Radiant energy – Ionic separation or analysis – Ion beam pulsing means with detector synchronizing means
Reexamination Certificate
2007-09-25
2007-09-25
Nguyen, Kiet T. (Department: 2881)
Radiant energy
Ionic separation or analysis
Ion beam pulsing means with detector synchronizing means
C250S286000
Reexamination Certificate
active
11285148
ABSTRACT:
An apparatus for controllably varying specificity of a FAIMS-based ion separation includes a FAIMS analyzer region defined between a first electrode surface and a second other electrode surface. The FAIMS analyzer region is in communication with an ionization source for providing a flow of ions including a known ion, and with an ion outlet for extracting ions including the known ion from the FAIMS analyzer region. The first and second electrode surfaces are for having an asymmetric waveform voltage applied thereacross for defining an average ion flow path for the known ion traversing therebetween. An actuator is provided for controllably moving the first electrode surface relative to the second electrode surface for controllably varying the length of the average ion flow path.
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patent: 6770875 (2004-08-01), Guevremont et al.
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Guevremont et al. “Atmospheric Pressure Ion Focusing in a High-Field Asymmetric Waveform Ion Mobility Spectrometer”, Review of Scientific Instruments, 1999, vol. 70, No. 2, pp. 1370-1383.
Guevremont, legal representative Maria
Kapron James T.
Freedman & Associates
Nguyen Kiet T.
Thermo Finnigan LLC
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