Dissipative Dark Soliton in a Complex Plasma

Abstract

The observation of a dark soliton in a three-dimensional complex plasma containing monodisperse microparticles is presented. We perform our experiments using neon gas in the bulk plasma of an rf discharge. A gas temperature gradient of 500K/m is applied to balance gravity and to levitate the particles in the bulk plasma. The wave is excited by a short voltage pulse on the electrodes of the radio frequency discharge chamber. It is found that the wave propagates with constant speed. The propagation time of the dark soliton is approximately 20 times longer than the damping time.

Cylindrical and spherical dust-acoustic shock waves in a strongly coupled dusty plasma

“…Nowadays, there is a great deal of interest in nonlinear DA waves because of their vital role in understanding the properties of the localized electrostatic perturbations in space and laboratory dusty plasmas [14]- [20]. The nonlinear DA waves have been investigated theoretically [1], [21]- [27], as well as experimentally [28]- [35] over the last few years. However, most of these theoretical works [1], [21]- [27] are limited to a weakly coupled dusty plasma, where the coupling parameter (= 0 exp(−κ), in which 0 = z 2 average inter-grain distance, T d is the dust temperature in units of the Boltzmann constant, λ D is the dusty plasma Debye radius, and n d0 is the equilibrium dust number density) is much less than one ( 1).…”

Dust Solitons in Reactive Plasma of a Spherical Glow Discharge

“…This concurrence leads to the formation of some effective electric field inside the moving narrow dust cloud that confines dust particles, prevents them from dispersing, and decreases the damping of the cloud velocity. It should be mentioned that there have been several experimental studies on the propagation of nonlinear dust acoustic solitary waves [16,17], which showed an unexpectedly low damping rate of soliton velocity.…”

Controlled Generation of Bright or Dark Solitons in a Fiber Laser by Intracavity Nonlinear Absorber

“…[41][42][43][44][45]. So far, the dissipative bright solitons have been extensively investigated and dissipative dark soliton in plasma was also discussed in [46], while the formation of dissipative dark solitons in fiber lasers has not been addressed. In this paper, based on the operation of an all-normal dispersion fiber laser that has a typical NPR mode locking cavity configuration, we numerically show that depending on the setting of the linear cavity phase delay bias (LCPDB), the same laser could operate in different modes: either in CW emission, or dark soliton emission, or bright soliton emission.…”