Patent ID: 9053915
Filing Date: 2015-06-09
Classification: H01J

Abstract:
1. A mass spectrometer having an inlet that is maintained, at a first pressure and a region that is maintained at a second pressure that is less than the first pressure, the inlet configured to receive an ion guide, wherein the ion guide comprises: a substrate comprising a plurality of electrodes disposed thereover, the substrate forming a first opening at a first end and a second opening at a second end, wherein the first opening is configured to receive ions at the first pressure; a plurality of trenches provided in the substrate, wherein each of the plurality of trenches is provided between a respective adjacent pair of the plurality of electrodes; means for applying a radio frequency (RF) voltage between adjacent pairs of the plurality of electrodes, wherein the RF voltage creates a field in a region defined by the substrate; and means for applying a direct current (DC) voltage drop along a length of each of the plurality of electrodes.