MULTIPOLE ION GUIDES UTILIZING SEGMENTED AND HELICAL ELECTRODES, AND RELATED SYSTEMS AND METHODS
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United States of America Patent
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Issued Date -
Jun 23, 2016
app pub date -
Dec 23, 2014
filing date -
Dec 23, 2014
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Abandoned
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Abstract
An ion guide generates a multipole radio frequency (RF) field to radially confine ions to an ion beam along a guide axis as the ions are transmitted through the ion guide. The effective potential of the RF field has a magnitude on the guide axis that is independent of axial position along the guide axis, and presents no potential wells on-axis. The ion guide may include a plurality of axially spaced electrodes partitioned into transversely spaced segments. Alternatively, the ion guide may include a plurality of helical electrodes wound about the guide axis.
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