Now showing items 23-36 of 36

    • 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 ...
    • Measurement of net electric charge and dipole moment of dust aggregates in a complex plasma 

      Yousefi, Raziyeh; Davis, Allen; Carmona-Reyes, Jorge; Matthews, Lorin; Hyde, Truell (Physical Review E, 2014-09-02)
      Understanding the agglomeration of dust particles in complex plasmas requires knowledge of basic properties such as the net electrostatic charge and dipole moment of the dust. In this study, dust aggregates are formed from ...
    • Mode Couplings and Conversions for Horizontal Dust Particle Pairs in Complex Plasmas 

      Qiao, Ke; Kong, Jie; Zhang, Zhuanhao; Matthews, Lorin; Hyde, Truell (IEEE Transactions on Plasma Science, 2013-04)
      The normal modes for horizontal dust particle pairs in a complex plasma are investigated using two methods, a numerical calculation and a molecular dynamics simulation. The ion wakefield downstream of each particle and the ...
    • Mode couplings and resonance instabilities in dust clusters 

      Qiao, Ke; Van Oeveren, E.; Matthews, L.S.; Hyde, T.W. (Physical Review E, 2013-10-16)
      The normal modes for three to seven particle two-dimensional (2D) dust clusters in a complex plasma are investigated using an N-body simulation. The ion wakefield downstream of each particle is shown to induce coupling ...
    • A model of coagulation in dust clouds during grain charging 

      Barge, Laura; Matthews, Lorin; Hyde, Truell (Advances in Space Research, 2004)
      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 ...
    • Modeling Agglomeration of Dust Particles in Plasma 

      Matthews, Lorin; Land, Victor; Ma, Qianyu; Perry, Jonathan; Hyde, Truell (AIP Conference Proceedings, 2011)
      The charge on an aggregate immersed in a plasma environment distributes itself over the aggregate’s surface; this can be approximated theoretically by assuming a multipole distribution. The dipole-dipole (or higher order) ...
    • Modelling of Voids in Complex Radio Frequency Plasmas 

      Goedheer, Willem Jan; Land, Victor; Venema, Jan (WILEY-VCH, 2009-06-02)
      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 ...
    • Multipole Expansions of Aggregate Charge: How Far to Go? 

      Matthews, Lorin; Coleman, Douglas A.; Hyde, Truell W. (IEEE Transactions on Plasma Science, 2016-04)
      Aggregates immersed in a plasma or radiative environment will have charge distributed over their extended surface. Previous studies have modeled the aggregate charge using the monopole and dipole terms of a multipole ...
    • Photophoresis on polydisperse basalt microparticles under microgravity 

      Kupper, M.; de Beule, C.; Wurm, G.; Matthews, L.; Kimery, J.; Hyde, T.W. (Journal of Aerosol Science, 2014-10)
      Photophoresis is a force which can dominate the motion of illuminated aerosols in low pressure environments of laboratory experiments, planetary atmospheres or protoplanetary disks. In drop tower experiments we quantified ...
    • Photophoretic Force on Aggregate Grains, Monthly Notices of the Royal Astronomical Society 

      Matthews, Lorin; Kimery, J. B.; Wurm, G.; de Beule, C.; Kuepper, M; Hyde, T. W. (Monthly Notices of the Royal Astronomical Society, 2016-01-21)
      The photophoretic force may impact planetary formation by selectively moving solid particles based on their composition and structure. This generates collision velocities between grains of different sizes and sorts the ...
    • Probing the sheath electric field using thermophoresis in dusty plasma 

      Land, Victor; Smith, Bernie; Matthews, Lorin; Hyde, Truell (IEEE Transactions on Plasma Science, 2010-04)
      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 ...
    • Simulation of dust voids in complex plasmas 

      Goedheer, Jan Willem; Land, Victor (IOP Publishing, 2008-11-04)
      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 ...
    • Vibrational Modes and Instabilities of a Dust Particle Pair in a Complex Plasma 

      Qiao, Ke; Matthews, Lorin; Hyde, Truell (IEEE Transactions on Plasma Science, 2010-04-10)
      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 ...