Experimental investigation on X-ray laser using two prepulses

The experimental investigation on X-ray laser is performed using two driving prepulses at the "Xingguang-Ⅱ" device. The experimental method and result are reported. The experiment didn't find remarkable enhancement of the output energy of X-ray laser using two prepulses than using one prepulse. One of the reasons maybe the driving laser energy is too low. Utilizing MED103 procedure to imitate calculation, it gives the same result as the experiment.