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The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen

R. Akbari Orcid Logo, B.X.R. Alves, Christopher Baker Orcid Logo, M. Baquero-Ruiz, W. Bertsche, Eoin Butler, Christopher Burrows, A. Capra Orcid Logo, C.L. Cesar Orcid Logo, Michael Charlton, R. Collister, April Cridland Orcid Logo, Stefan Eriksson Orcid Logo, A. Evans, L.T. Evans, N. Evetts, J. Fajans, T. Friesen, M.C. Fujiwara, D.R. Gill, P. Grandemange Orcid Logo, P. Granum Orcid Logo, A. Gutierrez, J.S. Hangst, M.E. Hayden, D. Hodgkinson Orcid Logo, Aled Isaac Orcid Logo, A. Ishida Orcid Logo, M.A. Johnson Orcid Logo, Jack Jones, S.A. Jones Orcid Logo, S. Jonsell Orcid Logo, A. Khramov, L. Kurchaninov Orcid Logo, A. Little, Niels Madsen Orcid Logo, Daniel Maxwell Orcid Logo, J.T.K. McKenna Orcid Logo, S. Menary, J.M. Michan, T. Momose Orcid Logo, Patrick Mullan, K. Olchanski, A. Olin Orcid Logo, JOANNA PESZKA, A. Povilus, A. Powell Orcid Logo, P. Pusa, C.Ø. Rasmussen, R.L. Sacramento, M. Sameed Orcid Logo, E. Sarid, D.M. Silveira, C. So, S. Stracka Orcid Logo, G. Stutter, T.D. Tharp Orcid Logo, R.I. Thompson, C. Torkzaban Orcid Logo, Dirk van der Werf Orcid Logo, J.S. Wurtele

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume: 1072, Start page: 170194

Swansea University Authors: Christopher Baker Orcid Logo, Eoin Butler, Christopher Burrows, Michael Charlton, April Cridland Orcid Logo, Stefan Eriksson Orcid Logo, Aled Isaac Orcid Logo, Jack Jones, Niels Madsen Orcid Logo, Daniel Maxwell Orcid Logo, Patrick Mullan, JOANNA PESZKA, Dirk van der Werf Orcid Logo

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DOI (Published version): 10.1016/j.nima.2024.170194

Abstract

This paper describes the ALPHA-2 apparatus, used at the CERN Antiproton Decelerator facility for the study of trapped antihydrogen atoms. Details of both the construction and performance are included. Prominence is given to both the new and the improved features, with respect to the original ALPHA a...

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Published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ISSN: 0168-9002
Published: Elsevier BV 2025
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first_indexed 2025-01-29T12:58:12Z
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Details of both the construction and performance are included. Prominence is given to both the new and the improved features, with respect to the original ALPHA assembly, of the apparatus including a stand-alone antiproton catching trap, the traps used to mix antiparticles to produce the anti-atoms, the magnetic atom trap used to hold some of them, and access for laser light to facilitate excitation of the antihydrogen 1-2 and 1-2 transitions.</abstract><type>Journal Article</type><journal>Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment</journal><volume>1072</volume><journalNumber/><paginationStart>170194</paginationStart><paginationEnd/><publisher>Elsevier BV</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>0168-9002</issnPrint><issnElectronic/><keywords>Antihydrogen; Antiprotons; Catching trap; Positrons; Neutral atom trap; Lasers; Microwaves; Silicon vertex detector</keywords><publishedDay>1</publishedDay><publishedMonth>3</publishedMonth><publishedYear>2025</publishedYear><publishedDate>2025-03-01</publishedDate><doi>10.1016/j.nima.2024.170194</doi><url/><notes/><college>COLLEGE NANME</college><department>Engineering and Applied Sciences