公开(公告)号：US20200075308A1

公开(公告)日：2020-03-05

申请号：US16563203

申请日：2019-09-06

申请人： Micromass UK Limited

发明人： Martin Green ,  Jason Wildgoose ,  Keith Richardson ,  Kevin Giles ,  Daniel Kenny ,  David Langridge ,  Richard Moulds

IPC分类号： H01J49/42 ,  H01J49/06

摘要： A mass filter is disclosed having at least one electrode (42-48) comprising an aperture (43) or recess. Voltages are applied to the electrodes (42-48) of the mass filter such that ions having mass to charge ratios in a desired range are confined by the electrodes and are transmitted along and through the mass filter, whereas ions (47,49) having mass to charge ratios outside of said desired range are unstable and pass into the aperture (43) or recess such that they are filtered out by the mass filter. The aperture (43) or recess reduces or eliminates the number of ions that would otherwise impact the electrode surface facing the ion transmission axis and hence reduces degradation of the ion transmission properties of the mass filter.

公开(公告)号：US20180174817A1

公开(公告)日：2018-06-21

申请号：US15578053

申请日：2016-05-31

申请人： Micromass UK Limited

发明人： Martin Green ,  Jason Wildgoose ,  Keith Richardson ,  Kevin Giles ,  Daniel Kenny ,  David Langridge ,  Richard Moulds

IPC分类号： H01J49/42 ,  H01J49/06

CPC分类号： H01J49/4215 ,  H01J49/063 ,  H01J49/067 ,  H01J49/4255

摘要： A mass filter is disclosed having at least one electrode (42-48) comprising an aperture (43) or recess. Voltages are applied to the electrodes (42-48) of the mass filter such that ions having mass to charge ratios in a desired range are confined by the electrodes and are transmitted along and through the mass filter, whereas ions (47,49) having mass to charge ratios outside of said desired range are unstable and pass into the aperture (43) or recess such that they are filtered out by the mass filter. The aperture (43) or recess reduces or eliminates the number of ions that would otherwise impact the electrode surface facing the ion transmission axis and hence reduces degradation of the ion transmission properties of the mass filter.

公开(公告)号：US10453667B2

公开(公告)日：2019-10-22

申请号：US15578053

申请日：2016-05-31

申请人： Micromass UK Limited

发明人： Martin Green ,  Jason Wildgoose ,  Keith Richardson ,  Kevin Giles ,  Daniel Kenny ,  David Langridge ,  Richard Moulds

IPC分类号： H01J49/42 ,  H01J49/06

摘要： A mass filter is disclosed having at least one electrode (42-48) comprising an aperture (43) or recess. Voltages are applied to the electrodes (42-48) of the mass filter such that ions having mass to charge ratios in a desired range are confined by the electrodes and are transmitted along and through the mass filter, whereas ions (47,49) having mass to charge ratios outside of said desired range are unstable and pass into the aperture (43) or recess such that they are filtered out by the mass filter. The aperture (43) or recess reduces or eliminates the number of ions that would otherwise impact the electrode surface facing the ion transmission axis and hence reduces degradation of the ion transmission properties of the mass filter.

公开(公告)号：US20240047191A1

公开(公告)日：2024-02-08

申请号：US18259015

申请日：2021-12-23

申请人： Micromass UK Limited

发明人： Jason Wildgoose ,  Martin Green ,  David Langridge ,  Kevin Giles ,  Jakub Ujma

IPC分类号： H01J49/40 ,  G01N27/623 ,  H01J49/02 ,  H01J49/00

CPC分类号： H01J49/403 ,  G01N27/623 ,  H01J49/025 ,  H01J49/005

摘要： A method of analysing ions comprises separating ions according to a first physico-chemical property by passing the ions through an ion separation device, and measuring the transit time of an ion through the ion separation device. The method further comprises detecting the ion using a charge-resolving ion detector so as to determine the charge of the ion, and using the transit time and the charge of the ion to determine a second physico-chemical property of the ion.

公开(公告)号：US10832900B2

公开(公告)日：2020-11-10

申请号：US16563203

申请日：2019-09-06

申请人： Micromass UK Limited

发明人： Martin Green ,  Jason Wildgoose ,  Keith Richardson ,  Kevin Giles ,  Daniel Kenny ,  David Langridge ,  Richard Moulds

IPC分类号： H01J49/42 ,  H01J49/06

摘要： A mass filter is disclosed having at least one electrode (42-48) comprising an aperture (43) or recess. Voltages are applied to the electrodes (42-48) of the mass filter such that ions having mass to charge ratios in a desired range are confined by the electrodes and are transmitted along and through the mass filter, whereas ions (47,49) having mass to charge ratios outside of said desired range are unstable and pass into the aperture (43) or recess such that they are filtered out by the mass filter. The aperture (43) or recess reduces or eliminates the number of ions that would otherwise impact the electrode surface facing the ion transmission axis and hence reduces degradation of the ion transmission properties of the mass filter.