Patent ID: 7851752
Filing Date: 2010-12-14
Classification: H01J

Abstract:
1. An apparatus that facilitates the transmission of ions in a mass spectrometer, said apparatus comprising a plurality of segmented electrodes, each said electrode comprising alternating electrically insulating and electrically conducting regions, wherein each said electrode includes an aperture for passage of sample ions therethrough, wherein each electrically conducting region of said plurality of electrically conducting regions in each segmented electrode is connected to an RF potential, wherein said RF potential applied to said each electrically conducting region of said each segmented electrode is 180° out of phase from said RF potential applied to an adjacent electrically conducting region of said each segmented electrode, wherein said electrodes are aligned along a common axis such that said electrically conducting regions of each said electrode are aligned with said electrically conducting regions of adjacent said electrodes, and wherein said RF potential applied to said each electrically conducting region that is aligned along an axis of said each segmented electrode is 180° out of phase from said RF potential applied to an adjacent electrically conducting region that is aligned along said axis on an adjacent segmented electrode.