Abstract
We explore the feasibility of conducting electron ionization (EI) in a radio-frequency (rf) ion source trap for mass spectrometry applications. Electrons are radially injected into a compact linear ion trap in the presence of a magnetic field used essentially to lengthen the path of the electrons in the trap. The device can either be used as a stand-alone mass spectrometer or can be coupled to a mass analyzer. The applied parallel magnetic field and the oscillating rf electric field produced by the trap give rise to a set of coupled Mathieu equations of motion. Via numerical simulations, electron trajectories are studied under varying intensities of the magnetic field in order to determine the conditions that enhance ion production. Likewise, the dynamic behavior of the ions are investigated in the proposed EI source trap and the fast Fourier transform FFT formalism is used to obtain the frequency spectrum from the numerical simulations to study the motional frequencies of the ions which include combinations of the low-frequency secular and the high-frequency micromotion with magnetron and cyclotron frequencies. The dependence of these motional frequencies on the trapping conditions is examined and particularly, the limits of applying a radial magnetic field to the EI ion trap are characterized.
ᅟ
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Dempster, A.J.: The properties of slow canal rays. Phys. Rev. 8(6), 651–662 (1916). doi:10.1103/PhysRev.8.651
Nier, A.O.: A mass spectrometer for routine isotope abundance measurements. Rev. Sci. Instrum. 11(7), 212–216 (1940)
Yue, B., Lee, E.D., Rockwood, A.L., Lee, M.L.: Superimposition of a magnetic field around an ion guide for electron ionization time-of-flight mass spectrometry. Anal. Chem. 77(13), 4167–4175 (2005)
Ouyang, Z., Wu, G., Song, Y., Li, H., Plass, W.R., Cooks, R.G.: Rectilinear ion trap: concepts, calculations, and analytical performance of a new mass analyzer. Anal. Chem. 76(16), 4595–4605 (2004)
Mino, W.K., Spencer, M., Wylde, J., Rafferty D.: “Application of tandem mass spectrometry in a miniature ion trap ms: Measuring btex,” Proceedings of the 60th ASMS Conference on Mass Spectrometry and Allied Topics, Vancouver, Canada, May 2012
SIMION3D. http://simion.com. Accessed 1 Jan 2008
Campbell, S., Chancelier, J.-P., Nikoukhah, R.: Modeling and simulation in SCILAB. In: Modeling and Simulation in Scilab/Scicos with ScicosLab 4.4, pp. 73–106. Springer, New York (2010)
Gao, L., Song, Q., Patterson, G.E., Cooks, R.G., Ouyang, Z.: Handheld rectilinear ion trap mass spectrometer. Anal. Chem. 78(17), 5994–6002 (2006)
Fischer, E.: Die dreidimensionale stabilisierung von ladungstrgern in einem vierpolfeld. Z. Phys. 156, 1–26 (1959)
Li, G.-Z., Werth, G.: The combined trap and some possible applications. Phys. Scr. 46(6), 587–592 (1992)
Bate, D., Dholakia, K., Thompson, R., Wilson, D.: Ion oscillation frequencies in a combined trap. J. Mod. Opt. 39(2), 305–316 (1992)
Huang, Y., Li, G.-Z., Guan, S., Marshall, A.G.: A combined linear ion trap for mass spectrometry. J. Am. Soc. Mass Spectrom. 8(9), 962–969 (1997)
Nakamura, T., Ohtani, S., Wada, M., Okada, K., Katayama, I., Schuessler, H.A.: Ion dynamics and oscillation frequencies in a linear combined trap. J. Appl. Phys. 89(5), 2922–2931 (2001)
Rempel, D., Gross, M.: High pressure trapping in Fourier transform mass spectrometry: A radiofrequency-only-mode event. J. Am. Soc. Mass Spectrom. 3(5), 590–594 (1992)
Chun-Sing, O., Schuessler, H.A.: Confinement of ions created externally in a quadrupole ion trap operated in the combined penning and radio-frequency mode. J. Appl. Phys. 52(4), 2601–2607 (1981)
Leibfried, D., Blatt, R., Monroe, C., Wineland, D.: Quantum dynamics of single trapped ions. Rev. Mod. Phys. 75, 281–324 (2003)
Jackson, J.D.: Classical Electrodynamics, 3rd edn. Wiley, New York, pp 190–191 (1999)
Dahl, D.A.: SIMION for the personal computer in reflection. Int. J. Mass Spectrom. 200(13), 3–25 (2000)
D. Manura. http://simion.com/info/collision_model_hs1.html Accessed 13 Apr 1959
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
ESM 1
(PDF 47 kb)
Rights and permissions
About this article
Cite this article
Vitcher, S., Charvy, C., Dudragne, L. et al. Characterization of an Electron Ionization Source Trap Operating in the Presence of a Magnetic Field Through Computer Simulation. J. Am. Soc. Mass Spectrom. 24, 1130–1136 (2013). https://doi.org/10.1007/s13361-013-0641-x
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13361-013-0641-x