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Trajectory compensation in an autoresonant trap mass spectrometer
Author(s) -
Ermakov A. V.,
Hinch B. J.
Publication year - 2011
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/jms.1937
Subject(s) - trap (plumbing) , ion trap , chemistry , mass spectrometry , quadrupole ion trap , compensation (psychology) , limiting , trapping , range (aeronautics) , anharmonicity , ion , resolution (logic) , ion trapping , analytical chemistry (journal) , atomic physics , computational physics , physics , aerospace engineering , mechanical engineering , psychology , ecology , organic chemistry , chromatography , quantum mechanics , artificial intelligence , meteorology , computer science , psychoanalysis , engineering , biology
The auto‐resonant trap mass spectrometer, ART‐MS, utilizes electrostatic ion trapping within an anharmonic potential well. Ions are detected after mass selective trap ejection with auto‐resonant driving employing only low‐power rf electronics. We identify the major limiting factor in the mass resolution of these instruments. Whilst keeping in the spirit of maintaining a rapid scan rate, low cost, lightweight instrument, with minimal required machining tolerances, we introduce a method for much improving the mass resolutions of an ART‐MS. The addition of two electrodes has enabled an improvement in the mass resolution by a factor of ∼4. The scheme significantly reduces the effects of a finite sized trap and compensates for the influence of radial variation in natural oscillating frequencies within the trap. Compensation can be implemented with a wide range of designs and is not limited by the size of the trap. Copyright © 2011 John Wiley & Sons, Ltd.