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Laser stimulated deexcitation of Rydberg antihydrogen atoms
Antihydrogen atoms are routinely formed at CERN in a broad range of Rydberg states. Ground-state antiatoms, those useful for precision measurements, are eventually produced through spontaneous decay. However given the long lifetime of Rydberg states the number of ground-state antihydrogen atoms usab...
Autores principales: | , |
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Lenguaje: | eng |
Publicado: |
2018
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1103/PhysRevA.99.013418 https://dx.doi.org/10.1103/PhysRevA.101.019904 http://cds.cern.ch/record/2645301 |
_version_ | 1780960432710746112 |
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author | Comparat, Daniel Malbrunot, Chloé |
author_facet | Comparat, Daniel Malbrunot, Chloé |
author_sort | Comparat, Daniel |
collection | CERN |
description | Antihydrogen atoms are routinely formed at CERN in a broad range of Rydberg states. Ground-state antiatoms, those useful for precision measurements, are eventually produced through spontaneous decay. However given the long lifetime of Rydberg states the number of ground-state antihydrogen atoms usable is small, in particular for experiments relying on the production of a beam of antihydrogen atoms. Therefore, it is of high interest to efficiently stimulate the decay in order to retain a higher fraction of ground-state atoms for measurements. We propose a method that optimally mixes the high angular momentum states with low ones enabling us to stimulate, using a broadband frequency laser, the deexcitation toward low-lying states, which then spontaneously decay to the ground state. We evaluate the method in realistic antihydrogen experimental conditions. For instance, starting with an initial distribution of atoms within the n=20–30 manifolds, as formed through the charge exchange mechanism, we show that more than 80% of antihydrogen atoms will be deexcited to the ground state within 100 ns using a laser producing 2 J at 828 nm. |
id | cern-2645301 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2018 |
record_format | invenio |
spelling | cern-26453012022-08-10T12:25:06Zdoi:10.1103/PhysRevA.99.013418doi:10.1103/PhysRevA.101.019904http://cds.cern.ch/record/2645301engComparat, DanielMalbrunot, ChloéLaser stimulated deexcitation of Rydberg antihydrogen atomsphysics.atom-phOther Fields of PhysicsAntihydrogen atoms are routinely formed at CERN in a broad range of Rydberg states. Ground-state antiatoms, those useful for precision measurements, are eventually produced through spontaneous decay. However given the long lifetime of Rydberg states the number of ground-state antihydrogen atoms usable is small, in particular for experiments relying on the production of a beam of antihydrogen atoms. Therefore, it is of high interest to efficiently stimulate the decay in order to retain a higher fraction of ground-state atoms for measurements. We propose a method that optimally mixes the high angular momentum states with low ones enabling us to stimulate, using a broadband frequency laser, the deexcitation toward low-lying states, which then spontaneously decay to the ground state. We evaluate the method in realistic antihydrogen experimental conditions. For instance, starting with an initial distribution of atoms within the n=20–30 manifolds, as formed through the charge exchange mechanism, we show that more than 80% of antihydrogen atoms will be deexcited to the ground state within 100 ns using a laser producing 2 J at 828 nm.Antihydrogen atoms are routinely formed at CERN in a broad range of Rydberg states. Ground-state anti-atoms, those useful for precision measurements, are eventually produced through spontaneous decay. However given the long lifetime of Rydberg states the number of ground-state antihydrogen atoms usable is small, in particular for experiments relying on the production of a beam of antihydrogen atoms. Therefore, it is of high interest to efficiently stimulate the decay in order to retain a higher fraction of ground-state atoms for measurements. We propose a method that optimally mixes the high angular momentum states with low ones enabling to stimulate, using a broadband frequency laser, the deexcitation toward low-lying states, which then spontaneously decay to ground-state. We evaluated the method in realistic antihydrogen experimental conditions. For instance, starting with an initial distribution of atoms within the $n=20-30$ manifolds, as formed through charge exchange mechanism, we show that more than 80\% of antihydrogen atoms will be deexcited to the ground-state within 100 ns using a laser producing 2 J at 828 nm.arXiv:1810.06736oai:cds.cern.ch:26453012018-10-15 |
spellingShingle | physics.atom-ph Other Fields of Physics Comparat, Daniel Malbrunot, Chloé Laser stimulated deexcitation of Rydberg antihydrogen atoms |
title | Laser stimulated deexcitation of Rydberg antihydrogen atoms |
title_full | Laser stimulated deexcitation of Rydberg antihydrogen atoms |
title_fullStr | Laser stimulated deexcitation of Rydberg antihydrogen atoms |
title_full_unstemmed | Laser stimulated deexcitation of Rydberg antihydrogen atoms |
title_short | Laser stimulated deexcitation of Rydberg antihydrogen atoms |
title_sort | laser stimulated deexcitation of rydberg antihydrogen atoms |
topic | physics.atom-ph Other Fields of Physics |
url | https://dx.doi.org/10.1103/PhysRevA.99.013418 https://dx.doi.org/10.1103/PhysRevA.101.019904 http://cds.cern.ch/record/2645301 |
work_keys_str_mv | AT comparatdaniel laserstimulateddeexcitationofrydbergantihydrogenatoms AT malbrunotchloe laserstimulateddeexcitationofrydbergantihydrogenatoms |