Mass-selective removal of ions from Paul traps using parametric excitation
Abstract: We study a method for mass-selective removal of ions from a Paul trap by parametric excitation. This can be achieved by applying an oscillating electric quadrupole field at twice the secular frequency ωsec using pairs of opposing electrodes. While excitation near the resonance with the secular frequency ωsec only leads to a linear increase of the amplitude with excitation duration, parametric excitation near 2ωsec results in an exponential increase of the amplitude. This enables efficient removal of ions from the trap with modest excitation voltages and narrow bandwidth, therefore, substantially reducing the disturbance of ions with other charge-to-mass ratios. We numerically study and compare the mass selectivity of the two methods. In addition, we experimentally show that the barium isotopes with 136 and 137 nucleons can be removed from small ion crystals and ejected out of the trap while keeping 138Ba+ ions Doppler cooled, corresponding to a mass selectivity of better than Δm/m=1/138. This method can be widely applied to ion trapping experiments without major modifications since it only requires modulating the potential of the ion trap
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Anmerkungen
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Applied physics. B, Lasers and optics. - 126, 11 (2020) , 176, ISSN: 1432-0649
- Schlagwort
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Paul-Falle
- Ereignis
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Veröffentlichung
- (wo)
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Freiburg
- (wer)
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Universität
- (wann)
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2020
- DOI
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10.1007/s00340-020-07491-8
- URN
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urn:nbn:de:bsz:25-freidok-1678675
- Rechteinformation
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Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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25.03.2025, 13:51 MEZ
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Beteiligte
Entstanden
- 2020
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