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

doi:10.1007/s10751-012-0646-z

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. JuhászE. Widmann, A. Mohri, Y. Yamazaki

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	31-40
Number of pages	10
Journal	Hyperfine Interactions
Volume	212
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-012-0646-z
Publication status	Published - 2012 Dec
Externally published	Yes

Keywords

Antihydrogen
Atomic beam
CPT invariance
Rydberg atom

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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Kuroda, N., Enomoto, Y., Michishio, K., Kim, C. H., Higaki, H., Nagata, Y., Kanai, Y., Torii, H. A., Corradini, M., Leali, M., Lodi-Rizzini, E., Venturelli, L., Zurlo, N., Fujii, K., Ohtsuka, M., Tanaka, K., Imao, H., Nagashima, Y., Matsuda, Y., ... Yamazaki, Y. (2012). Antihydrogen atom formation in a CUSP trap towards spin polarized beams. Hyperfine Interactions, 212(1-3), 31-40. https://doi.org/10.1007/s10751-012-0646-z

Kuroda, N, Enomoto, Y, Michishio, K, Kim, CH, Higaki, H, Nagata, Y, Kanai, Y, Torii, HA, Corradini, M, Leali, M, Lodi-Rizzini, E, Venturelli, L, Zurlo, N, Fujii, K, Ohtsuka, M, Tanaka, K, Imao, H, Nagashima, Y, Matsuda, Y, Juhász, B, Widmann, E, Mohri, A & Yamazaki, Y 2012, 'Antihydrogen atom formation in a CUSP trap towards spin polarized beams', Hyperfine Interactions, vol. 212, no. 1-3, pp. 31-40. https://doi.org/10.1007/s10751-012-0646-z

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title = "Antihydrogen atom formation in a CUSP trap towards spin polarized beams",

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, Atomic beam, CPT invariance, Rydberg atom",

author = "N. Kuroda and Y. Enomoto and K. Michishio and Kim, {C. H.} and H. Higaki and Y. Nagata and Y. Kanai and Torii, {H. A.} and M. Corradini and M. Leali and E. Lodi-Rizzini and L. Venturelli and N. Zurlo and K. Fujii and M. Ohtsuka and K. Tanaka and H. Imao and Y. Nagashima and Y. Matsuda and B. Juh{\'a}sz and E. Widmann and A. Mohri and Y. Yamazaki",

note = "Funding Information: Acknowledgements We would like to thank CERN, the AD staffs, ant the RF team for their efforts and supports. This work was supported by the Grant-in-Aid for Specially Promoted Research (19002004) of Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), Special Research Projects for Basic Science of RIKEN, Universit{\`a} di Brescia, and Instituto Nazionale di Fisica Nucleare.",

year = "2012",

month = dec,

doi = "10.1007/s10751-012-0646-z",

language = "English",

volume = "212",

pages = "31--40",

journal = "Hyperfine Interaction",

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AU - Kuroda, N.

AU - Enomoto, Y.

AU - Michishio, K.

AU - Kim, C. H.

AU - Higaki, H.

AU - Nagata, Y.

AU - Kanai, Y.

AU - Torii, H. A.

AU - Corradini, M.

AU - Leali, M.

AU - Lodi-Rizzini, E.

AU - Venturelli, L.

AU - Zurlo, N.

AU - Fujii, K.

AU - Ohtsuka, M.

AU - Tanaka, K.

AU - Imao, H.

AU - Nagashima, Y.

AU - Matsuda, Y.

AU - Juhász, B.

AU - Widmann, E.

AU - Mohri, A.

AU - Yamazaki, Y.

N1 - Funding Information: Acknowledgements We would like to thank CERN, the AD staffs, ant the RF team for their efforts and supports. This work was supported by the Grant-in-Aid for Specially Promoted Research (19002004) of Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT), Special Research Projects for Basic Science of RIKEN, Università di Brescia, and Instituto Nazionale di Fisica Nucleare.

PY - 2012/12

Y1 - 2012/12

N2 - 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.

AB - 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.

KW - Antihydrogen

KW - Atomic beam

KW - CPT invariance

KW - Rydberg atom

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Antihydrogen atom formation in a CUSP trap towards spin polarized beams

Abstract

Keywords

ASJC Scopus subject areas

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