将针孔透射光栅谱仪和X射线CCD相结合,探测到超短脉冲激光(<60 fs)与多种固体平面靶相互作用而产生的、波长范围在1～15 nm之间的高重复频率X射线发射,随着入射激光能量的增加,各种靶不同的X射线带的发射呈线性增长,并发现在超短脉冲激光作用下,L带发射效率最高元素的原子序数比长脉冲打靶时要来得小。

X-ray sources at high repetition rate were obtained in the experiments of the ultra-short pulsed laser (<60 fs) interaction with different target elements. The wavelength range was from 1 to 15 nm. With the energy of the incident laser increasing, the intensities of X-rays emitted from different elements are enhanced. The element which has the highest emission of L band is different with that in the experiments of long-pulse lasers interaction with targets. A pinhole transmission grating and X-ray CCD were used as detectors in our experiments.