US 12,243,734 B2
Switchable ion guide
Henning Wehrs, Bremen (DE); Johannes Schwieters, Ganderkesee (DE); and Gerhard Jung, Delmenhorst (DE)
Assigned to Thermo Fisher Scientific (Bremen) GmbH, Bremen (DE)
Filed by Thermo Fisher Scientific (Bremen) GmbH, Bremen (DE)
Filed on Dec. 4, 2023, as Appl. No. 18/528,491.
Application 18/528,491 is a continuation of application No. 17/612,092, granted, now 11,862,450, previously published as PCT/EP2020/064004, filed on May 19, 2020.
Claims priority of application No. 1907171 (GB), filed on May 21, 2019.
Prior Publication US 2024/0177985 A1, May 30, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01J 49/06 (2006.01); F16K 1/20 (2006.01); H01J 49/00 (2006.01); H01J 49/02 (2006.01); H01J 49/10 (2006.01); H01J 49/42 (2006.01)
CPC H01J 49/063 (2013.01) [F16K 1/2007 (2013.01); H01J 49/005 (2013.01); H01J 49/0077 (2013.01); H01J 49/022 (2013.01); H01J 49/065 (2013.01); H01J 49/067 (2013.01); H01J 49/068 (2013.01); H01J 49/105 (2013.01); H01J 49/421 (2013.01); H01J 49/4215 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ion optical arrangement for use in a mass spectrometer comprising:
a collision cell defining an ion optical axis along which ions may pass;
electrodes comprising a set of parallel poles arranged in the collision cell;
a voltage source for providing voltages to the electrodes to produce electric fields;
wherein the ion optical arrangement is arranged for switching between a first operation mode in which the collision cell is pressurized and a second operation mode in which the collision cell is substantially evacuated, and
wherein the ion optical arrangement is further arranged for producing a radio frequency electric focusing field with the electrodes in the first operation mode and a static electric focusing field with the electrodes in the second operation mode.