电子束辐照多层介质能量沉积规律的仿真研究
Simulation study on energy deposition in layered target irradiated by electron beam
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摘要: 电子束辐照多层介质能量沉积规律研究是进行脉冲电子束辐照动力学研究的基础，同时它也是一个难点。文章利用改进的SANDYL程序构建模型，计算了在200 J/cm2能通量下，具有不同平均入射动能的电子束辐照碳酚醛/铝/碳酚醛/铝（C-ph/Al/C-ph/Al）结构和铝/金/铝/金（Al/Au/Al/Au）结构时的能量沉积情况，并由此得出电子束辐照多层介质时的能量沉积规律：在能通量一定的情况下，随着入射电子平均动能的增加，其穿透能力逐渐增强，但是沉积能量的峰值逐渐减小，且峰值的位置逐渐向靶内层偏移；在每层介质内部，随着电子入射平均动能不同而呈现不同的能量沉积剖面；在介质交界面处，由于阻止本领的不同，沉积的能量不连续。
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关键词:
- 电子束；多层介质；能量沉积；蒙特卡罗法
Abstract: The energy deposition in layered-target irradiated by electron beam is closely related with the thermal and mechanical effects in the targets. In this paper, with the modified program SANDYL based on the Monte Carlo method, the energy deposition profiles in C-ph/Al/C-ph/Al and Al/Au/Al/Au under the pulsed electron beam irradiation with different incident energies are obtained. Based on the results, the energy deposition law in layered-target is analyzed and it is concluded that the peak value and its position are closely related with the incident energy of the electrons, and the energy deposition profiles are discontinuous at the interfaces of different layers.-
Keywords:
- electron beam
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