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Evaporative cooling of antiprotons for the production of trappable antihydrogen

D. M Silveira, G. B Andresen, M. D Ashkezari, M Baquero-Ruiz, W Bertsche, P. D Bowe, E Butler, C. L Cesar, S Chapman, M Charlton, J Fajans, T Friesen, M. C Fujiwara, D. R Gill, J. S Hangst, W. N Hardy, M. E Hayden, R Hydomako, S Jonsell, L Kurchaninov, N Madsen, S Menary, P Nolan, K Olchanski, A Olin, A Povilus, P Pusa, F Robicheaux, E Sarid, C So, J. W Storey, R. I Thompson, D. P. van der Werf, J. S Wurtele, Dirk van der Werf Orcid Logo, Niels Madsen Orcid Logo

AIP Conference Proceedings, Volume: 1521, Pages: 165 - 174

Swansea University Authors: Dirk van der Werf Orcid Logo, Niels Madsen Orcid Logo

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DOI (Published version): 10.1063/1.4796072

Abstract

We describe the implementation of evaporative cooling of charged particles in the ALPHA apparatus. Forced evaporation has been applied to cold samples of antiprotons held in Malmberg-Penning traps. Temperatures on the order of 10 K were obtained, while retaining a significant fraction of the initial...

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Published in: AIP Conference Proceedings
ISSN: 0094-243X
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa14622
first_indexed 2013-07-23T12:12:32Z
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spelling 2013-06-18T09:39:31.2737917 v2 14622 2013-04-22 Evaporative cooling of antiprotons for the production of trappable antihydrogen 4a4149ebce588e432f310f4ab44dd82a 0000-0001-5436-5214 Dirk van der Werf Dirk van der Werf true false e348e4d768ee19c1d0c68ce3a66d6303 0000-0002-7372-0784 Niels Madsen Niels Madsen true false 2013-04-22 BGPS We describe the implementation of evaporative cooling of charged particles in the ALPHA apparatus. Forced evaporation has been applied to cold samples of antiprotons held in Malmberg-Penning traps. Temperatures on the order of 10 K were obtained, while retaining a significant fraction of the initial number of particles. We have developed a model for the evaporation process based on simple rate equations and applied it succesfully to the experimental data. We have also observed radial re-distribution of the clouds following evaporation, explained by simple conservation laws. We discuss the relevance of this technique for the recent demonstration of magnetic trapping of antihydrogen. Conference Paper/Proceeding/Abstract AIP Conference Proceedings 1521 165 174 0094-243X 31 12 2013 2013-12-31 10.1063/1.4796072 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University 2013-06-18T09:39:31.2737917 2013-04-22T10:22:33.2447168 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics D. M Silveira 1 G. B Andresen 2 M. D Ashkezari 3 M Baquero-Ruiz 4 W Bertsche 5 P. D Bowe 6 E Butler 7 C. L Cesar 8 S Chapman 9 M Charlton 10 J Fajans 11 T Friesen 12 M. C Fujiwara 13 D. R Gill 14 J. S Hangst 15 W. N Hardy 16 M. E Hayden 17 R Hydomako 18 S Jonsell 19 L Kurchaninov 20 N Madsen 21 S Menary 22 P Nolan 23 K Olchanski 24 A Olin 25 A Povilus 26 P Pusa 27 F Robicheaux 28 E Sarid 29 C So 30 J. W Storey 31 R. I Thompson 32 D. P. van der Werf 33 J. S Wurtele 34 Dirk van der Werf 0000-0001-5436-5214 35 Niels Madsen 0000-0002-7372-0784 36
title Evaporative cooling of antiprotons for the production of trappable antihydrogen
spellingShingle Evaporative cooling of antiprotons for the production of trappable antihydrogen
Dirk van der Werf
Niels Madsen
title_short Evaporative cooling of antiprotons for the production of trappable antihydrogen
title_full Evaporative cooling of antiprotons for the production of trappable antihydrogen
title_fullStr Evaporative cooling of antiprotons for the production of trappable antihydrogen
title_full_unstemmed Evaporative cooling of antiprotons for the production of trappable antihydrogen
title_sort Evaporative cooling of antiprotons for the production of trappable antihydrogen
author_id_str_mv 4a4149ebce588e432f310f4ab44dd82a
e348e4d768ee19c1d0c68ce3a66d6303
author_id_fullname_str_mv 4a4149ebce588e432f310f4ab44dd82a_***_Dirk van der Werf
e348e4d768ee19c1d0c68ce3a66d6303_***_Niels Madsen
author Dirk van der Werf
Niels Madsen
author2 D. M Silveira
G. B Andresen
M. D Ashkezari
M Baquero-Ruiz
W Bertsche
P. D Bowe
E Butler
C. L Cesar
S Chapman
M Charlton
J Fajans
T Friesen
M. C Fujiwara
D. R Gill
J. S Hangst
W. N Hardy
M. E Hayden
R Hydomako
S Jonsell
L Kurchaninov
N Madsen
S Menary
P Nolan
K Olchanski
A Olin
A Povilus
P Pusa
F Robicheaux
E Sarid
C So
J. W Storey
R. I Thompson
D. P. van der Werf
J. S Wurtele
Dirk van der Werf
Niels Madsen
format Conference Paper/Proceeding/Abstract
container_title AIP Conference Proceedings
container_volume 1521
container_start_page 165
publishDate 2013
institution Swansea University
issn 0094-243X
doi_str_mv 10.1063/1.4796072
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 We describe the implementation of evaporative cooling of charged particles in the ALPHA apparatus. Forced evaporation has been applied to cold samples of antiprotons held in Malmberg-Penning traps. Temperatures on the order of 10 K were obtained, while retaining a significant fraction of the initial number of particles. We have developed a model for the evaporation process based on simple rate equations and applied it succesfully to the experimental data. We have also observed radial re-distribution of the clouds following evaporation, explained by simple conservation laws. We discuss the relevance of this technique for the recent demonstration of magnetic trapping of antihydrogen.
published_date 2013-12-31T12:30:19Z
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score 11.048237

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