高空核爆炸X射线电离的时空分布数值模拟  

Numerical simulation of temporal and spatial distribution of X-ray ionization with high-altitude nuclear explosion

作　　者：欧阳建明[1] 马燕云[1] 邵福球[1] 邹德滨[1] 刘建勋[1] 

机构地区：[1]国防科学技术大学理学院,长沙410073

出　　处：《物理学报》2012年第24期149-153,共5页Acta Physica Sinica

摘　　要：利用数值模拟程序模拟了高空核爆炸辐射的X射线对不同高度大气的电离及演化过程,给出了电子的时空分布曲线.结果表明:在80km爆高1kt小当量高空核爆炸情况下,电子数密度随高度只出现一个极大值,而在80km以上爆高情况下,电子数密度出现两个极大值,一个位于爆点附近,另一个位于90km高度附近,在这个高度电离的影响范围最大;高空核爆炸辐射的X射线在70km高度附近截止,对70km以下高度没有电离影响;随着辐射角度的增加,电子数密度出现第二个极大值的高度有所上升,X射线截止高度也有所上升.The X-ray radiation ionization processes at different altitudes of atmosphere with high-altitude nuclear explosions are numerically simulated, and the temporal and spatial distribution curves of electrons are shown in this paper. The electron density has one maximal point with 1 kt equivalent explosion at 80 kilometers, which is near the explosion point. It is different from the explosion point above 80 kilometers, and the electron density has two maximal points in that case. One is near the explosion point, and the other is near 90 km altitude, where the ionization effect range of high-altitude nuclear explosion is widest. The X-ray of high-altitude nuclear explosion has no effect at below 70 km altitude. With the increase of radiation angle, the altitude of the second electron density maximal point increases, and the cut-off altitude of X-ray increases too.

关 键 词：高空核爆 电子分布 数值模拟 

分 类 号：TL91[核科学技术—核技术及应用]