Mass spectrometer multipole device
AssigneeAgilent Technologies, Inc.
InventorsRobert K. Crawford, James L. Bertsch
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Abstract
The invention provides a multipole device for a mass spectrometer system. In general, the multipole device contains a plurality of conductive rods each comprising a conductive layer, a resistive layer, and an insulative layer between the conductive and resistive layers. The invention finds use in a variety of applications, including ion transport, ion fragmentation and ion mass filtration. Accordingly, the invention may be employed in a variety of mass spectrometer systems.
Claims28
A multipole device for confining and transporting on an axis a uniform radio frequency (RF) field of a mass spectrometry system, comprising:
- a plurality of rods each comprising:
- a conductive layer;
- a resistive layer;
- and
- an insulative layer disposed between the conductive layer and the resistive layer,
- wherein the rods confine and transport ions on an axis in a uniform RF field.
A multipole mass filter comprising:
- a plurality of conductive rods arranged to provide an input end for accepting ions, an output end for ejecting ions of pre-determined mass, and a central axis extending from the input end to the output end,
- wherein one or both of the ends of said rods comprises a conductive layer, a resistive layer, and an insulative layer disposed between the conductive layer and the resistive layer.
A mass spectrometer system, comprising:
- an ion source,
- a multipole device comprising:
- a plurality of rods each comprising:
- a conductive layer;
- a resistive layer;
- and
- an insulative layer disposed between the conductive layer and the resistive layer,
- wherein the rods confine and transport ions on an axis in a uniform RF field;
- and,
- an ion detector.
A method for confining and transporting ions in a multipole device, comprising:
- (a) confining the ions in the multipole device along an axis;
- and
- (b) transporting the ions in a uniform RF field.
Dependencies are inferred from the claim text.