Agilent Technologies, Inc.
Multipole Ion Optic Assembly

Abstract:

An ion optic assembly includes a set of conductive rods, a first insulator, and a second insulator. The rods are inserted into through-holes of the first insulator, which are arranged about an axis along which the rods are elongated. The rods are then inserted through a bore of the second insulator and become located in notches of the bore, which are arranged about the axis. Accordingly, the first insulator positions one end of the rods at a first distance from the axis, and the second insulator positions the other end of the rods at a second distance from the axis, which may equal to or different from the first distance. The rods contact, and may be spring-biased against, the notches. The assembly may include an electrical contact with fingers spring-biased into contact with the rods. Each insulator may include both through-holes and notches for additional rods.