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Sympathetic cooling of positrons to cryogenic temperatures for antihydrogen production

Christopher Baker Orcid Logo, W. Bertsche, A. Capra, C. L. Cesar, Michael Charlton, April Cridland Orcid Logo, Stefan Eriksson, A. Evans, N. Evetts, S. Fabbri, J. Fajans, T. Friesen, M. C. Fujiwara, P. Grandemange, P. Granum, J. S. Hangst, M. E. Hayden, D. Hodgkinson, Aled Isaac Orcid Logo, M. A. Johnson, Jack Jones, S. A. Jones, S. Jonsell, L. Kurchaninov, Niels Madsen Orcid Logo, Daniel Maxwell Orcid Logo, J. T. K. McKenna, S. Menary, T. Momose, Patrick Mullan, K. Olchanski, A. Olin, J. Peszka, A. Powell, P. Pusa, C. Ø. Rasmussen, F. Robicheaux, R. L. Sacramento, M. Sameed, E. Sarid, D. M. Silveira, G. Stutter, C. So, T. D. Tharp, R. I. Thompson, Dirk van der Werf Orcid Logo, J. S. Wurtele

Nature Communications, Volume: 12, Issue: 1

Swansea University Authors: Christopher Baker Orcid Logo, Michael Charlton, April Cridland Orcid Logo, Stefan Eriksson, Aled Isaac Orcid Logo, Jack Jones, Niels Madsen Orcid Logo, Daniel Maxwell Orcid Logo, Patrick Mullan, Dirk van der Werf Orcid Logo

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Abstract

The positron, the antiparticle of the electron, predicted by Dirac in 1931 and discovered by Anderson in 1933, plays a key role in many scientific and everyday endeavours. Notably, the positron is a constituent of antihydrogen, the only long-lived neutral antimatter bound state that can currently be...

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Published in: Nature Communications
ISSN: 2041-1723
Published: Springer Science and Business Media LLC 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa58657
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Abstract: The positron, the antiparticle of the electron, predicted by Dirac in 1931 and discovered by Anderson in 1933, plays a key role in many scientific and everyday endeavours. Notably, the positron is a constituent of antihydrogen, the only long-lived neutral antimatter bound state that can currently be synthesized at low energy, presenting a prominent system for testing fundamental symmetries with high precision. Here, we report on the use of laser cooled Be+ ions to sympathetically cool a large and dense plasma of positrons to directly measured temperatures below 7 K in a Penning trap for antihydrogen synthesis. This will likely herald a significant increase in the amount of antihydrogen available for experimentation, thus facilitating further improvements in studies of fundamental symmetries.
College: College of Science
Funders: This work was supported by: CNPq, FAPERJ, RENAFAE (Brazil); NSERC, NRC/TRIUMF, EHPDS/EHDRS, FQRNT (Canada); FNU (NICE Centre), Carlsberg Foundation (Denmark); ISF (Israel); STFC, EPSRC (UK); DOE, NSF (USA); and VR (Sweden).
Issue: 1