A measurement of drift velocity and longitudinal diffusion coefficient of electrons in pure carbon dioxide
Recently we determined a set of electron collision cross sections for carbon dioxide molecule by analyzing electron swarm data measured in dilute CO{sub 2}-Ar mixtures. This cross section set predicts existence of a prominent peak in the longitudinal diffusion coefficient of electrons in pure CO{sub 2} gas, which has not been observed experimentally. In the present study, we have measured the drift velocity W and the gas number density times the longitudinal diffusion coefficient, ND{sub L}, of electrons in pure carbon dioxide gas over the E/N range 0.25-100 Td and confirmed the existence of a peak in the ND{sub L} as our cross section set predicts. This fact indicates the correctness of the magnitude of the resonance peak for the vibrational excitation cross section determined in our swarm study using CO{sub 2}-Ar mixtures.
- OSTI ID:
- 212792
- Report Number(s):
- CONF-950749--; CNN: Grant A063002033
- Country of Publication:
- United States
- Language:
- English
Similar Records
Boltzmann equation analysis of electron-molecule collision cross sections in water vapor and ammonia
Application of Momentum Transfer Theory for Ion and Electron Transport in Pure Gases and in Gas Mixtures