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:
Jul. 19, 2011
Filed:
Nov. 07, 2007
Alexander Makarov, Bremen, DE;
Reinhold Pesch, Weyhe, DE;
Robert Malek, Lilienthal, DE;
Viacheslav Kozlovskiy, Chernogolovka, RU;
Alexander Makarov, Bremen, DE;
Reinhold Pesch, Weyhe, DE;
Robert Malek, Lilienthal, DE;
Viacheslav Kozlovskiy, Chernogolovka, RU;
Thermo Fisher Scientific (Bremen) GmbH, Bremen, DE;
Abstract
An ion transfer arrangement for transporting ions between higher and lower pressure regions of a mass spectrometer includes an electrode assembly () with a first plurality of ring electrodes () arranged in alternating relation with a second plurality of ring electrodes (). The first plurality of ring electrodes () are narrower than the second plurality of ring electrodes () in a longitudinal direction, but the first plurality of ring electrodes have a relatively high magnitude voltage of a first polarity applied to them whereas the second plurality of ring electrodes () have a relatively lower magnitude voltage applied to them, of opposing polarity to that applied to the first set of ring electrodes (). In this manner, ions passing through the ion transfer arrangement experience spatially alternating asymmetric electric fields that tend to focus ions away from the inner surface of the channel wall and towards the channel plane or axis of symmetry.