Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
14 IEEE TRANSACTIONS ON PLASMA SCIENCE, VOL. 30, NO. 1, FEBRUARY 2002 Relaxation of Electrons in Two Space Dimensions in Space-Charge Confined Plasmas D. Uhrlandt and S. Arndt Abstract— The relaxation of the electron component in a cylin- drical dc column plasma is studied by solving the electron kinetic equation in two space dimensions. In particular, the response of the electron gas to a local disturbance of its axial homogeneity under the influence of a radial space-charge confinement is analyzed. Em- phasis is put on the visualization of the electron velocity distribu- tion and the electron particle and energy fluxes. Index Terms— DC column plasma, electron particle and energy fluxes, electron velocity distribution. T HE NONLOCAL kinetic behavior of the electrons is of specific importance for all plasma properties in spatially varying anisothermal plasmas, in particular at lower pressures and ionization degrees. Under such conditions, a strictly space- dependent kinetic treatment of the electron component is ab- solutely necessary for an accurate plasma modeling. This ki- netic treatment can be achieved by the solution of the relevant space-dependent kinetic equation describing the electron ve- locity distribution function (EVDF). Recently, a new method for the solution of the radially and axially inhomogeneous electron kinetic equation related to a cylindrical dc plasma configuration has been developed [1]. The method is based on the two-term expansion of the EVDF in spherical harmonics and is applied here to analyze the electron kinetics in a cylindrical column-like plasma where the axial plasma homogeneity is disturbed. One-dimensional kinetic studies [2] of the relaxation of plasma electrons initiated by such disturbances demonstrate the complex and distinctly nonlocal kinetic behavior of the electrons. However, the elec- tron kinetics in a cylindrical column plasma is influenced in addition by a radial space-charge confinement. Its influence on the axial relaxation and the resulting complex interplay in the electron particle and power budget can be analyzed only by a
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/08/2011 for the course ELECTRICAL 124 taught by Professor Ghjk during the Spring '11 term at Institute of Technology.

Page1 / 2


This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online