基于神光Ⅱ激光装置, 利用第九路激光与金属靶Pd作用产生了能谱在2.9~3.6 keV的X射线源, 其转换效率达到8%。通过多角度带通XRD测量其发射角分布, 其分布满足cos1/3θ的规律。研究结果表明, Pd X射线源具有高亮度以及能点适中的特性, 可以应用于惯性约束聚变、天体物理等前沿科学研究。

Laser-induced X-ray source is widely used in high energy density physics. The experiment studied the Pd L-band X-ray source produced from the 9th laser (400 J/1 ns/351 nm) irradiating 10 μm Pd targets on Shenguang Ⅱ facility. The emission spectrum of Pd L-band X-ray was 2.9-3.6 keV. The conversion efficient of Pd L-band X-ray was 8%. The angular distributions measured in front of the targets could be fitted with the function of cos1/3θ. The experimental result shows that the Pd X-ray source has the advantage of proper X-ray wavelength and high brightness.