Method and apparatus for plasma generation
AssigneeSionex Corporation
InventorsRaanan A. Miller, Erkinjon G. Nazarov, Evgeny Krylov, Gary A. Eiceman, John A. Wright, Stephen D. Kendig, C. James Morris, Douglas B. Cameron
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Abstract
An RF-driven plasma source, including a pair of spaced-apart plasma electrodes, wherein the electrodes act as plates of a capacitor, the gas electrically discharges and creates a plasma of both positive and negative ions, in a clean process that enables efficient sample analysis, with preferred isolated sample photo-ionization, reduced-power operation and also including signal detection with modulated drive electronics.
Claims21
(canceled)
A compact differential mobility spectrometer (DMS) analyzer comprising:
- an ionization source,
- a chip-based DMS filter for passing select ions from the ionization source through an analytical gap, the analytical gap being defined by at least one pair of filters electrodes,
- a driver circuit for providing a filter signal to the at least one pair of filter electrodes, the driver circuit including a voltage combiner for combining a time-varying signal with and a DC signal to form the filter signal.
A method for analyzing a sample comprising:
- ionizing a portion of the sample,
- passing through select sample ions using a chip-based ion mobility based filter, the ion mobility based filter including at least one pair of filters electrodes,
- combining a time-varying signal with and a DC signal using a voltage combiner to form a filter signal, and
- providing the filter signal to the at least one pair of filter electrodes.
Dependencies are inferred from the claim text.