School</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>EAAS</DepartmentCode><institution>Swansea University</institution><apcterm/><funders>Our work has been supported by a number of funding agencies. We are grateful to: the European Research Council through its Advanced Programme (JSH); CNPq and FAPERJ and RENAFAE (Brazil); NSERC, CFI, NRC/TRIUMF and EHPDS/EHDRS (Canada); FNU (Nice center); Carlsberg Foundation (Denmark); ISF (Israel); STFC, EPSRC, the Royal Society and the Leverhulme Trust (UK); DOE and NSF (USA) and VR (Sweden).</funders><projectreference/><lastEdited>2025-03-04T14:38:01.2449699</lastEdited><Created>2025-01-29T12:55:41.5819214</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Physics</level></path><authors><author><firstname>R.</firstname><surname>Akbari</surname><orcid>0000-0002-9628-5068</orcid><order>1</order></author><author><firstname>B.X.R.</firstname><surname>Alves</surname><order>2</order></author><author><firstname>Christopher</firstname><surname>Baker</surname><orcid>0000-0002-9448-8419</orcid><order>3</order></author><author><firstname>M.</firstname><surname>Baquero-Ruiz</surname><order>4</order></author><author><firstname>W.</firstname><surname>Bertsche</surname><order>5</order></author><author><firstname>Eoin</firstname><surname>Butler</surname><order>6</order></author><author><firstname>Christopher</firstname><surname>Burrows</surname><order>7</order></author><author><firstname>A.</firstname><surname>Capra</surname><orcid>0000-0001-9499-0380</orcid><order>8</order></author><author><firstname>C.L.</firstname><surname>Cesar</surname><orcid>0000-0003-2638-0032</orcid><order>9</order></author><author><firstname>Michael</firstname><surname>Charlton</surname><order>10</order></author><author><firstname>R.</firstname><surname>Collister</surname><order>11</order></author><author><firstname>April</firstname><surname>Cridland</surname><orcid>0000-0003-4361-0266</orcid><order>12</order></author><author><firstname>Stefan</firstname><surname>Eriksson</surname><orcid>0000-0002-5390-1879</orcid><order>13</order></author><author><firstname>A.</firstname><surname>Evans</surname><order>14</order></author><author><firstname>L.T.</firstname><surname>Evans</surname><order>15</order></author><author><firstname>N.</firstname><surname>Evetts</surname><order>16</order></author><author><firstname>J.</firstname><surname>Fajans</surname><order>17</order></author><author><firstname>T.</firstname><surname>Friesen</surname><order>18</order></author><author><firstname>M.C.</firstname><surname>Fujiwara</surname><order>19</order></author><author><firstname>D.R.</firstname><surname>Gill</surname><order>20</order></author><author><firstname>P.</firstname><surname>Grandemange</surname><orcid>0000-0002-5550-1529</orcid><order>21</order></author><author><firstname>P.</firstname><surname>Granum</surname><orcid>0000-0002-2710-266x</orcid><order>22</order></author><author><firstname>A.</firstname><surname>Gutierrez</surname><order>23</order></author><author><firstname>J.S.</firstname><surname>Hangst</surname><order>24</order></author><author><firstname>M.E.</firstname><surname>Hayden</surname><order>25</order></author><author><firstname>D.</firstname><surname>Hodgkinson</surname><orcid>0000-0003-3410-5540</orcid><order>26</order></author><author><firstname>Aled</firstname><surname>Isaac</surname><orcid>0000-0002-7813-1903</orcid><order>27</order></author><author><firstname>A.</firstname><surname>Ishida</surname><orcid>0000-0002-9880-6517</orcid><order>28</order></author><author><firstname>M.A.