Effects of He+ and O+ ions on kinetic Alfvén waves: application to PSBL region

Tamrakar, Radha; Varma, P.; Tiwari, Meenakshi

doi:10.1007/s10509-018-3443-6

Cited by 2 publications

(3 citation statements)

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“…So, it is not possible to study the effect of electrons in the complete absence of multi-ions. Recently, kinetic Alfvén wave propagation in multi-ions plasma has been considered by Tamrakar et al (2018aTamrakar et al ( , 2018bTamrakar et al ( , 2018c. This paper goes beyond the previous investigations and demonstrate the behaviour of inertial Alfvén waves in the presence of H + , He + and O + ions dominated background plasma in auroral acceleration region.…”

Section: Introductionmentioning

confidence: 58%

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Inertial Alfvén waves in auroral acceleration region with H+, He+ and O+ ions plasma

Tamrakar

Varma

Tiwari

2019

Astrophys Space Sci

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The propagation of inertial Alfvén wave is investigated in cold, low-β, homogeneous and bi-Maxwellian plasma consisting of multi-ions (H + , He + and O + ). Kinetic approach is adopted to derive the dispersion relation, damping rate, group velocity and growth/ damping length of the wave. Figures are exhibited with respect to ck ⊥ /ω pe . Effects of density variation with multi-ions are analysed on frequency, damping rate, parallel and perpendicular components of group velocity and growth/ damping length of the inertial Alfvén wave. It is found that varying densities of multi-ions significantly influence the frequency, damping rate and group velocity of inertial Alfvén wave. The wave frequency is observed between 0.5 to 18 s −1 pertaining to observational data. The increasing density of heavy ions reduces the frequency of waves. The presence of He + and O + enhances the damping of wave showing more transfer of energy from wave to particles leading to increase in electron acceleration. The order of parallel and perpendicular group velocity is found to be 10 9 cm/s and 10 5 cm/s respectively. Maximum perpendicular growth length is observed corresponding to the minimum damping rate of wave at ck ⊥ /ω pe < 1, signifying the dynamics in transverse direction to the magnetic field which are more significant in the present analysis. The parameters relevant to auroral acceleration region are used for graphical analysis. The applications of present study may be towards the electron acceleration in the dynamics of auroral acceleration region consisting of heavy ions in background plasma.

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Section: Introductionmentioning

confidence: 58%

“…Here, we have considered the collisionless, homogeneous, low beta (β m e /m i ) plasma with external magnetic field B 0 along z-direction. The basic dispersion tensor elements D xx (k, ω), D xz (k, ω), D zx (k, ω) and D zz (k, ω) of kinetic theory (Lysak and Lotko 1996;Tamrakar et al 2018aTamrakar et al , 2018c are used as,…”

Section: Mathematical Modelmentioning

confidence: 99%

Inertial Alfvén waves in auroral acceleration region with H+, He+ and O+ ions plasma

Tamrakar

Varma

Tiwari

2019

Astrophys Space Sci

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“…[1][2][3][4][5] In recent years, extensive research has been conducted on multi-ion plasmas in order to investigate various nonlinear structures. For instance, several researchers have studied ion cyclotron waves, [6][7][8][9][10] kinetic Alfvén waves, [11][12][13][14][15] electrostatic ion-cyclotron waves, [16] inertial Alfvén waves, [17] and oscillitons [18] in multi-ion plasmas containing three positive ion species that occur in various regions of the earth's magnetosphere.…”

Section: Introductionmentioning

confidence: 99%

Self‐organization of earth's inner magnetospheric multi‐ion plasma

Shazad,

Iqbal

2024

Contrib. Plasma Phys

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The self‐organization of a magnetized multi‐ion plasma, composed of inertialess electrons and inertial H+, He+, and O+ ions, leads to the formation of quadruple Beltrami (QB) field structures. The QB self‐organized state is a linear combination of four single Beltrami fields, and it is a non‐force‐free state that shows strong magnetofluid coupling. Moreover, the QB state is characterized by four relaxed state structures of different length scales. The investigation reveals that the generalized helicities of plasma species and the densities of ion species have a significant impact on the characteristics of the self‐organized vortices in the QB state. The study also highlights the potential consequences of QB field structures on earth's inner magnetosphere, including diamagnetic and paramagnetic trends as well as heating effects resulting from disparate length scales.

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Effects of He+ and O+ ions on kinetic Alfvén waves: application to PSBL region

Cited by 2 publications

References 60 publications

Inertial Alfvén waves in auroral acceleration region with H+, He+ and O+ ions plasma

Inertial Alfvén waves in auroral acceleration region with H+, He+ and O+ ions plasma

Self‐organization of earth's inner magnetospheric multi‐ion plasma

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