Dynamic ion trapping in a cylindrical open cell for Fourier transform ion cyclotron resonance mass spectrometry

Dynamic ion trapping is demonstrated for a Fourier transform ion cyclotron mass spectrometer with an open cylindrical cell. We show experimentally sev eral features of dynamic ion trapping in the open cell: (a) ions can be sel ectively trapped in different regions of the cell, (b) mass selective accum ulation of ions can be performed inside the trapping cylinder, (c) ions can be sequentially transferred between different regions of the cell, and (d) both positive and negative ions may be trapped and detected simultaneously . (C) 2001 Elsevier Science B.V.