Hyperfine Interactions

, Volume 212, Issue 1–3, pp 31–40 | Cite as

Antihydrogen atom formation in a CUSP trap towards spin polarized beams

  • N. Kuroda
  • Y. Enomoto
  • K. Michishio
  • C. H. Kim
  • H. Higaki
  • Y. Nagata
  • Y. Kanai
  • H. A. Torii
  • M. Corradini
  • M. Leali
  • E. Lodi-Rizzini
  • L. Venturelli
  • N. Zurlo
  • K. Fujii
  • M. Ohtsuka
  • K. Tanaka
  • H. Imao
  • Y. Nagashima
  • Y. Matsuda
  • B. Juhász
  • E. Widmann
  • A. Mohri
  • Y. Yamazaki
Article

Abstract

The 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. For this purpose, an efficient extraction of a spin polarized antihydrogen beam is essential. In 2010, we have succeeded in synthesizing our first cold antihydrogen atoms employing a CUSP trap. The CUSP trap confines antiprotons and positrons simultaneously with its axially symmetric magnetic field to form antihydrogen atoms. It is expected that 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 defocused, resulting in the formation of a spin-polarized antihydrogen beam.

Keywords

Antihydrogen CPT invariance Atomic beam Rydberg atom 

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • N. Kuroda
    • 1
  • Y. Enomoto
    • 2
  • K. Michishio
    • 4
  • C. H. Kim
    • 1
  • H. Higaki
    • 5
  • Y. Nagata
    • 2
  • Y. Kanai
    • 2
  • H. A. Torii
    • 1
  • M. Corradini
    • 6
  • M. Leali
    • 6
  • E. Lodi-Rizzini
    • 6
  • L. Venturelli
    • 6
  • N. Zurlo
    • 6
  • K. Fujii
    • 1
  • M. Ohtsuka
    • 1
  • K. Tanaka
    • 1
  • H. Imao
    • 3
  • Y. Nagashima
    • 4
  • Y. Matsuda
    • 1
  • B. Juhász
    • 7
  • E. Widmann
    • 7
  • A. Mohri
    • 2
  • Y. Yamazaki
    • 2
  1. 1.Graduate School of Arts and SciencesUniversity of TokyoTokyoJapan
  2. 2.RIKEN Advanced Science InstituteSaitamaJapan
  3. 3.RIKEN Nishina Center for Accelerator-Based ScienceSaitamaJapan
  4. 4.Department of PhysicsTokyo University of ScienceTokyoJapan
  5. 5.Graduate School of Advanced Science of MatterHiroshima UniversityHiroshimaJapan
  6. 6.Dipartimento di Chimica e Fisica per l’Ingegneria e per i MaterialiUniversità di Brescia & Instituto Nazionale di Fisica NucleareBresciaItaly
  7. 7.Stefan Meyer Institut für Subatomare PhysikWienAustria

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