</firstname><surname>Johnson</surname><orcid>0000-0002-0654-2658</orcid><order>29</order></author><author><firstname>Jack</firstname><surname>Jones</surname><order>30</order></author><author><firstname>S.A.</firstname><surname>Jones</surname><orcid>0000-0001-8205-2186</orcid><order>31</order></author><author><firstname>S.</firstname><surname>Jonsell</surname><orcid>0000-0003-4969-1714</orcid><order>32</order></author><author><firstname>A.</firstname><surname>Khramov</surname><order>33</order></author><author><firstname>L.</firstname><surname>Kurchaninov</surname><orcid>0000-0001-9392-3936</orcid><order>34</order></author><author><firstname>A.</firstname><surname>Little</surname><order>35</order></author><author><firstname>Niels</firstname><surname>Madsen</surname><orcid>0000-0002-7372-0784</orcid><order>36</order></author><author><firstname>Daniel</firstname><surname>Maxwell</surname><orcid>0000-0001-5178-9492</orcid><order>37</order></author><author><firstname>J.T.K.</firstname><surname>McKenna</surname><orcid>0000-0002-7838-4230</orcid><order>38</order></author><author><firstname>S.</firstname><surname>Menary</surname><order>39</order></author><author><firstname>J.M.</firstname><surname>Michan</surname><order>40</order></author><author><firstname>T.</firstname><surname>Momose</surname><orcid>0000-0001-8976-1938</orcid><order>41</order></author><author><firstname>Patrick</firstname><surname>Mullan</surname><order>42</order></author><author><firstname>K.</firstname><surname>Olchanski</surname><order>43</order></author><author><firstname>A.</firstname><surname>Olin</surname><orcid>0000-0001-8055-7180</orcid><order>44</order></author><author><firstname>JOANNA</firstname><surname>PESZKA</surname><order>45</order></author><author><firstname>A.</firstname><surname>Povilus</surname><order>46</order></author><author><firstname>A.</firstname><surname>Powell</surname><orcid>0000-0003-2475-6067</orcid><order>47</order></author><author><firstname>P.</firstname><surname>Pusa</surname><order>48</order></author><author><firstname>C.&#xD8;.</firstname><surname>Rasmussen</surname><order>49</order></author><author><firstname>R.L.</fir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spelling 2025-03-04T14:38:01.2449699 v2 68754 2025-01-29 The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen 0c72afb63bd0c6089fc5b60bd096103e 0000-0002-9448-8419 Christopher Baker Christopher Baker true false 1a1f990eb2b44482a4f87935de2e3ef6 Eoin Butler Eoin Butler true false 0485357303d04d78ca7fdfaef6c6eb44 Christopher Burrows Christopher Burrows true false d9099cdd0f182eb9a1c8fc36ed94f53f Michael Charlton Michael Charlton true false e3c734cfda1e0b3835968762f39525cc 0000-0003-4361-0266 April Cridland April Cridland true false 785cbd474febb1bfa9c0e14abaf9c4a8 0000-0002-5390-1879 Stefan Eriksson Stefan Eriksson true false 06d7ed42719ef7bb697cf780c63e26f0 0000-0002-7813-1903 Aled Isaac Aled Isaac true false a1fd0a804e977beb3835bad353db5f72 Jack Jones Jack Jones true false e348e4d768ee19c1d0c68ce3a66d6303 0000-0002-7372-0784 Niels Madsen Niels Madsen true false e8ebdf12e608884a8d4ea4af35b89b46 0000-0001-5178-9492 Daniel Maxwell Daniel Maxwell true false d5167e8661859aff63e7984b1a421667 Patrick Mullan Patrick Mullan true false d11388181f4f4559514f02e9212c6ca1 JOANNA PESZKA JOANNA PESZKA true false 4a4149ebce588e432f310f4ab44dd82a 0000-0001-5436-5214 Dirk van der Werf Dirk van der Werf true false 2025-01-29 EAAS This