Patent ID: 9558925
Date: 2017-01-31
CPC Classifications: H01J

Claim:
1. A single ion funnel device for separating non-ions from ions traveling in a downstream direction comprising: a plurality of electrodes positioned around a center axis of the device and having apertures therein through which the ions are transmitted, wherein an inner diameter of the apertures varies in length and non-linearly from an entrance of the device to an exit of the device, a line of sight from the entrance of the device to the exit of the device, wherein at least a portion of the line of sight is obstructed; and wherein at least a portion of the center axis between the electrodes is non-linear and offset; and a RF voltage applied to each of the electrodes and a DC gradient applied across the plurality of electrodes, wherein the non-ions are pumped away from in between the electrodes; wherein the inner diameter of at least one aperture of the apertures is smaller than the inner diameter of another aperture situated at a bend variation of the center axis downstream from the at least one aperture.