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Related Experiment Videos

Halo ion trap mass spectrometer.

Daniel E Austin1, Miao Wang, Samuel E Tolley

  • 1Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA. austin@chem.byu.edu

Analytical Chemistry
|March 6, 2007
PubMed
Summary
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A new halo ion trap uses toroidal geometry and microfabrication for radio frequency mass analysis. This open-structure device offers improved ion trapping and analysis volume for mass spectrometry applications.

Area of Science:

  • Analytical Chemistry
  • Physics

Background:

  • Conventional ion traps often use hyperbolic electrodes, limiting their geometry and accessibility.
  • Microfabrication technology enables novel electrode designs for advanced analytical instruments.

Purpose of the Study:

  • To introduce a novel radio frequency ion trap mass analyzer utilizing toroidal geometry.
  • To demonstrate the capabilities of the halo ion trap for mass analysis.

Main Methods:

  • The halo ion trap employs two parallel ceramic plates with concentric ring electrodes.
  • Radio frequency potentials are applied to individual rings to establish electric fields.
  • Microfabrication techniques were used to create the device's intricate electrode structure.

Main Results:

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  • The toroidal geometry provides a large trapping volume, enhancing ion capacity.
  • Preliminary mass spectra achieved a resolution (m/Deltam) of 60-75.
  • The device operates effectively at 1.9 MHz and 500 Vp-p.

Conclusions:

  • The halo ion trap represents a novel approach to radio frequency ion trapping.
  • Its design offers advantages in ion storage, analysis volume, and accessibility for in situ ionization.
  • The demonstrated resolution indicates potential for sensitive mass analysis applications.