Whistler wave radiation from a pulsed loop antenna located in a cylindrical duct with enhanced plasma density

被引：6

作者：

Kudrin, Alexander V. ^{[1
]}

Shkokova, Natalya M. ^{[1
]}

Ferencz, Orsolya E. ^{[2
]}

Zaboronkova, Tatyana M. ^{[1
,3
]}

机构：

[1] Univ Nizhny Novgorod, Dept Radiophys, Nizhnii Novgorod 603950, Russia

[2] MTA Res Ctr Astron & Earth Sci, H-9400 Sopron, Hungary

[3] RE Alekseev State Tech Univ Nizhny Novgorod, Dept Nucl Phys, Nizhnii Novgorod 603950, Russia

来源：

PHYSICS OF PLASMAS | 2014年 / 21卷 / 11期

基金：

俄罗斯科学基金会;

关键词：

VLF RADIATION; PROPAGATION; EXCITATION; RESISTANCE; DIPOLE; IMPEDANCE; FIELDS;

D O I：

10.1063/1.4901949

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Pulsed radiation from a loop antenna located in a cylindrical duct with enhanced plasma density is studied. The radiated energy and its distribution over the spatial and frequency spectra of the excited waves are derived and analyzed as functions of the antenna and duct parameters. Numerical results referring to the case where the frequency spectrum of the antenna current is concentrated in the whistler range are reported. It is shown that under ionospheric conditions, the presence of an artificial duct with enhanced density can lead to a significant increase in the energy radiated from a pulsed loop antenna compared with the case where the same source is immersed in the surrounding uniform magnetoplasma. The results obtained can be useful in planning active ionospheric experiments with pulsed electromagnetic sources operated in the presence of artificial field-aligned plasma density irregularities that are capable of guiding whistler waves. (C) 2014 AIP Publishing LLC.

引用

页数：11

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