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:
Apr. 18, 2006
Filed:
Aug. 23, 2002
Michael R. Hammer, Sassafras, AU;
Michael R. Hammer, Sassafras, AU;
Varian Austrailia PTY LTD, Mulgrave, AU;
Abstract
A plasma source for a spectrometer includes a plasma torch () located within a waveguide or resonant cavity () for both the electric and the magnetic field components of a microwave electromagnetic field to excite a plasma (). This produces a plasma () having a generally elliptical cross section into which sample is relatively easily injected but which still provides good thermal coupling between the plasma and the sample. The invention gives significantly improved limits of detection compared to prior art microwave induced plasma systems. The torch is preferably axially aligned with the direction of the magnetic field component and may be located within a resonant iris () within the waveguide or cavity ().