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:
Dec. 28, 2010
Filed:
Apr. 13, 2007
Alexander Makarov, Cheadle Hulme, GB;
Mikhail Monastyrskiy, Moscow, RU;
Dimitry E. Grinfield, Moscow, RU;
Alexander Makarov, Cheadle Hulme, GB;
Mikhail Monastyrskiy, Moscow, RU;
Dimitry E. Grinfield, Moscow, RU;
Thermo Fisher Scientific (Bremen) GmbH, Bremen, DE;
Abstract
A method for reducing the energy spread of ions over a specific and limited mass to charge ratio range is disclosed, along with an ion deceleration arrangement for implementing such a method. An electric field, having an electric field strength E is generated by a deceleration electrode arrangement (). Ions of a specific and limited mass to charge ratio range, but having a spread of energies, are directed into the decelerating electric field generated by the deceleration electrode arrangement (). The decelerating electric field is then removed, once substantially all of the ions of the specific mass to charge ratio range have entered the decelerating electric field. By matching the electric field strength E to the energy spread of the ions upon entry into the electric field, the energy spread of the said ions is reduced. Preferred embodiments of the invention employ energy dispersion upstream of the ion deceleration arrangement. For example, an ion mirror arrangement () may be used, the ions reflecting off an ion mirror () within that ion mirror arrangement () to promote energy defocusing.