scholarly journals Ray trajectories of lower hybrid solitary structures

2003 ◽  
Vol 108 (A5) ◽  
Author(s):  
P. W. Schuck ◽  
J. W. Bonnell
Keyword(s):  
Lower Hybrid ◽  
Solitary Structures ◽  
Ray Trajectories

Ergodic behavior of lower hybrid decay wave ray trajectories in toroidal geometry

1978 ◽  
Vol 21 (12) ◽  
pp. 2263 ◽  
Author(s):  
Jean-Marie Wersinger ◽  
Edward Ott ◽  
John M. Finn
Keyword(s):  
Lower Hybrid ◽  
Wave Ray ◽  
Ergodic Behavior ◽  
Ray Trajectories ◽  
Toroidal Geometry

A review of lower hybrid solitary structures

2003 ◽  
Vol 31 (6) ◽  
pp. 1125-1177 ◽  
Author(s):  
P.W. Schuck ◽  
J.W. Bonnell ◽  
P.M. Kintner
Keyword(s):  
Lower Hybrid ◽  
Solitary Structures

scholarly journals Theory, simulation, and observation of discrete eigenmodes associated with lower hybrid solitary structures

1998 ◽  
Vol 103 (A4) ◽  
pp. 6935-6953 ◽  
Author(s):  
P. W. Schuck ◽  
C. E. Seyler ◽  
J.-L. Pinçon ◽  
J. W. Bonnell ◽  
P. M. Kintner
Keyword(s):  
Lower Hybrid ◽  
Solitary Structures

scholarly journals Observation and analysis of lower hybrid solitary structures as rotating eigenmodes

1997 ◽  
Vol 102 (A8) ◽  
pp. 17283-17296 ◽  
Author(s):  
J. L. Pinçon ◽  
P. M. Kintner ◽  
P. W. Schuck ◽  
C. E. Seyler
Keyword(s):  
Lower Hybrid ◽  
Solitary Structures

scholarly journals Formation of lower-hybrid solitary structures by modulational interaction between lower-hybrid and dispersive Alfvén waves

2009 ◽  
Vol 27 (3) ◽  
pp. 1027-1033 ◽  
Author(s):  
J. O. Hall ◽  
G. Stenberg ◽  
A. I. Eriksson ◽  
M. André
Keyword(s):  
Numerical Solutions ◽  
Modulational Instability ◽  
Alfven Waves ◽  
Alfvén Waves ◽  
Lower Hybrid ◽  
Plasma Parameters ◽  
Thermal Electron ◽  
Cavity Collapse ◽  
Solitary Structures ◽  
Modulational Interaction

Abstract. We investigate the possibility that lower-hybrid solitary structures (LHSS), which are frequently observed in the Earth's ionosphere and magnetosphere, are formed as a result of a modulational interaction between lower-hybrid and dispersive Alfvén waves of initially small amplitude. A large amplitude lower-hybrid pump wave can excite density structures with length scales transverse to the geomagnetic field of the order of the ion gyroradius via a modulational instability. The structure formation in the nonlinear stage of the instability is investigated by numerical solutions of the governing equations, using plasma parameters relevant for LHSS observations in the upper ionosphere and in the magnetosphere. The numerical solutions reveal that the lower-hybrid waves become self-localized inside cylindrically symmetric (with respect to the ambient magnetic field) density cavities, in qualitative agreement with observations. Our model includes thermal electron effects but shows no stabilization at the ion sound gyroradius, suggesting that any preference of observed LHSS for that perpendicular scale likely is due to processes arresting the cavity collapse.

Nonlinear kinetic model for lower-hybrid solitary structures

2007 ◽  
Vol 14 (8) ◽  
pp. 082901 ◽  
Author(s):  
D. Jovanović ◽  
P. K. Shukla ◽  
G. Morfill
Keyword(s):  
Kinetic Model ◽  
Lower Hybrid ◽  
Solitary Structures ◽  
Nonlinear Kinetic

Modified electron whistler dispersion law

2002 ◽  
Vol 67 (2-3) ◽  
pp. 149-161 ◽  
Author(s):  
B. V. LUNDIN ◽  
C. KRAFFT
Keyword(s):  
Cold Plasma ◽  
Wave Dispersion ◽  
Plasma Electron ◽  
Lower Hybrid ◽  
Analytical Treatment ◽  
Dispersion Law ◽  
Wide Range ◽  
Lightning Discharges ◽  
Ray Trajectories ◽  
Dynamical Spectra

A modified electron whistler dispersion law is derived in the cold-plasma approximation for analytical treatment and simplified numerical calculations of wave propagation in a wide range of ratios ωc/ωp of electron gyro- to plasma frequencies if the wave frequency is much less than ωp. The net contribution of ions to the wave dispersion law is expressed through the value of the lower-hybrid resonance frequency ωlhr only. This approximate dispersion law is valid in a wide frequency domain, that is, from the range of ωlhr until the domain where the contribution of ions can be neglected. A comparison of geometrical-optics ray trajectories calculated by the use of modified and total cold-plasma electron whistler dispersion laws is presented for the case of the Earth's plasma environment. Computer simulations of dynamical spectra of whistler waves excited by lightning discharges and registered in remote regions of the Earth's plasmasphere reveal good numerical stability of the developed ray-tracing code.

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