Negative ion drift velocities in mixtures of methane and sulphur hexafluoride
- 1 October 1986
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 19 (10) , 1889-1894
- https://doi.org/10.1088/0022-3727/19/10/013
Abstract
The velocities of negative ions drifting in mixtures of methane and sulphur hexafluoride have been measured. Measurements were made as a function of gas composition, reduced electric field strength between 3 and 185 Td, and total gas pressure in the range 100-600 Torr at 300K. The data indicate that SF6- (SF6) ions are the dominant ion in all of the gas mixtures studied. Extrapolation of the data using Blanc's Law was used to determine the velocity of sulphur hexafluoride ions drifting in pure methane.Keywords
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