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High-resolution mass separation by phase splitting and fast centering of ion motion in a Penning trap

P. Dupre 1 D. Lunney 1
1 CSNSM SNO
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière : UMR8609
Abstract : A new technique for fast and effective mass separation of isobaric-contaminant ions is presented based on the continuous control of the phase and magnetron radius of ions orbiting in a Penning trap. Inspired by two techniques: Phase imaging ion cyclotron resonance (PI-ICR) (Eliseev et al., 2013) and magnetron-orbit manipulation (Mortensen et al., 2013), this method does not require ion cooling. First, isobaric species are separated in the radial plane by mass-selective excitations. A radial, position-selective dipole excitation pulse is then applied to re-center only the ions of interest. This paper presents the theoretical analysis of the process with detailed simulations. Results are compared to another buffer-gas free technique: Simultaneous Magnetron and resonant COnversion (SIMCO) excitation (Rosenbusch et al., 2012). Despite a lower maximum resolving power, the new process is twice as fast as SIMCO. (C) 2015 Published by Elsevier B.V.
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Submitted on : Thursday, May 21, 2015 - 9:47:33 AM
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P. Dupre, D. Lunney. High-resolution mass separation by phase splitting and fast centering of ion motion in a Penning trap. International Journal of Mass Spectrometry, Elsevier, 2015, 379 (issue SI), pp.33-45. ⟨10.1016/j.ijms.2014.12.007⟩. ⟨in2p3-01154060⟩

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