Whistler waves produced by a modulated spiraling electron beam: Linear approach

Krafft, C.; Volokitin, A. S.

doi:10.1063/1.871768

Cited by 10 publications

(8 citation statements)

References 18 publications

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“…In our previous works, [23][24][25] we solve Eqs. ͑1͒-͑3͒ in the approximation of a fixed modulated beam with boundary conditions appropriate to waves going out to infinity.…”

Section: ͑3͒mentioning

confidence: 99%

“…The equations of potentials evolution have been derived from the Maxwell equations in our previous works [23][24][25] and they are…”

Section: A Wave Equationsmentioning

confidence: 99%

“…The Bessel function J 1 (k i r b ) in ͑4͒-͑5͒ is introduced here for analogy with the case of fixed beam modulation, [23][24][25] where the ⌽ i (r,z) are constant and ␦⌽ i (r,z)ϭ0.…”

Section: B Whistler Waves Outside the Beammentioning

confidence: 99%

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Whistler waves emission by a modulated electron beam: Nonlinear theory

Volokitin

Krafft

1997

Physics of Plasmas

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The nonlinear theory for the interaction of a thin modulated electron beam with a monochromatic whistler wave is considered. On the basis of wave field structures calculated previously in the linear approach, equations describing the wave amplitude evolution inside and outside the beam are obtained. These equations, together with the equations for particle motion in the drift approximation, form the self-consistent nonlinear model. Double and single pole resonance cases are considered. The full system of equations (taking into account the finite size of the beam) is resolved by a computer code which yields clear physical results. This code avoids the heavy structure and the long computer time inherent in the usual Particle-In-Cell simulation codes.

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“…In our previous works, [23][24][25] we solve Eqs. ͑1͒-͑3͒ in the approximation of a fixed modulated beam with boundary conditions appropriate to waves going out to infinity.…”

Section: ͑3͒mentioning

confidence: 99%

“…The equations of potentials evolution have been derived from the Maxwell equations in our previous works [23][24][25] and they are…”

Section: A Wave Equationsmentioning

confidence: 99%

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Whistler waves emission by a modulated electron beam: Nonlinear theory

Volokitin

Krafft

1997

Physics of Plasmas

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“…They showed that an appreciable fraction of the initial kinetic energy of artificially modulated injected beams can be spontaneously radiated in a coherent way and found that electromagnetic waves can be significantly excited by electron beams. Krafft et al 17 have done the study of the energy transfer between the modulated spiraling electron beam and the whistler wave. Krafft et al 18 have studied emission of whistler waves by a density modulated electron beam in a laboratory plasma and results have been compared to the excitation by loop antenna.…”

Section: Introductionmentioning

confidence: 99%

“…There has been a great deal of interest in studying electrostatic 14 and electromagnetic [15][16][17][18][19] waves by modulated electron beams. Sharma et al 14 have examined the effect of beam density modulation on excitation of lower hybrid waves in a magnetized plasma cylinder.…”

Section: Introductionmentioning

confidence: 99%

Effect of beam premodulation on excitation of surface plasma waves in a magnetized plasma

2010

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A density modulated electron beam propagating through a vacuum magnetized plasma interface drives electromagnetic surface plasma waves (SPWs) to instability via Cerenkov and fast cyclotron interaction. Numerical calculations of the growth rate and unstable mode frequencies have been carried out for the typical parameters of the SPWs. The growth rate γ of the unstable wave instability increases with the modulation index (Δ) and is maximized for Δ=1. For Δ=0, γ turns out to be ∼4.32×1010 rad/s for Cerenkov interaction and ∼6.81×1010 rad/s for fast cyclotron interaction. The growth rate of the instability increases with the beam density and scales as one-third power of the beam density in Cerenkov interaction and is proportional to the square root of beam density in fast cyclotron interaction. In addition, the real frequency of the unstable wave increases with the beam-energy and scales as almost one-half power of the beam-energy.

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Whistler Wave Emission from a Modulated Electron Beam in a Collisional Magnetoplasma in the Presence of a Density Duct

Zaboronkova

Krafft

Kudrin

et al. 2005

Radiophys Quantum Electron

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UDC 533.951We study the radiation from a modulated electron beam injected along the axis of a cylindrical density duct in a magnetoplasma. An expression for the average power lost by the beam at the modulation frequency is obtained and analyzed. It is shown that in the case ofČerenkov resonance of the beam with a weakly damped whistler mode of an enhanced-density duct, a noticeable increase in this power is possible compared with the case where the beam is injected in a homogeneous background magnetoplasma. Based on the results of numerical calculations performed for conditions of the Earth's ionosphere, we give estimates of an increase in the power radiated from the beam in the whistler frequency range in the presence of a cylindrical duct with enhanced density.

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Whistler waves produced by a modulated spiraling electron beam: Linear approach

Cited by 10 publications

References 18 publications

Whistler waves emission by a modulated electron beam: Nonlinear theory

Whistler waves emission by a modulated electron beam: Nonlinear theory

Effect of beam premodulation on excitation of surface plasma waves in a magnetized plasma

Whistler Wave Emission from a Modulated Electron Beam in a Collisional Magnetoplasma in the Presence of a Density Duct

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