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Antihydrogen accumulation for fundamental symmetry tests
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Number of Authors: 54
2017 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, 681Article in journal (Refereed) Published
Abstract [en]

Antihydrogen, a positron bound to an antiproton, is the simplest anti-atom. Its structure and properties are expected to mirror those of the hydrogen atom. Prospects for precision comparisons of the two, as tests of fundamental symmetries, are driving a vibrant programme of research. In this regard, a limiting factor in most experiments is the availability of large numbers of cold ground state antihydrogen atoms. Here, we describe how an improved synthesis process results in a maximum rate of 10.5 +/- 0.6 atoms trapped and detected per cycle, corresponding to more than an order of magnitude improvement over previous work. Additionally, we demonstrate how detailed control of electron, positron and antiproton plasmas enables repeated formation and trapping of antihydrogen atoms, with the simultaneous retention of atoms produced in previous cycles. We report a record of 54 detected annihilation events from a single release of the trapped anti-atoms accumulated from five consecutive cycles.

Place, publisher, year, edition, pages
2017. Vol. 8, 681
Keyword [en]
Exotic atoms and molecules, Experimental particle physics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-148080DOI: 10.1038/s41467-017-00760-9ISI: 000411646700003PubMedID: 28947794OAI: oai:DiVA.org:su-148080DiVA: diva2:1152356
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2017-11-29Bibliographically approved

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