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Parallel Spectral Acquisition with Orthogonal ICR Cells.

Sung-Gun Park1, Gordon A Anderson2, James E Bruce3

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This study introduces an orthogonal dual Ion Cyclotron Resonance (ICR) mass analyzer system. This novel design enables parallel spectral acquisition, significantly reducing signal acquisition time for high-performance mass spectrometry applications.

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Area of Science:

  • Analytical Chemistry
  • Physical Chemistry
  • Spectroscopy

Background:

  • Fourier Transform (FT)-based mass analyzers offer high resolving power and mass accuracy.
  • Increased signal acquisition duration in FT-based mass analyzers limits certain applications.
  • Previous methods to reduce acquisition time include stronger magnetic fields and multiple mass analyzers along the magnetic field axis.

Purpose of the Study:

  • To investigate the feasibility of implementing multiple Ion Cyclotron Resonance (ICR) mass analyzers orthogonal to the central magnetic field axis.
  • To develop and test an orthogonal dual ICR cell system for parallel spectral acquisition.

Main Methods:

  • Constructed an orthogonal dual ICR cell system with a master cell on-axis and a slave cell off-axis using printed circuit boards.
  • Developed an ion transfer method using a DC field applied perpendicularly to the magnetic field axis for drifting ions between cells.
  • Performed simultaneous excitation of ions in both cells and independently amplified and recorded ICR signals in parallel.

Main Results:

  • Successfully implemented and tested an orthogonal dual ICR cell array within a single magnet and vacuum system.
  • Demonstrated parallel spectral acquisition from both the master and slave ICR cells.
  • Achieved successful ion transfer between the orthogonal cells.

Conclusions:

  • The orthogonal dual ICR cell array is a viable approach to decrease signal acquisition time.
  • Parallel spectral acquisition using an orthogonal ICR cell system is achievable.
  • This technology has the potential to expand the applicability of high-performance mass analyzers.