超高速碰撞产生等离子体的电磁场测量方法  

Measurement Method of Electromagnetic Fields of Plasma Produced by Hypervelocity Impact

作　　者：马月芬[1] 张庆明[1] 吴碧[2] 李一磊[1] 张东江[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]空军装备研究院总体所,北京100076

出　　处：《北京理工大学学报》2011年第9期1118-1121,共4页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(11032003)

摘　　要：介绍了超高速碰撞过程中等离子体产生的环形电磁场测量方法,测量过程中采用螺旋型线圈,并分析了该线圈对外界干扰磁场的屏蔽效应.实验中采用该线圈测量到速度为6.2km/s的球形LY12铝弹丸超高速碰撞LY12铝靶板产生磁场强度随时间的变化规律.测试结果表明,等离子体产生的瞬态电磁场的持续时间为1ms左右,最大幅值为15μT.The method of using spiral coil to measuring ring electromagnetic field generated by hypervelocity impact process is detailed in this paper. The shielding effect of the coil on outside interference magnetic field was analyzed. Under the experimental condition that the spherical LY12 aluminum projectile with hypervelocity of 6.2 km/s impacted LY12 aluminum target plate, the variation of magnetic field intensity with time was measured by using coil and its integral circuit. Test results showed that the time of transient electromagnetic fields generated by plasma lasted about 1ms and the most significant value was 15μT.

关 键 词：超高速碰撞 等离子体 磁场强度 螺旋型线圈 

分 类 号：O531[理学—等离子体物理]