Patent · US Expired

Pulsers for time-of-flight mass spectrometers with orthogonal ion injection

US6903332B2 · kind B2 · utility

36Cited by

6References

13Claims

0Family size

Assignee

Bruker Daltonik GmbH · DE

Inventors

Gerhard Weiss · Ludwigshafen, DE
Carsten Stoermer · Bremen, DE
Oliver Räther · Lilienthal, DE

Key dates

Filing date	Nov 25, 2002
Grant date	Jun 7, 2005
Priority date	—
Expiry date	Nov 25, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH01J49/06
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to the construction and operation of a slit diaphragm pulser for a time-of-flight mass spectrometer with orthogonal injection of the ions to be examined. The invention includes switching three diaphragm potentials during a transition from a filling phase to an acceleration phase in order to maintain a potential along the axis of the injected ion beam at a constant level, to prevent any penetration by the accelerating fields during the filling phase and to obtain extremely high mass resolution in the acceleration phase through a lens effect.

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