Excitation of plasma resonance in a magnetoactive plasma by an external source I. A source in a homogeneous plasma

Mareev, E. A.; Chugunov, Yu. V.

doi:10.1007/bf01083480

Cited by 11 publications

(14 citation statements)

References 2 publications

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“…The organization of the theoretical calculation of the transmitted levels falls logically into two parts. In Section 3.1, we develop the formulas for the electric field radiated by the OC “Double‐V” transmitting dipole under the quasistatic approximation using the methods described by Mareev and Chugunov [1987]. Then, in section 3.2, we present the relevant forms of the expressions developed recently by Chugunov [2001] for the open‐circuit voltage induced on a receiving dipole located close to the cold‐plasma resonance cone surface.…”

Section: Introductionsupporting

confidence: 63%

Transmission of waves near the lower oblique resonance using dipoles in the ionosphere

et al. 2003

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[1] The observations in the OEDIPUS-C experiment of bistatic propagation along the lower oblique resonance cone between a separated transmitter and receiver in the ionosphere are explained through detailed calculations of the radiated field of the Vdipole antenna used in the experiment and by a novel theory of the receiving antenna under resonance conditions. Unexpectedly high values of 25 kHz signal observed at the resonance and its structure agree well with calculations of the transmission between the exciter and receiver, when antenna layout and dispersive properties of the plasma at resonance are taken into account.

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Section: Introductionsupporting

confidence: 63%

Transmission of waves near the lower oblique resonance using dipoles in the ionosphere

et al. 2003

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“…12 This second theoretical treatment includes thermal corrections in the dispersion relation. The spatial half width of the resonance cone is somewhat larger than in Fig.…”

Section: Dipole Near Fieldmentioning

confidence: 99%

“…The value of cone thickness used, 2 m, is intermediate between the values predicted by theories cited. 11,12 …”

Section: Dipole Near Fieldmentioning

confidence: 99%

“…Although the total near field E is not directly available from either of the previously cited references, 11,12 radial E r and axial E a components have been computed in a cylindrical geometry for analysis of the Cosmos-1809 SAP data. 13 In that model, E r ӍV 0 /4r, where r is radial distance from a dipole arm.…”

Section: Acceleration In the Very Near Electric Fieldmentioning

confidence: 99%

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OEDIPUS-C observations of electrons accelerated by radio frequency fields at whistler-mode frequencies

et al. 1999

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Simultaneous measurements of transmitted 500 kHz electric fields and of electron fluxes nonlinearly energized by those fields were made during the ionospheric flight of the rocket double payload OEDIPUS C. Given the local plasma parameters, 500 kHz corresponded to the whistler mode of cold-plasma propagation. As the separation between each payload end increased from 153 to 537 m, enhanced electron fluxes were detected at energies up to 20 keV, at the receiver end of the tether. Rf (radio frequency) electric fields created by the OEDIPUS-C transmitter have been computed for positions close to the whistler-mode group resonance cone and also for locations very close to the active dipoles. Test-particle trajectory tracings show that linear acceleration can account for the energy increases of electrons with starting energies up to about 100 eV. Neither resonant field-particle interactions of background energetic electrons nor strong turbulence of the background thermal particles explain the creation of sounder-accelerated electrons at 1–10 keV. The calculated magnitudes of the very near potentials, up to 550 V, point to acceleration by intense fields in the rf sheath region.

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“…More recently, Mareev and Chugunov [1987] have extended the model further by incorporated spatial dispersion and particle collisions.…”

Section: Introductionmentioning

confidence: 99%

Current distribution of a VLF electric dipole antenna in the plasmasphere

2006

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[1] In a recent paper (Inan et al., 2003) a method of remediating enhanced energetic electron fluxes in the radiation belt was proposed in which injection of VLF whistler mode waves from spacecraft within the radiation belts would dramatically increase the pitch angle scattering of the relativistic electrons and cause these particles to be rapidly lost from the belts, thereby mitigating the flux enhancement. The VLF wave transmitting system discussed by Inan et al. (2003) involves electric dipole antennas. One of the most important characteristics of such an antenna is the current distribution along the length of the dipole, since it is this current which ultimately determines the amount of VLF power which can be radiated from the antenna into the plasma. In past work it has been assumed without proof that the dipole current has a triangular distribution. In the present work we determine the dipole antenna current distribution from first principles, constructing an integral equation of the Hallén type relating the current distribution to the wave vector potential. In this development it is assumed that the length of the thin cylindrical dipole antenna is small compared to the wavelength of whistler mode waves which propagate parallel to the Earth's magnetic field B o . In the case of the dipole antenna oriented parallel to B o , it is found that the assumption of a triangular current distribution is reasonable for antenna lengths up to hundreds of meters. For the case of the antenna perpendicular to B o , it is found that the current decays exponentially along the antenna from the feed points to the antenna ends. In this case we find the conditions under which a triangular current distribution is still a reasonable approximation. We also give the conditions under which the quasi-static model of Balmain (1964) reasonably describes the electric fields associated with the dipole antenna.

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Excitation of plasma resonance in a magnetoactive plasma by an external source I. A source in a homogeneous plasma

Cited by 11 publications

References 2 publications

Transmission of waves near the lower oblique resonance using dipoles in the ionosphere

Transmission of waves near the lower oblique resonance using dipoles in the ionosphere

OEDIPUS-C observations of electrons accelerated by radio frequency fields at whistler-mode frequencies

Current distribution of a VLF electric dipole antenna in the plasmasphere

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