Dissertation/Thesis Abstract

Fine-Particle Charging-Rate-Limit Modification to Grain Dynamics in Abrupt and Gradual Inhomogeneities
by Walker, Jeffrey J., Ph.D., West Virginia University, 2015, 608; 3702051
Abstract (Summary)

Gyro-phase drift is a guiding center drift that is directly dependent on the charging rate limit of dust grains. The effect of introducing a gyro-phase-dependence on the grain charge leads to two orthogonal components of guiding-center drift. One component, referred to here as grad-q drift results from the time-varying, gyro-phase angle dependent, in-situ-equilibrium grain charge, assuming that the grain charging is instantaneous. For this component, the grain is assumed to be always in its in-situ-equilibrium charge state and this state gyro-synchronously varies with respect to the grain's average charge state. The other component, referred to here as the gyro-phase drift, arises from any non-instantaneous-charging-induced modification of the grad-q drift and points in the direction associated with increasing magnitude of in-situ-equilibrium charge state. Gyro-synchronous grain charge modulation may arise from either abrupt or gradual inhomogeneity in plasma conditions. In the abrupt inhomogeneity, q1 is the in-situ-equilibrium charge on one side of the inhomogeneity, q2 is the in-situ equilibrium charge on the other side, q1 Gyro-synchronous grain charge modulation may arise from either abrupt or gradual inhomogeneity in plasma conditions. In the abrupt inhomogeneity, q1 is the in-situ-equilibrium charge on one side of the inhomogeneity, q2 is the in-situ equilibrium charge on the other side, q1

Indexing (document details)
Advisor: Koepke, Mark E.
Commitee: Cassak, Paul, Lewellen, David, McLaughlin, Maura, Scime, Earl
School: West Virginia University
Department: Eberly College of Arts & Sciences
School Location: United States -- West Virginia
Source: DAI-B 76/09(E), Dissertation Abstracts International
Source Type: DISSERTATION
Subjects: Plasma physics
Keywords: Dusty plasma, Grain charging, Gyro-phase drift, Inhomogeneity, Plasma physics
Publication Number: 3702051
ISBN: 9781321731057
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