Measurement of the electric charge on particulates forming Coulomb crystals in the sheath of a radiofrequency plasma
- 1 August 1995
- journal article
- Published by IOP Publishing in Plasma Sources Science and Technology
- Vol. 4 (3) , 450-458
- https://doi.org/10.1088/0963-0252/4/3/015
Abstract
Monodisperse electrically charged particulates (9.4 mu m diameter) are trapped in the sheath of an argon RF parallel plate discharge. The particulates form Coulomb crystals consisting of horizontal hexagonal layers. A method for the determination of the charge on the particles is demonstrated that uses the response to a modulation of the electrode bias. Charges about three to five thousand elementary units are measured. The commonly applied orbital motion limited (OML) charging model leads to charges higher than the measured values. The strong coupling system is compared to the one component plasma (OCP model) and to a model with Yukawa potentials.Keywords
This publication has 37 references indexed in Scilit:
- Direct observation of Coulomb crystals and liquids in strongly coupled rf dusty plasmasPhysical Review Letters, 1994
- Coulomb lattice in a weakly ionized colloidal plasmaPhysica A: Statistical Mechanics and its Applications, 1994
- Particle–particle interactions in dusty plasmasJournal of Applied Physics, 1993
- Numerical and experimental diagnostics of rf discharges in pure and dusty argonPhysical Review A, 1992
- Particle thermophoresis in low pressure glow dischargesJournal of Applied Physics, 1991
- Study of volume and surface processes in low pressure radio frequency plasma reactors by pulsed excitation methods. I. Hydrogen–argon plasmaJournal of Vacuum Science & Technology A, 1991
- Particle-plasma interactions in low-pressure dischargesApplied Physics Letters, 1990
- Measurements of charge on submicron particles generated in a sputtering processJournal of Applied Physics, 1990
- I n s i t u laser diagnostic studies of plasma-generated particulate contaminationJournal of Vacuum Science & Technology A, 1989
- Dusty plasmas in the solar systemReviews of Geophysics, 1989