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Ion focusing

United States Patent

November 10, 2015
View the Complete Patent at the US Patent & Trademark Office
The invention generally relates to apparatuses for focusing ions at or above ambient pressure and methods of use thereof. In certain embodiments, the invention provides an apparatus for focusing ions that includes an electrode having a cavity, at least one inlet within the electrode configured to operatively couple with an ionization source, such that discharge generated by the ionization source is injected into the cavity of the electrode, and an outlet. The cavity in the electrode is shaped such that upon application of voltage to the electrode, ions within the cavity are focused and directed to the outlet, which is positioned such that a proximal end of the outlet receives the focused ions and a distal end of the outlet is open to ambient pressure.
Cooks; Robert Graham (West Lafayette, IN), Baird; Zane (West Lafayette, IN), Peng; Wen-Ping (Shoufeng, TW)
14/ 391,867
May 16, 2013
GOVERNMENT INTEREST This invention was made with government support under DE-FG02-06ER15807 awarded by the Department of Energy. The government has certain rights in the invention.