%0 Journal Article %J Hyperfine Interactions %D 2012 %T Synthesis of antihydrogen atoms in a CUSP trap %A Kuroda, Naofumi %A Enomoto, Yoshinori %A Michishio, Koji %A Kim, Chanhyoun %A Higaki, Hiroyuki %A Nagata, Yugo %A Kanai, Yasuyuki %A Torii, Hiroyuki %A Corradini, Maurizzio %A Leali, Marco %A Lodi-Rizzini, Evandro %A Mascagna, Valerio %A Venturelli, Luca %A Zurlo, Nicola %A Fujii, Koki %A Ohtsuka, Miki %A Tanaka, Kazuo %A Imao, Hiroshi %A Nagashima, Yasuyuki %A Matsuda, Yasuyuki %A Juhász, Bertalan %A Widmann, Eberhard %A Mohri, Akihiro %A Yamazaki, Yasunori %X

ASACUSA collaboration has been making a path to realize high precision microwave spectroscopy of ground-state hyperfine transitions of antihydrogen atom in flight for stringent test of the CPT symmetry. Recently, we have succeeded in synthesizing our first cold antihydrogen atoms employing a CUSP trap. It is expected that synthesized antihydrogen atoms in the low-field-seeking states are preferentially focused along the cusp magnetic field axis whereas those in the high-field-seeking states are not focused, resulting in the formation of a spin-polarized antihydrogen beam. We report the recent results of antihydrogen atom synthesis and beam production developed with the CUSP trap.

%B Hyperfine Interactions %V 209 %P 35-41 %G eng %U http://dx.doi.org/10.1007/s10751-012-0560-4