Browsing CASPER by Title
Now showing items 1-20 of 90
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Agglomeration of Dust Particles in the Lab
(AIP Conference Proceedings, 2011)Dust aggregates are formed in a laboratory plasma as monodisperse spheres are accelerated in a self-excited dust density wave. The asymmetric charge on the aggregates causes them to rotate as they interact with the sheath ... -
Analysis of Magnetic Field Plasma Interactions Using Micro Particles as Probes
(American Physics Society/ Physical Review E, 2015-08-26)The interaction between a magnetic field and plasma close to a nonconductive surface is of interest for both science and technology. In space, crustal magnetic fields on celestial bodies without atmosphere can interact ... -
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 ... -
Branes in the M_D x M_d+ x M_d- Compactification of Type II String on S^1/Z_2 and Their Cosmologicval Applications
(2010-07-09)In this paper, we study the implementation of brane worlds in type II string theory. Starting with the NS/NS sector of type II string, we first compactify the (D + d+ + d−)-dimensional spacetime, and reduce the corresponding ... -
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 ... -
Comparison of Plasma Magnetic Field Interactions in a Static and Dynamic Plasma Facility
(Transactions of the Japan Society for Aeronautical and Space Sciences, Aerospace Technology Japan, 2016)Magnetic fields are a principal/widespread/promising tool/instrument in space technology design for the use in advanced propulsion concepts, shielding from radiation or to aid thermal protection during the atmospheric ... -
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 ... -
Crystallization Dynamics of a Single Layer Complex Plasma
(Physical Review Letters, 2010-09)We report a series of complex (dusty) plasma experiments, aimed at the study of the detailed time evolution of the recrystallization process following a rapid quench of a two-dimensional dust liquid. The experiments were ... -
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 ... -
Digital Imaging and Analysis of Dusty Plasmas
(Advances in Space Research, 2004)Dust particles immersed within a plasma environment, such as those found in planetary rings or cometary environments, will acquire an electric charge. If the ratio of interparticle potential energy to average kinetic energy ... -
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 probe for horizontal field distribution in low pressure gas discharges
(Plasma Sources Science and Technology, 2014-06-23)Using dust grains as probes in gas discharge plasma is a very promising, but at the same time very challenging method, as the individual external control of dust grains has to be solved. We propose and demonstrate the ... -
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 ...