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Title: Interface and process for enhanced transmission of non-circular ion beams between stages at unequal pressure

Abstract

The invention discloses a new interface with non-circular conductance limit aperture(s) useful for effective transmission of non-circular ion beams between stages with different gas pressure. In particular, the invention provides an improved coupling of field asymmetric waveform ion mobility spectrometry (FAIMS) analyzers of planar or side-to-side geometry to downstream stages such as mass spectrometry or ion mobility spectrometry. In this case, the non-circular aperture is rectangular; other geometries may be optimum in other applications. In the preferred embodiment, the non-circular aperture interface is followed by an electrodynamic ion funnel that may focus wide ion beams of any shape into tight circular beams with virtually no losses. The jet disrupter element of the funnel may also have a non-circular geometry, matching the shape of arriving ion beam. The improved sensitivity of planar FAIMS/MS has been demonstrated in experiments using a non-contiguous elongated aperture but other embodiments (e.g., with a contiguous slit aperture) may be preferable, especially in conjunction with an ion funnel operated at high pressures.

Inventors:
 [1];  [1];  [1]
  1. Richland, WA
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
927858
Patent Number(s):
7,339,166
Application Number:
11/361,264
Assignee:
Battelle Memorial Institute (Richland, WA)
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Tang, Keqi, Shvartsburg, Alexandre A, and Smith, Richard D. Interface and process for enhanced transmission of non-circular ion beams between stages at unequal pressure. United States: N. p., 2008. Web.
Tang, Keqi, Shvartsburg, Alexandre A, & Smith, Richard D. Interface and process for enhanced transmission of non-circular ion beams between stages at unequal pressure. United States.
Tang, Keqi, Shvartsburg, Alexandre A, and Smith, Richard D. Tue . "Interface and process for enhanced transmission of non-circular ion beams between stages at unequal pressure". United States. https://www.osti.gov/servlets/purl/927858.
@article{osti_927858,
title = {Interface and process for enhanced transmission of non-circular ion beams between stages at unequal pressure},
author = {Tang, Keqi and Shvartsburg, Alexandre A and Smith, Richard D},
abstractNote = {The invention discloses a new interface with non-circular conductance limit aperture(s) useful for effective transmission of non-circular ion beams between stages with different gas pressure. In particular, the invention provides an improved coupling of field asymmetric waveform ion mobility spectrometry (FAIMS) analyzers of planar or side-to-side geometry to downstream stages such as mass spectrometry or ion mobility spectrometry. In this case, the non-circular aperture is rectangular; other geometries may be optimum in other applications. In the preferred embodiment, the non-circular aperture interface is followed by an electrodynamic ion funnel that may focus wide ion beams of any shape into tight circular beams with virtually no losses. The jet disrupter element of the funnel may also have a non-circular geometry, matching the shape of arriving ion beam. The improved sensitivity of planar FAIMS/MS has been demonstrated in experiments using a non-contiguous elongated aperture but other embodiments (e.g., with a contiguous slit aperture) may be preferable, especially in conjunction with an ion funnel operated at high pressures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {3}
}

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Works referenced in this record:

Comparison of the planar and coaxial field asymmetrical waveform ion mobility spectrometer (FAIMS)
journal, February 2003


Optimization of the design and operation of FAIMS analyzers
journal, January 2005

  • Shvartsburg, Alexandre A.; Tang, Keqi; Smith, Richard D.
  • Journal of the American Society for Mass Spectrometry, Vol. 16, Issue 1
  • DOI: 10.1016/j.jasms.2004.09.009

High-Sensitivity Ion Mobility Spectrometry/Mass Spectrometry Using Electrodynamic Ion Funnel Interfaces
journal, May 2005

  • Tang, Keqi; Shvartsburg, Alexandre A.; Lee, Hak-No
  • Analytical Chemistry, Vol. 77, Issue 10, p. 3330-3339
  • DOI: 10.1021/ac048315a