2007/12/20 by G B Andresen, Gorm Bruun Andresen, W Bertsche +65 · 2 citations
Engineering · Physics and Astronomy · #Atomic and Molecular Physics #Muon and positron interactions and applications #Particle accelerators and beam dynamics #nucl-ex
paper · pdf · doi:10.1088/0953-4075/41/1/011001
published as J.Phys.B41:011001,2008
openalex publication_date 2007/12/20 · arxiv created 2008/07/01 · arxiv updated 2009/12/01 · openalex created_date 2020/07/23 · openalex updated_date 2026/07/30
We have demonstrated production of antihydrogen in a 1 T solenoidal magnetic field. This field strength is significantly smaller than that used in the first generation experiments ATHENA (3 T) and ATRAP (5 T). The motivation for using a smaller magnetic field is to facilitate trapping of antihydrogen atoms in a neutral atom trap surrounding the production region. We report the results of measurements with the Antihydrogen Laser PHysics Apparatus (ALPHA) device, which can capture and cool antiprotons at 3 T, and then mix the antiprotons with positrons at 1 T. We infer antihydrogen production from the time structure of antiproton annihilations during mixing, using mixing with heated positrons as the null experiment, as demonstrated in ATHENA. Implications for antihydrogen trapping are discussed.