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Multi-reflecting time-of-flight mass spectrometer with isochronous curved ion interface

一种飞行时间质谱、飞行时间的技术，应用在质谱分析领域

Active Publication Date: 2008-04-30
LECO CORPORATION
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The second limiting factor is the phase space of the ion packets in the ion source, especially when using the ion trap converter

Method used

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  • Multi-reflecting time-of-flight mass spectrometer with isochronous curved ion interface
  • Multi-reflecting time-of-flight mass spectrometer with isochronous curved ion interface
  • Multi-reflecting time-of-flight mass spectrometer with isochronous curved ion interface

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Embodiment Construction

[0082] As highlighted above, multi-reflection plane time-of-flight analyzers are designed for high resolution and full mass range measurements. They are particularly attractive in combination with ion trap pulse converters. However, the resolution of planar MR TOF MS is mainly limited by ion implantation around the edge of the ion mirror. The second limiting factor is the phase space of the ion packets in the source, especially if an ion trap converter is used.

[0083] A prior art planar MR TOF MS is represented in Figure 1A. The planar MR TOF MS analyzer 11 includes two elongated planar gridless ion mirrors 12 and a periodic lens 14 . The ions travel between the mirrors along a jig-saw path reflected periodically by the mirrors 12 . The angle of incidence ("drift angle") of the ions to the mirror is typically about 1 degree. Lens 14 refocuses the ions and thus keeps them confined along a central path inclined by 1 degree. A small drift angle allows a substantial extensi...

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Abstract

The present invention relates generally to a multi-reflecting time-of-flight mass spectrometer (MR TOF MS). To improve mass resolving power of a planar MR TOF MS (11), a spatially isochronous and curved interface (21) may be used for ion transfer in and out of the MR TOF analyzer (11). One embodiment comprises a planar MR TOF MS (11) with periodic lenses (14) in the field-free space, a linear ion trap (17) for converting ion flow into pulses and a C-shaped isochronous interface made of electrostatic sectors. The interface (21) allows transferring ions around the edges and fringing fields (13) of the ion mirrors (12) without introducing significant time spread. The interface (21) may also provide energy filtering of ion packets. The non-correlated turn-around time of ion trap converter (17) may be reduced by using a delayed ion extraction from the ion trap and excessive ion energy is filtered in the curved interface (21).

Description

[0001] For cross-references to related applications [0002] This application claims, under 35 U.S.C. §119(e), U.S. Provisional Patent filed March 22, 2005, entitled "MULTI-REFLECTING TIME-OF-FLIGHT MASSSPECTROMETER WITH AN ENERGY FILTER," filed by Anatoli N. Verentchikov et al. Priority to Application No. 60 / 664,062, the entire disclosure of which is hereby incorporated by reference. technical field [0003] The present invention relates generally to the field of mass spectrometry and, more particularly, to mass spectrometer apparatus, including a multiple reflection time-of-flight mass spectrometer (MR TOF MS) and a method of use. Background technique [0004] Increasing popularity of time-of-flight mass spectrometry (MR TOF MS) - both as a stand-alone instrument and as a mass spectrometer with another TOF (TOF-TOF), with a quadruple filter (Q-TOF), or with an ion trap (ITMS-TOF) Part of the assay cascade. They offer a unique combination of high speed, sensitivity, mass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/40
CPCH01J49/406H01J49/408H01J49/48H01J49/0004
Inventor 阿纳托利·N·维雷恩特奇科夫米克海尔·雅沃尔
Owner LECO CORPORATION
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