Stimulated scattering of intense radio waves in partially ionized space dusty plasmas

Shukła, P. K.; Eliasson, Bengt; Stenflo, L.

doi:10.1029/2003ja010184

Cited by 3 publications

(3 citation statements)

References 33 publications

(44 reference statements)

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“…18,68 In this section, we will perform the numerical analysis of the TB state in PID plasma using the plasma parameters that are typical of Earth's ionosphere in the E-region where nn = 10 11 cm −3 , ni = 10 5 cm −3 , Z d n d ≃ 0.7ni, ne ≃ 0.3ni, B 0 = 0.5 G, mi = m NO + = 5.5 × 10 4 me, and mn ≈ mi. 69 In the relaxed state, the eigenvalues, which are functions of plasma parameters such as Beltrami parameters, species densities, masses, etc., preserve all the information about the nature and size of the relaxed state structures. Hence, we start by investigating how the Beltrami parameters affect the TB structures while keeping all the other plasma parameters the same.…”

Section: Resultsmentioning

confidence: 99%

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Beltrami fields in partially ionized magnetized dusty plasma

2023

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The relaxed state of a magnetized four-component partially ionized dusty (PID) plasma is explored. PID plasma is composed of inertial electrons, positive ions, neutrals, and static negatively charged dust particles. When the neutrals are dragged along with the ions, the steady-state solution of vortex dynamic equations for inertial electron and ion species yields a triple Beltrami relaxed state, which is a linear combination of three single force-free fields and is characterized by three self-organized structures. The impact of plasma parameters such as Beltrami parameters and neutral (degree of ionization) and dust species densities on the nature of the relaxed state is investigated. Furthermore, the role of scale separation and its implication in space plasma are also presented. The present research will aid in elucidating the role of neutral and dust species in space, astrophysical, and laboratory plasmas.

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Section: Resultsmentioning

confidence: 99%

“…For these imaginary eigenvalues, the given boundary conditions (g = 0.5 and h = 1.0), and plasma parameters given in Ref. 69, the self-organized state shows perfect diamagnetism. For a system of size 5λe, the magnetic field strength is 40B 0 corresponding to the above-mentioned parameters.…”

Section: Articlementioning

confidence: 88%

Beltrami fields in partially ionized magnetized dusty plasma

2023

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“…The trapped Z-mode waves exhibit a wide and downshifted frequency spectrum, indicating multiple inverse cascades towards lower frequencies. Future extensions may involve dusty plasma (Shukla and Mamun 2002) in the ionosphere, where parametric instabilities can be induced by large-amplitude electromagnetic waves (Shukla et al 2004). …”

Section: Discussionmentioning

confidence: 99%

Full-scale simulation study of stimulated electromagnetic emissions: The first ten milliseconds

Eliasson¹,

Stenflo

2010

J. Plasma Phys.

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Abstract.A full-scale numerical study is performed of the nonlinear interaction between a large-amplitude electromagnetic wave and the Earth's ionosphere, and of the stimulated electromagnetic emission emerging from the turbulent layer, during the first 10 milliseconds after switch-on of the radio transmitter. The frequency spectra are downshifted in frequency and appear to emerge from a region somewhat below the cutoff of the O mode, which is characterized by Langmuir wave turbulence and localized Langmuir envelopes trapped in ion density cavities. The spectral features of escaping O-mode waves are very similar to those observed in experiments. The frequency components of Z-mode waves, trapped in the region between the O-and Z-mode cutoffs show strongly asymmetric and downshifted spectra.

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