Orthogonal acceleration - coaxially cylinder - mass analyzer

摘要

It is a mass analyzer is disclosed, in which an annular ion guide with a longitudinal axis and a first annular ions guide section and a second annular ions guide section, wherein the annular ion guide comprises: (i) an inner cylindrical electrode arrangement, the axially is segmented and a number of first electrodes, and (ii) an outer cylindrical electrode arrangement, the axially is segmented and a number of second electrodes. Ions, in the first annular ions guide section, so that the ions within the first annular ions guide section about the longitudinal axis essentially stable circular orbits form. Ions are orthogonally out of the first annular ions guide section in the second annular ions guide section is accelerated, and one or more parabolic d.c. potentials, along a part of the second annular ions guide section is maintained, so that ions undergo a simple harmonic motion. An inductive ion detector is set up and designed, ions within the second annular ions guidance portion to detect.