Ion beam transport in gas-filled radio-frequency quadrupoles at intermediate pressures |
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| Authors: | I V Kurnin and M I Yavor |
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| Institution: | (1) Chemical Sciences Division, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, TN 37831, USA;(2) Physics Division, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, TN 37831, USA |
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| Abstract: | Ion transport and focusing in radio-frequency (rf) quadrupole channels filled with a buffer gas at an intermediate pressure
(100–1000 Pa) are studied theoretically through numerical simulation based on a combined model of ion-molecule interactions.
The simulations uncovered specific effects that appear in the considered gas pressure range: “quasi-absolute” stability of
motion of small-mass ions and radial boundedness of the ion focusing region. |
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