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. 04, 2016
Filed:
Apr. 14, 2015
Thermo Fisher Scientific (Bremen) Gmbh, Bremen, DE;
Thermo Fisher Scientific (Bremen) GmbH, Bremen, DE;
Abstract
A method is proposed for assessing the vacuum conditions in a mass spectrometer () such as an ion cyclotron resonance or orbital trapping mass spectrometer. Such mass spectrometers generate a transient detection signal resulting from ions of one or species in an ion trap (). The parameters of the trap and/or introduced ions are adjusted so as to cause the decay rate of the transient in respect of the ion species to be dominated by collisional effects. Typically this can be achieved by introducing ions into the trap () in quantities such that ion clouds of a particular ion species self bunch. The rate of decay of the transient signal in that case is determined and compared with one or more threshold decay rates. This in turn can provide an indication of vacuum conditions within the trap ().