分析了利用强流脉冲电子束轫致辐射产生强脉冲超硬X射线的几种主要技术途径的特点,以及提高超硬X射线产额的方法;利用MCNP软件计算了电子能量在0.4～1.4 MeV范围内,超硬X射线产生效率与钽辐射转换靶厚度的关系曲线;介绍了在"强光一号"加速器上开展产生强脉冲超硬X射线实验方法与实验结果,获得了3种强脉冲超硬X射线:脉冲宽度约35 ns,输出窗面积约50 cm²,能量密度为5～7 J/cm²;脉冲宽度约35 ns,输出窗面积约50 cm²,能量密度为12 J/cm²;脉冲宽度约35 ns,输出窗面积约500 cm²,能量密度为1 J/cm².

The present condition of technique research on generation of intense pulsed super-hard X-ray via bremsstrahlung of pulsed intense-current pinched electron beam was described.The characteristics of a few main techniques to generate intense pulsed super-hard X-ray were compared,and the methods to increase the super-hard X-ray yield were analyzed.Making use of the MCNP code the relations of super-hard X-ray generation efficiency with tantalum radiating converter thickness in the electron energy range of 0.4～1.4 MeV were calculated.Moreover,the three experiment techniques for generation of intense pulsed super-hard X-ray on "QuangGuang-I" accelerator were introduced and the respective results corresponding to the three kinds of diode were:(1) the super hard X-ray energy density of 5～7 J/cm² on radiation area 50 cm with pulse duration(35±5) ns;(2) the super hard X-ray energy density of 12 J/cm² on radiation area 50 cm² with pulse duration(35±5) ns;(3) the super hard X-ray energy density of 1J/cm² on radiation area 500cm² with pulse duration (35+-5)ns.