电子束辐照平板靶产生喷射冲量的实验研究

 喷射冲量是电子束辐照靶结构时引起其结构响应的加载条件。本文论述了近年来我们采用电涡流传感器和直接测量特定时间间隔的探头原理,在“闪光二号”装置上,进行电子束辐照平板靶产生喷射冲量的实验研究。使用的靶材为硬铝和玻璃钢,靶上能通量为70~100 J/cm²,实测冲量为150~210 Pa·s,实测冲量耦合系数基本稳定在2.06 Pa·s/(J/cm²)。

EXPERIMENTAL STUDIES OF THE BLOWOFF IMPULSES PRODUCED IN THE FLAT PLATE TARGETSMBARDED BY ELECTRON BEAM

The blowoff impulses are the condition of applied loads of the structural response induced in the target structures bombarded by electron beam. In this paper, the experimental studies of the blowoff impulses produced in the flat plate targets bombarded by electron beam on "FLASH-Ⅱ" equipment of late years are discussed. In experiments, the eddy transducers and the probe principle of directly measuring the specific time intervals were used. The used target materials are LY-12 aluminum alloy and glass fiber reinforced plastic. The range of the energy fluxes on targets is 70～100 J/cm². The range of the measured impulses is 150～210 Pa•s. The measured coupling coefficients of impulses are stable basically. Their values equal to about 2.06 Pa·s/(J/cm²).