The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 21, 2025
Filed:
Jun. 30, 2022
Bruker Switzerland Ag, Fäellanden, CH;
Urs Steiner, Aarau, CH;
Felician Muntean, Andover, MA (US);
Abstract
A gas retaining ion guide has RF electrodes distributed about an ion region that provide an RF confinement field for ions therein. DC electrodes are also provided that extend from an entrance of the ion guide to an exit, and provide a DC electric field. The DC electrodes are further from the central axis than the RF electrodes, and each provides a gas seal between two adjacent RF electrodes. Conductive surfaces of the DC electrodes establish the DC electric field through gaps between adjacent RF electrodes, and the conductive surfaces have a distance from the central axis that changes over the length of the ion guide so as to provide an axial DC field component. The size of the DC electrode conductive surfaces and a width of the gaps between RF electrodes may be selected to ensure that ions escaping confinement through the gaps are discharged on the conductive surfaces.