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Laser-cooled Be+ for improved antihydrogen trapping and magnetometry / JOANNA PESZKA

Swansea University Author: JOANNA PESZKA

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DOI (Published version): 10.23889/SUthesis.65173

Abstract

We have laser-cooled beryllium ions in a Penning-Malmberg trap dedicated for antihydrogen formation. This trap is combined with a magnetic minimum trap to confine antihydrogen. This can be used to assist in the studies of antihydrogen in two distinct ways. The first application of the cold 9Be+ is t...

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Published: Swansea, Wales, UK 2023
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Madsen, Niels.
URI: https://cronfa.swan.ac.uk/Record/cronfa65173
first_indexed 2023-12-01T11:27:16Z
last_indexed 2024-11-25T14:15:31Z
id cronfa65173
recordtype RisThesis
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With this assistance we expect to produce colder antihydrogen and ultimately enhance the trapping rates of antihydrogen inside a magnetic trap by at least an order of magnitude. This would greatly improve measurements of antihydrogen properties allowing for increased precision. Cold Be+ could also be used for in-situ measurements of magnetic fields in our antihydrogen traps. The method proposed in this work is to measure an electron spin-flip transition frequency in the ground state of Be+, which is highly sensitive to the external magnetic field strength. The electron spin-flip transition could be induced by microwave radiation and detected via fluorescence from laser-cooling transition. Magnetometry plays a crucial role in trapped antihydrogen research, especially for antimatter gravity measurement performed at high magnetic fields. Also, with increasing precision of the antihydrogen spectroscopy measurements, the uncertainty of the magnetic field will increase the contribution to the systematic errors. Additionally, the benefit of using electron spinflip in Be+ is that it could be used to characterise the strength of the microwaves inside the ALPHA-2 trap. In this work, the feasibility of magnetometry using 9Be+ inside the ALPHA&#x2019;s Penning trap was studied. The microwave induced electron spin-flip in Be+ was observed for the first time within the ALPHA apparatus. The uncertainty of the external magnetic field derived from this proof-of-principle measurement was comparable to the currently used Electron Cyclotron Resonance method and there are prospects for significant improvement. 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spelling 2023-12-01T11:34:27.8177830 v2 65173 2023-12-01 Laser-cooled Be+ for improved antihydrogen trapping and magnetometry d11388181f4f4559514f02e9212c6ca1 JOANNA PESZKA JOANNA PESZKA true false 2023-12-01 We have laser-cooled beryllium ions in a Penning-Malmberg trap dedicated for antihydrogen formation. This trap is combined with a magnetic minimum trap to confine antihydrogen. This can be used to assist in the studies of antihydrogen in two distinct ways. The first application of the cold 9Be+ is to sympathetically cool positrons, which are used for antihydrogen formation. With this assistance we expect to produce colder antihydrogen and ultimately enhance the trapping rates of antihydrogen inside a magnetic trap by at least an order of magnitude. This would greatly improve measurements of antihydrogen properties allowing for increased precision. Cold Be+ could also be used for in-situ measurements of magnetic fields in our antihydrogen traps. The method proposed in this work is to measure an electron spin-flip transition frequency in the ground state of Be+, which is highly sensitive to the external magnetic field strength. The electron spin-flip transition could be induced by microwave radiation and detected via fluorescence from laser-cooling transition. Magnetometry plays a crucial role in trapped antihydrogen research, especially for antimatter gravity measurement performed at high magnetic fields. Also, with increasing precision of the antihydrogen spectroscopy measurements, the uncertainty of the magnetic field will increase the contribution to the systematic errors. Additionally, the benefit of using electron spinflip in Be+ is that it could be used to characterise the strength of the microwaves inside the ALPHA-2 trap. In this work, the feasibility of magnetometry using 9Be+ inside the ALPHA’s Penning trap was studied. The microwave induced electron spin-flip in Be+ was observed for the first time within the ALPHA apparatus. The uncertainty of the external magnetic field derived from this proof-of-principle measurement was comparable to the currently used Electron Cyclotron