Synthesis of antihydrogen atoms in a CUSP trap

Naofumi Kuroda*, Yoshinori Enomoto, Koji Michishio, Chanhyoun Kim, Hiroyuki Higaki, Yugo Nagata, Yasuyuki Kanai, Hiroyuki A. Torii, Maurizzio Corradini, Marco Leali, Evandro Lodi-Rizzini, Valerio Mascagna, Luca Venturelli, Nicola Zurlo, Koki Fujii, Miki Ohtsuka, Kazuo Tanaka, Hiroshi Imao, Yasuyuki Nagashima, Yasuyuki MatsudaBertalan Juhász, Eberhard Widmann, Akihiro Mohri, Yasunori Yamazaki

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Pages (from-to)35-41
Number of pages7
JournalHyperfine Interactions
Issue number1-3
Publication statusPublished - 2012 May
Externally publishedYes


  • Antihydrogen
  • Atomic beam
  • CPT invariance
  • Hyperfine splitting

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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