Transmission characteristics of EM wave in a finite thickness plasma

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Transmission characteristics of EM wave in a finite thickness plasma
	Zhu NY(竺乃宜); Huang LS(黄立舜); Wu B(吴彬); Yu XL(余西龙); Wu RH; Meng G; Ren AM; Hu XT; Wu B(吴彬)
刊名	ACTA MECHANICA SINICA
	2013-04-01
通讯作者邮箱	wubin@imech.ac.cn
卷号	29 期号:2 页码:189-195
关键词	Plasma Electromagnetic wave Shock tube Numerical simulation
ISSN号	0567-7718
通讯作者	吴彬
产权排序	[Zhu, NaiYi;Huang, LiShun;Wu, Bin;Yu, XiLong] State Key Lab of High Temperature Gas Dynamics (LHD), Institute of Mechanics, Chinese Academy of Sciences, 100190 Beijing, China;[Wu, RunHui; Meng, Gang; Ren, AiMin; Hu, XinTian] State Key Lab of Experimental Physics and Computational Mathematics, China Aerospace Technology Corporation, 100076 Beijing, China
合作状况	国内
中文摘要	One of the key factors for solving the problems of re-entry communication interruption is electromagnetic (EM) wave transmission characteristics in a plasma. Theoretical and experimental studies were carried out on specific transmission characteristics for different plasma sheath characteristic under thin sheath condition in re-entry state. The paper presents systematic studies on the variations of wave attenuation characteristics versus plasma sheath thickness L, collision frequency ν, electron density ne and wave working frequency f in a φ 800mm high temperature shock tube. In experiments, L is set to 4 cm and 38 cm. ν is 2 GHz and 15 GHz. ne is from 1×10^10 cm−3 to 1×10^13 cm−3, and f is set to 2, 5, 10, 14.6 GHz, respectively. Meanwhile, Wentzel–Kramers–Brillouin (WKB) and finite-difference time-domain (FDTD) methods are adopted to carry out theoretical simulation for comparison with experimental results. It is found that when L is much larger than EM wavelength λ (thick sheath) and ν is large, the theoretical result is in good agreement with experimental one, when sheath thickness L is much larger than λ, while ν is relatively small, two theoretical results are obviously different from the experimental ones. It means that the existing theoretical model can not fully describe the contribution of ν. Furthermore, when L and λ are of the same order of magnitude (thin sheath), the experimental result is much smaller than the theoretical values, which indicates that the current model can not properly describe the thin sheath effect on EM attenuation characteristics.
学科主题	流体力学
分类号	二类
收录类别	SCI ; EI ; CSCD
原文出处	http://dx.doi.org/10.1007/s10409-013-0008-3
语种	英语
WOS记录号	WOS:000318882700005
公开日期	2013-06-13
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/47284]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Wu B(吴彬)
推荐引用方式 GB/T 7714	Zhu NY,Huang LS,Wu B,et al. Transmission characteristics of EM wave in a finite thickness plasma[J]. ACTA MECHANICA SINICA,2013,29(2):189-195.
APA	Zhu NY.,Huang LS.,Wu B.,Yu XL.,Wu RH.,...&吴彬.(2013).Transmission characteristics of EM wave in a finite thickness plasma.ACTA MECHANICA SINICA,29(2),189-195.
MLA	Zhu NY,et al."Transmission characteristics of EM wave in a finite thickness plasma".ACTA MECHANICA SINICA 29.2(2013):189-195.