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Nonlinear Effects in Paul Traps Operated in the Second Stability Region: Analytical Analysis and Numerical Verification

  • Research Article
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Journal of The American Society for Mass Spectrometry

Abstract

Paul trap working in the second stability region has long been recognized as a possible approach for achieving high-resolution mass spectrometry (MS), which however is still far away from the experimental implementations because of the narrow working area and inefficient ion trapping. Full understanding of the ion motional behavior is helpful for solving the problem. In this article, the ion motion in a superimposed octopole field, which was characterized by the nonlinear Mathieu equation, was solved analytically using Poincare-Lighthill-Kuo (PLK) method. This method equivalently described the nonlinear disturbance by an effective quadrupole field with perturbed Mathieu parameters, a ′ u and q ′ u , which would bring huge convenience in the studies of nonlinear ion dynamics and was, therefore, used for rapid evaluation of the nonlinear effects of ion motion. Fourth-order Runge-Kutta method (4th R-K) indicated the error of PLK for characterizing the frequency shift of ion motion was within 15%.

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Acknowledgments

This work was supported by grants from the National Natural Sciences Foundation of China (grants 21175139, 21205123, 21305144, 21321003, and 21127901), and the Chinese Academy of Sciences.

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Authors and Affiliations

  1. Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry Chinese Academy of Sciences, Beijing, 100190, China

    Caiqiao Xiong, Xiaoyu Zhou, Ning Zhang, Lingpeng Zhan, Suming Chen & Zongxiu Nie

  2. Beijing National Laboratory for Molecular Sciences, Beijing, 100190, China

    Caiqiao Xiong, Xiaoyu Zhou, Ning Zhang, Lingpeng Zhan, Suming Chen & Zongxiu Nie

  3. Beijing Center for Mass Spectrometry, Beijing, 100190, China

    Zongxiu Nie

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  1. Caiqiao Xiong
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  2. Xiaoyu Zhou
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Xiong, C., Zhou, X., Zhang, N. et al. Nonlinear Effects in Paul Traps Operated in the Second Stability Region: Analytical Analysis and Numerical Verification. J. Am. Soc. Mass Spectrom. 25, 1882–1889 (2014). https://doi.org/10.1007/s13361-014-0979-8

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