Mass spectrometer

Patent metadata

Field	Value
Publication number	US-8969799-B2
Application number	US-201314080301-A
Country	US
Kind code	B2
Filing date	Nov 14, 2013
Priority date	Dec 8, 2006
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

A mass spectrometer is disclosed comprising a time of flight mass analyzer. The time of flight mass analyzer comprises an ion guide comprising a plurality of electrodes which are interconnected by a series of resistors forming a potential divider. Ions are confined radially within the ion guide by the application of a two-phase RF voltage to the electrodes. A single phase additional RF voltage is applied across the potential divider so that an inhomogeneous pseudo-potential force is maintained along the length of the ion guide.

First claim

The invention claimed is:

1. A mass spectrometer comprising:
an ion guide comprising a plurality of electrodes;
means for confining ions radially within said ion guide; and
means for applying a time varying inhomogeneous axial electric field along at least a portion of an axial length of said ion guide to cause the ions to travel continuously through the ion guide at different speeds depending on their mass to charge ratios or ion mobilities, wherein said means for applying th…

Assignees

• Micromass Ltd

Inventors

• Green Martin Raymond
• Wildgoose Jason Lee

Classifications

• H01J49/065

  Electricity · mapped topic

• H01J49/40 Primary

  Electricity · mapped topic

• H01J49/005

  Electricity · mapped topic

• H01J49/063

  Electricity · mapped topic

• H01J49/066

  Electricity · mapped topic