Theoretical and Experimental Studies of Magnetic Field on Electromagnetic Wave Propagation in Plasma

Xing, Xiao; Zhao, Qing; Liang, Zheng

doi:10.2528/pierm13030607

Cited by 8 publications

(1 citation statement)

References 15 publications

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“…Application of static magnetic field [14][15][16][17], or combined electric and magnetic field [18][19][20] reduces the interaction of electromagnetic waves with the plasma sheath by altering its properties. Recently, the use of time varying magnetic field for communication blackout mitigation has also been proposed [21].…”

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confidence: 99%

Mitigation of Communication Blackout During Re-Entry Using Static Magnetic Field

Mehra

Singh²,

Bera³

2015

PIER B

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Abstract-During re-entry into earth's atmosphere, a spacecraft suffers from loss of communication with the ground control station, known as communication blackout, due to formation of plasma around the re-entry spacecraft. This paper presents the theory and analysis of the communication blackout and its mitigation using static magnetic field method. The interaction between electromagnetic waves and plasma in presence as well as absence of magnetic field is described to determine the effects of plasma sheath on the spacecraft re-entering into the atmosphere. An analysis is done to determine the effectiveness of this mitigation technique for a typical re-entry spacecraft and the strength of magnetic field required to establish the communication link between the re-entry spacecraft and the ground station is obtained.

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confidence: 99%

Mitigation of Communication Blackout During Re-Entry Using Static Magnetic Field

Mehra

Singh²,

Bera³

2015

PIER B

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Interpreting the behavior of a quarter-wave transmission line resonator in a magnetized plasma

2014

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The quarter wave resonator immersed in a strongly magnetized plasma displays two possible resonances occurring either below or above its resonance frequency in vacuum, fo. This fact was demonstrated in our recent articles [G. S. Gogna and S. K. Karkari, Appl. Phys. Lett. 96, 151503 (2010); S. K. Karkari, G. S. Gogna, D. Boilson, M. M. Turner, and A. Simonin, Contrib. Plasma Phys. 50(9), 903 (2010)], where the experiments were carried out over a limited range of magnetic fields at a constant electron density, ne. In this paper, we present the observation of dual resonances occurring over the frequency scan and find that ne calculated by considering the lower resonance frequency is 25%–30% smaller than that calculated using the upper resonance frequency with respect to fo. At a given magnetic field strength, the resonances tend to shift away from fo as the background density is increased. The lower resonance tends to saturate when its value approaches electron cyclotron frequency, fce. Interpretation of these resonance conditions are revisited by examining the behavior of the resonance frequency response as a function of ne. A qualitative discussion is presented which highlights the practical application of the hairpin resonator for interpreting ne in a strongly magnetized plasma.

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Studies on the transmission of sub-THz waves in magnetized inhomogeneous plasma sheath

et al. 2018

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There have been many studies on the sub-terahertz (sub-THz) wave transmission in reentry plasma sheaths. However, only some of them have paid attention to the transmission of sub-THz waves in magnetized plasma sheaths. In this paper, the transmission of sub-THz waves in both unmagnetized and magnetized reentry plasma sheaths was investigated. The impacts of temporal evolution of the plasma sheath on the wave transmission were studied. The transmission of “atmospheric window” frequencies in a magnetized plasma sheath was discussed in detail. According to the study, the power transmission rates (Tp) for the left hand circular (LHC) and the right hand circular modes in the magnetized plasma sheath are obviously higher and lower than those in the unmagnetized plasma sheath, respectively. The Tp of LHC mode increases with both wave frequency and external magnetic field strength. Also, the Tp of LHC mode in both magnetized and unmagnetized plasma sheaths varies with time due to the temporal evolution of the plasma sheath. Moreover, the performance of sub-THz waves in magnetized plasma sheath hints at a new approach to the “blackout” problem. The new approach, which is in the capability of modern technology, is to utilize the communication system operating at 140 GHz with an onboard magnet installed near the antenna.

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Theoretical and Experimental Studies of Magnetic Field on Electromagnetic Wave Propagation in Plasma

Cited by 8 publications

References 15 publications

Mitigation of Communication Blackout During Re-Entry Using Static Magnetic Field

Mitigation of Communication Blackout During Re-Entry Using Static Magnetic Field

Interpreting the behavior of a quarter-wave transmission line resonator in a magnetized plasma

Studies on the transmission of sub-THz waves in magnetized inhomogeneous plasma sheath

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