Ion thermal effects on E-region instabilities: linear theory

Dimant, Y. S.; Oppenheim, M. M.

doi:10.1016/j.jastp.2004.07.006

Cited by 62 publications

(150 citation statements)

References 28 publications

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“…2.2, this tilting can only be attributed to the ion thermal-driving mechanism . This suggests that the simplified BGK ion kinetic model employed here includes this mechanism automatically and hence can be successfully used in future theoretical efforts for modeling of not only the FB instability, but the ion-thermal instability (Kagan and Kelley, 2000;Dimant and Oppenheim, 2004) as well. In these simulations, we have modeled the FB instability at a high-latitude electrojet corresponding to B 0 =5×10 4 nT.…”

Section: Discussionmentioning

confidence: 99%

“…Janhunen, 1994;Oppenheim and Dimant, 2004;Oppenheim et al, 2008). Dimant and Oppenheim (2004) attributed this effect to the additional instability driving mechanism of the ion-thermal nature. Due to the periodic boundary conditions and finite box sizes, the allowed discrete values of the tilt angle, θ tilt , are constrained by θ tilt = arctan(N y /N x ) with integer N x,y , as discussed above.…”

Section: Runmentioning

confidence: 99%

“…In the two-fluid model (e.g. Dimant and Oppenheim, 2004, Eq. 1) with ion inertia but no electron inertia, to the zero-order accuracy density and potential perturbations are coupled by…”

Section: Two-fluid Linear Theorymentioning

confidence: 99%

“…Starting from the two pioneering papers by Farley (1963) and Buneman (1963), the linear theory of the FB instability has been developed for many years (Lee et al, 1971;Schmidt and Gary, 1973;Ossakow et al, 1975;Fejer et al, 1984;Dimant and Sudan, 1995a,b,c;Kissack et al, 1995;Kissack et al, 1997;St.-Maurice and Kissack, 2000;Drexler et al, 2002;Dimant and Oppenheim, 2004;Kagan and St.-Maurice, 2004;Drexler and St. Maurice, 2005;Kissack et al, 2008a,b). This theory, however, has limited applications.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of the Farley-Buneman instability in the E-region ionosphere: a new hybrid approach

2008

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Abstract.A novel approach to nonlinear simulations of the Farley-Buneman (FB) instability in the E-region ionosphere is developed. The mathematical model includes a fluid description of electrons and a simplified kinetic description of ions based on a kinetic equation with the Bhatnagar-GrossCrook (BGK) collision term. This hybrid model takes into account all major factors crucial for development and nonlinear stabilization of the instability (collisional drag forces, ion inertia and Landau damping, dominant electron nonlinearity, etc.). At the same time, these simulations are free of noises caused by the finite number of particles and may require less computer resources than particle-in-cell (PIC) or hybridsemi-fluid semi-PIC -simulations. First results of 2-D simulations are presented which agree reasonably well with those of previous 2-D PIC simulations. One of the potentially useful applications of the novel computational approach is modeling of the FB instability not far from its threshold.

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Section: Discussionmentioning

confidence: 99%

Section: Runmentioning

confidence: 99%

“…In the two-fluid model (e.g. Dimant and Oppenheim, 2004, Eq. 1) with ion inertia but no electron inertia, to the zero-order accuracy density and potential perturbations are coupled by…”

Section: Two-fluid Linear Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling of the Farley-Buneman instability in the E-region ionosphere: a new hybrid approach

2008

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“…Secondly, the electron mass is larger than the physical value, and this too is chosen to maximize computational resources. Using heavy electrons is a common approach in PIC simulations, and we stayed within suggested limits [Dimant and Oppenheim, 2004]. The electron's mass's effect was studied and is discussed below.…”

Section: Detailed Discussionmentioning

confidence: 99%

First Kinetic Simulations of Equatorial Spread-F - Analysis of Kilometer-to-Meter Scale Irregularities

Oppenheim¹,

Tambouret²,

Dimant³

2012

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Toward an integrated view of ionospheric plasma instabilities: Altitudinal transitions and strong gradient case

Makarevich

2016

JGR Space Physics

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A general dispersion relation is derived that integrates the Farley‐Buneman, gradient‐drift, and current‐convective plasma instabilities (FBI, GDI, and CCI) within the same formalism for an arbitrary altitude, wave propagation vector, and background density gradient. The limiting cases of the FBI/GDI in the E region for nearly field‐aligned irregularities, GDI/CCI in the main F region at long wavelengths, and GDI at high altitudes are successfully recovered using analytic analysis. Numerical solutions are found for more general representative cases spanning the entire ionosphere. It is demonstrated that the results are consistent with those obtained using a general FBI/GDI/CCI theory developed previously at and near E region altitudes under most conditions. The most significant differences are obtained for strong gradients (scale lengths of 100 m) at high altitudes such as those that may occur during highly structured soft particle precipitation events. It is shown that the strong gradient case is dominated by inertial effects and, for some scales, surprisingly strong additional damping due to higher‐order gradient terms. The growth rate behavior is examined with a particular focus on the range of wave propagations with positive growth (instability cone) and its transitions between altitudinal regions. It is shown that these transitions are largely controlled by the plasma density gradients even when FBI is operational.

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Ion thermal effects on E-region instabilities: linear theory

Cited by 62 publications

References 28 publications

Modeling of the Farley-Buneman instability in the E-region ionosphere: a new hybrid approach

Modeling of the Farley-Buneman instability in the E-region ionosphere: a new hybrid approach

First Kinetic Simulations of Equatorial Spread-F - Analysis of Kilometer-to-Meter Scale Irregularities

Toward an integrated view of ionospheric plasma instabilities: Altitudinal transitions and strong gradient case

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