Patent · US Active

Ion transfer arrangement with spatially alternating DC and viscous ion flow

US8148680B2 · kind B2 · utility

13Cited by

7References

13Claims

0Family size

Assignee

THERMO FISHER SCIENTIFIC (BREMEN) GMBH · DE

Inventors

Alexander A. Makarov · Bremen, DE
Reinhold Pesch · Weyhe, DE
Robert Malek · Lilienthal, DE
Viacheslav Kozlovskiy · Chernogolovka, RU

Key dates

Filing date	Nov 7, 2007
Grant date	Apr 3, 2012
Priority date	—
Expiry date	Apr 20, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH01J3/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method of transporting gas and entrained ions between higher and lower pressure regions of a mass spectrometer comprises providing an ion transfer conduit 60 between the higher and lower pressure regions. The ion transfer conduit 60 includes an electrode assembly 300 which defines an ion transfer channel. The electrode assembly 300 has a first set of ring electrodes 305 of a first width D1, and a second set of ring electrodes of a second width D2 (≧D1) and interleaved with the first ring electrodes 305. A DC voltage of magnitude V1 and a first polarity is supplied to the first ring electrodes 205 and a DC voltage of magnitude V2 which may be less than or equal to the magnitude of V1 but with an opposed polarity is applied to the second ring electrodes 310. The pressure of the ion transfer conduit 60 is controlled so as to maintain viscous flow of gas and ions within the ion transfer channel.

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