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

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 [Formula: see text] using pairs of opposing electrodes. While excitation near the resonance with th...

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Autores principales: Schmidt, Julian, Hönig, Daniel, Weckesser, Pascal, Thielemann, Fabian, Schaetz, Tobias, Karpa, Leon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7547030/
https://www.ncbi.nlm.nih.gov/pubmed/33088025
http://dx.doi.org/10.1007/s00340-020-07491-8
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author Schmidt, Julian
Hönig, Daniel
Weckesser, Pascal
Thielemann, Fabian
Schaetz, Tobias
Karpa, Leon
author_facet Schmidt, Julian
Hönig, Daniel
Weckesser, Pascal
Thielemann, Fabian
Schaetz, Tobias
Karpa, Leon
author_sort Schmidt, Julian
collection PubMed
description 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 [Formula: see text] using pairs of opposing electrodes. While excitation near the resonance with the secular frequency [Formula: see text] only leads to a linear increase of the amplitude with excitation duration, parametric excitation near [Formula: see text] 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 [Formula: see text] ions Doppler cooled, corresponding to a mass selectivity of better than [Formula: see text] . This method can be widely applied to ion trapping experiments without major modifications since it only requires modulating the potential of the ion trap.
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spelling pubmed-75470302020-10-19 Mass-selective removal of ions from Paul traps using parametric excitation Schmidt, Julian Hönig, Daniel Weckesser, Pascal Thielemann, Fabian Schaetz, Tobias Karpa, Leon Appl Phys B Article 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 [Formula: see text] using pairs of opposing electrodes. While excitation near the resonance with the secular frequency [Formula: see text] only leads to a linear increase of the amplitude with excitation duration, parametric excitation near [Formula: see text] 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 [Formula: see text] ions Doppler cooled, corresponding to a mass selectivity of better than [Formula: see text] . This method can be widely applied to ion trapping experiments without major modifications since it only requires modulating the potential of the ion trap. Springer Berlin Heidelberg 2020-10-09 2020 /pmc/articles/PMC7547030/ /pubmed/33088025 http://dx.doi.org/10.1007/s00340-020-07491-8 Text en © The Author(s) 2020 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Schmidt, Julian
Hönig, Daniel
Weckesser, Pascal
Thielemann, Fabian
Schaetz, Tobias
Karpa, Leon
Mass-selective removal of ions from Paul traps using parametric excitation
title Mass-selective removal of ions from Paul traps using parametric excitation
title_full Mass-selective removal of ions from Paul traps using parametric excitation
title_fullStr Mass-selective removal of ions from Paul traps using parametric excitation
title_full_unstemmed Mass-selective removal of ions from Paul traps using parametric excitation
title_short Mass-selective removal of ions from Paul traps using parametric excitation
title_sort mass-selective removal of ions from paul traps using parametric excitation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7547030/
https://www.ncbi.nlm.nih.gov/pubmed/33088025
http://dx.doi.org/10.1007/s00340-020-07491-8
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