一种高空核电磁脉冲磁场测量技术  

A magnetic field measurement technology of high altitude electromagnetic pulse

作　　者：王伟 朱志臻[1,2] 聂鑫 杨静[1,2] 石跃武 王锦锦[1,2] WANG Wei;ZHU Zhizhen;NIE Xin;YANG Jing;SHI Yuewu;WANG Jinjin(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect ,Xi'an 710024, China;Northzvest Institute of Nuclear Technology ,Xifan 710024, China)

机构地区：[1]强脉冲辐射环境模拟与效应国家重点实验室,西安710024 [2]西北核技术研究所,西安710024

出　　处：《电波科学学报》2019年第3期347-354,共8页Chinese Journal of Radio Science

基　　金：国家重点实验室自主基础研究课题(SKLIPR1406Z)

摘　　要：针对高空核电磁脉冲(highaltitude electromagnetic pulse,HEMP)试验研究,分析了电小环天线测量原理和频率特性,建立了传感器数值模型,研究了其脉冲接收特性,设计了一种B-dot传感器,研制了一套脉冲磁场测量系统.结果表明:当环面半径小于20mm,传感器的上限截止频率达到720MHz以上,标定结果显示测量系统整机的上升时间小于1ns.应用该系统测试HEMP模拟器的电磁脉冲环境,并与电场测量结果进行了比对和验证,结果与理论相符,该系统具备HEMP模拟器产生的快前沿脉冲磁场的测量能力,同时可推广应用于其他强脉冲磁场测量.For the high altitude electromagnetic pulse testing research purpose, the measuring principle and frequency characteristic of electrically small loops are analyzed in this paper. A numerical model of electrically small loop is founded, and the pulse receiving characteristics are obtained by simulation. Then, the B-dot sensor is designed, and a pulsed magnetic field measuring system is constructed. The results show that the sensor's upper cut-off frequency exceeds 720 MHz when the ring radius is less than 20 mm, and the system calibrated risetime is less than 1 ns. The measuring system is used to measure the magnetic field generated by a HEMP simulator. It shows that the system can measure pulsed magnetic field with fast risetime, and it can also be applied to measure other pulsed magnetic field with high magnitude.

关 键 词：高空核电磁脉冲 磁场 测量技术 电小环天线 快前沿 

分 类 号：O441.5[理学—电磁学]