Antihydrogen accumulation for fundamental symmetry tests
| dc.contributor.author | Ahmadi, M. | |
| dc.contributor.author | Olin, Art | |
| dc.contributor.author | et al. | |
| dc.date.accessioned | 2020-03-27T21:35:05Z | |
| dc.date.available | 2020-03-27T21:35:05Z | |
| dc.date.copyright | 2017 | en_US |
| dc.date.issued | 2017 | |
| dc.description.abstract | Article Open Access Published: 25 September 2017 Antihydrogen accumulation for fundamental symmetry tests M. Ahmadi, B. X. R. Alves, […]J. S. Wurtele Nature Communications volume 8, Article number: 681 (2017) Cite this article 863 Accesses 22 Citations 23 Altmetric Metricsdetails Abstract 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. | en_US |
| dc.description.reviewstatus | Reviewed | en_US |
| dc.description.scholarlevel | Faculty | en_US |
| dc.description.sponsorship | This work was supported by the European Research Council through its Advanced Grant programme (J.S.H.); CNPq, FAPERJ, RENAFAE (Brazil); NSERC, NRC/TRIUMF, EHPDS/EHDRS, FQRNT (Canada); FNU (NICE Centre), Carlsberg Foundation (Denmark); JSPS Postdoctoral Fellowships for Research Abroad (Japan); ISF (Israel); STFC, EPSRC, the Royal Society and the Leverhulme Trust (UK); DOE, NSF (USA); and VR (Sweden). We are grateful for the efforts of the CERN AD team, without which these experiments could not have taken place. We thank Jacky Tonoli (CERN) and his staff for extensive, time-critical help with machining work. We thank the staff of the Superconducting Magnet Division at Brookhaven National Laboratory for collaboration and fabrication of the trapping magnets. We thank C. Marshall (TRIUMF) for his work on the ALPHA-2 cryostat. We thank Professor F. Besenbacher (Aarhus) for timely support in procuring the ALPHA-2 external solenoid. This experiment was based on data collected using the ALPHA-2 antihydrogen trapping apparatus. The ALPHA-2 apparatus was designed and constructed by the ALPHA Collaboration using methods developed by the entire collaboration. All authors contributed to this work as members of the ALPHA antihydrogen collaboration. | en_US |
| dc.identifier.citation | Ahmadi, M.; Alves, B. X. R.; Baker, C. J.; Bertsche, W.; Butler, E.; Capra, A.; … & Wurtele, J. S. (2017). Antihydrogen accumulation for fundamental symmetry tests. Nature Communications, 8, article 681. DOI: 10.1038/s41467-017-00760-9 | en_US |
| dc.identifier.uri | https://doi.org/10.1038/s41467-017-00760-9 | |
| dc.identifier.uri | http://hdl.handle.net/1828/11654 | |
| dc.language.iso | en | en_US |
| dc.publisher | Nature Communications | en_US |
| dc.subject | Exotic atoms and molecules | |
| dc.subject | Experimental particle physics | |
| dc.subject.department | Department of Physics and Astronomy | |
| dc.title | Antihydrogen accumulation for fundamental symmetry tests | en_US |
| dc.type | Article | en_US |