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

A novel broadband ion axialization method has been developed for Fourier transform ion cyclotron resonance mass spectrometry based on Penning trapping of ions. Ions of arbitrary mass-to-charge ratio range(s) may be driven to the center of the trap (axialization) by azimuthal quadrupolar irradiation with repeated low-amplitude stored-wave-form inverse Fourier transform excitations in the presence of a buffer gas. We demonstrate highly mass-selective axialization and subsequent high-resolution Fourier transform ion cyclotron resonance detection of ions spanning a mass-to-charge ratio range of 500.