Analytic theory of sheath expansion into a cylindrical bore

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871501· OSTI ID:286966

Sheridan, T E ^[1]

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1. Department of Physics, West Virginia University, Morgantown, West Virginia 26506-6315 (United States)

A simple analytic theory describing the expansion of the collisionless, pulsed, plasma sheath into a cylindrical bore is presented. An approximate expression for the Child{endash}Langmuir law is derived, allowing the sheath speed and sheath width to be predicted for quasistatic expansion. The dependence of the ion impact energy on sheath speed is estimated. Finally, the dependence of the maximum ion impact energy on the radius of the bore is calculated from the sheath speed dependence of the ion impact energy and the minimum calculated sheath speed. The theory agrees well with numerical solutions of a time-dependent fluid model. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 286966
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COLLISIONLESS PLASMA
CYLINDRICAL CONFIGURATION
ION IMPLANTATION
PLASMA EXPANSION
PLASMA SHEATH
PLASMA-WALL INTERACTIONS
WALL EFFECTS