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. 04, 1989
Filed:
Aug. 05, 1987
Applicant:
Inventor:
Martin Allemann, Hinwil, CH;
Assignee:
Spectrospin AG, , CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250291 ; 250290 ; 250292 ; 250293 ; 250282 ;
Abstract
For eliminating undesirable charged low-mass particles from the measuring cell of an ion cyclotron resonance spectrometer the electrodes normally required for exciting the cyclotron movement are supplied with an rf voltage having a frequency twice as high as the resonance frequency of the trapping oscillation of the charged particles between the trapping electrodes provided perpendicularly to the homogenous magnetic field of the spectrometer. In this manner, the low-mass charged particles are excited to perform trapping oscillations in the direction of the homogenous magnetic field which cause the charged particles to overcome the trapping potentials and, thus, to be eliminated.