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Barker DS, Norrgard EB, Scherschligt J, Fedchak JA, Eckel S. Light-induced atomic desorption of lithium. PHYSICAL REVIEW. A 2018; 98:043412. [PMID: 30984896 PMCID: PMC6460927 DOI: 10.1103/physreva.98.043412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We demonstrate loading of a Li magneto-optical trap using light-induced atomic desorption. The magnetooptical trap confines up to approximately 4 × 104 7Li atoms with loading rates up to approximately 4 × 103 atoms per second. We study the Li desorption rate as a function of the desorption wavelength and power. The extracted wavelength threshold for desorption of Li from fused silica is approximately 470 nm. In addition to desorption of lithium, we observe light-induced desorption of background gas molecules. The vacuum pressure increase due to the desorbed background molecules is ≲ 50 % and the vacuum pressure decreases back to its base value with characteristic timescales on the order of seconds when we extinguish the desorption light. By examining both the loading and decay curves of the magneto-optical trap, we are able to disentangle the trap decay rates due to background gases and desorbed lithium. Our results show that light-induced atomic desorption can be a viable Li vapor source for compact devices and sensors.
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Affiliation(s)
- D S Barker
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - E B Norrgard
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - J Scherschligt
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - J A Fedchak
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - S Eckel
- Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
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Agustsson S, Bianchi G, Calabrese R, Corradi L, Dainelli A, Khanbekyan A, Marinelli C, Mariotti E, Marmugi L, Ricci L, Stiaccini L, Tomassetti L, Vanella A. Enhanced Atomic Desorption of 209 and 210 Francium from Organic Coating. Sci Rep 2017. [PMID: 28646176 PMCID: PMC5482838 DOI: 10.1038/s41598-017-04397-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Controlled atomic desorption from organic Poly-DiMethylSiloxane coating is demonstrated for improving the loading efficiency of 209,210Fr magneto-optical traps. A three times increase in the cold atoms population is obtained with contact-less pulsed light-induced desorption, applied to different isotopes, either bosonic or fermionic, of Francium. A six times increase of 210Fr population is obtained with a desorption mechanism based on direct charge transfer from a triboelectric probe to the adatom-organic coating complex. Our findings provide new insight on the microscopic mechanisms of atomic desorption from organic coatings. Our results, obtained at room temperature so as to preserve ideal vacuum conditions, represent concrete alternatives, independent from the atomic species in use, for high-efficiency laser cooling in critical conditions.
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Affiliation(s)
- Steinn Agustsson
- DSFTA, University of Siena and INFN - PI, via Roma 56, 53100, Siena, Italy
| | - Giovanni Bianchi
- DSFTA, University of Siena and INFN - PI, via Roma 56, 53100, Siena, Italy
| | - Roberto Calabrese
- Department of Physics and Earth Sciences, University of Ferrara and INFN, via Saragat 1, 44122, Ferrara, Italy
| | - Lorenzo Corradi
- INFN - Laboratori Nazionali di Legnaro, viale dell'Universit `a 2, 35020, Legnaro (PD), Italy
| | - Antonio Dainelli
- INFN - Laboratori Nazionali di Legnaro, viale dell'Universit `a 2, 35020, Legnaro (PD), Italy
| | - Alen Khanbekyan
- DSFTA, University of Siena and INFN - PI, via Roma 56, 53100, Siena, Italy.,Department of Physics and Earth Sciences, University of Ferrara and INFN, via Saragat 1, 44122, Ferrara, Italy
| | - Carmela Marinelli
- DSFTA, University of Siena and INFN - PI, via Roma 56, 53100, Siena, Italy
| | - Emilio Mariotti
- DSFTA, University of Siena and INFN - PI, via Roma 56, 53100, Siena, Italy.
| | - Luca Marmugi
- Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
| | - Leonardo Ricci
- Physics Department, University of Trento, via Sommarive 14, 38123, Trento, Italy
| | - Leonardo Stiaccini
- DSFTA, University of Siena and INFN - PI, via Roma 56, 53100, Siena, Italy
| | - Luca Tomassetti
- Department of Mathematics and Computer Science, University of Ferrara and INFN, via Saragat 1, 44122, Ferrara, Italy
| | - Andrea Vanella
- DSFTA, University of Siena and INFN - PI, via Roma 56, 53100, Siena, Italy
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