Patent · US Active

Ion guide with reduced noding effect

US11728155B2 · kind B2 · utility

0Cited by

6References

17Claims

0Family size

Assignee

THERMO FISHER SCIENTIFIC (BREMEN) GMBH · DE

Inventors

Henning Wehrs · Bremen, DE
Johannes Schwieters · Ganderkesee, DE
Gerhard Jung · Delmenhorst, DE

Key dates

Filing date	May 19, 2020
Grant date	Aug 15, 2023
Priority date	—
Expiry date	Jul 4, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/4215
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An ion optical arrangement (1) for use in a mass spectrometer comprises electrodes (11, 12, 14) comprising a multipole arrangement defining an ion optical axis, and a voltage source for providing voltages to the electrodes to produce electric fields. The ion optical arrangement is configured for producing a radio frequency electric focusing field for focusing ions on the ion optical axis. The radio frequency electric focusing field has a varying frequency so as to reduce any mass dependence of ion trajectories through the ion optical arrangement. The ion optical arrangement may further be configured for producing a static electric field in response to a DC bias voltage applied to the multipole arrangement. A superimposed varying electric field may be produced by superimposing an AC voltage upon the DC bias voltage.

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