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Unintended parametric ejection of ions from an ion cyclotron resonance trap by two- electrode axialization.
- Source :
-
European journal of mass spectrometry (Chichester, England) [Eur J Mass Spectrom (Chichester)] 2009; Vol. 15 (2), pp. 283-91. - Publication Year :
- 2009
-
Abstract
- Azimuthal quadrupolar excitation is a commonly used technique in the field of ion cyclotron resonance mass spectrometry, in particular in combination with buffer-gas collisions to achieve axialization of the stored ions. If the quadrupolar excitation is applied with only one phase to a set of two opposing ring segments (rather than the "regular" method where two sets of electrodes are addressed with opposite polarities), parametric resonance effects at the frequencies 2nu(z) and nu(p) = nu(+) - nu(-) can lead to unintended ejection of ions from the trap. These parametric resonances have been revisited both theoretically and experimentally: multipole components of different azimuthal excitation schemes are derived by a simple vector representation of the excitation signal applied to the ring segments. Thus, parametric contributions can be easily identified, as demonstrated for the two-electrode and the four-electrode quadrupolar excitation schemes as well as further examples. In addition, the effect of the single-phase two-electrode quadrupolar excitation is demonstrated for storage and axialization of cluster ions.
Details
- Language :
- English
- ISSN :
- 1469-0667
- Volume :
- 15
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- European journal of mass spectrometry (Chichester, England)
- Publication Type :
- Academic Journal
- Accession number :
- 19423913
- Full Text :
- https://doi.org/10.1255/ejms.962