公开(公告)号：US20180182605A1

公开(公告)日：2018-06-28

申请号：US15389118

申请日：2016-12-22

Applicant: Thermo Finnigan LLC

Inventor： Nicholas T. MOLLISON ,  Jaime A. CARRERA ,  Joshua T. MAZE ,  Scott T. QUARMBY

IPC: H01J49/06

CPC classification number: H01J49/067 ,  H01J49/04

Abstract: A mass spectrometry system includes an ion optics stack defining a central longitudinal axis. The ion optics stack includes a circular lens aperture of a first diameter and a circular alignment target having a second diameter. The second diameter is less than the first diameter. The circular alignment target is positioned such that when the ion optics stack is in alignment, the circular lens aperture and circular alignment target appear concentric to an unaided viewer when viewed along the central longitudinal axis of the ion optics stack.