Circuit for applying supplementary voltages to RF multipole...

Details Circuit for applying supplementary voltages to RF multipole... Circuit for applying supplementary voltages to RF multipole...

2005-01-18

2005-01-18

Nguyen, Kiet T. (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S290000

Reexamination Certificate

active

06844547

ABSTRACT:
A circuit is described for applying RF and AC voltages to the elements or electrodes of an ion trap or ion guide. The circuit includes an RF transformer having a primary winding and a secondary winding. The secondary winding includes at least two filars. A broadband transformer adapted to be connected to a source of AC voltage applies AC voltage across the low-voltage end of two of the filars. Another broadband transformer connected to the filars at the high-voltage end provides a combined RF and AC output for application to selected electrodes. Also described is a circuit employing a multi-filar RF transformer and broadband transformers for applying RF and AC voltages to spaced rods of a linear ion trap. Also described is a circuit employing a multi-filar RF transformer and broadband transformers for applying RF and AC voltages to the electrodes in each section of a linear ion trap of the type having a center section and end sections, and different DC voltages to the electrodes in the end sections.

REFERENCES:
patent: 5089703 (1992-02-01), Schoen et al.
patent: 5302826 (1994-04-01), Wells
patent: 5420425 (1995-05-01), Bier et al.
patent: 5468957 (1995-11-01), Franzen
patent: 5747801 (1998-05-01), Quarmby et al.
patent: 6111358 (2000-08-01), Cardwell et al.
patent: 0303495 (2003-04-01), None

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