Micro-Particles as Electrostatic Probes for Plasma Sheath Diagnostic

Journal Article · Sun Sep 07 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2996976· OSTI ID:21251264

Wolter, Matthias; Haass, Moritz; Ockenga, Taalke; Kersten, Holger ^[1]; Blazec, Joseph ^[2]; Basner, Ralf ^[3]

---

1. IEAP, University Kiel, Kiel (Germany)
2. Department of Physics, University of South Bohemia (Czech Republic)
3. Leibniz-Institute for Plasma Science and Technology, Greifswald (Germany)

An interesting aspect in the research of complex (dusty) plasmas is the experimental study of the interaction of micro-particles of different sizes with the surrounding plasma for diagnostic purpose. In the plasma micro-disperse particles are negatively charged and confined in the sheath. The particles are trapped by an equilibrium of gravity, electric field force and ion drag force. From the behavior, local electric fields can be determined, e.g. particles are used as electrostatic probes. In combination with additional measurements of the plasma parameters with Langmuir probes and thermal probes as well as by comparison with an analytical sheath model, the structure of the sheath can be described. In the present work we focus on the behavior of micro-particles of different sizes and several plasma parameters e.g. the gas pressure and the rf-power.

• OSTI ID: 21251264
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1041; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPARATIVE EVALUATIONS
ELECTRIC FIELDS
ELECTROSTATIC PROBES
EQUILIBRIUM
GRAVITATION
INTERACTIONS
IONS
LANGMUIR PROBE
PARTICLES
PLASMA
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
PLASMA SHEATH
PLASMA WAVES
RF SYSTEMS
TRAPPING