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:
Mar. 29, 1994
Filed:
Dec. 23, 1992
Applicant:
Inventors:
Jochen Franzen, Bremen, DE;
Reemt-Holger Gabling, Bremen, DE;
Assignee:
Bruker-Franzen Analytik GmbH, Bremen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250292 ; 250282 ;
Abstract
An improved scanning method used in an ion trap mass spectrometer comprises controlling the amplitude of the excitation RF during the mass scan to produce a smooth, nonlinear, highly suitable function. A smooth function is a function with a steady derivative. According to one embodiment of the invention, the excitation amplitude is set proportionally to the square root of the storage amplitude, thus making the excitation amplitude proportional to the root of the mass number.