Patent ID: 8507848
Filing Date: 2013-08-13
Classification: H01J

Abstract:
1. An device for ion guiding, comprising: electrodes made of fine wire, disposed in multiple layers along an axis which defines the ion guiding direction; a voltage supply for supplying voltages to said wire electrodes in each layer to generate at least an electric field that focuses ions towards the said guiding axis; wherein said wire electrodes of each layer comprise at least two fine wires that are held straight and positioned with certain distance from the said guiding axis, and said wire electrodes of each layer are rotated a fixed angle about the guiding axis with respect to those of the neighboring layers so that the wires in multiple layers form a cage-like structured transparent ion guiding tunnel around the guiding axis; and a power supply for providing voltages to wire electrodes of each layer in order to form focusing field along the ion guiding axis.