@article {33041,
	title = {Antihydrogen accumulation for fundamental symmetry tests},
	journal = {Nature Communications},
	volume = {8},
	year = {2017},
	pages = {681},
	abstract = {<p>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 $\pm$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.</p>},
	isbn = {2041-1723},
	doi = {10.1038/s41467-017-00760-9},
	url = {https://doi.org/10.1038/s41467-017-00760-9},
	author = {Ahmadi, M. and Alves, B. X. R. and Baker, C. J. and Bertsche, W. and Butler, E. and Capra, A. and Carruth, C. and Cesar, C. L. and Charlton, M. and Cohen, S. and Collister, R. and Eriksson, S. and Evans, A. and Evetts, N. and Fajans, J. and Friesen, T. and Fujiwara, M. C. and Gill, D. R. and Gutierrez, A. and Hangst, J. S. and Hardy, W. N. and Hayden, M. E. and Isaac, C. A. and Ishida, A. and Johnson, M. A. and Jones, S. A. and Jonsell, S. and Kurchaninov, L. and Madsen, N. and Mathers, M. and Maxwell, D. and McKenna, J. T. K. and Menary, S. and Michan, J. M. and Momose, T. and Munich, J. J. and Nolan, P. and Olchanski, K. and Olin, A. and Pusa, P. and Rasmussen, C. {\O}. and Robicheaux, F. and Sacramento, R. L. and Sameed, M. and Sarid, E. and Silveira, D. M. and Stracka, S. and Stutter, G. and So, C. and Tharp, T. D. and Thompson, J. E. and Thompson, R. I. and van der Werf, D. P. and Wurtele, J. S.}
}
