Computational Analysis of Quadrupole Mass Filters Employing Nontraditional Waveforms
Abstract
Quadrupole mass filters using non-sinusoidal driving potentials present exciting opportunities for new functionality. Predicting figures of merit like resolving power and transmission efficiency helps characterize these emerging devices. To this end, matrix methods of solving the Hill equation of ion motion are employed to calculate stability diagrams and pseudopotential well depth maps in the a,q plane for arbitrary waveforms. The theoretical resolving power and well depth of digital, trapezoidal and sinusoidal mass filters are compared. Simplified expressions for digital mass filter operation are presented.
- Publication:
-
Journal of The American Society for Mass Spectrometry
- Pub Date:
- June 2016
- DOI:
- 10.1007/s13361-016-1358-4
- Bibcode:
- 2016JASMS..27.1122B
- Keywords:
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- Quadrupole mass filter;
- Digital waveforms;
- Pseudopotential;
- Resolving power;
- Matrix methods