English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We study a method for mass-selective removal of ions from a Paul trap byparametric excitation. This can be achieved by applying an oscillating electricquadrupole field at twice the secular frequency $\omega_{\text{sec}}$ usingpairs of opposing electrodes. While excitation near the resonance with thefrequency $\omega_{\text{sec}}$ only leads to a linear increase of theamplitude with excitation duration, parametric excitation near $2\,\omega_{\text{sec}}$ results in an exponential increase of the amplitude. Thisenables efficient removal of ions from the trap with modest excitation voltagesand narrow bandwidth, therefore substantially reducing the disturbance of ionswith other charge-to-mass ratios. We numerically study and compare the massselectivity of the two methods. In addition, we experimentally show that thebarium isotopes with 136 and 137 nucleons can be removed from small ioncrystals and ejected out of the trap while keeping $^{138}\text{Ba}^{+}$ ionsDoppler cooled, corresponding to a mass selectivity of better than $\Delta m /m = 1/138$. This method can be widely applied to ion trapping experimentswithout major modifications, since it only requires modulating the potential ofthe ion trap.

Mass-selective removal of ions from Paul traps using parametric excitation