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Antihydrogen Physics

M Charlton, D. P. van der Werf, Dirk van der Werf Orcid Logo

Proceedings of the International School of Physics "Enrico Fermi" Course CLXXIV "Physics with Many Positrons", Pages: 189 - 215

Swansea University Author: Dirk van der Werf Orcid Logo

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DOI (Published version): 10.3254/978-1-60750-646-1-189

Abstract

Sustained advances in the trapping of positrons and antiprotons led to the recent creation of cold antihydrogen in vacuum under controlled conditions. This was achieved at the unique Antiproton Decelerator facility located at CERN, Geneva. The collection, manipulation and mixing of clouds of the ant...

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Published in: Proceedings of the International School of Physics "Enrico Fermi" Course CLXXIV "Physics with Many Positrons"
Published: IOS 2010
URI: https://cronfa.swan.ac.uk/Record/cronfa8007
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spelling 2013-06-18T12:02:38.0693159 v2 8007 2012-02-22 Antihydrogen Physics 4a4149ebce588e432f310f4ab44dd82a 0000-0001-5436-5214 Dirk van der Werf Dirk van der Werf true false 2012-02-22 SPH Sustained advances in the trapping of positrons and antiprotons led to the recent creation of cold antihydrogen in vacuum under controlled conditions. This was achieved at the unique Antiproton Decelerator facility located at CERN, Geneva. The collection, manipulation and mixing of clouds of the antiparticles necessary to promote antihydrogen formation are described herein, including some of the more practical aspects of positron accumulation. This discussion is prefaced by a treatment of basic Penning trap and plasma physics of relevance to antihydrogen formation. The detection of the nascent antihydrogen atoms, both via their annihilation on Penning trap electrodes and following field ionization of weakly-bound pairs, is reviewed. We present a brief description of aspects of the physics output of the antihydrogen experiments in terms of the nature of the states which are formed and implications of measurements of the spatial distribution of antihydrogen annihilation events. Theoretical simulations of antihydrogen formation have been useful in providing guidance in interpreting experimental data, and aspects of this work are reviewed. Trapping of neutral systems using a magnetic field minimum device is described and the new ALPHA antihydrogen trapping experiment is introduced. We conclude with a look to the future of the new field of antihydrogen physics. Conference Paper/Proceeding/Abstract Proceedings of the International School of Physics "Enrico Fermi" Course CLXXIV "Physics with Many Positrons" 189 215 IOS 31 12 2010 2010-12-31 10.3254/978-1-60750-646-1-189 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2013-06-18T12:02:38.0693159 2012-02-22T13:37:04.0000000 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics M Charlton 1 D. P. van der Werf 2 Dirk van der Werf 0000-0001-5436-5214 3
title Antihydrogen Physics
spellingShingle Antihydrogen Physics
Dirk van der Werf
title_short Antihydrogen Physics
title_full Antihydrogen Physics
title_fullStr Antihydrogen Physics
title_full_unstemmed Antihydrogen Physics
title_sort Antihydrogen Physics
author_id_str_mv 4a4149ebce588e432f310f4ab44dd82a
author_id_fullname_str_mv 4a4149ebce588e432f310f4ab44dd82a_***_Dirk van der Werf
author Dirk van der Werf
author2 M Charlton
D. P. van der Werf
Dirk van der Werf
format Conference Paper/Proceeding/Abstract
container_title Proceedings of the International School of Physics "Enrico Fermi" Course CLXXIV "Physics with Many Positrons"
container_start_page 189
publishDate 2010
institution Swansea University
doi_str_mv 10.3254/978-1-60750-646-1-189
publisher IOS
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description Sustained advances in the trapping of positrons and antiprotons led to the recent creation of cold antihydrogen in vacuum under controlled conditions. This was achieved at the unique Antiproton Decelerator facility located at CERN, Geneva. The collection, manipulation and mixing of clouds of the antiparticles necessary to promote antihydrogen formation are described herein, including some of the more practical aspects of positron accumulation. This discussion is prefaced by a treatment of basic Penning trap and plasma physics of relevance to antihydrogen formation. The detection of the nascent antihydrogen atoms, both via their annihilation on Penning trap electrodes and following field ionization of weakly-bound pairs, is reviewed. We present a brief description of aspects of the physics output of the antihydrogen experiments in terms of the nature of the states which are formed and implications of measurements of the spatial distribution of antihydrogen annihilation events. Theoretical simulations of antihydrogen formation have been useful in providing guidance in interpreting experimental data, and aspects of this work are reviewed. Trapping of neutral systems using a magnetic field minimum device is described and the new ALPHA antihydrogen trapping experiment is introduced. We conclude with a look to the future of the new field of antihydrogen physics.
published_date 2010-12-31T03:10:02Z
_version_ 1763749923611738112
score 11.014067

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