MEASUREMENT CELL FOR ION CYCLOTRON RESONANCE SPECTROMETER

摘要

This invention relates to a measurement cell for a FTMS spectrometer. The measurement cell comprises a longitudinal axis and comprising five or more electrodes arranged about the longitudinal axis including two or more excitation electrodes operable to excite ions in the measurement cell into cyclotron motion and two or more dedicated detection electrodes operable to detect ions within the measurement cell, wherein a plane orthogonal to the longitudinal axis meets the five or more electrodes to define the perimeter of a cross-section, the two or more detection electrodes occupying at least 50% of that perimeter.