paper describes the ALPHA-2 apparatus, used at the CERN Antiproton Decelerator facility for the study of trapped antihydrogen atoms. Details of both the construction and performance are included. Prominence is given to both the new and the improved features, with respect to the original ALPHA assembly, of the apparatus including a stand-alone antiproton catching trap, the traps used to mix antiparticles to produce the anti-atoms, the magnetic atom trap used to hold some of them, and access for laser light to facilitate excitation of the antihydrogen 1-2 and 1-2 transitions. Journal Article Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 1072 170194 Elsevier BV 0168-9002 Antihydrogen; Antiprotons; Catching trap; Positrons; Neutral atom trap; Lasers; Microwaves; Silicon vertex detector 1 3 2025 2025-03-01 10.1016/j.nima.2024.170194 COLLEGE NANME Engineering and Applied Sciences School COLLEGE CODE EAAS Swansea University Our work has been supported by a number of funding agencies. We are grateful to: the European Research Council through its Advanced Programme (JSH); CNPq and FAPERJ and RENAFAE (Brazil); NSERC, CFI, NRC/TRIUMF and EHPDS/EHDRS (Canada); FNU (Nice center); Carlsberg Foundation (Denmark); ISF (Israel); STFC, EPSRC, the Royal Society and the Leverhulme Trust (UK); DOE and NSF (USA) and VR (Sweden). 2025-03-04T14:38:01.2449699 2025-01-29T12:55:41.5819214 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics R. Akbari 0000-0002-9628-5068 1 B.X.R. Alves 2 Christopher Baker 0000-0002-9448-8419 3 M. Baquero-Ruiz 4 W. Bertsche 5 Eoin Butler 6 Christopher Burrows 7 A. Capra 0000-0001-9499-0380 8 C.L. Cesar 0000-0003-2638-0032 9 Michael Charlton 10 R. Collister 11 April Cridland 0000-0003-4361-0266 12 Stefan Eriksson 0000-0002-5390-1879 13 A. Evans 14 L.T. Evans 15 N. Evetts 16 J. Fajans 17 T. Friesen 18 M.C. Fujiwara 19 D.R. Gill 20 P. Grandemange 0000-0002-5550-1529 21 P. Granum 0000-0002-2710-266x 22 A. Gutierrez 23 J.S. Hangst 24 M.E. Hayden 25 D. Hodgkinson 0000-0003-3410-5540 26 Aled Isaac 0000-0002-7813-1903 27 A. Ishida 0000-0002-9880-6517 28 M.A. Johnson 0000-0002-0654-2658 29 Jack Jones 30 S.A. Jones 0000-0001-8205-2186 31 S. Jonsell 0000-0003-4969-1714 32 A. Khramov 33 L. Kurchaninov 0000-0001-9392-3936 34 A. Little 35 Niels Madsen 0000-0002-7372-0784 36 Daniel Maxwell 0000-0001-5178-9492 37 J.T.K. McKenna 0000-0002-7838-4230 38 S. Menary 39 J.M. Michan 40 T. Momose 0000-0001-8976-1938 41 Patrick Mullan 42 K. Olchanski 43 A. Olin 0000-0001-8055-7180 44 JOANNA PESZKA 45 A. Povilus 46 A. Powell 0000-0003-2475-6067 47 P. Pusa 48 C.Ø. Rasmussen 49 R.L. Sacramento 50 M. Sameed 0000-0002-9706-8970 51 E. Sarid 52 D.M. Silveira 53 C. So 54 S. Stracka 0000-0003-0013-4714 55 G. Stutter 56 T.D. Tharp 0009-0009-7109-6832 57 R.I. Thompson 58 C. Torkzaban 0000-0002-3951-5461 59 Dirk van der Werf 0000-0001-5436-5214 60 J.S. Wurtele 61 68754__33682__4b6a177070524176b41a6d3afd2bbfbc.pdf 68754.VoR.pdf 2025-02-26T11:39:31.5944367 Output 6059978 application/pdf Version of Record true © 2025 The Authors. This is an open access article under the CC BY license. true eng http://creativecommons.org/licenses/by/4.0/
title The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen
spellingShingle The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen
Christopher Baker
Eoin Butler
Christopher Burrows
Michael Charlton
April Cridland
Stefan Eriksson
Aled Isaac
Jack Jones
Niels Madsen
Daniel Maxwell
Patrick Mullan
JOANNA PESZKA
Dirk van der Werf
