Patent ID: 7786435
Filing Date: 2010-08-31
Classification: H01J

Abstract:
1. An apparatus for trapping ions, comprising: (a) an array of electrodes; (b) AC voltages having different relative phase applied to adjacent electrodes of said array of electrodes; (c) at least one DC offset voltage applied to said electrodes of said array of electrodes; (d) at least one counter electrode; (e) at least one DC voltage applied to said at least one counter electrode; (f) at least one back electrode behind said array of electrodes; (g) at least one DC voltage applied to said at least one back electrode; (h) means to control said AC and DC voltages to trap ions in one or more trapping regions proximal to said array of electrodes; and (i) means for generating a magnetic field proximal to said array of electrodes; and (j) means for controlling the intensity of said magnetic field.