Radiant energy – Ionic separation or analysis – Cyclically varying ion selecting field means
Reexamination Certificate
2007-02-27
2007-02-27
Nguyen, Kiet T. (Department: 2881)
Radiant energy
Ionic separation or analysis
Cyclically varying ion selecting field means
C250S281000, C250S282000
Reexamination Certificate
active
11081048
ABSTRACT:
A method of operating an ion filter for selecting ions and related apparatus. The filter have a plurality of elongated electrodes, and the ions have a secular frequency. The method comprises exciting each elongated electrode with a first voltage component, the first voltage component having a first amplitude and a first frequency; exciting each elongated electrode with a second voltage component, the second voltage component having a frequency substantially equal to a secular frequency of motion for the ion; and generating an electric field and rotating the electric field around the axis.
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Agilent Technologie,s Inc.
Nguyen Kiet T.
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