G B Andresen et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 011001 doi:10.1088/0953-4075/41/1/011001
G B Andresen1, W Bertsche2,12, A Boston3, P D Bowe1, C L Cesar4, S Chapman2, M Charlton5, M Chartier3, A Deutsch2,13, J Fajans2, M C Fujiwara6, R Funakoshi7, D R Gill6, K Gomberoff2,13,14, J S Hangst1, R S Hayano7, R Hydomako8, M J Jenkins5, L V Jørgensen5, L Kurchaninov6, N Madsen5, P Nolan3, K Olchanski6, A Olin6, R D Page3, A Povilus2, F Robicheaux9, E Sarid10, D M Silveira4, J W Storey6, R I Thompson8, D P van der Werf5, J S Wurtele2 and Y Yamazaki11
Show affiliationsWe 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.
52.27.Ep Electron-positron plasmas
52.20.Hv Atomic, molecular, ion, and heavy-particle collisions
Issue 1 (14 January 2008)
Received 6 October 2007, in final form 9 October 2007
Published 19 December 2007
G B Andresen et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 011001
Teruaki Inagaki and Hiroshi Suzuki JHEP07(2004)038
Aiyalam P. Balachandran et al JHEP11(2004)068
G Ratel et al 2006 Metrologia 43 06004
Luca Maccione et al JCAP10(2007)013
Julian Hauss et al 2008 New J. Phys. 10 095018
L Vyskocil et al 2008 Metrologia 45 08014
Y Aregbe and P Taylor 2003 Metrologia 40 08002
M P Seah 2008 Metrologia 45 08013
Jonathan Rocher and Mairi Sakellariadou JCAP03(2005)004