High Precision Measurements of Carbon Disulfide Negative Ion Mobility and Diffusion
Abstract
High precision measurements were made of reduced mobility, lateral and longitudinal diffusion of CS2- negative ions in 40 Torr CS2 and a 30 - 10 Torr CS2 - CF4 gas mixture. The reduced mobility was found to be 353.0 +/- 0.5 cm^2 Torr / s V in CS2 and 397.4 +/- 0.7 cm^2 Torr / s V in the CS2 - CF4 gas mixture at STP. The lateral diffusion temperatures for these two gases (295 +/- 15 K and 297 +/- 6 K) were found to be in good agreement with room temperature. By contrast longitudinal diffusion temperature was found to be slightly elevated (319 +/- 10 (stat) +/- 8 (sys) K and 310 +/- 20 (stat) +/- 6 (sys) K) though given the errors, room temperature diffusion can not be ruled out. For lateral diffusion significant capture distances (0.21 +/- 0.07 mm and 0.15 +/- 0.03 mm) were measured while for longitudinal diffusion the results were not conclusive.
Cite
@article{arxiv.1301.7145,
title = {High Precision Measurements of Carbon Disulfide Negative Ion Mobility and Diffusion},
author = {D. P. Snowden-Ifft and J. -L. Gauvreau},
journal= {arXiv preprint arXiv:1301.7145},
year = {2015}
}
Comments
Published by Review of Scientific Instruments but with some errors. These have been fixed. This version is more accurate than the published version