Calculation of two-dimensional plasma sheath with application to radial dust oscillations

Journal Article · Fri Jul 15 00:00:00 EDT 2005 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1957127· OSTI ID:20713978

Sheridan, T E ^[1]

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1. Department of Physics and Astronomy, Ohio Northern University, Ada, Ohio 45810 (United States)

Dust particles are often confined radially in a plasma potential well above a cylindrical depression in an otherwise flat electrode. The structure of the two-dimensional, time-independent sheath is computed for this geometry using cold, collisionless ions and Boltzmann electrons. A depression with a radius of 16 Debye lengths and a depth of 2 Debye lengths is modeled for negative electrode biases from 6 to 32 times the electron temperature. The normalized radial oscillation frequency for a dust particle in the well is computed from the sheath potential structure. The model results agree qualitatively with the experimental measurements.

• OSTI ID: 20713978
• Journal Information: Journal of Applied Physics, Vol. 98, Issue 2; Other Information: DOI: 10.1063/1.1957127; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DEBYE LENGTH
DUSTS
ELECTRODES
ELECTRON TEMPERATURE
ELECTRONS
GEOMETRY
OSCILLATIONS
PARTICLES
PLASMA
PLASMA CONFINEMENT
PLASMA POTENTIAL
PLASMA SHEATH
PLASMA SIMULATION
PLASMA WAVES
TWO-DIMENSIONAL CALCULATIONS