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US 6,512,224 B1Granted
Longitudinal field driven field asymmetric ion mobility filter and detection system
AssigneeThe Charles Stark Draper Laboratory, Inc.
InventorsRaanan A. Miller, Markus Zahn
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Abstract
An asymmetric field ion mobility spectrometer with an ionization source for ionizing a sample media and creating ions. An ion filter is disposed in the analytical gap downstream from the ionization source for creating an asymmetric electric field to filter the ions. An ion flow generator for creating an electric field in a direction transverse to the asymmetric electric field and which propels the ions through the asymmetric electric field towards a detector.
Claims14
An asymmetric field ion mobility spectrometer comprising:
- an ionization source for ionizing a sample media and creating ions;
- an analytical gap;
- an ion filter disposed in the analytical gap downstream from the ionization source, and including a pair of spaced electrodes for creating an asymmetric electric field to filter the ions;
- an ion flow generator including a plurality of spaced discrete electrodes insulated from the pair of spaced electrodes for creating an electric field transverse to the asymmetric electric field for propelling ions through the asymmetric electric field;
- and
- an ion detector for sensing ions not filtered by the ion filter.
3 more elements
An asymmetric field ion mobility spectrometer comprising:
- an ionization source for ionizing a sample media and creating ions;
- an analytical gap enclosed by a housing;
- an ion filter disposed in the analytical gap downstream from the ionization source, and including electrodes on an inside surface of the housing for creating an asymmetric electric field to filter the ions;
- an ion flow generator including electrodes proximate but insulated with respect to the ion filter electrodes for creating an electric field transverse to the asymmetric electric field for propelling ions through the asymmetric electric field;
- and
- an ion detector for sensing ions not filtered by the ion filter.
3 more elements
Dependencies are inferred from the claim text.