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:
Feb. 14, 2023
Filed:
Sep. 14, 2021
Shimadzu Corporation, Kyoto, JP;
Yoshihiro Ueno, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto, JP;
Abstract
In order to suppress a charge-up in an ion source configured to ionize a component contained in a sample gas, a mass spectrometer according to the present invention is provided with an ion source () including: an ionization chamber () having an ion ejection opening () and internally having a space substantially separated from an outside area; a repeller electrode (), located within the ionization chamber, for creating an expelling electric field which acts on an ion generated within the ionization chamber to expel the ion through the ion ejection opening to the outside area; and a voltage generator () configured to selectively apply, to the repeller electrode, a first voltage for creating the expelling electric field and a second voltage for creating a charge-up-removing electric field, where the second voltage is a positive voltage having a larger absolute value than the first voltage.