Detecting the meteoroid by measuring the electromagnetic waves excited by the collision between the hypervelocity meteoroid and spacecraft  

作　　者：Bo LIU Heng ZHANG Bin XU Zhengzheng MA Hui LI Wenshan DUAN 刘博;张恒;徐彬;马征征;李辉;段文山(College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,Peopleʼs Republic of China;National Key Laboratory of Electromagnetic Environment(LEME),China Research Institute of Radio Wave Propagation,Qingdao 266107,Peopleʼs Republic of China)

机构地区：[1]College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,Peopleʼs Republic of China [2]National Key Laboratory of Electromagnetic Environment(LEME),China Research Institute of Radio Wave Propagation,Qingdao 266107,Peopleʼs Republic of China

出　　处：《Plasma Science and Technology》2022年第11期70-77,共8页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11965019,42004131 and 42065005).

摘　　要：The electromagnetic pulse excited by the collision between a hypervelocity meteoroid and a spacecraft is studied both numerically and theoretically.It is found that there are two kinds of electromagnetic pulse.The high-frequency electromagnetic pulse may be excited by the sum of all the electric dipoles.Each electron can be considered as an electric dipole.The low-frequency electromagnetic pulse is produced by the Langmuir oscillation of electrons.The energy flux density and the duration time of the excited low-frequency electromagnetic pulse by the meteoroid are also studied in the present paper.It is shown that the energy flux density increases as either the impact speed or the mass of the meteoroid increases.It is also shown that the duration time decreases as both the impact speed and the mass of the meteoroid increase.By measuring the strength and the duration time of the electromagnetic pulse excited by the collision between the hypervelocity meteoroid and spacecraft,we can estimate the speed and the mass of the hypervelocity meteoroid,which will be helpful in space flight and space exploration.

关 键 词：PLASMA electromagnetic pulses hypervelocity impact PIC simulation 

分 类 号：V528[航空宇航科学与技术—人机与环境工程]