Interface ion guide

Abstract

An interface ion guide for transmitting ions from a stacked ring ion guide (SRIG) to a multipole ion guide, the interface ion guide having a longitudinal axis and comprising n set(s) of plate electrode(s), wherein n≥1; each set of plate electrodes comprising two or more plate electrodes; each plate electrode comprising a plate, the plate comprising a planar surface and an aperture formed in the planar surface for transmission of ions therethrough along the longitudinal axis, wherein the plate of each plate electrode is spaced apart from the plate of an adjacent plate electrode along the longitudinal axis; each plate electrode further comprising one or more protrusions, wherein each protrusion extends at a respective non-zero angle to the planar surface, wherein the protrusion(s) of each set of plate electrodes are configured to generate an RF multipole field to focus ions towards the longitudinal axis. A method of transmitting ions from a stacked ring ion guide (SRIG) to a multipole ion guide using the interface ion guide is provided.

Dependencies are inferred from the claim text.