电子束辐照圆环靶产生动态应变的实验研究

EXPERIMENTAL STUDIES OF THE DYNAMIC STRAIN PRODUCED IN THE CIRCULAR RING TARGETS BOMBARDED BY ELECTRON BEAM

动态应变是电子束辐照靶结构产生结构响应中的一个重要力学参数。本文叙述了近年来我们在“闪光二号”装置上进行电子束辐照圆环靶产生动态应变的实验研究。靶材为LY-12铝,靶厚为2.5～3mm,靶上能通量为50～60J/cm^2。实验结果表明,在圆环受照部分内表面中心处应变值可达1.6×10~4με,而在圆环两侧内表面处应变值为(0.45～0.65)×10~4με。

The dynamic strain is an important mechanic parameter of the structural response produced in the target structure bombarded by electron beam. In this paper, the experimental studies of the dynamic strain produced in the circular ring targets bombarded by electron beam on 'FLASH- Ⅱ' equipment during the recent years are described. The target material is LY-12 aluminum alloy with thicknesses 2. 5-3mm. The range of energy fluxex on targets is 50-60J/ cm2. The experimental results show that the strain values attained is 1. 6× 104με on the centre of the Inner-surface of the bombarded part in the circular rings, while the range of strain is (0. 45 -0. 65)×104Uμε on the inner-surface of two sides in the circular rings.