Kinetic Alfve‘n wave in the inhomogeneous magnetosphere and general distribution function

Dwivedi, Ashutosh; Varma, P.; Tiwari, Meenakshi

doi:10.1016/s0032-0633(01)00008-3

Cited by 16 publications

(11 citation statements)

References 61 publications

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“…The dispersion relation of kinetic Alfven wave is similar to that derived by Lysak [16]; Lysak and Song [20] under the approximation, V die = 0 using kinetic approach and more accurate that presented by Baronia and Tiwari [22]; Dwivedi et al [23] using particle aspect analysis. Baronia and Tiwari [22]; Dwivedi et al [23] have included other wave modes in their dispersion relation thus it is not similar to that derived by Lysak [16]; Lysak and Song [20] using kinetic approach.…”

Section: Dispersion Relationsupporting

confidence: 82%

“…Baronia and Tiwari [22]; Dwivedi et al [23] have included other wave modes in their dispersion relation thus it is not similar to that derived by Lysak [16]; Lysak and Song [20] using kinetic approach. Furthermore, Baronia and Tiwari [21] and Dwivedi et al [23] have not presented different calculations for warm and cold electron limit, the dispersion relation is derived for warm electron limit whereas parallel and perpendicular current densities are presented with cold electron limit. The dispersion relation given in "Equation (1)" for kinetic Alfven waves includes full kinetic effects of ions and electrons in homogeneous plasma by particle aspect approach and may be very useful for transition region where both effects are important as observed by Polar/Hydra [30] …”

Section: Dispersion Relationmentioning

confidence: 88%

“…Following the procedure as described by Baronia and Tiwari [22]; Dwivedi et al [23], the energy density per unit wave length of resonant electrons is given as 2 2 2 2 2 1 3 3 2 2 π exp 8π…”

Section: Current Densitymentioning

confidence: 99%

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Electron Beam Effects on Kinetic Alfven Waves in the Plasma Sheet Boundary Layer

Shrivastava¹,

Shrivastava²

2014

OALib

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This work studies the effect of earthward electron beam on kinetic Alfven wave in plasma sheet boundary layer (PSBL). The particle aspect approach is adopted to investigate the trajectories of charged particles in the electromagnetic field of kinetic Alfven wave. Expressions are found for the dispersion relation, growth/damping-rate and associated currents in the presence of electron beam in homogenous plasma. Kinetic effects of electrons and ions are included to study kinetic Alfven wave because both are important in the transition region. The plasma parameters appropriate to plasma sheet boundary layer are used. It is found that downward electron beam affects the dispersion relation, growth/damping-rate and associated currents in both cases (warm and cold electron limit).

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Section: Dispersion Relationsupporting

confidence: 82%

Section: Dispersion Relationmentioning

confidence: 88%

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Electron Beam Effects on Kinetic Alfven Waves in the Plasma Sheet Boundary Layer

Shrivastava¹,

Shrivastava²

2014

OALib

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“…Plasma in mirror-like devices and in the auroral region with curved and converging field lines, depart considerably from a Maxwellian distribution and have a steep losscone distribution (Dwivedi et al, 2001a;Duan et al, 2005). In this paper we will discuss the effect of the general losscone distribution function on the EMIC waves in the presence of ion beams and thermal anisotropy.…”

Section: Introductionmentioning

confidence: 99%

“…The method adopted, known as particle analysis, has been widely used in the analysis of electrostatic and electromagnetic instabilities (Tiwari and Varma,1991;Dwivedi et al, 2001aDwivedi et al, , b, 2002Duan et al, 2005;Mishra and Tiwari, 2006;Ahirwar et al, 2006). The relative importance of this approach over fluid and kinetic approachs is also discussed Tiwari, 1992, 1993;Tiwari and Varma, 1993).…”

Section: Introductionmentioning

confidence: 99%

Beam effect on electromagnetic ion-cyclotron waves with general loss – cone distribution function in an anisotropic plasma-particle aspect analysis

2007

Self Cite

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Abstract. The effect of upgoing ion beam and temperature anisotropy on the dispersion relation, growth rate, parallel and perpendicular resonant energies, and marginal instability of the electromagnetic ion cyclotron (EMIC) waves, with general loss-cone distribution function, in a low β homogeneous plasma, is discussed by investigating the trajectories of the charged particles. The whole plasma is considered to consist of resonant and non-resonant particles. The resonant particles participate in an energy exchange with the waves, whereas the non-resonant particles support the oscillatory motion of the waves. The effects of the steepness of the loss-cone distribution, ion beam velocity, with thermal anisotropy on resonant energy transferred, and the growth rate of the EMIC waves are discussed. It is found that the effect of the upgoing ion beam is to reduce the energy of transversely heated ions, whereas the thermal anisotropy acts as a source of free energy for the EMIC waves and enhances the growth rate. It is found that the EMIC wave emissions occur by extracting energy of perpendicularly heated ions in the presence of an upflowing ion beam and a steep loss-cone distribution function in the anisotropic magnetoplasma. The effect of the steepness of the loss-cone is also to enhance the growth rate of the EMIC waves. The results are interpreted for EMIC emissions in the auroral acceleration region.

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Effect of ion and electron beam on kinetic Alfven wave in an inhomogeneous magnetic field

Dwivedi¹,

Kumar²,

Tiwari

2013

Astrophys Space Sci

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Kinetic Alfve‘n wave in the inhomogeneous magnetosphere and general distribution function

Cited by 16 publications

References 61 publications

Electron Beam Effects on Kinetic Alfven Waves in the Plasma Sheet Boundary Layer

Electron Beam Effects on Kinetic Alfven Waves in the Plasma Sheet Boundary Layer

Beam effect on electromagnetic ion-cyclotron waves with general loss – cone distribution function in an anisotropic plasma-particle aspect analysis

Effect of ion and electron beam on kinetic Alfven wave in an inhomogeneous magnetic field

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