Radiant energy – Ionic separation or analysis – Methods
Reexamination Certificate
2011-04-26
2011-04-26
Souw, Bernard E (Department: 2881)
Radiant energy
Ionic separation or analysis
Methods
C250S290000, C250S292000, C250S293000
Reexamination Certificate
active
07932488
ABSTRACT:
An ion guide includes multiple stages. An electric field within each stage guides ions along a guide axis. Within each stage, amplitude and frequency, and resolving potential of the electric field may be independently varied. The geometry of the rods maintains a similarly shaped field from stage to stage, allowing efficient guidance of the ions along the axis. In particular, each rod segment of the ithof stage has a cross sectional radius ri, and a central axis located a distance Ri+rifrom the guide axis. The ratio ri/Riand is substantially constant along the guide axis, thereby preserving the shape of the field.
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Cousins Lisa
Javahery Gholamreza
Jolliffe Charles
Tomski Ilia
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