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Some properties of ion trajectories in the radial plane of an axially symmetric ion trap
Author(s) -
Sheretov Ernst P.,
Philippov Igor V.,
Karnav Tatiana B.,
Ivanov Vladimir W.
Publication year - 2002
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.765
Subject(s) - chemistry , axial symmetry , ion , trap (plumbing) , ion trap , plane (geometry) , atomic physics , geometry , physics , organic chemistry , mathematics , meteorology
In this article we analyse the trajectories of externally generated ions injected in the radial plane into the ion trap. The shape of the envelope curves for two‐dimensional (2D) ion trajectories is determined. Conditions under which these envelope curves can be transformed into circles are found. We show that the amplitude of ion oscillations is a minimum in this case and that this mode corresponds to optimised ion trapping conditions. Also we discuss a ring‐shaped ion trap mass spectrometer electrode system which consists of two ring electrodes, and which utilises ion trajectories with circular envelope curves. Copyright © 2002 John Wiley & Sons, Ltd.