RF-driven ion-ion long-range interaction in a new open cylindrical ICR cell

Several approaches have been implemented to study ion-ion interactions of singly charged positive and negative ions in a new open five sectional cylindrical ICR cell with an unusual geometry, capable to trap and detect both positive and negative ions in different axial regions simultaneously. Single shot experiments, which were initially done in an attempt to achieve ion-ion interactions, did not lead to neutralization of the reactant ions, therefore RF pulse and pulse sequences with different shapes, frequencies and durations were implemented to establish longer axial overlaps between positive and negative ions in a shared central region. These RF-driven ion-ion spatial overlaps are discussed in detail in this article. Specific characteristic behaviours of the new ICR cell have been also studied. (C) 2008 Elsevier B.V. All rights reserved.