Timothy Tharp, Marquette UniversityFollow
M. Ahmadi, University of Liverpool
P. Nolan, University of Liverpool
P. Pusa, University of Liverpool
B. X. R. Alves, Aarhus University
T. Friesen, Aarhus University
C. O. Rasmussen, Aarhus University
G. Stutter, Aarhus University
C. J. Baker, Swansea University
M. Charlton, Swansea University
S. Eriksson, Swansea University
C. A. Isaac, Swansea University
S. A. Jones, Swansea University
N. Madsen, Swansea University
D. Maxwell, Swansea University
M. Sameed, Swansea University
D. P. van der Werf, Swansea University, IRFU
W. Bertsche, University of Manchester, Cockcroft Institute
M. A. Johnson, Swansea University, University of Manchester
E. Butler, CERN
A. Capra, TRIUMF
R. Collister, TRIUMF
M. C. Fujiwara, TRIUMF
L. Kurchaninov, TRIUMF
J. T. K. McKenna, TRIUMF
J. M. Michan, TRIUMF
K. Olchanski, TRIUMF
A. Olin, TRIUMF, University of Victoria
C. Carruth, University of California - Berkeley
J. Fajans, University of California - Berkeley
J. S. Wurtele, University of California - Berkeley
C. L. Cesar, Universidade Federal do Rio de Janeiro
R. L. Sacramento, Universidade Federal do Rio de Janeiro
D. M. Silveira, Universidade Federal do Rio de Janeiro
S. Cohen, Ben-Gurion University of the Negev
A. Evans, University of Calgary
C. So, University of Calgary
R. I. Thompson, University of Calgary
N. Evetts, University of British Columbia
W. N. Hardy, University of British Columbia
T. Momose, University of British Columbia
A. Gutierrez, University College London
M. E. Hayden, Simon Fraser University
J. J. Munich, Simon Fraser University
A. Ishida, University of Tokyo
S. Jonsell, Stockholm University
M. Mathers, York University
S. Menary, York University
J. E. Thompson, York University
J.M. Michan, Federale de Lausanne
F. Robicheaux, Purdue University
E. Sarid, Soreq NRC
S. Stracha, Universita di Pisa and Sezione INFN di Pisa

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Nature Publishing Group (Macmillan Publishers Limited)

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Nature Communications

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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.


Published version. Nature Communications, Vol. 8, No. 681 (Sept. 25, 2017). DOI. © 2017 Nature Publishing Group (Macmillan Publishers Limited). Used with permission.

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