title_short The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen
title_full The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen
title_fullStr The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen
title_full_unstemmed The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen
title_sort The ALPHA-2 apparatus - facilitating experimentation with trapped antihydrogen
author_id_str_mv 0c72afb63bd0c6089fc5b60bd096103e
1a1f990eb2b44482a4f87935de2e3ef6
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d9099cdd0f182eb9a1c8fc36ed94f53f
e3c734cfda1e0b3835968762f39525cc
785cbd474febb1bfa9c0e14abaf9c4a8
06d7ed42719ef7bb697cf780c63e26f0
a1fd0a804e977beb3835bad353db5f72
e348e4d768ee19c1d0c68ce3a66d6303
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author_id_fullname_str_mv 0c72afb63bd0c6089fc5b60bd096103e_***_Christopher Baker
1a1f990eb2b44482a4f87935de2e3ef6_***_Eoin Butler
0485357303d04d78ca7fdfaef6c6eb44_***_Christopher Burrows
d9099cdd0f182eb9a1c8fc36ed94f53f_***_Michael Charlton
e3c734cfda1e0b3835968762f39525cc_***_April Cridland
785cbd474febb1bfa9c0e14abaf9c4a8_***_Stefan Eriksson
06d7ed42719ef7bb697cf780c63e26f0_***_Aled Isaac
a1fd0a804e977beb3835bad353db5f72_***_Jack Jones
e348e4d768ee19c1d0c68ce3a66d6303_***_Niels Madsen
e8ebdf12e608884a8d4ea4af35b89b46_***_Daniel Maxwell
d5167e8661859aff63e7984b1a421667_***_Patrick Mullan
d11388181f4f4559514f02e9212c6ca1_***_JOANNA PESZKA
4a4149ebce588e432f310f4ab44dd82a_***_Dirk van der Werf
author Christopher Baker
Eoin Butler
Christopher Burrows
Michael Charlton
April Cridland
Stefan Eriksson
Aled Isaac
Jack Jones
Niels Madsen
Daniel Maxwell
Patrick Mullan
JOANNA PESZKA
Dirk van der Werf
author2 R. Akbari
B.X.R. Alves
Christopher Baker
M. Baquero-Ruiz
W. Bertsche
Eoin Butler
Christopher Burrows
A. Capra
C.L. Cesar
Michael Charlton
R. Collister
April Cridland
Stefan Eriksson
A. Evans
L.T. Evans
N. Evetts
J. Fajans
T. Friesen
M.C. Fujiwara
D.R. Gill
P. Grandemange
P. Granum
A. Gutierrez
J.S. Hangst
M.E. Hayden
D. Hodgkinson
Aled Isaac
A. Ishida
M.A. Johnson
Jack Jones
S.A. Jones
S. Jonsell
A. Khramov
L. Kurchaninov
A. Little
Niels Madsen
Daniel Maxwell
J.T.K. McKenna
S. Menary
J.M. Michan
T. Momose
Patrick Mullan
K. Olchanski
A. Olin
JOANNA PESZKA
A. Povilus
A. Powell
P. Pusa
C.Ø. Rasmussen
R.L. Sacramento
M. Sameed
E. Sarid
D.M. Silveira
C. So
S. Stracka
G. Stutter
T.D. Tharp
R.I. Thompson
C. Torkzaban
Dirk van der Werf
J.S. Wurtele
format Journal article
container_title Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
container_volume 1072
container_start_page 170194
publishDate 2025
institution Swansea University
issn 0168-9002
doi_str_mv 10.1016/j.nima.2024.170194
publisher Elsevier BV
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 1
active_str 0
description This paper describes the ALPHA-2 apparatus, used at the CERN Antiproton Decelerator facility for the study of trapped antihydrogen atoms. Details of both the construction and performance are included. Prominence is given to both the new and the improved features, with respect to the original ALPHA assembly, of the apparatus including a stand-alone antiproton catching trap, the traps used to mix antiparticles to produce the anti-atoms, the magnetic atom trap used to hold some of them, and access for laser light to facilitate excitation of the antihydrogen 1-2 and 1-2 transitions.
published_date 2025-03-01T08:15:46Z
_version_ 1828636586966777856
score 11.056659

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