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A mass filter based on an accelerating traveling wave
Author(s) -
Wiedenbeck Michael,
Kasemset Bodin,
Kasper Manfred
Publication year - 2008
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.3407
Subject(s) - acceleration , stack (abstract data type) , kinetic energy , chemistry , traveling wave , ion , filter (signal processing) , energy (signal processing) , ion beam , mass spectrometry , resolution (logic) , computational physics , mechanics , analytical chemistry (journal) , physics , classical mechanics , electrical engineering , chromatography , computer science , engineering , mathematical analysis , mathematics , organic chemistry , quantum mechanics , artificial intelligence , programming language
We describe a novel mass filtering concept based on the acceleration of a pulsed ion beam through a stack of electrostatic plates. A precisely controlled traveling wave generated within such an ion guide will induce a mass‐selective ion acceleration, with mass separation ultimately accomplished via a simple energy‐filtering system. Crucial for successful filtering is that the velocity with which the traveling wave passes through the ion guide must be dynamically controlled in order to accommodate the acceleration of the target ion species. Mass selection is determined by the velocity and acceleration with which the wave traverses the ion guide, whereby the target species will acquire a higher kinetic energy than all other lighter as well as heaver species. Finite element simulations of this design demonstrate that for small masses a mass resolution M/ΔM ≈ 1000 can be achieved within an electrode stack containing as few as 20 plates. Some of the possible advantages and drawbacks which distinguish this concept from established mass spectrometric technologies are discussed. Copyright © 2008 John Wiley & Sons, Ltd.