Ion extraction devices, mass spectrometer devices, and...

Details Ion extraction devices, mass spectrometer devices, and... Ion extraction devices, mass spectrometer devices, and...

2008-07-29

2008-07-29

Wells, Nikita (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S281000, C250S282000, C250S42300F, C250S424000, C250S288000, C250S287000, C250S3960ML

Reexamination Certificate

active

07405401

ABSTRACT:
There is disclosed a method of selectively extracting ions comprising the steps of:providing a supply of ions in a body of gas;generating a ponderomotive ion trapping potential generally along an axis;generating further potentials to provide an effective potential which prevents ions from being extracted from an extraction region;trapping ions in said effective potential; andselectively extracting ions of a predetermined m/z ratio or ion mobility from the extraction region;in which the characteristics of the effective potential which prevent ions from being extracted from the extraction region are caused, at least in part, by the generation of the ponderomotive ion trapping potential.

REFERENCES:
patent: 6585891 (2003-07-01), Ohkawa
patent: 7071467 (2006-07-01), Bateman et al.
patent: 7288942 (2007-10-01), Zhang et al.

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