scholarly journals Nonlinear dynamics of large amplitude modes in a magnetized plasma

2014 ◽  
Vol 21 (12) ◽  
pp. 122301 ◽  
Author(s):  
G. Brodin ◽  
L. Stenflo
Keyword(s):  
Nonlinear Dynamics ◽  
Large Amplitude ◽  
Magnetized Plasma

scholarly journals Anomalous width variation of rarefactive ion acoustic solitary waves in the context of auroral plasmas

2004 ◽  
Vol 11 (2) ◽  
pp. 219-228 ◽  
Author(s):  
S. S. Ghosh ◽  
G. S. Lakhina
Keyword(s):  
Solitary Waves ◽  
Nonlinear Theory ◽  
Acoustic Waves ◽  
Large Amplitude ◽  
Magnetized Plasma ◽  
Amplitude Variation ◽  
Fully Nonlinear ◽  
Weakly Nonlinear ◽  
Ion Acoustic Solitary Waves ◽  
Ion Acoustic

Abstract. The presence of dynamic, large amplitude solitary waves in the auroral regions of space is well known. Since their velocities are of the order of the ion acoustic speed, they may well be considered as being generated from the nonlinear evolution of ion acoustic waves. However, they do not show the expected width-amplitude correlation for K-dV solitons. Recent POLAR observations have actually revealed that the low altitude rarefactive ion acoustic solitary waves are associated with an increase in the width with increasing amplitude. This indicates that a weakly nonlinear theory is not appropriate to describe the solitary structures in the auroral regions. In the present work, a fully nonlinear analysis based on Sagdeev pseudopotential technique has been adopted for both parallel and oblique propagation of rarefactive solitary waves in a two electron temperature multi-ion plasma. The large amplitude solutions have consistently shown an increase in the width with increasing amplitude. The width-amplitude variation profile of obliquely propagating rarefactive solitary waves in a magnetized plasma have been compared with the recent POLAR observations. The width-amplitude variation pattern is found to fit well with the analytical results. It indicates that a fully nonlinear theory of ion acoustic solitary waves may well explain the observed anomalous width variations of large amplitude structures in the auroral region.

Large amplitude solitary magnetized plasma waves

2005 ◽  
Vol 71 (05) ◽  
pp. 631 ◽  
Author(s):  
C.M.C. NAIRN ◽  
R. BINGHAM ◽  
J.E. ALLEN
Keyword(s):  
Large Amplitude ◽  
Plasma Waves ◽  
Magnetized Plasma

scholarly journals Large‐Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 2. Nonlinear Dynamics, Wave Breaking, and Instabilities

2019 ◽  
Vol 124 (17-18) ◽  
pp. 10006-10032 ◽  
Author(s):  
David C. Fritts ◽  
Ling Wang ◽  
Michael J. Taylor ◽  
Pierre‐Dominique Pautet ◽  
Neal R. Criddle ◽  
...  
Keyword(s):  
Nonlinear Dynamics ◽  
Wave Breaking ◽  
Large Amplitude ◽  
Mountain Waves

Large-amplitude circularly polarized electromagnetic waves in magnetized plasma

2014 ◽  
Vol 21 (5) ◽  
pp. 054501 ◽  
Author(s):  
I. Y. Vasko ◽  
A. V. Artemyev ◽  
L. M. Zelenyi
Keyword(s):  
Large Amplitude ◽  
Electromagnetic Waves ◽  
Magnetized Plasma ◽  
Circularly Polarized

scholarly journals Beat wave cyclotron heating of rippled density plasma

2018 ◽  
Vol 36 (4) ◽  
pp. 465-469 ◽  
Author(s):  
Pushplata ◽  
A. Vijay
Keyword(s):  
Magnetic Field ◽  
Large Amplitude ◽  
Ponderomotive Force ◽  
Beat Frequency ◽  
Magnetized Plasma ◽  
Larmor Radius ◽  
Finite Larmor Radius ◽  
Wave Heating ◽  
The Magnetic Field ◽  
Density Plasma

AbstractLaser beat wave heating of magnetized plasma via electron cyclotron damping is proposed and analyzed. A plasma density ripple is presumed to exist across the magnetic field. Two collinear lasers propagating along the magnetic field exert a beat frequency ponderomotive force on electrons, driving a large amplitude Bernstein quasi-mode which suffers cyclotron damping on electrons. Finite Larmor radius effects play an important role in the heating. Electron temperature initially rises linearly with time. As the temperature rises cyclotron damping becomes stronger and temperature rises rapidly. The process, however, requires ripple wavelength shorter than the wavelength of the beat wave.

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