Now showing items 4-23 of 33

  • Charging of aggregate grains in astrophysical environments 

    Ma, Qianyu; Matthews, Lorin; Land, Victor; Hyde, Truell (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 ...
  • Cosmic Dust Aggregation with Stochastic Charging 

    Matthews, L.S.; Shotorban, B.; Hyde, T.W. (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 ...
  • Determination of the levitation limits of dust particles within the sheath in complex plasma experiments 

    Douglass, Angela; Land, Victor; Qiao, Ke; Matthews, Lorin; Hyde, Truell (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 

    Perry, Jonathan; Matthews, Lorin; Hyde, Truell (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 ...
  • Dynamics of a Dust Crystal with Two Different Size Dust Species 

    Matthews, Lorin; Qiao, Ke; Hyde, Truell (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 

    Matthews, Lorin; Hyde, Truell (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 

    Land, Victor; Douglass, Angela; Qiao, Ke; Matthews, Lorin; Hyd, Truell (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 

    Land, Victor; Carmona Reyes, Jorge; Creel, James; Schmoke, Jimmy; Cook, Mike; Matthews, Lorin; Hyde, Truell (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 

    Sun, Meihong; Matthews, Lorin; Hyde, Truell (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 

    Matthews, Lorin; Hyde, Truell (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 ...
  • Effects of monomer shape on the formation of aggregates from a power law monomer distribution 

    Perry, Jonathan; Kimery, Jesse; Matthews, Lorin; Hyde, Truell (New Journal of Physcis, 2013)
    The coagulation of dust aggregates is an important process in many physical systems such as the Earth’s upper atmosphere, comet tails and protoplanetary discs. Numerical models which study the aggregation in these systems ...
  • 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, 2009-06-12)
    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 ...
  • Finite coulomb crystal formation 

    Vasut, John; Hyde, Truell; Barge, Laura (Advances in Space Research, 2004)
    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 ...
  • Fluid modeling of void closure in microgravity noble gas complex plasmas 

    Land, Victor; Matthews, Lorin; Hyde, Truell; Bolser, Diana (Physics Review E, 2010-05-12)
    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 ...
  • Formation of Cosmic Dust Bunnies 

    Matthews, Lorin; Hayes, Ryan; Freed, Michael; Hyde, Truell (IEEE Transactions on Plasma Science, 2007)
    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 ...
  • Gravitoelectrodynamics of Charged Grains in Saturn's F Ring: Encounters with Prometheus and Pandora 

    Matthews, Lorin; Hyde, Truell (Journal of Physics A, 2003-09-12)
    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 ...
  • How to make large, void-free dust clusters in dusty 

    Land, Victor; Goedheer, Willem Jan (IOP publishing, 2008-12-18)
    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 ...
  • Hydrodynamic and kinetic modelling of complex radio-frequency plasmas 

    Goedheer, Willem Jan; Land, Victor; Venema, Jan (IOP publishing, 2009-09-18)
    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 ...
  • The influence of monomer shape on aggregate morphologies 

    Perry, Jonathan; Gostomski, Erwin; Matthews, Lorin; Hyde, Truell (Astronomy & Astrophysics, 2012-03)
    Context. The coagulation of dust particles is the initial step in planetary formation, with the precursors to planetesimals believed to form via the collisions of micron and submicron sized dust particles in the disk ...
  • Interaction force in a vertical dust chain inside a glass box 

    Kong, J.; Qiao, K.; Matthews, L.S.; Hyde, T.W. (Physical Review E, 2014-07-31)
    Small number dust particle clusters can be used as probes for plasma diagnostics. The number of dust particles as well as cluster size and shape can be easily controlled employing a glass box placed within a Gaseous ...