电子束辐照铝圆柱壳时能量沉积及冲击载荷的估算

Estimation of Energy Deposition and Impulsive Loads of Cylindrical Shell Caused by an Electron Beam

在研究核爆炸产生的x射线及强激光束对靶材的结构破坏效应时,可用强流低能相对论电子束来间接进行模拟。当电子束辐照到铝靶材圆柱壳体时,圆柱壳吸收大量的能量后表层汽化。由于表层汽化物质的快速飞散,在圆柱壳体上将受到冲击载荷的作用。本文利用了半经验公式估算了强流低能相对论电子束在铝圆柱壳体内的能量瞬时沉积,同时利用文献的方法估算了汽化反冲压力。

When studying the structural damage effect of a target caused by x-ray from nuclear explosion and intense laser beams, we may use a high-current and lowenergy relativistic electron beam as indirect radiant source. When a cylindrical shell is radiated by the electron beam, the radiant energy can sublimate the surface layer, provided the levels of absorbed radiant energy are sufficiently high. This extremely rapid sublimation can produce impulsive loads on the cylindrical shell due to the momentum transfer re suiting from the rapid movement of the surface particals, In this paper, we estimate the energy instant deposition in the aluminum cylindrical shell caused by a high-current and low-energy relativistic electron beam with a half-empirical formula, and then we also estimate the blowoff impulse by using the method of reference[1].