Antihydrogen accumulation for fundamental symmetry tests

Ahmadi, M, Alves, BXR, Baker, CJ, Bertsche, W, Butler, E, Capra, A, Carruth, C, Cesar, CL, Charlton, M, Cohen, S
et al (show 44 more authors) (2017) Antihydrogen accumulation for fundamental symmetry tests. NATURE COMMUNICATIONS, 8 (1). 681-.

This is the latest version of this item.

[thumbnail of Antihydrogen accumulation for fundamental symmetry tests.pdf] Text
Antihydrogen accumulation for fundamental symmetry tests.pdf - Published version

Download (720kB)
[thumbnail of Article4.pdf] Text
Article4.pdf - Published version

Download (2MB)


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.

Item Type: Article
Uncontrolled Keywords: Exotic atoms and molecules, Experimental particle physics
Depositing User: Symplectic Admin
Date Deposited: 20 Mar 2019 12:05
Last Modified: 19 Jan 2023 00:56
DOI: 10.1038/s41467-017-00760-9
Related URLs:

Available Versions of this Item