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. 26, 2017
Filed:
May. 14, 2014
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Masaru Nishiguchi, Osaka, JP;
Akiko Imazu, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto-shi, Kyoto, JP;
Abstract
An off-axis ion transport optical system () including a front-stage quadrupole ion guide (), a rear-stage quadrupole ion guide (), and an ion deflector () is disposed inside an intermediate vacuum chamber () in a stage next to an ionization chamber () maintained at an atmospheric pressure. Both of the quadrupole ion guides (and) have the same configuration as that of a conventional ion guide that transports ions while trapping the ions using a radio-frequency electric field. The ion deflector () includes a pair of parallel flat electrodes (and) and deflects ions using a direct-current electric field. By causing the deflected ions to reach the ion receiving range of the rear-stage quadrupole ion guide (), it is possible to efficiency introduce ions while deflecting the ions. Meanwhile, the ions and neutral particles are separated from each other in the ion deflector (). This provides an off-axis structure ion transport optical system that achieves a high ion transmission efficiency with a simple structure.