Mass spectrometer with tapered ion guide

Details Mass spectrometer with tapered ion guide Mass spectrometer with tapered ion guide

H - Electricity

01

J

H01J 49/40 (2006.01)

Patent

CA 2281405

A mass spectrometer system in which an ion beam from a collision cell, mass analyzer or other ion transmission device is directed into an ion guide formed by a set of spaced part conductive rings, for transmission into a TOF analyzer. The ion guide tapers in height from its entrance to its exit, so that the ion beam is reconfigured into a flat thin sheet of charge having a reduced height and increased width as compared with the original ion beam. The decrease in height reduces spacial dispersion of the ions, increasing the resolution of the TOF, while the increase in width decreases space charge effects, and increases detector dynamic range. Fragmentation of the ions can also be performed in the ion guide, removing the need for a separate collision cell.

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