利用单光子入射方法测量了高强度超短脉冲激光 (1 3 0fs,1 0 16 W cm2 ,744nm)与固体等离子体相互作用产生的超快 (ps)硬X射线 (>3 0keV)能量连续谱。采用铅屏蔽、激光脉冲和线性门同步符合技术将HPGeX射线谱仪的本底计数率降低到 1 0 -4 炮 ,满足了单光子计数时的低本底要求。用该谱仪实际测量了激光等离子体产生的超快硬X射线能谱 ,所得结果与理论预期符合。 The fast (ps) hard X-ray (> 30 keV) energy continuum spectra of high-intensity ultra-short pulse laser (130 fs, 1006 W cm2, 744 nm) . The use of lead shielding, laser pulses, and linear gate synchro- nization techniques reduced the background count rate of HPGeX radiometers to 10 -4 shots, meeting the low background requirements of single-photon counting. The spectrometer was used to measure the ultra-fast X-ray energy spectrum produced by laser plasma. The obtained results are consistent with the theoretical expectation.