Hyperfine Interactions

, 199:39 | Cite as

Towards antihydrogen trapping and spectroscopy at ALPHA

  • E. Butler
  • G. B. Andresen
  • M. D. Ashkezari
  • M. Baquero-Ruiz
  • W. Bertsche
  • P. D. Bowe
  • C. C. Bray
  • C. L. Cesar
  • S. Chapman
  • M. Charlton
  • J. Fajans
  • T. Friesen
  • M. C. Fujiwara
  • D. R. Gill
  • J. S. Hangst
  • W. N. Hardy
  • R. S. Hayano
  • M. E. Hayden
  • A. J. Humphries
  • R. Hydomako
  • S. Jonsell
  • L. Kurchaninov
  • R. Lambo
  • N. Madsen
  • S. Menary
  • P. Nolan
  • K. Olchanski
  • A. Olin
  • A. Povilus
  • P. Pusa
  • F. Robicheaux
  • E. Sarid
  • D. M. Silveira
  • C. So
  • J. W. Storey
  • R. I. Thompson
  • D. P. van der Werf
  • D. Wilding
  • J. S. Wurtele
  • Y. Yamazaki
  • ALPHA Collaboration
Article

Abstract

Spectroscopy of antihydrogen has the potential to yield high-precision tests of the CPT theorem and shed light on the matter-antimatter imbalance in the Universe. The ALPHA antihydrogen trap at CERN’s Antiproton Decelerator aims to prepare a sample of antihydrogen atoms confined in an octupole-based Ioffe trap and to measure the frequency of several atomic transitions. We describe our techniques to directly measure the antiproton temperature and a new technique to cool them to below 10 K. We also show how our unique position-sensitive annihilation detector provides us with a highly sensitive method of identifying antiproton annihilations and effectively rejecting the cosmic-ray background.

Keywords

Antihydrogen Antimatter CPT Penning trap Atom trap 

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • E. Butler
    • 1
  • G. B. Andresen
    • 2
  • M. D. Ashkezari
    • 3
  • M. Baquero-Ruiz
    • 4
  • W. Bertsche
    • 1
  • P. D. Bowe
    • 2
  • C. C. Bray
    • 4
  • C. L. Cesar
    • 5
  • S. Chapman
    • 4
  • M. Charlton
    • 1
  • J. Fajans
    • 4
  • T. Friesen
    • 6
  • M. C. Fujiwara
    • 6
    • 7
  • D. R. Gill
    • 7
  • J. S. Hangst
    • 2
  • W. N. Hardy
    • 8
  • R. S. Hayano
    • 9
  • M. E. Hayden
    • 3
  • A. J. Humphries
    • 1
  • R. Hydomako
    • 6
  • S. Jonsell
    • 10
  • L. Kurchaninov
    • 7
  • R. Lambo
    • 5
  • N. Madsen
    • 1
  • S. Menary
    • 11
  • P. Nolan
    • 12
  • K. Olchanski
    • 7
  • A. Olin
    • 7
  • A. Povilus
    • 4
  • P. Pusa
    • 12
  • F. Robicheaux
    • 13
  • E. Sarid
    • 14
  • D. M. Silveira
    • 15
    • 16
  • C. So
    • 4
  • J. W. Storey
    • 7
  • R. I. Thompson
    • 6
  • D. P. van der Werf
    • 1
  • D. Wilding
    • 1
  • J. S. Wurtele
    • 4
  • Y. Yamazaki
    • 15
    • 16
  • ALPHA Collaboration
  1. 1.Department of PhysicsSwansea UniversitySwanseaUK
  2. 2.Department of Physics and AstronomyAarhus UniversityAarhus CDenmark
  3. 3.Department of PhysicsSimon Fraser UniversityBurnaby BCCanada
  4. 4.Department of PhysicsUniversity of CaliforniaBerkeleyUSA
  5. 5.Instituto de FísicaUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil
  6. 6.Department of Physics and AstronomyUniversity of CalgaryCalgary ABCanada
  7. 7.TRIUMFVancouverCanada
  8. 8.Department of Physics and AstronomyUniversity of British ColumbiaVancouverCanada
  9. 9.Department of PhysicsUniversity of TokyoTokyoJapan
  10. 10.FysikumStockholm UniversityStockholmSweden
  11. 11.Department of Physics and AstronomyYork UniversityTorontoCanada
  12. 12.Department of PhysicsUniversity of LiverpoolLiverpoolUK
  13. 13.Department of PhysicsAuburn UniversityAuburnUSA
  14. 14.Department of PhysicsNRCN-Nuclear Research Center NegevBeer ShevaIsrael
  15. 15.Atomic Physics LaboratoryRIKEN Advanced Science InstituteSaitamaJapan
  16. 16.Graduate School of Arts and SciencesUniversity of TokyoTokyoJapan

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