公开(公告)号：WO2023026192A1

公开(公告)日：2023-03-02

申请号：PCT/IB2022/057895

申请日：2022-08-23

Applicant: DH TECHNOLOGIES DEVELOPMENT PTE. LTD.

Inventor： COX, David M. ,  GUNA, Mircea ,  KANG, Yang ,  MANOLESCU, Mircea ,  SONOC, Andrei

IPC: H01J49/42

Abstract: An ion mass filter for use in a mass spectrometer is disclosed, which includes a plurality of rods arranged in a multipole configuration to provide a passageway through which ions can travel, said plurality of rods being configured for application of RF voltages thereto to generate an electromagnetic field within the passageway for providing radial confinement of the ions and further configured for application of a DC voltage thereto, and at least two pairs of auxiliary electrodes interspersed between the plurality of multipole rods, where one pair forms a first pole of the auxiliary electrodes and the other pair forms a second pole of the auxiliary electrodes. A controller can provide one or more control signals to the DC voltage source so as to switch the polarity of the DC voltage differential between the two poles according to a predefined criterion.