Excitation of lower hybrid waves by a gyrating ion beam in a magnetized plasma cylinder

1988 ◽  
Vol 31 (6) ◽  
pp. 1738 ◽  
Author(s):  
Anamika Sharma ◽  
V. K. Tripathi
Keyword(s):  
Ion Beam ◽  
Magnetized Plasma ◽  
Lower Hybrid ◽  
Plasma Cylinder ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

Alfvén’s Critical Velocity Effect Tested in Space

1982 ◽  
Vol 37 (8) ◽  
pp. 728-735 ◽  
Author(s):  
Gerhard Haerendel
Keyword(s):  
Critical Velocity ◽  
Ion Beam ◽  
Sounding Rocket ◽  
Lower Hybrid ◽  
Beam Plasma ◽  
Velocity Effect ◽  
Hybrid Waves ◽  
Lower Hybrid Waves ◽  
Theoretical Considerations ◽  
Upper Ionosphere

A sounding rocket experiment involving the injection of a barium gas jet in the upper ionosphere provided an opportunity of investigating quantitatively several aspects of the beam-plasma interaction that is the substance of Alfven’s critical velocity effect. Whereas the experimental data are presented elsewhere, this paper contains some theoretical considerations of (1) the limiting neutral density for which the ionization process can operate, (2) the interaction of the freshly injected ions with the background plasma, and (3) the microprocess which leads to collisionless electron tail formation. The observed distribution of injected ions is consistent with the Townsend condition on the beam-plasma discharge. The mass loading on the ambient plasma, although locally high, has a weak effect on the dynamics of the involved flux-tube because of the limited extent of the beam. The most likely process by which energy is transferred from the freshly generated ions to the electrons is an ion beam instability leading to the excitation of lower hybrid waves

Ion-beam driven lower hybrid waves in a magnetized dusty plasma

2013 ◽  
Vol 20 (6) ◽  
pp. 063701 ◽  
Author(s):  
Ved Prakash ◽  
Vijayshri ◽  
Suresh C. Sharma ◽  
Ruby Gupta
Keyword(s):  
Dusty Plasma ◽  
Ion Beam ◽  
Lower Hybrid ◽  
Magnetized Dusty Plasma ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

scholarly journals Resonant three-wave interaction in the presence of suprathermal electron fluxes

2004 ◽  
Vol 22 (6) ◽  
pp. 2171-2179 ◽  
Author(s):  
C. Krafft ◽  
A. Volokitin
Keyword(s):  
Electron Distribution Function ◽  
Wave Interaction ◽  
Magnetized Plasma ◽  
Lower Hybrid ◽  
Particle Interactions ◽  
Wave Interactions ◽  
Suprathermal Electron ◽  
Hybrid Waves ◽  
The Waves ◽  
Lower Hybrid Waves

Abstract. A theoretical and numerical model is presented which describes the nonlinear interaction of lower hybrid waves with a non-equilibrium electron distribution function in a magnetized plasma. The paper presents some relevant examples of numerical simulations which show the nonlinear evolution of a set of three waves interacting at various resonance velocities with a flux of electrons presenting some anisotropy in the parallel velocity distribution (suprathermal tail); in particular, the case when the interactions between the waves are neglected (for sufficiently small waves' amplitudes) is compared to the case when the three waves follow a resonant decay process. A competition between excitation (due to the fan instability with tail electrons or to the bump-in-tail instability at the Landau resonances) and damping processes (involving bulk electrons at the Landau resonances) takes place for each wave, depending on the strength of the wave-wave coupling, on the linear growth rates of the waves and on the modifications of the particles' distribution resulting from the linear and nonlinear wave-particle interactions. It is shown that the energy carried by the suprathermal electron tail is more effectively transfered to lower energy electrons in the presence of wave-wave interactions.

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.

Nonlinear structures of lower-hybrid waves driven by the ion beam

2018 ◽  
Vol 25 (6) ◽  
pp. 061209 ◽  
Author(s):  
O. Koshkarov ◽  
A. I. Smolyakov ◽  
A. Kapulkin ◽  
Y. Raitses ◽  
I. Kaganovich
Keyword(s):  
Ion Beam ◽  
Lower Hybrid ◽  
Nonlinear Structures ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

scholarly journals Erratum: “Excitation of lower hybrid waves by a density modulated electron beam in a plasma cylinder” [Phys. Plasmas 5, 3161 (1998)]

1999 ◽  
Vol 6 (4) ◽  
pp. 1385-1385
Author(s):  
Suresh C. Sharma ◽  
M. P. Sirvastava ◽  
M. Sugawa ◽  
V. K. Tripathi
Keyword(s):  
Electron Beam ◽  
Lower Hybrid ◽  
Plasma Cylinder ◽  
Hybrid Waves ◽  
Lower Hybrid Waves

Excitation of lower hybrid waves by a gyrating ion beam in a negative ion plasma

2013 ◽  
Vol 20 (3) ◽  
pp. 033706 ◽  
Author(s):  
Jyotsna Sharma ◽  
Suresh C. Sharma ◽  
V. K. Jain ◽  
Ajay Gahlot
Keyword(s):  
Ion Beam ◽  
Negative Ion ◽  
Lower Hybrid ◽  
Ion Plasma ◽  
Hybrid Waves ◽  
Lower Hybrid Waves
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