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Antihydrogen formation by autoresonant excitation of antiproton plasmas

William Alan Bertsche, G. B Andresen, M. D Ashkezari, M Baquero-Ruiz, P. D Bowe, P. T Carpenter, E Butler, C. L Cesar, S. F Chapman, M Charlton, S Eriksson, J Fajans, T Friesen, M. C Fujiwara, D. R Gill, A Gutierrez, J. S Hangst, W. N Hardy, R. S Hayano, M. E Hayden, A. J Humphries, J. L Hurt, R Hydomako, S Jonsell, L Kurchaninov, 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, J. S Wurtele, Y Yamazaki, Niels Madsen Orcid Logo

LEAP 2011, Pages: 61 - 67

Swansea University Author: Niels Madsen Orcid Logo

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DOI (Published version): 10.1007/978-94-007-5530-7_7

Abstract

In efforts to trap antihydrogen, a key problem is the vast disparity between the neutral trap energy scale (˜ 50 \upmueV), and the energy scales associated with plasma confinement and space charge ( 1 eV). In order to merge charged particle species for direct recombination, the larger energy scale m...

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Published in: LEAP 2011
Published: Vancouver Springer 2013
URI: https://cronfa.swan.ac.uk/Record/cronfa15091
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spelling 2013-06-18T09:46:34.5451580 v2 15091 2013-06-14 Antihydrogen formation by autoresonant excitation of antiproton plasmas e348e4d768ee19c1d0c68ce3a66d6303 0000-0002-7372-0784 Niels Madsen Niels Madsen true false 2013-06-14 SPH In efforts to trap antihydrogen, a key problem is the vast disparity between the neutral trap energy scale (˜ 50 \upmueV), and the energy scales associated with plasma confinement and space charge ( 1 eV). In order to merge charged particle species for direct recombination, the larger energy scale must be overcome in a manner that minimizes the initial antihydrogen kinetic energy. This issue motivated the development of a novel injection technique utilizing the inherent nonlinear nature of particle oscillations in our traps. We demonstrated controllable excitation of the center-of-mass longitudinal motion of a thermal antiproton plasma using a swept-frequency autoresonant drive. When the plasma is cold, dense and highly collective in nature, we observe that the entire system behaves as a single-particle nonlinear oscillator, as predicted by a recent theory. In contrast, only a fraction of the antiprotons in a warm or tenuous plasma can be similarly excited. Antihydrogen was produced and trapped by using this technique to drive antiprotons into a positron plasma, thereby initiating atomic recombination. The nature of this injection overcomes some of the difficulties associated with matching the energies of the charged species used to produce antihydrogen. Conference Paper/Proceeding/Abstract LEAP 2011 61 67 Springer Vancouver 31 12 2013 2013-12-31 10.1007/978-94-007-5530-7_7 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2013-06-18T09:46:34.5451580 2013-06-14T13:07:25.5180119 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics William Alan Bertsche 1 G. B Andresen 2 M. D Ashkezari 3 M Baquero-Ruiz 4 P. D Bowe 5 P. T Carpenter 6 E Butler 7 C. L Cesar 8 S. F Chapman 9 M Charlton 10 S Eriksson 11 J Fajans 12 T Friesen 13 M. C Fujiwara 14 D. R Gill 15 A Gutierrez 16 J. S Hangst 17 W. N Hardy 18 R. S Hayano 19 M. E Hayden 20 A. J Humphries 21 J. L Hurt 22 R Hydomako 23 S Jonsell 24 L Kurchaninov 25 N Madsen 26 S Menary 27 P Nolan 28 K Olchanski 29 A Olin 30 A Povilus 31 P Pusa 32 F Robicheaux 33 E Sarid 34 D. M Silveira 35 C So 36 J. W Storey 37 R. I Thompson 38 D. P. van der Werf 39 J. S Wurtele 40 Y Yamazaki 41 Niels Madsen 0000-0002-7372-0784 42
title Antihydrogen formation by autoresonant excitation of antiproton plasmas
spellingShingle Antihydrogen formation by autoresonant excitation of antiproton plasmas
Niels Madsen
title_short Antihydrogen formation by autoresonant excitation of antiproton plasmas
title_full Antihydrogen formation by autoresonant excitation of antiproton plasmas
title_fullStr Antihydrogen formation by autoresonant excitation of antiproton plasmas
title_full_unstemmed Antihydrogen formation by autoresonant excitation of antiproton plasmas
title_sort Antihydrogen formation by autoresonant excitation of antiproton plasmas
author_id_str_mv e348e4d768ee19c1d0c68ce3a66d6303
author_id_fullname_str_mv e348e4d768ee19c1d0c68ce3a66d6303_***_Niels Madsen
author Niels Madsen
author2 William Alan Bertsche
G. B Andresen
M. D Ashkezari
M Baquero-Ruiz
P. D Bowe
P. T Carpenter
E Butler
C. L Cesar
S. F Chapman
M Charlton
S Eriksson
J Fajans
T Friesen
M. C Fujiwara
D. R Gill
A Gutierrez
J. S Hangst
W. N Hardy
R. S Hayano
M. E Hayden
A. J Humphries
J. L Hurt
R Hydomako
S Jonsell
L Kurchaninov
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
J. S Wurtele
Y Yamazaki
Niels Madsen
format Conference Paper/Proceeding/Abstract
container_title LEAP 2011
container_start_page 61
publishDate 2013
institution Swansea University
doi_str_mv 10.1007/978-94-007-5530-7_7
publisher Springer
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 In efforts to trap antihydrogen, a key problem is the vast disparity between the neutral trap energy scale (˜ 50 \upmueV), and the energy scales associated with plasma confinement and space charge ( 1 eV). In order to merge charged particle species for direct recombination, the larger energy scale must be overcome in a manner that minimizes the initial antihydrogen kinetic energy. This issue motivated the development of a novel injection technique utilizing the inherent nonlinear nature of particle oscillations in our traps. We demonstrated controllable excitation of the center-of-mass longitudinal motion of a thermal antiproton plasma using a swept-frequency autoresonant drive. When the plasma is cold, dense and highly collective in nature, we observe that the entire system behaves as a single-particle nonlinear oscillator, as predicted by a recent theory. In contrast, only a fraction of the antiprotons in a warm or tenuous plasma can be similarly excited. Antihydrogen was produced and trapped by using this technique to drive antiprotons into a positron plasma, thereby initiating atomic recombination. The nature of this injection overcomes some of the difficulties associated with matching the energies of the charged species used to produce antihydrogen.
published_date 2013-12-31T03:17:13Z
_version_ 1763750375819575296
score 11.016235

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