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Antiproton cloud compression in the ALPHA apparatus at CERN / A. Gutierrez, M. D. Ashkezari, M. Baquero-Ruiz, W. Bertsche, C. Burrows, E. Butler, A. Capra, C. L. Cesar, M. Charlton, R. Dunlop, S. Eriksson, N. Evetts, J. Fajans, T. Friesen, M. C. Fujiwara, D. R. Gill, J. S. Hangst, W. N. Hardy, M. E. Hayden, C. A. Isaac, S. Jonsell, L. Kurchaninov, A. Little, N. Madsen, J. T. K. McKenna, S. Menary, S. C. Napoli, P. Nolan, K. Olchanski, A. Olin, P. Pusa, C. Ø. Rasmussen, F. Robicheaux, R. L. Sacramento, E. Sarid, D. M. Silveira, C. So, S. Stracka, J. Tarlton, T. D. Tharp, R. I. Thompson, P. Tooley, M. Turner, D. P. van der Werf, J. S. Wurtele, A. I. Zhmoginov, Dirk van der Werf, Niels Madsen, Aled Isaac, Stefan Eriksson, Michael Charlton

Hyperfine Interactions, Pages: 1 - 8

Swansea University Authors: Dirk van der Werf, Niels Madsen, Aled Isaac, Stefan Eriksson, Michael Charlton

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DOI (Published version): 10.1007/s10751-015-1202-4

Abstract

We have observed a new mechanism for compression of a non-neutral plasma, where antiprotons embedded in an electron plasma are compressed by a rotating wall drive at a frequency close to the sum of the axial bounce and rotation frequencies. The radius of the antiproton cloud is reduced by up to a fa...

