Electron current to a cylindrical probe in a moving high pressure plasma

Journal Article · Mon Feb 01 04:00:00 EST 1993 · IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/27.221123· OSTI ID:6233540

Dawe, J; Rizvi, S A.H.; Smy, P R ^[1]

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1. Univ. of Alberta, Edmonton (Canada)

A theoretical expression has been developed for the electron current which flows to a positively biased cylindrical probe immersed in a moving, high pressure plasma. Experimental results obtained with an atmospheric pressure plasma show good agreement with the theory and are similar to those obtained recently by other experimenters. Essentially, the theory states that under given conditions, namely, where the sheath convection mode is dominant, the electron current to a negatively biased probe is approximately equal to the ion current that would flow to a negatively biased probe multiplied by a factor equal to the ratio of the electron and ion mobilities. A separate measurement of the thickness of the electron sheath is also found to be in good agreement with the theory. Because of the much higher magnitude of the electron current to a probe (versus the ion current), electron current measurement can provide far more accurate data in many circumstances.

• OSTI ID: 6233540
• Journal Information: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 21:1; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
CATIONS
CHARGED PARTICLES
CONVECTION
ELECTRIC PROBES
ELECTRICAL PROPERTIES
ELECTRODES
ELECTRON DENSITY
ELECTRON MOBILITY
ENERGY TRANSFER
HEAT TRANSFER
ION DENSITY
ION MOBILITY
IONS
LANGMUIR PROBE
MASS TRANSFER
MATHEMATICAL MODELS
MOBILITY
PARTICLE MOBILITY
PHYSICAL PROPERTIES
PLASMA
PLASMA DIAGNOSTICS
PLASMA SHEATH
PROBES