Patent ID: 7329866
Filing Date: 2008-02-12
Classification: H01J

Abstract:
1. A two-dimensional ion trap comprising: a first and second trapping plate located in a first and second terminals of the ion trap device; a set of four quadrupole rods located in the center; a set of electrodes located between the set of four quadrupole rods; a control circuitry for applying a predetermined voltage to said first and second trapping plates; a RF circuitry constructed and arranged for applying a RF voltage to said set of four quadrupole rods to generate a main two dimensional quadrupole field; an AC offset circuitry constructed and arranged for applying an AC voltage to a pair of said set of four quadrupole rods to generate a main dipole field; a DC circuitry constructed and arranged for applying a DC voltage to said set of electrodes to superimposes a two dimensional electrically variable electrodes octopole field within said two dimensional quadrupole field.