Please use this identifier to cite or link to this item:
Title: An apparatus for measuring DT/K without in-vacuum mechanical motion
Authors: Ong, P.P. 
Hogan, M.J. 
Issue Date: 1991
Citation: Ong, P.P., Hogan, M.J. (1991). An apparatus for measuring DT/K without in-vacuum mechanical motion. Review of Scientific Instruments 62 (4) : 1047-1053. ScholarBank@NUS Repository.
Abstract: A new drift-tube apparatus has been developed for measuring D T/K, the ratio of the transverse diffusion coefficient to the mobility of ions in a neutral gas under the influence of an electric field. It harnesses existing technology in mechanical, electronic, materials, and computer engineering. The main features are the ion current detector, which comprises 65 parallel rods, and an external mechanical multiplexer, which was designed to have extremely low (fA order) leakage currents and noise levels. Unlike with other earlier systems, the need for precise mechanical motion or adjustments of experimental conditions inside the drift tube during data collection has been circumvented. Its design therefore simplifies construction and makes operation less error prone. Data collection is computer controlled. A value for D T/K can now typically be obtained in less than 20 min, which greatly increases the rate at which results can be obtained as well as reduces the chance of unwanted variations in experimental conditions occurring during data collection. Results are estimated to be accurate to within 3%.
Source Title: Review of Scientific Instruments
ISSN: 00346748
DOI: 10.1063/1.1142056
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jun 8, 2023


checked on Jun 8, 2023

Page view(s)

checked on Jun 8, 2023

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.