Ion Temperature, Charge Exchange, and Coulomb Collisions in an Argon Plasma Column
- 1 June 1968
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 39 (7) , 3297-3299
- https://doi.org/10.1063/1.1656772
Abstract
Ion temperatures in a highly ionized argon plasma column have been measured with a Fabry‐Perot interferometer. Plasma‐column conditions were altered over a range of parameters from 10% to 70% ionized, electron temperature Te=2–10 eV, and magnetic field 1400–2800 G. In general, Ti is about one‐tenth Te, determined by the balance between electron heating and charge‐exchange cooling. The measured values of Ti agree fairly well with those calculated, using accepted values of Coulomb collision and charge‐exchange cross sections. Alternately, the present data are processed to derive approximate values of the charge‐exchange cross section to neutral argon as a function of Ar+ ion energy in the range 0.1–1.0 eV. It can also be concluded that the theoretical rate for electron‐ion energy relaxation is not seriously in error.This publication has 7 references indexed in Scilit:
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