强脉冲超硬Ｘ射线产生技术研究
Generation of intense pulsed super-hard X-ray
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摘要: 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。Abstract: 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
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Key words:
- super-hard x-ray /
- pulsed intense current electron beam /
- bremsstrahlung
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