Existence and stability of modulated dust-acoustic wave packets in the presence of nonthermal ions

2015 ◽  
Vol 93 (3) ◽  
pp. 271-277
Author(s):  
H. Alinejad ◽  
M. Mahdavi
Keyword(s):  
Modulational Instability ◽  
Wave Packets ◽  
Dusty Plasmas ◽  
Dust Acoustic Wave ◽  
Envelope Solitons ◽  
Fast Ions ◽  
Dust Temperature ◽  
Dust Acoustic ◽  
Existence And Stability ◽  
Instability Growth

The effects of dust temperature and energetic (nonthermal) ions are incorporated in the study of modulated instability of dust-acoustic (DA) waves in a dusty plasma containing warm adiabatic dust grains, isothermal electrons and hot ions obeying a nonthermal distribution. Based on the multiple space and time scales perturbation, a nonlinear Schrödinger equation is derived with a solution showing a new relationship between the modulated DA wave packets and ion nonthermality. It is shown that as the population of fast ions increases, the transition from stable dark envelope solitons to unstable ones shifts to the smaller wavelength regions. The instability growth rate reduces owing to the presence of nonthermal ions. It is also found that the effects of dust temperature and electron concentration modify the criteria for the modulational instability of DA waves. The results could be useful for understanding the properties of modulated wave packets and their evolution in space and laboratory dusty plasmas, such as those in and around the Earth’s foreshock.

Dust acoustic wave in a dusty plasmas with streaming ions and nonadiabatic dust charge variation

2009 ◽  
Vol 373 (33) ◽  
pp. 2944-2947 ◽  
Author(s):  
Yunliang Wang ◽  
Zhongxiang Zhou ◽  
Xiangqian Jiang ◽  
Xiaodong Ni ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Dusty Plasmas ◽  
Dust Acoustic Wave ◽  
Charge Variation ◽  
Dust Charge ◽  
Dust Acoustic

Experimental quiescent drifting dusty plasmas and temporal dust acoustic wave growth

2011 ◽  
Vol 18 (11) ◽  
pp. 113706 ◽  
Author(s):  
J. R. Heinrich ◽  
S.-H. Kim ◽  
J. K. Meyer ◽  
R. L. Merlino
Keyword(s):  
Acoustic Wave ◽  
Dusty Plasmas ◽  
Wave Growth ◽  
Dust Acoustic Wave ◽  
Dust Acoustic

A note on ion–dust streaming instability in a collisional dusty plasma

2002 ◽  
Vol 67 (4) ◽  
pp. 235-242 ◽  
Author(s):  
M. ROSENBERG
Keyword(s):  
Dusty Plasma ◽  
Collision Frequency ◽  
Low Frequency ◽  
Dusty Plasmas ◽  
Dust Acoustic Wave ◽  
Ion Drift ◽  
Acoustic Instability ◽  
Streaming Instability ◽  
Dust Acoustic ◽  
Thermal Speed

This note investigates an ion-dust streaming instability with frequency ω less than the dust collision frequency νd, in an unmagnetized collisional dusty plasma. Under certain conditions, a resistive instability can be excited by an ion drift on the order of the ion thermal speed, even when the dust acoustic wave is heavily damped. The effect of weak collisions on the usual dust acoustic instability in the regime ω > νd is also considered. Applications to experimental observations of low-frequency fluctuations in laboratory d.c. glow discharge dusty plasmas are discussed.

25 years of dust acoustic waves

2014 ◽  
Vol 80 (6) ◽  
pp. 773-786 ◽  
Author(s):  
Robert L. Merlino
Keyword(s):  
Acoustic Wave ◽  
Acoustic Waves ◽  
High Speed ◽  
Large Body ◽  
Dusty Plasmas ◽  
Dust Particles ◽  
Collective Effects ◽  
Nonlinear Properties ◽  
Dust Acoustic Wave ◽  
Dust Acoustic

The dust acoustic wave (DAW) was first discussed by P. K. Shukla in May of 1989 at the First Capri Workshop on Dusty Plasmas. In the past 25 years, the subsequent publication of the linear and nonlinear properties of the DAW (Rao, N. N., Shukla, P. K. and Yu, M. Y. 1990 Planet. Space Sci.38, 543) has generated and sustained a large body of theoretical and experimental research that has clarified the physics of collective effects in dusty plasmas. A unique feature of the DAW is that it can be observed (literally) using laser illumination and high-speed videography, revealing details of wave-particle interactions at an unprecedented single particle level. This paper attempts to review some of the contributions and extensions of dust acoustic wave physics, as well as identify recent findings that illustrate the potential importance of this dust wave in the agglomeration of dust particles.

Large-amplitude dust-acoustic solitary waves in an electron-depleted hot dusty plasma with trapped ions

2008 ◽  
Vol 86 (8) ◽  
pp. 975-983 ◽  
Author(s):  
M Tribeche ◽  
S Younsi ◽  
T H Zerguini
Keyword(s):  
Dusty Plasma ◽  
Large Amplitude ◽  
Dusty Plasmas ◽  
Trapped Ions ◽  
Ion Trapping ◽  
Dust Particles ◽  
Dust Temperature ◽  
Dust Acoustic ◽  
Nonlinear Potential ◽  
52.35 Tc

A theoretical model is presented to show the existence, formation, and possible realization of large-amplitude dust-acoustic solitary potentials in electron-depleted hot dusty plasma with trapped ions. These nonlinear localized structures are self-consistent solutions of the Vlasov equation in which the ion response is non-Maxwellian due to the ion trapping in the large-amplitude plasma potentials. Emphasis is given to the role of the grain temperature. Interestingly, one finds that the effect of increasing the dust temperature is to restrict the domain of allowable Mach numbers. The latter enlarges when the relative amount of trapped ions is increased. Furthermore, the nonlinear potential shrinks and exhibits smaller depth and smaller width than the one involving cold dust grains. The strong localization of the dust particles becomes less pronounced when the dust temperature is increased. The results complement and provide new insights into previously published results on this problem and their relevance to space dusty plasmas is pointed out.PACS Nos.: 52.27.Lw; 52.35.Fp; 52.35.Sb; 52.35.Tc; 52.35.Mw

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