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:
Oct. 18, 2022
Filed:
Nov. 20, 2019
Applicant:
Jeol Ltd., Tokyo, JP;
Inventor:
Masaaki Ubukata, Tokyo, JP;
Assignee:
JEOL Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 49/10 (2006.01); G01N 30/72 (2006.01); H01J 49/04 (2006.01);
U.S. Cl.
CPC ...
G01N 30/7206 (2013.01); H01J 49/0422 (2013.01); H01J 49/0486 (2013.01); H01J 49/10 (2013.01);
Abstract
In a mass spectrometry apparatus, an electric field is applied to an injected specimen to ionize the specimen, and mass spectrometry of the specimen is performed. In an emitter which ionizes the specimen, a flashing process to increase a temperature of the emitter is repeatedly performed at a short-time interval during an injection period of the specimen. A flashing current controller controls a flashing current value to be applied to the emitter to increase, in a long term, a flashing temperature which the emitter reaches in the flashing process.