A variable potential ion guide for placement within the reflectron of a time-of-flight mass spectrometer includes an elongate resistive electrode placed axially within the reflectron. The electrode may be a non-conductive monofilament coated with a resistive polymer coating, with one end of the electrode coupled to a high potential source, the electrode carrying a potential gradient along its length.
University of Northern Iowa Research Foundation
Hanson, Curtiss D., "Explore Variable potential ion guide for mass spectrometry" (2003). Patents (University of Northern Iowa). 10.