Patent ID: 8946625
Filing Date: 2015-02-03
Classification: G21K,H01J

Abstract:
1. An apparatus for introducing ions into a space-restricted magnetic field in a direction of magnetic field lines of the magnetic field, the ions being generated in an ion supply located outside the magnetic field and being transported to an ion storage device located inside the magnetic field; the apparatus comprising: an ion guide having a plurality of coaxial ring diaphragms, each diaphragm having an axis parallel to the direction of magnetic field lines and being located in a region of greatest increase in the magnetic field between the ion supply and the ion storage device; an RF generator for generating RF voltages with at least two phases, the RF voltages being applied to plurality of ring diaphragms so that in the direction of magnetic field lines the ring diaphragms are connected to RF voltages with alternating phases; a first non-trapping multipole ion guide positioned adjacent to the ring diaphragm ion guide to guide the ions from the ion supply into the ring diaphragm ion guide; and a second non-trapping multipole ion guide positioned adjacent to the ring diaphragm ion guide to guide the ions from the ring diaphragm ion guide into the ion storage device.