Patent · US Active

Ion trap

US8546754B2 · kind B2 · utility

1Cited by

17References

10Claims

0Family size

Assignee

THERMO FISHER SCIENTIFIC (BREMEN) GMBH · DE

Inventors

Alexander A. Makarov · Bremen, DE
Mikhail A. Monastyrskiy · Moscow, RU
Dmitry Grinfeld · Bremen, DE

Key dates

Filing date	Aug 5, 2011
Grant date	Oct 1, 2013
Priority date	—
Expiry date	Aug 5, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/427
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An ion trap comprises substantially elongate electrodes 10, 20 some of which are curved along their axis of elongation and which define a trapping volume between them. The sectional area of this trapping volume towards the extremities of the trap in the direction of elongation is different to the sectional area away from its extremities (eg towards the middle of the trap). In a preferred embodiment, the trap has a plurality of elongate electrodes, wherein opposed electrodes have different radii of curvature so that the trap splays towards its extremities. Thereby, a wider mass range of ions can be trapped and ejected, a higher space charge capacity (for a given trap length) is provided, and sharper ion beam focussing on ejection is possible.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.