Resonance method and there are prospects for significant improvement. The laser-cooling procedure was improved, which should allow further study with sympathetic cooling of positrons and application of this technique to antihydrogen production sequence. E-Thesis Swansea, Wales, UK Laser cooling, beryllium ion, Be+, sympathetic cooling, antimatter, positron, antiproton, antihydrogen, CPT symmetry, weak equivalence principle, fundamental physics test, precision physics, low energy plasma, non-neutral plasma, charged particles trapping, ions trapping, Penning-Malmberg trap, magnetic bottle trap, Ioffe-Pritchard trap, atomic physics, laser physics, laser spectroscopy, UV lasers, UV fibres, laser ablation, electron spin-flip, magnetometry, Rabi method 7 11 2023 2023-11-07 10.23889/SUthesis.65173 COLLEGE NANME COLLEGE CODE Swansea University Madsen, Niels. Doctoral Ph.D Engineering and Physical Sciences Research Council (EPSRC) Engineering and Physical Sciences Research Council (EPSRC) (grant number: 2224433) 2023-12-01T11:34:27.8177830 2023-12-01T11:22:41.5626996 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics JOANNA PESZKA 1 65173__29163__b79cb6682981434dbf72e1e8d1678e4c.pdf 2023_Peszka_J.final.65173.pdf 2023-12-01T11:28:04.1870626 Output 109534684 application/pdf E-Thesis – open access true © Joanna Peszka, 2023. Distributed under the terms of a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). true eng https://creativecommons.org/licenses/by-nc-nd/4.0/
title Laser-cooled Be+ for improved antihydrogen trapping and magnetometry
spellingShingle Laser-cooled Be+ for improved antihydrogen trapping and magnetometry
JOANNA PESZKA
title_short Laser-cooled Be+ for improved antihydrogen trapping and magnetometry
title_full Laser-cooled Be+ for improved antihydrogen trapping and magnetometry
title_fullStr Laser-cooled Be+ for improved antihydrogen trapping and magnetometry
title_full_unstemmed Laser-cooled Be+ for improved antihydrogen trapping and magnetometry
title_sort Laser-cooled Be+ for improved antihydrogen trapping and magnetometry
author_id_str_mv d11388181f4f4559514f02e9212c6ca1
author_id_fullname_str_mv d11388181f4f4559514f02e9212c6ca1_***_JOANNA PESZKA
author JOANNA PESZKA
author2 JOANNA PESZKA
format E-Thesis
publishDate 2023
institution Swansea University
doi_str_mv 10.23889/SUthesis.65173
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 1
active_str 0
description We have laser-cooled beryllium ions in a Penning-Malmberg trap dedicated for antihydrogen formation. This trap is combined with a magnetic minimum trap to confine antihydrogen. This can be used to assist in the studies of antihydrogen in two distinct ways. The first application of the cold 9Be+ is to sympathetically cool positrons, which are used for antihydrogen formation. With this assistance we expect to produce colder antihydrogen and ultimately enhance the trapping rates of antihydrogen inside a magnetic trap by at least an order of magnitude. This would greatly improve measurements of antihydrogen properties allowing for increased precision. Cold Be+ could also be used for in-situ measurements of magnetic fields in our antihydrogen traps. The method proposed in this work is to measure an electron spin-flip transition frequency in the ground state of Be+, which is highly sensitive to the external magnetic field strength. The electron spin-flip transition could be induced by microwave radiation and detected via fluorescence from laser-cooling transition. Magnetometry plays a crucial role in trapped antihydrogen research, especially for antimatter gravity measurement performed at high magnetic fields. Also, with increasing precision of the antihydrogen spectroscopy measurements, the uncertainty of the magnetic field will increase the contribution to the systematic errors. Additionally, the benefit of using electron spinflip in Be+ is that it could be used to characterise the strength of the microwaves inside the ALPHA-2 trap. In this work, the feasibility of magnetometry using 9Be+ inside the ALPHA’s Penning trap was studied. The microwave induced electron spin-flip in Be+ was observed for the first time within the ALPHA apparatus. The uncertainty of the external magnetic field derived from this proof-of-principle measurement was comparable to the currently used Electron Cyclotron Resonance method and there are prospects for significant improvement. The laser-cooling procedure was improved, which should allow further study with sympathetic cooling of positrons and application of this technique to antihydrogen production sequence.
published_date 2023-11-07T05:17:12Z
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score 11.095862

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