Planar ion processing station
In one aspect, an ion guide for use in a mass spectrometer is disclosed, which comprises a pair of printed circuit boards (PCBs) having an inlet for receiving a plurality of ions from an upstream ion source and outlet through which the ions exit the ion guide. The ion guide includes at least two ion paths provided in the space between the two PCBs for transmission of ions from the inlet to the outlet. The ion guide can further include at least one ion-routing device that can be coupled to the ions paths for selecting a propagation path of the ions between those ion paths. In some embodiments, the two ion paths can have at least one segment in common.
1 . An ion guide for use in a mass spectrometer, comprising:
an inlet for receiving a plurality of ions from an upstream ion source and an outlet through which ions can exit the ion guide,
at least two ion paths extending from said inlet to said outlet, wherein said at least two ion paths have a common proximal segment for receiving ions from said inlet and a common distal segment through which the ions exit through said outlet,
an ion routing device coupled to said at least two ion paths for establishing a propagation path of said ions along a first or second ion path, among said at least two ion paths, from said inlet to said outlet,
two substantially flat surfaces between which said first and second ion paths are formed, and
a plurality of ion-guiding conductive electrodes disposed on said two surfaces and configured for application of RF and/or DC voltages thereto for guiding the ions along said first and second ion paths,
wherein said ion routing device comprises a plurality of conductive posts disposed between said two surfaces to which one or more RF and/or DC voltages can be applied for generating a field for diverting ions from one of said first and second ion paths to the other of said first and second ion paths.
2 . The ion guide of claim 1 , further comprising a controller for providing one or more control signals to said ion routing device for selecting said first or said second ion path for propagation of the ions from said inlet to said outlet.
3 . The ion guide of claim 1 , wherein each conductive electrode on each of said two surfaces is in substantial register with a conductive electrode on the opposed surface so as to provide one or more pairs of opposed conductive electrodes, wherein across each pair of said opposed conductive electrodes one or more RF and/or a DC voltages can be applied.
4 . The ion guide of claim 1 , further comprising an RF source and a DC source for applying said RF and/or DC voltages to said conductive posts.
5 . The ion guide of claim 4 , wherein said controller is in communication with said RF and DC voltage source for controlling application of said RF and/or DC voltages to said posts.
6 . The ion guide of claim 1 , further comprising an RF source and a DC source for applying said RF and/or DC voltages to said ion-routing electrodes.
7 . The ion guide of claim 6 , wherein said controller is in communication with said RF and DC voltage source for controlling application of said RF and/or DC voltages to said electrodes.
8 . The ion guide of claim 1 , wherein said first and second ion paths have different lengths.
9 . The ion guide of claim 1 , wherein said two surfaces comprise two opposed surfaces of two printed circuit boards (PCBs).
10 . The ion guide of claim 1 , wherein at least one of said first and second ion paths provides a serpentine ion propagation path.
11 . An ion guide for use in a mass spectrometer, comprising:
two printed circuit boards (PCBs) positioned relative to one another such that two surfaces of the PCBs are opposed relative to one another and are separated by a gap providing an ion transmission passageway between said two surfaces, wherein said passageway comprises an inlet for receiving ions and an outlet through which ions exit the passageway,
a plurality of ion guiding electrodes disposed on said surfaces to which RF and/or DC voltages can be applied for guiding the ions from said inlet to said outlet, wherein said plurality of electrodes are arranged on said surfaces so as to provide first and second ion paths for transmission of the ions from said inlet to said outlet, and
an ion routing device for establishing a propagation path for the ions received from said inlet to said outlet along said first or said second ion path,
wherein said ion routing device comprises a plurality of electrically conductive posts disposed between said opposed surfaces to which RF and/or DC voltages can be applied for diverting the ions from one of said first and second ion paths to the other of said first and second ion paths.
12 . The ion guide of claim 11 , wherein said plurality of posts are configured to provide structural support for maintaining the separation between said two printed circuit boards.
13 . The ion guide of claim 11 , further comprising a controller in communication with said ion routing device for applying control signals thereto such that said ion routing device selects one of said first and second ion paths for transmission of the ions from said inlet to said outlet.
14 . The ion guide of claim 11 , wherein said first and second ion paths have at least one segment in common.