Electron energy distribution functions in Hendash;CO vibrationally excited post discharges

摘要

Electron energy distribution functions (edf) and related parameters have been calculated in the posthyphen;discharge regime of vibrationally excited Hendash;CO mixtures by solving the Boltzmann equation including superelastic vibrational collisions. The calculations point out to the importance of small concentration of CO molecules in affecting both edfthinsp;rsquo;s and related quantities in the posthyphen;discharge reigme. In particular, the mixture closely follows the behavior of pure CO for molar fractions of CO (XCO) approximately equal to 20percnt;. Helium affects edfthinsp;rsquo;s by increasing elastic losses in the post discharge, forXCO20percnt;, leading to average electron temperatures,Te, lower than the corresponding vibrational temperatures, Vthgr;1. The results obtained by using Treanorrsquo;s and Boltzmann distributions emphasize the role of excited vibrational levels (v2) in affecting edf and the average electron energy.