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MS: Fachverband Massenspektrometrie
MS 2: Ionenfallen- und FT-IZR-MS, Moleküle, Cluster, Zerfälle und Reaktionen
MS 2.6: Talk
Monday, March 10, 2008, 18:00–18:15, 3E
SIMION simulations of ion trajectories in a novel Quadrupole Mass Filter / ICR cell with an unusual geometry — •Basem Kanawati1,2 and Karl-Peter Wanczek1 — 1Institute of Physical and Inorganic Chemistry, University of Bremen, FB 2, Leobener Str., NW 2, D- 28334 Bremen, Germany — 2GSF, Institut of Ecological Chemistry , Ingolstädter Landstraße 1 , D-85764 Neuherberg , Germany
An open cylindrical design has been investigated for trapping ions under the influence of a combined DC/RF electric field with presence and absence of a strong magnetic field. The simulated ion trajectories indicate the possibility of this design to confine ions in the 3D region inside the trap for further processing events, such as radial ion excitation and axial ion ejection. Therefore, the device can be useful for both ICR and quadrupole ion trap techniques. The new design has a specific geometry with concentric ring electrodes of different diameters. The cell is axially segmented into five different ring electrodes. This establishes three effective stability regions inside the detection region for trapping and detecting both ion polarities simultaneously under ICR conditions. 3D analysis of electric potential distribution inside this new design gives explanation for some interesting and unusual ion behaviour discerned in this trap.
Reference: Characterisation of a New Open Cylindrical ICR Cell for Ion-Ion Collision Studies. B. Kanawati, K. P. Wanczek, Int. J. Mass Spectrom. (2007),DOI:10.1016/j.ijms.2007.09.007