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An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion

Steven Jones

New Journal of Physics, Volume: 24, Issue: 2, Start page: 023016

Swansea University Author: Steven Jones

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Abstract

I present a novel scheme for producing cold (magnetically trappable) atomic hydrogen, based on threshold photodissociation of the BaH+ molecular ion. BaH+ can be sympathetically cooled using laser cooled Ba+ in an ion trap, before it is photodissociated on the single photon A1Σ+ ← X1Σ+ transition. T...

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Published in: New Journal of Physics
ISSN: 1367-2630
Published: IOP Publishing 2022
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URI: https://cronfa.swan.ac.uk/Record/cronfa60733
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first_indexed 2022-08-04T15:35:28Z
last_indexed 2023-01-13T19:21:05Z
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spelling 2022-08-26T10:35:51.1889554 v2 60733 2022-08-04 An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion 9708d801e2b5deef9428227bd2bfcbb1 Steven Jones Steven Jones true false 2022-08-04 SPH I present a novel scheme for producing cold (magnetically trappable) atomic hydrogen, based on threshold photodissociation of the BaH+ molecular ion. BaH+ can be sympathetically cooled using laser cooled Ba+ in an ion trap, before it is photodissociated on the single photon A1Σ+ ← X1Σ+ transition. The small mass ratio between Ba+ and BaH+ ensures a strong overlap within the ion trap for sympathetic cooling, while the large mass ratio between BaH+ and H means that the released hydrogen can be up to 139 times colder than the parent molecular ions. I examine the hydrogen production rate, and describe how the trap dynamics and photodissociation laser detuning influence the achievable energies. The low infrastructure costs and the ion trap nature of the scheme make it suitable for loading hydrogen into an antihydrogen experiment. This would support a direct matter–antimatter comparison, which could provide important clues as to why our Universe contains so little antimatter. Journal Article New Journal of Physics 24 2 023016 IOP Publishing 1367-2630 16 2 2022 2022-02-16 10.1088/1367-2630/ac4ef3 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University Other This work was supported by the EPSRC. 2022-08-26T10:35:51.1889554 2022-08-04T16:31:44.2834726 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Steven Jones 1 60733__24849__422517d7ed7e42de8f0a1caa342ff8d3.pdf 60733.VOR.pdf 2022-08-04T16:36:33.8364315 Output 2157985 application/pdf Version of Record true Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence true eng https://creativecommons.org/licenses/by/4.0/
title An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion
spellingShingle An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion
Steven Jones
title_short An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion
title_full An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion
title_fullStr An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion
title_full_unstemmed An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion
title_sort An ion trap source of cold atomic hydrogen via photodissociation of the BaH<sup>+</sup> molecular ion
author_id_str_mv 9708d801e2b5deef9428227bd2bfcbb1
author_id_fullname_str_mv 9708d801e2b5deef9428227bd2bfcbb1_***_Steven Jones
author Steven Jones
author2 Steven Jones
format Journal article
container_title New Journal of Physics
container_volume 24
container_issue 2
container_start_page 023016
publishDate 2022
institution Swansea University
issn 1367-2630
doi_str_mv 10.1088/1367-2630/ac4ef3
publisher IOP Publishing
college_str Faculty of Science and Engineering
hierarchytype
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 I present a novel scheme for producing cold (magnetically trappable) atomic hydrogen, based on threshold photodissociation of the BaH+ molecular ion. BaH+ can be sympathetically cooled using laser cooled Ba+ in an ion trap, before it is photodissociated on the single photon A1Σ+ ← X1Σ+ transition. The small mass ratio between Ba+ and BaH+ ensures a strong overlap within the ion trap for sympathetic cooling, while the large mass ratio between BaH+ and H means that the released hydrogen can be up to 139 times colder than the parent molecular ions. I examine the hydrogen production rate, and describe how the trap dynamics and photodissociation laser detuning influence the achievable energies. The low infrastructure costs and the ion trap nature of the scheme make it suitable for loading hydrogen into an antihydrogen experiment. This would support a direct matter–antimatter comparison, which could provide important clues as to why our Universe contains so little antimatter.
published_date 2022-02-16T04:19:05Z
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score 10.99342