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Acknowledgment to Reviewers of Atoms in 2020
Open AccessArticle

Loading a Paul Trap: Densities, Capacities, and Scaling in the Saturation Regime

Department of Physics, Wesleyan University, Middletown, CT 06459-0155, USA
Received: 21 December 2020 / Revised: 24 January 2021 / Accepted: 26 January 2021 / Published: 29 January 2021
(This article belongs to the Special Issue Low Energy Interactions between Ions and Ultracold Alkali Atoms)
Providing ideal conditions for the study of ion-neutral collisions, we investigate here the properties of the saturated, steady state of a three-dimensional Paul trap, loaded from a magneto-optic trap. In particular, we study three assumptions that are sometimes made under saturated, steady-state conditions: (i) The pseudopotential provides a good approximation for the number, Ns, of ions in the saturation regime, (ii) the maximum of Ns occurs at a loading rate of approximately 1 ion per rf cycle, and (iii) the ion density is approximately constant. We find that none of these assumptions are generally valid. However, based on detailed classical molecular dynamics simulations, and as a function of loading rate and trap control parameter, we show where to find convenient dynamical regimes for ion-neutral collision experiments, or how to rescale to the pseudo-potential predictions. We also investigate the fate of the electrons generated during the loading process and present a new heating mechanism, insertion heating, that in some regimes of trapping and loading may rival and even exceed the rf-heating power of the trap. View Full-Text
Keywords: hybrid ion-neutral traps; Paul trap; ion-neutral collisions; radio-frequency heating; saturation capacity; loading rate; nonlinear; molecular-dynamics simulations hybrid ion-neutral traps; Paul trap; ion-neutral collisions; radio-frequency heating; saturation capacity; loading rate; nonlinear; molecular-dynamics simulations
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MDPI and ACS Style

Blümel, R. Loading a Paul Trap: Densities, Capacities, and Scaling in the Saturation Regime. Atoms 2021, 9, 11. https://0-doi-org.brum.beds.ac.uk/10.3390/atoms9010011

AMA Style

Blümel R. Loading a Paul Trap: Densities, Capacities, and Scaling in the Saturation Regime. Atoms. 2021; 9(1):11. https://0-doi-org.brum.beds.ac.uk/10.3390/atoms9010011

Chicago/Turabian Style

Blümel, Reinhold. 2021. "Loading a Paul Trap: Densities, Capacities, and Scaling in the Saturation Regime" Atoms 9, no. 1: 11. https://0-doi-org.brum.beds.ac.uk/10.3390/atoms9010011

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