Conference Paper/Proceeding/Abstract 1147 views
Evaporative cooling of antiprotons for the production of trappable antihydrogen
AIP Conference Proceedings, Volume: 1521, Pages: 165 - 174
Swansea University Authors:
Dirk van der Werf , Niels Madsen
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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...
Published in: | AIP Conference Proceedings |
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ISSN: | 0094-243X |
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2013
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URI: | https://cronfa.swan.ac.uk/Record/cronfa14622 |
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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. 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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 SPH 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 Physics COLLEGE CODE SPH 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 |
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1521 |
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165 |
publishDate |
2013 |
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Swansea University |
issn |
0094-243X |
doi_str_mv |
10.1063/1.4796072 |
college_str |
Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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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 |
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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 |
2013-12-31T03:16:43Z |
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1763750344108539904 |
score |
11.021648 |