公开(公告)号：US20230187193A1

公开(公告)日：2023-06-15

申请号：US18066067

申请日：2022-12-14

Applicant: Waters Technologies Corporation

Inventor： Joseph A. Jarrell ,  Patrick Brophy ,  Alistair J. Schofield

IPC: H01J49/02 ,  H01J49/00

CPC classification number: H01J49/027 ,  H01J49/0031

Abstract: An image charge detection assembly for a mass spectrometer comprising an image charge detector that is housed within an electrically conductive shielding enclosure, and a preamplifier, wherein at least an input stage of the preamplifier, which is electrically connected to the detector, is housed with the detector within the enclosure.

公开(公告)号：US20230187198A1

公开(公告)日：2023-06-15

申请号：US18066099

申请日：2022-12-14

Applicant: Waters Technologies Corporation

Inventor： Joseph A. Jarrell ,  Patrick Brophy ,  Kevin Giles

IPC: H01J49/42 ,  H01J49/00

CPC classification number: H01J49/429 ,  H01J49/4245 ,  H01J49/0036

Abstract: There is provided a method of operating a charge detection mass spectrometer (CDMS), the CDMS comprising an electrostatic ion trap, the electrostatic ion trap comprising a plurality of electrodes, the method comprising: a) introducing a first ion into the electrostatic ion trap at a first ion energy, b) setting the voltage of the plurality of electrodes to a first voltage map, c) obtaining first CDMS data indicative of a first ion oscillation frequency, d) obtaining an acceptable range or ranges of ion oscillation frequencies, e) changing the first ion energy to a second ion energy and/or changing the first voltage map to a second voltage map, and f) obtaining second CDMS data indicative of a second ion oscillation frequency.