ToF mass analyser with improved resolving power

Patent metadata

Field	Value
Publication number	US-9136100-B2
Application number	US-201213655220-A
Country	US
Kind code	B2
Filing date	Oct 18, 2012
Priority date	Oct 21, 2011
Publication date	Sep 15, 2015
Grant date	Sep 15, 2015

Abstract

A time of flight analyzer that comprises a pulsed ion source; a non-linear ion mirror having a turn-around point; and a detector. The pulsed ion source is configured to produce an ion pulse travelling along an ion flight axis, the ion pulse comprising an ion group consisting of ions of a single m/z value, the ion group having a lateral spread. The non-linear ion mirror is configured to reflect the ion group, at the turn-around point, along the ion flight axis towards the detector, the passage of the ion group through the non-linear ion mirror causing a spatial spread of the ion group. The time of flight mass analyzer has at least one lens positioned between the ion source and the ion mirror, wherein the or each lens is configured to reduce said lateral spread so as to provide a local minimum of lateral spread within the ion mirror.

First claim

The invention claimed is:

1. A time of flight analyser comprising:
a pulsed ion source;
a non-linear ion mirror having a turn-around point;
a detector;
an ion flight axis extending from the pulsed ion source to the detector via the turn-around point of the non-linear ion mirror, the ion flight axis defining a x-direction; and
a y-axis defining a y-direction and a z-axis defining a z-direction, the y-axis and the z-axis being mutually orthogonal and orthogonal to the ion fl…

Assignees

• Shimadzu Corp

Inventors

• Giles Roger
• Gill Matthew Clive

Classifications

• H01J49/0031

  Electricity · mapped topic

• H01J49/401 Primary

  Electricity · mapped topic

• H01J49/40 Primary

  Electricity · mapped topic

• H01J49/067

  Electricity · mapped topic