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:
Sep. 10, 2024
Filed:
May. 23, 2019
Universite DE Strasbourg, Strasbourg, FR;
Centre National DE LA Recherche Scientifique, Paris, FR;
Emil Traykov, Strasbourg, FR;
UNIVERSITE DE STRASBOURG, Strasbourg, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
Abstract
A method of filtering an ion beam to isolate ions having a targeted charge to mass ratio includes providing a quadrupole mass filter device (), and emitting an ion beam (') from a source () towards a quadrupole mass filter device (). An electrical field is applied between the rods (′) of each pair of opposite rods (′) of the device (), each field being defined by combined direct and alternative potentials, calibrating each of the electrical fields in order to create at least one exact focusing point () at the exit () The method includes generating, by means of rods (′) which are segmented longitudinally, an electrical field extending between and along each pair of segmented rods (′), and calibrating the local field segments by adjusting the settings of their respective individual DC and AC potentials in order to create at least one intermediate node. An unstable motion region or region of variable stability () is created and maintained in the vicinity of and at said at least one intermediate node location.