Lower-hybrid wave generation in an electron beam of finite transverse dimension

1989 ◽  
Vol 41 (1) ◽  
pp. 119-137 ◽  
Author(s):  
G. B. Crew
Keyword(s):  
Electron Beam ◽  
Transverse Dimension ◽  
Beam Current ◽  
Lower Hybrid ◽  
Lower Hybrid Wave ◽  
Field Geometry ◽  
Hybrid Waves ◽  
Limiting Case ◽  
Lower Hybrid Waves

The generation of lower-hybrid waves in an inhomogeneous electron beam is examined. Wave amplitudes are invariably limited by the convective nature of the instability. The self-consistent shear of the magnetic-field geometry due to the beam current is limited to the role of dividing the general problem into separate cases according to the relative orientation of the wave vector and direction of inhomogeneity. Moreover, the limiting case of small shear is smoothly connected to the case where shear is altogether negligible. Estimates of the amplification of lower-hybrid waves propagating across the electron beam are made for the various cases.

Excitation of lower hybrid waves by electron beams in finite geometry plasmas. Part 2. Surface waves

1978 ◽  
Vol 19 (2) ◽  
pp. 295-299
Author(s):  
Réal R. J. Gagné ◽  
Magdi M. Shoucri
Keyword(s):  
Electron Beam ◽  
Surface Waves ◽  
Electron Beams ◽  
Low Frequency ◽  
Finite Geometry ◽  
Dispersion Relations ◽  
Lower Hybrid ◽  
Small Density ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

The dispersion relations for the quasi-static lower hybrid surface waves are derived. Conditions for their existence and their linear excitation by a small density electron beam are discussed. Instabilities appearing in low-frequency surface waves are also discussed.

scholarly journals Role of lower hybrid waves in ion heating at dipolarization fronts

2017 ◽  
Vol 122 (5) ◽  
pp. 5092-5104 ◽  
Author(s):  
A. Greco ◽  
A. Artemyev ◽  
G. Zimbardo ◽  
V. Angelopoulos ◽  
A. Runov
Keyword(s):  
Lower Hybrid ◽  
Ion Heating ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

Excitation of lower hybrid waves by electron beams in finite geometry plasmas. Part 1. Body waves

1978 ◽  
Vol 19 (2) ◽  
pp. 281-294 ◽  
Author(s):  
Magdi M. Shoucri ◽  
Réal R. J. Gagné
Keyword(s):  
Electron Beam ◽  
Electron Beams ◽  
Finite Geometry ◽  
Body Waves ◽  
Lower Hybrid ◽  
Hot Electron ◽  
Cold Electron ◽  
Small Density ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

The quasi-static lower hybrid eigenmodes of a plasma column in a cylindrical waveguide are determined, and their linear excitation by a small density electron beam is discussed for the cases of a hot electron beam as well as for a cold electron beam. It is shown that under certain conditions, finite geometry effects introduce important quantitative and qualitative differences with respect to the results obtained in an infinite geometry.

scholarly journals Modified Dust-Lower-Hybrid Waves in Quantum Plasma

2018 ◽  
Vol 2 (2) ◽  
pp. 11-21
Author(s):  
Abdul Rauf ◽  
I. Zeba ◽  
Muhammad Saqlain
Keyword(s):  
Dusty Plasma ◽  
Graphical Analysis ◽  
Quantum Plasma ◽  
Lower Hybrid ◽  
Hybrid Wave ◽  
Lower Hybrid Wave ◽  
Quantum Hydrodynamic Model ◽  
Fermi Temperature ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

Dust-lower-hybrid waves in quantum plasma have been studied. The dispersion relation of the dust-lower-hybrid wave has been examined using the quantum hydrodynamic model of plasma in an ultra-cold Fermi dusty plasma in the presence of a uniform external magnetic field. Graphical analysis shows that the electron Fermi temperature effect and the quantum corrections give rise to significant effects on the dust-lower-hybrid wave of the magnetized quantum dusty plasma.

On the filamentation of large amplitude lower-hybrid waves

1977 ◽  
Vol 18 (1) ◽  
pp. 165-172 ◽  
Author(s):  
K. H. Spatschek ◽  
P. K. Shukla ◽  
M. Y. Yu
Keyword(s):  
Large Amplitude ◽  
Low Frequency ◽  
Lower Hybrid ◽  
Hybrid Wave ◽  
Lower Hybrid Wave ◽  
Convective Instabilities ◽  
Modulational Instabilities ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

We consider the propagation of a large-amplitude lower-hybrid wave. Modulational instabilities arising from its interaction with low-frequency electrostatic perturbations are investigated. The growth lengths of the convective instabilities are obtained and compared with previous results for adiabatic perturbations.

scholarly journals Lower-hybrid waves generated by anomalous Doppler resonance in auroral plasmas

2010 ◽  
Vol 76 (3-4) ◽  
pp. 539-546 ◽  
Author(s):  
R. BINGHAM ◽  
R. A. CAIRNS ◽  
I. VORGUL ◽  
V. D. SHAPIRO
Keyword(s):  
Modulational Instability ◽  
Energetic Electron ◽  
Magnetized Plasma ◽  
Space Plasmas ◽  
Lower Hybrid ◽  
Transfer Energy ◽  
Lower Hybrid Wave ◽  
Electrons And Ions ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

AbstractThis paper describes some aspects of lower-hybrid wave activity in space plasmas. Lower-hybrid waves are particularly important since they can transfer energy efficiently between electrons and ions in a collisionless magnetized plasma. We consider the ‘fan’ or anomalous Doppler resonance instability driven by energetic electron tails and show that it is responsible for the generation of lower-hybrid waves. We also demonstrate that observations of their intensity are sufficient to drive the modulational instability.

scholarly journals Particle acceleration in tangential discontinuities by lower hybrid waves

2002 ◽  
Vol 9 (2) ◽  
pp. 121-124 ◽  
Author(s):  
D. Spicer ◽  
R. Bingham ◽  
J. Huba ◽  
V. D. Shapiro
Keyword(s):  
Wave Turbulence ◽  
Lower Hybrid ◽  
Hybrid Wave ◽  
Lower Hybrid Wave ◽  
Electrons And Ions ◽  
Collisionless Reconnection ◽  
Hybrid Waves ◽  
Drift Instability ◽  
The Waves ◽  
Lower Hybrid Waves

Abstract. We consider the role that the lower-hybrid wave turbulence plays in providing the necessary resistivity at collisionless reconnection sights. The mechanism for generating the waves is considered to be the lower-hybrid drift instability. We find that the level of the wave amplitude is sufficient enough to heat and accelerate both electrons and ions.

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