The Bohm criterion for the dusty plasma sheath

Liu, Jinyuan; Wang, Jialei; Wang, Xiaogang; Zhang, Qiang; Xiu, Zou

doi:10.1063/1.1600734

Cited by 40 publications

(19 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Taking the average viscosity value ofη ≈ 0.15 (η ≈ paring it to the ratio ν/η = 1.64 × 10 13 kg −1 , as obtained when applying Method 1, we estimate the effective dust-background collision frequency to be ν ≈ 3.7 s −1 . This value is slightly higher than the approximated dust-neutral collision frequency defined as ν dn = δ(4π/3)r 2 d n n v n m n /m d ≈ 3.1 s −1 , where r d and m d are the dust radius and mass; n n , v n and m n are the neutral number density, average speed and mass, respectively, δ = 1.26 [30].…”

Section: B Experiments With Static Shearmentioning

confidence: 77%

Static and dynamic shear viscosity of a single-layer complex plasma

et al. 2011

View full text Add to dashboard Cite

The static and dynamic (complex) shear viscosity of a single-layer dusty plasma is measured by applying, respectively, a stationary and a periodically modulated shear stress, induced by the light pressure of manipulating laser beams. Under static conditions we observe a decrease of the viscosity with increasing shear rate, the so-called shear-thinning behavior. Under oscillating shear both the magnitude and the ratio of the dissipative and elastic contributions to the complex viscosity show strong frequency dependence, as the system changes from viscous to elastic in nature with increasing excitation frequency. Accompanying molecular dynamics simulations explain and support the experimental observations.

show abstract

Section: B Experiments With Static Shearmentioning

confidence: 77%

Static and dynamic shear viscosity of a single-layer complex plasma

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The MF particles have a diameter of 9.19 ± 0.09 µm and mass density of 1.51 g/cm 3 , while the PS particles have a diameter of 11.36 ± 0.12 µm and mass density of 1.05 g/cm 3 . Gas pressure was maintained at about 0.65 Pa; the corresponding neutral gas damping rate was γ 0.77 s −1 for MF particles and γ 0.91 s −1 for PS particles [22]. Further experimental parameters are listed in Table 1.…”

mentioning

confidence: 99%

Interaction of two-dimensional plasma crystals with upstream charged particles

Du¹,

Nosenko²,

Zhdanov³

et al. 2012

EPL

View full text Add to dashboard Cite

Two-dimensional plasma crystals are characterized by a strong up-and-down asymmetry not only due to gravity but also due to the presence of plasma flow at the location of particles. We study for the first time the interaction of a single-layer plasma crystal with charged extra particles located above it (upstream of the flow of ions). Upstream extra particles tend to move between the rows of particles in the crystal, accelerate to supersonic speeds, and excite attraction-dominated Mach cones and wakes in the crystal.

show abstract

“…The Bohm criterion in a dusty plasma has been theoretically studied by many authors (Yu, Saleem & Luo 1992; Ma & Yu 1995; Liu et al. 2003; Yaroshenko et al. 2009; Chung 2014; Fouial, Tahraoui & Annou 2016) under a variety of scenarios; however, an experimental cross-verification of various theoretical results remains to be carried out.…”

Section: Bohm Criterion For a Dusty Plasma Sheathmentioning

confidence: 99%

Langmuir probe in collisionless and collisional plasma including dusty plasma

et al. 2017

View full text Add to dashboard Cite

Measurements of local plasma parameters in dusty plasma are crucial for understanding the physics issues related to such systems. The Langmuir probe, a small electrode immersed in the plasma, provides such measurements. However, designing of a Langmuir probe system in a dusty plasma environment demands special consideration. First, the probe has to be miniaturized enough so that its perturbation on the ambient dust structure is minimal. At the same time, the probe dimensions must be such that a well-defined theory exists for interpretation of its characteristics. The associated instrumentation must also support the measurement of current collected by the probe with high signal to noise ratio. The most important consideration, of course, comes from the fact that the probes are prone to dust contamination, as the dust particles tend to stick to the probe surface and alter the current collecting area in unpredictable ways. This article describes the design and operation of a Langmuir probe system that resolves these challenging issues in dusty plasma. In doing so, first, different theories that are used to interpret the probe characteristics in collisionless as well as in collisional regimes are discussed, with special emphasis on application. The critical issues associated with the current–voltage characteristics of Langmuir probe obtained in different operating regimes are discussed. Then, an algorithm for processing these characteristics efficiently in presence of ion-neutral collisions in the probe sheath is presented.

show abstract

The Bohm criterion for the dusty plasma sheath

Cited by 40 publications

References 35 publications

Static and dynamic shear viscosity of a single-layer complex plasma

Static and dynamic shear viscosity of a single-layer complex plasma

Interaction of two-dimensional plasma crystals with upstream charged particles

Langmuir probe in collisionless and collisional plasma including dusty plasma

Contact Info

Product

Resources

About