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:
Sep. 24, 2024
Filed:
Jun. 14, 2022
Shimadzu Corporation, Kyoto, JP;
Masaru Nishiguchi, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto, JP;
Abstract
An ion analyzer includes an ion optical element having four rod electrodes around an optical axis, for transferring ions from their surrounding space to the subsequent stage while converging the ions. To create an RF electric field within this space, a voltage supplier applies RF voltages of opposite polarities to two pairs of electrodes facing each other across the axis. The cross-sectional shape of each electrode in a plane orthogonal to the axis has a first side having width w facing the axis and is tangent to a circle of radius raround the axis, and two adjacent sides connected to the ends of the first side at an angle determined so that an RF field created by the adjacent sides exerts no influence within the space. The ratio w/ris determined so that the amount of dodecapole field component becomes a predetermined value or does not exceed it.