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:
Aug. 28, 2012
Filed:
Jun. 04, 2009
Kenzo Hiraoka, Kofu, JP;
Lee Chuin Chen, Kofu, JP;
Kenzo Hiraoka, Kofu, JP;
Lee Chuin Chen, Kofu, JP;
University of Yamanashi, Kofu-shi, JP;
Abstract
An ionization apparatus comprises a first electrode provided on the outer periphery of a dielectric cylindrical body and a second cylindrical electrode placed inside at a center of the cylindrical body. When an AC high voltage is impressed across the first electrode and the second cylindrical electrode, a barrier discharge occurs within the cylindrical body. A distal end portion of the second cylindrical electrode projects outwardly from the distal end of the cylindrical body, a thermal equilibrium plasma P having a low electron temperature is generated outwardly from the distal end of the cylindrical body without a plasma jet ascribable to the barrier discharge emerging outwardly from the distal end of the cylindrical body. By exposing a sample S to the thermal equilibrium plasma P, particles (atoms, molecules) desorbed from the sample S undergo soft ionization without being decomposed or polymerized.