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电磁脉冲(Electromagnetic Pulse)简称EMP,是高空大当量核爆炸产生的一种二次效应,和冲击波、热辐射、放射性沾染等人们熟悉的一次效应不同。它对人无害,但对电气和电子设备有很大的破坏力,作用范围极大,因此一直受到各国防务部门的关切。但是在60年代中期以前,对这种现象的研究一直是高度保密的,美国联邦应急管理局的技术性灾害调节处(Federal Emergency Management Agency’s Technological HazadsMitigation Division)的一位领导人Kerr曾说,在1965年时他不能研究EMP对民防系统
Electromagnetic Pulse (EMP), short for EMP, is a quadratic effect caused by high-altitude large equivalent nuclear explosion, which is different from the familiar one-time effect such as shock wave, heat radiation and radioactive contamination. It is harmless to human beings but has a great destructive effect on electrical and electronic equipment and has a very wide range of effects and has therefore always been of concern to defense departments in various countries. But until the mid-1960s, research into this phenomenon had been highly confidential, said Kerr, a leader of the Federal Emergency Management Agency’s Technological Hazadan Division, who said in 1965 When he could not study EMP on civil defense systems