BROAD-BAND AXIALIZATION IN AN ION-CYCLOTRON RESONANCE ION-TRAP

A novel broadband ion axialization method has been developed for Fouri er transform ion cyclotron resonance mass spectrometry based on Pennin g trapping of ions. Ions of arbitrary mass-to-charge ratio range(s) ma y be driven to the center of the trap (axialization) by azimuthal quad rupolar irradiation with repeated low-amplitude stored-wave-form inver se Fourier transform excitations in the presence of a buffer gas. We d emonstrate highly mass-selective axialization and subsequent high-reso lution Fourier transform ion cyclotron resonance detection of ions spa nning a mass-to-charge ratio range of 500.