Whistler waves in space and laboratory plasmas

Stenzel, R. L.

doi:10.1029/1998ja900120

Cited by 131 publications

(90 citation statements)

References 186 publications

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“…The linear relation betweenB and r ÂB shows that whistler waves involve magnetic helicity, can have a vortex structure, 2 and have a mathematical similarity to force-free magnetic fields. 14 The whistler wave dispersion relation results from operating on Eq.…”

Section: Whistler Wave Current As a Consequence Of Electron E3b Dmentioning

confidence: 99%

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Circular polarization of obliquely propagating whistler wave magnetic field

Bellan

2013

Physics of Plasmas

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The circular polarization of the magnetic field of obliquely propagating whistler waves is derived using a basis set associated with the wave partial differential equation. The wave energy is mainly magnetic and the wave propagation consists of this magnetic energy sloshing back and forth between two orthogonal components of magnetic field in quadrature. The wave electric field energy is small compared to the magnetic field energy. V C 2013 AIP Publishing LLC.

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Section: Whistler Wave Current As a Consequence Of Electron E3b Dmentioning

confidence: 99%

“…2,11 The textbook derivation of whistler waves shows that the wave electric field is right-hand circularly polarized when the propagation wavevector is parallel to the background magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Circular polarization of obliquely propagating whistler wave magnetic field

Bellan

2013

Physics of Plasmas

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“…Electromagnetic whistler turbulence in the intermediate frequency range, ⍀ i Ӷ Ӷ⍀ e , where ⍀ i͑e͒ are ion ͑electron͒ gyrofrequency, continues to be of interest to ionospheric, 1,2 magnetospheric, and solar wind plasmas [3][4][5] as well as to laboratory plasmas. 6,7 The purpose of this article is to show that the dominant nonlinear ͑NL͒ effect makes whistler turbulence in a low ␤ plasma, similar to that found in the near-earth space environment, a three-dimensional ͑3D͒ phenomenon in which the evolution of the turbulence is characterized by induced NL scattering. NL scattering arises due to a slow density perturbation resulting from the ponderomotive force acting along the ambient magnetic field lines.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional character of whistler turbulence

et al. 2010

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It is shown that the dominant nonlinear effect makes the evolution of whistler turbulence essentially three dimensional in character. Induced nonlinear scattering due to slow density perturbation resulting from ponderomotive force triggers energy flux toward lower frequency. Anisotropic wave vector spectrum is generated by large angle scatterings from thermal plasma particles, in which the wave propagation angle is substantially altered but the frequency spectrum changes a little. As a consequence, the wave vector spectrum does not indicate the trajectory of the energy flux. There can be conversion of quasielectrostatic waves into electromagnetic waves with large group velocity, enabling convection of energy away from the region. We use a two-dimensional electromagnetic particle-in-cell model with the ambient magnetic field out of the simulation plane to generate the essential three-dimensional nonlinear effects.

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“…The interaction between a circularly polarized electromagnetic wave and a charged particle is important in many contexts, with important examples being magnetospheric whistler waves (chorus), [1][2][3][4][5][6][7][8][9][10][11] Alfv en waves, 12,13 helicon devices, 14,15 electron cyclotron masers, 16 whistler-mediated fast magnetic reconnection, [17][18][19] relativistic electron-positron plasmas, 20,21 and particle accelerators. [22][23][24] The interaction can change both the particle energy and pitch angle with the latter change leading to particle escape if the particle is in a magnetic mirror configuration such as Earth's dipole magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Pitch angle scattering of an energetic magnetized particle by a circularly polarized electromagnetic wave

Bellan

2013

Physics of Plasmas

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The interaction between a circularly polarized wave and an energetic gyrating particle is described using a relativistic pseudo-potential that is a function of the frequency mismatch. Analysis of the pseudo-potential provides a means for interpreting numerical results. The pseudo-potential profile depends on the initial mismatch, the normalized wave amplitude, and the initial angle between the wave magnetic field and the particle perpendicular velocity. For zero initial mismatch, the pseudopotential consists of only one valley, but for finite mismatch, there can be two valleys separated by a hill. A large pitch angle scattering of the energetic electron can occur in the two-valley situation but fast scattering can also occur in a single valley. Examples relevant to magnetospheric whistler waves show that the energetic electron pitch angle can be deflected 5 towards the loss cone when transiting a 10 ms long coherent wave packet having realistic parameters. V C 2013 AIP Publishing LLC [http://dx

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Whistler waves in space and laboratory plasmas

Cited by 131 publications

References 186 publications

Circular polarization of obliquely propagating whistler wave magnetic field

Circular polarization of obliquely propagating whistler wave magnetic field

Three dimensional character of whistler turbulence

Pitch angle scattering of an energetic magnetized particle by a circularly polarized electromagnetic wave

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