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|Title:||Experimental study of longitudinal end effects in transverse diffusion measurements of Na+ ion swarms in He gas|
|Authors:||Tan, T.L. |
|Citation:||Tan, T.L., Ong, P.P., Hogan, M.J. (1994). Experimental study of longitudinal end effects in transverse diffusion measurements of Na+ ion swarms in He gas. Journal of Physics D: Applied Physics 27 (1) : 84-89. ScholarBank@NUS Repository. https://doi.org/10.1088/0022-3727/27/1/012|
|Abstract:||The inevitable presence of longitudinal end effects in drift-tube mass spectrometers, if not corrected for, can cause significant systematic errors in measurements of ion transport coefficients. In our transverse diffusion measurements of Na+ ions in He and several other ion-neutral pairs, appreciable longitudinal end effects were detected for sufficiently high values of E÷N, the ratio of electric field to neutral gas number density. Systematic measurements at various drift length and analysis reveal that these end effects are generally more pronounced for ion-neural pairs with very low or very high mass ratio. They can be either positive or negative and their magnitudes can be quantified by a simple linear relationship of the transverse ion current density profile with drift length.|
|Source Title:||Journal of Physics D: Applied Physics|
|Appears in Collections:||Staff Publications|
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