Nonlinear stage of development of high-frequency instability of electromagnetic waves in flux-magnetoactive plasma system

1988 ◽  
Vol 31 (9) ◽  
pp. 732-737
Author(s):  
V. V. Tamoikin ◽  
S. M. Fainshtein
Keyword(s):  
High Frequency ◽  
Electromagnetic Waves ◽  
Magnetoactive Plasma ◽  
Frequency Instability ◽  
Plasma System ◽  
Stage Of Development ◽  
Nonlinear Stage

Self-focusing of intense high frequency electromagnetic waves in a collisional magnetoactive plasma

2011 ◽  
Vol 18 (11) ◽  
pp. 112305 ◽  
Author(s):  
A. R. Niknam ◽  
A. Aliakbari ◽  
S. Majedi ◽  
F. Haji Mirzaei ◽  
M. Hashemzadeh
Keyword(s):  
High Frequency ◽  
Electromagnetic Waves ◽  
Magnetoactive Plasma ◽  
Self Focusing

Experimental Studies of the Localized Disturbances and their Secondary High-Frequency Instability in the Flat Plate, Unswept and Swept Wing Boundary Layer (Review)

2014 ◽  
Vol 9 (4) ◽  
pp. 39-64
Author(s):  
Viktor Kozlov ◽  
Genrich Grek ◽  
Yuriy Litvinenko ◽  
Stepan Tolkachev ◽  
Valeriy Chernoray
Keyword(s):  
Boundary Layer ◽  
Flat Plate ◽  
High Frequency ◽  
Flow Instability ◽  
Experimental Studies ◽  
Frequency Instability ◽  
Swept Wing ◽  
Streaky Structure ◽  
Streaky Structures ◽  
Nonlinear Stage

Results of experimental studies of the streaky structures instability at nonlinear stage of this process in the shear flows are shown in this work. Flow patterns of the streaky structures with secondary high-frequency disturbances generated on them during its spatial evolution are discussed. Different scenarios of the coherent vortical structures occurrence and downstream evolution in the flat plate, unswept and swept wing boundary layer are considered. Features of the sinusoidal and varicose instability of the longitudinal stationary streaky structure at nonlinear stage of its downstream development are shown. To these features concern: modulation of streaky structure in transverse and streamwise direction by frequency of secondary disturbances, occurrence of new streaky structures downstream and occurrence and development of the nonstationary localized vortices such as Λ-structures in both cases. Development of a nonlinear stage of flow instability is considered both in the region of the adverse and zero pressure gradient

Scattering of electromagnetic waves by hybrid waves in a two-electron-temperature plasma

1991 ◽  
Vol 46 (1) ◽  
pp. 99-106 ◽  
Author(s):  
S. K. Sharma ◽  
A. Sudarshan
Keyword(s):  
Growth Rate ◽  
Electron Temperature ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Low Frequency ◽  
Lower Hybrid ◽  
Stimulated Scattering ◽  
Coupled Modes ◽  
Temperature Plasma ◽  
Electrostatic Perturbation

In this paper, we use the hydrodynamic approach to study the stimulated scattering of high-frequency electromagnetic waves by a low-frequency electrostatic perturbation that is either an upper- or lower-hybrid wave in a two-electron-temperature plasma. Considering the four-wave interaction between a strong high-frequency pump and the low-frequency electrostatic perturbation (LHW or UHW), we obtain the dispersion relation for the scattered wave, which is then solved to obtain an explicit expression for the growth rate of the coupled modes. For a typical Q-machine plasma, results show that in both cases the growth rate increases with noh/noc. This is in contrast with the results of Guha & Asthana (1989), who predicted that, for scattering by a UHW perturbation, the growth rate should decrease with increasing noh/noc.

Multiple scattering of ultra-high frequency electromagnetic waves by two plasma cylinders

2012 ◽  
Vol 111 (7) ◽  
pp. 073303 ◽  
Author(s):  
Wu Xiao-po ◽  
Shi Jia-ming ◽  
Wang Jia-chun ◽  
Yuan Zhong-cai ◽  
Xu Bo ◽  
...  
Keyword(s):  
Multiple Scattering ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Ultra High Frequency
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