired. Experiments conditions: Laser wavelength 1.06μm, Laser energy 60~500J, Laser FWHM about 80Ops, f/1.7, Laser intensity l0¹³~10¹⁴W/cm². The results of experiments were shown as follows:The angular distribution of soft X-ray energy shows approximately the distribution of a+bcose, and sof X-ray conversion efficiency decreases with the increase of laser intensity.When laser spot is 235μm and laser intenity is about 5.0×l0¹⁴w/cm², soft X-ray conversion efficiency is about 31.0%.