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Browsing ASSTG Articles by Issue Date

Browsing ASSTG Articles by Issue Date

Now showing items 1-20 of 27

Gravitoelectrodynamics of Charged Grains in Saturn's F Ring: Encounters with Prometheus and Pandora

Matthews, Lorin; Hyde, Truell (Journal of Physics A, )

The dynamics of Saturn's F ring have been a matter of curiosity ever since Voyagers 1 and 2 sent back pictures of the ring's unusual features. Some of these images showed three distinct ringlets with the outer two displaying ...
A model of coagulation in dust clouds during grain charging

Barge, Laura; Matthews, Lorin; Hyde, Truell (Advances in Space Research, )

Initially uncharged grains in space and laboratory plasma environments become charged due to currents driven by potential differences in the dusty plasma. Certain macroscopic effects such as coagulation of smaller grains ...
Effect of the Charge-Dipole Interaction on the Coagulation of Fractal Aggregates

Matthews, Lorin; Hyde, Truell (IEEE Transactions on Plasma Science, )

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 ...
Finite coulomb crystal formation

Vasut, John; Hyde, Truell; Barge, Laura (Advances in Space Research, )

Dust particles immersed within a plasma environment, such as those found in planetary rings or comets, will acquire an electric charge. If the ratio of the inter-particle potential energy to average kinetic energy is large ...
Charged Grains In Saturn's F-Ring: Interaction With Saturn's Magnetic Field

Matthews, Lorin; Hyde, Truell (Advances in Space Research, )

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 ...
Effect of Multi-Sized Dust Distribution on Local Plasma Sheath Potentials

Sun, Meihong; Matthews, Lorin; Hyde, Truell (Advances in Space Research, )

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 ...
Dynamics of a Dust Crystal with Two Different Size Dust Species

Matthews, Lorin; Qiao, Ke; Hyde, Truell (Advances in Space Research, )

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 ...
Formation of Cosmic Dust Bunnies

Matthews, Lorin; Hayes, Ryan; Freed, Michael; Hyde, Truell (IEEE Transactions on Plasma Science, )

Planetary formation is an efficient process now thought to take place on a relatively short astronomical time scale. Recent observations have shown that the dust surrounding a protostar emits more efficiently at longer ...
Charging and Growth of Fractal Dust Grains

Matthews, Lorin; Hyde, Truell (IEEE Transactions on Plasma Science, )

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 ...
Simulation of dust voids in complex plasmas

Goedheer, Jan Willem; Land, Victor (IOP Publishing, )

In dusty radio-frequency (RF) discharges under micro-gravity conditions often a void is observed, a dust free region in the discharge center. This void is generated by the drag of the positive ions pulled out of the ...
How to make large, void-free dust clusters in dusty

Land, Victor; Goedheer, Willem Jan (IOP publishing, )

Collections of micrometer-sized solid particles immersed in plasma are used to mimic many systems from solid state and fluid physics, due to their strong electrostatic interaction, their large inertia, and the fact that ...
Modelling of Voids in Complex Radio Frequency Plasmas

Goedheer, Willem Jan; Land, Victor; Venema, Jan (WILEY-VCH, )

In this paper hydrodynamic and kinetic approaches to model low pressure capacitively coupled complex radiofrequency discharges are discussed and applied to discharges under microgravity. Experiments in the PKENefedov reactor ...
Experimental and computational characterization of a modified GEC cell for dusty plasma experiments

Land, Victor; Shen, Erica; Smith, Bernard; Matthews, Lorin; Hyde, Truell (New Journal of Physics, )

A self-consistent fluid model developed for simulations of microgravity dusty plasma experiments has for the first time been used to model asymmetric dusty plasma experiments in a modified Gaseous Electronics Conference ...
Effect of Dipole-Dipole Charge Interactions on Dust Coagulation

Matthews, Lorin; Hyde, Truell (New Journal of Physics, )

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 ...
Hydrodynamic and kinetic modelling of complex radio-frequency plasmas

Goedheer, Willem Jan; Land, Victor; Venema, Jan (IOP publishing, )

In this paper hydrodynamic and kinetic approaches to model low-pressure capacitively coupled complex radio-frequency discharges are discussed and applied to discharges under micro-gravity. Complex plasmas contain dust ...
Probing the sheath electric field using thermophoresis in dusty plasma

Land, Victor; Smith, Bernie; Matthews, Lorin; Hyde, Truell (IEEE Transactions on Plasma Science, )

A self-consistent dusty plasma fluid model has been extended to incorporate all the oble gases as the carrier gas. An analysis of void closure in complex plasma composed of these gases over a wide range of experimental ...
Dipole-dipole interactions of charged magnetic grains

Perry, Jonathan; Matthews, Lorin; Hyde, Truell (IEEE, )

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 ...
Vibrational Modes and Instabilities of a Dust Particle Pair in a Complex Plasma

Qiao, Ke; Matthews, Lorin; Hyde, Truell (IEEE Transactions on Plasma Science, )

Vibrational modes and instabilities of a dust-particle pair in a terrestrial aboratory complex plasma are investigated by employing an analytical method whereby the plasma wakefield induced by an external electric field ...
Fluid modeling of void closure in microgravity noble gas complex plasmas

Land, Victor; Matthews, Lorin; Hyde, Truell; Bolser, Diana (Physics Review E, )

A self-consistent dusty plasma fluid model has been extended to incorporate all the noble gases as the carrier gas. An analysis of void closure in complex plasma composed of these gases over a wide range of experimental ...
The effect of dust charge variation, due to ion flow and electron depletion, on dust levitation

Land, Victor; Douglass, Angela; Qiao, Ke; Matthews, Lorin; Hyd, Truell (AIP Conference Proceedings, )

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 ...