Browsing ASSTG Articles by Title
Now showing items 1-20 of 51
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Anomalous Diffusion in One-Dimensional Disordered Systems: A Discrete Fractional Laplacian Method (Part I)
(IOP Publishing, 2020-04-03)This work extends the applications of Anderson-type Hamiltonians to include transport characterized by anomalous dffusion. Herein, we investigate the transport properties of a one dimensional disordered system that employs ... -
Charged Grains In Saturn's F-Ring: Interaction With Saturn's Magnetic Field
(Advances in Space Research, 2004)Saturn’s dynamic F-Ring still presents a challenge for understanding and explaining the kinematic processes that lead to the changing structure visible in our observations of this ring. This study examines the effect of ... -
Charging and coagulation of dust in protoplanetary environments
(Astrophysical Journal, 2012-01-01)Combining a particle–particle, particle–cluster, and cluster–cluster agglomerationmodel with an aggregate charging model, the coagulation and charging of dust particles in plasma environments relevant for protoplanetary ... -
Charging and Growth of Fractal Dust Grains
(IEEE Transactions on Plasma Science, 2008-02)The structure and evolution of aggregate grains formed within a plasma environment are dependent on the charge acquired by the micron-sized dust grains during the coagulation process. The manner in which the charge is ... -
Charging of aggregate grains in astrophysical environments
(Astrophysical Journal, 2013-02-01)The charging of dust grains in astrophysical environments has been investigated with the assumption that these grains are homogeneous spheres. However, there is evidence which suggests that many grains in astrophysical ... -
Coagulation in the Vicinity of a Gap-Opening Jupiter-Mass Planet
(Astrophysical Journal, 2016-06)We analyze the coagulation of dust in and around a gap opened by a Jupiter-mass planet. To this end, we carry out a high-resolution magnetohydrodynamic (MHD) simulation of the gap environment, which is turbulent due to the ... -
Cosmic Dust Aggregation with Stochastic Charging
(Astrophysical Journal, 2013-10-04)The coagulation of cosmic dust grains is a fundamental process which takes place in astrophysical environments, such as presolar nebulae and circumstellar and protoplanetary disks. Cosmic dust grains can become charged ... -
Delocalization in infinite disordered two-dimensional lattices of different geometry
(Physical Review B, 2017-12-06)The spectral approach to infinite disordered crystals is applied to anAnderson-type Hamiltonian to demonstrate the existence of extended states for nonzero disorder in 2D lattices of different geometries. The numerical ... -
Detailed model of the growth of fluffy dust aggregates in a protoplanetary disk: Effects of nebular conditions
(AAS Publishing, 2020-07)Coagulation of dust aggregates plays an important role in the formation of planets and is of key importance to the evolution of protoplanetary disks (PPDs). Characteristics of dust, such as the diversity of particle size, ... -
Determination of the levitation limits of dust particles within the sheath in complex plasma experiments
(Physics of Plasmas, 2012-01-23)Experiments are performed in which dust particles are levitated at varying heights above the powered electrode in a radio frequency plasma discharge by changing the discharge power. The trajectories of particles dropped ... -
Dipole-dipole interactions of charged magnetic grains
(IEEE, 2010-04)The interaction between dust grains is an important process in fields as diverse as planetesimal formation or the plasma processing of silicon wafers into computer chips. This interaction depends in large part on the ... -
Discrete stochastic charging of aggregate grains
(Physical Review E, 2018-05)Dust particles immersed in a plasma environment become charged through the collection of electrons and ions at random times, causing the dust charge to fluctuate about an equilibrium value. Small grains (with radii less ... -
Dust as probes: Determining confinement and interaction forces
(IOP Publishing, 2020-10)The PK-4 system is a micro-gravity dusty plasma experiment currently in operation on-board the International Space Station. The experiment utilizes a long DC discharge in neon or argon gases. We apply our 2D particle-in-cell ... -
Dust charging in dynamic ion wakes
(AIP Publishing, 2020-02-14)A molecular dynamics simulation of ion flow past dust grains is used to investigate the interaction between a pair of charged dust particles and streaming ions. The charging and dynamics of the grains are coupled and derived ... -
Dynamics of a Dust Crystal with Two Different Size Dust Species
(Advances in Space Research, 2006)A self-consistent 3D model for a complex (dusty) plasma is used to study the effects of multiple-sized dust grains in a dust crystal. In addition to the interparticle forces, which interact through a Yukawa potential, the ... -
Effect of Dipole-Dipole Charge Interactions on Dust Coagulation
(New Journal of Physics, 2009-06-16)This study examines the effect that dipole–dipole charge interactions between fractal aggregates have on the growth of dust grains. Aggregates in a plasma or radiative environment will have charge distributed over their ... -
The effect of dust charge variation, due to ion flow and electron depletion, on dust levitation
(AIP Conference Proceedings, 2011)Using a fluid model, the plasma densities, electron temperature and ion Mach number in front of a powered electrode in different plasma discharges is computed. The dust charge is computed using OML theory for Maxwellian ... -
The effect of electrode heating on the discharge parameters in complex plasma experiments
(IOP Publishing, 2011-01-25)Thermophoresis is a tool often applied in complex plasma experiments. One of the usual stated benefits over other experimental tools is that electrode temperature changes required to induce thermophoresis do not directly ... -
Effect of Multi-Sized Dust Distribution on Local Plasma Sheath Potentials
(Advances in Space Research, 2006)This work investigates the modification of a plasma sheath in a complex plasma due to the presence of dust particles with a specified size distribution. A self-consistent model for the plasma sheath is combined with a ... -
Effect of the Charge-Dipole Interaction on the Coagulation of Fractal Aggregates
(IEEE Transactions on Plasma Science, 2004)A numerical model with broad applications to complex (dusty) plasmas is presented. The self-consistent N-body code allows simulation of the coagulation of fractal aggregates, including the charge-dipole interaction of the ...