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Published in: Hyperfine Interactions
Published: 2015
Online Access: http://link.springer.com/article/10.1007%2Fs10751-015-1202-4
URI: https://cronfa.swan.ac.uk/Record/cronfa24055
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The radius of the antiproton cloud is reduced by up to a factor of 20 and the smallest radius measured is &#x223C; 0.2 mm. When the rotating wall drive is applied to either a pure electron or pure antipro- ton plasma, no compression is observed in the frequency range of interest. The frequency range over which compression is evident is compared to the sum of the antiproton bounce frequency and the system&#x2019;s rotation frequency. It is suggested that bounce resonant transport is a likely explanation for the compression of antiproton clouds in this regime.</abstract><type>Journal Article</type><journal>Hyperfine Interactions</journal><paginationStart>1</paginationStart><paginationEnd>8</paginationEnd><publisher/><keywords/><publishedDay>12</publishedDay><publishedMonth>10</publishedMonth><publishedYear>2015</publishedYear><publishedDate>2015-10-12</publishedDate><doi>10.1007/s10751-015-1202-4</doi><url>http://link.springer.com/article/10.1007%2Fs10751-015-1202-4</url><notes>Proceedings of the 6th International Conference on Trapped Charged Particles and Fundamental Physics (TCP 2014), Takamatsu, Japan, 1&#x2013;5 December 2014</notes><college>COLLEGE NANME</college><department>Physics</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>SPH</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2015-10-30T09:37:37.8915114</lastEdited><Created>2015-10-30T09:35:04.7755484</Created><authors><author><firstname>A.</firstname><surname>Gutierrez</surname><order>1</order></author><author><firstname>M. D.</firstname><surname>Ashkezari</surname><order>2</order></author><author><firstname>M.</firstname><surname>Baquero-Ruiz</surname><order>3</order></author><author><firstname>W.</firstname><surname>Bertsche</surname><order>4</order></author><author><firstname>C.</firstname><surname>Burrows</surname><order>5</order></author><author><firstname>E.</firstname><surname>Butler</surname><order>6</order></author><author><firstname>A.</firstname><surname>Capra</surname><order>7</order></author><author><firstname>C. L.</firstname><surname>Cesar</surname><order>8</order></author><author><firstname>M.</firstname><surname>Charlton</surname><order>9</order></author><author><firstname>R.</firstname><surname>Dunlop</surname><order>10</order></author><author><firstname>S.</firstname><surname>Eriksson</surname><order>11</order></author><author><firstname>N.</firstname><surname>Evetts</surname><order>12</order></author><author><firstname>J.</firstname><surname>Fajans</surname><order>13</order></author><author><firstname>T.</firstname><surname>Friesen</surname><order>14</order></author><author><firstname>M. C.</firstname><surname>Fujiwara</surname><order>15</order></author><author><firstname>D. R.</firstname><surname>Gill</surname><order>16</order></author><author><firstname>J. S.</firstname><surname>Hangst</surname><order>17</order></author><author><firstname>W. N.</firstname><surname>Hardy</surname><order>18</order></author><author><firstname>M. 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C.</firstname><surname>Napoli</surname><order>27</order></author><author><firstname>P.</firstname><surname>Nolan</surname><order>28</order></author><author><firstname>K.</firstname><surname>Olchanski</surname><order>29</order></author><author><firstname>A.</firstname><surname>Olin</surname><order>30</order></author><author><firstname>P.</firstname><surname>Pusa</surname><order>31</order></author><author><firstname>C. &#xD8;.</firstname><surname>Rasmussen</surname><order>32</order></author><author><firstname>F.</firstname><surname>Robicheaux</surname><order>33</order></author><author><firstname>R. L.</firstname><surname>Sacramento</surname><order>34</order></author><author><firstname>E.</firstname><surname>Sarid</surname><order>35</order></author><author><firstname>D. 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spelling 2015-10-30T09:37:37.8915114 v2 24055 2015-10-30 Antiproton cloud compression in the ALPHA apparatus at CERN 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 06d7ed42719ef7bb697cf780c63e26f0 0000-0002-7813-1903 Aled Isaac Aled Isaac true false 785cbd474febb1bfa9c0e14abaf9c4a8 Stefan Eriksson Stefan Eriksson true false d9099cdd0f182eb9a1c8fc36ed94f53f Michael Charlton Michael Charlton true false 2015-10-30 SPH We have observed a new mechanism for compression of a non-neutral plasma, where antiprotons embedded in an electron plasma are compressed by a rotating wall drive at a frequency close to the sum of the axial bounce and rotation frequencies. The radius of the antiproton cloud is reduced by up to a factor of 20 and the smallest radius measured is ∼ 0.2 mm. When the rotating wall drive is applied to either a pure electron or pure antipro- ton plasma, no compression is observed in the frequency range of interest. The frequency range over which compression is evident is compared to the sum of the antiproton bounce frequency and the system’s rotation frequency. It is suggested that bounce resonant transport is a likely explanation for the compression of antiproton clouds in this regime. Journal Article Hyperfine Interactions 1 8 12 10 2015 2015-10-12 10.1007/s10751-015-1202-4 http://link.springer.com/article/10.1007%2Fs10751-015-1202-4 Proceedings of the 6th International Conference on Trapped Charged Particles and Fundamental Physics (TCP 2014), Takamatsu, Japan, 1–5 December 2014 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2015-10-30T09:37:37.8915114 2015-10-30T09:35:04.7755484 A. Gutierrez 1 M. D. Ashkezari 2 M. Baquero-Ruiz 3 W. Bertsche 4 C. Burrows 5 E. Butler 6 A. Capra 7 C. L. Cesar 8 M. Charlton 9 R. Dunlop 10 S. Eriksson 11 N. Evetts 12 J. Fajans 13 T. Friesen 14 M. C. Fujiwara 15 D. R. Gill 16 J. S. Hangst 17 W. N. Hardy 18 M. E. Hayden 19 C. A. Isaac 20 S. Jonsell 21 L. Kurchaninov 22 A. Little 23 N. Madsen 24 J. T. K. McKenna 25 S. Menary 26 S. C. Napoli 27 P. Nolan 28 K. Olchanski 29 A. Olin 30 P. Pusa 31 C. Ø. Rasmussen 32 F. Robicheaux 33 R. L. Sacramento 34 E. Sarid 35 D. M. Silveira 36 C. So 37 S. Stracka 38 J. Tarlton 39 T. D. Tharp 40 R. I. Thompson 41 P. Tooley 42 M. Turner 43 D. P. van der Werf 44 J. S. Wurtele 45 A. I. Zhmoginov 46 Dirk van der Werf 0000-0001-5436-5214 47 Niels Madsen 0000-0002-7372-0784 48 Aled Isaac 0000-0002-7813-1903 49 Stefan Eriksson 50 Michael Charlton 51
title Antiproton cloud compression in the ALPHA apparatus at CERN
spellingShingle Antiproton cloud compression in the ALPHA apparatus at CERN
Dirk, van der Werf
Niels, Madsen
Aled, Isaac
Stefan, Eriksson
Michael, Charlton
title_short Antiproton cloud compression in the ALPHA apparatus at CERN
title_full Antiproton cloud compression in the ALPHA apparatus at CERN
title_fullStr Antiproton cloud compression in the ALPHA apparatus at CERN
title_full_unstemmed Antiproton cloud compression in the ALPHA apparatus at CERN
title_sort Antiproton cloud compression in the ALPHA apparatus at CERN
author_id_str_mv 4a4149ebce588e432f310f4ab44dd82a
e348e4d768ee19c1d0c68ce3a66d6303
06d7ed42719ef7bb697cf780c63e26f0
785cbd474febb1bfa9c0e14abaf9c4a8
d9099cdd0f182eb9a1c8fc36ed94f53f
author_id_fullname_str_mv 4a4149ebce588e432f310f4ab44dd82a_***_Dirk, van der Werf
e348e4d768ee19c1d0c68ce3a66d6303_***_Niels, Madsen
06d7ed42719ef7bb697cf780c63e26f0_***_Aled, Isaac
785cbd474febb1bfa9c0e14abaf9c4a8_***_Stefan, Eriksson
d9099cdd0f182eb9a1c8fc36ed94f53f_***_Michael, Charlton
author Dirk, van der Werf
Niels, Madsen
Aled, Isaac
Stefan, Eriksson
Michael, Charlton
author2 A. Gutierrez
M. D. Ashkezari
M. Baquero-Ruiz
W. Bertsche
C. Burrows
E. Butler
A. Capra
C. L. Cesar
M. Charlton
R. Dunlop
S. Eriksson
N. Evetts
J. Fajans
T. Friesen
M. C. Fujiwara
D. R. Gill
J. S. Hangst
W. N. Hardy
M. E. Hayden
C. A. Isaac
S. Jonsell
L. Kurchaninov
A. Little
N. Madsen
J. T. K. McKenna
S. Menary
S. C. Napoli
P. Nolan
K. Olchanski
A. Olin
P. Pusa
C. Ø. Rasmussen
F. Robicheaux
R. L. Sacramento
E. Sarid
D. M. Silveira
C. So
S. Stracka
J. Tarlton
T. D. Tharp
R. I. Thompson
P. Tooley
M. Turner
D. P. van der Werf
J. S. Wurtele
A. I. Zhmoginov
Dirk van der Werf
Niels Madsen
Aled Isaac
Stefan Eriksson
Michael Charlton
format Journal article
container_title Hyperfine Interactions
container_start_page 1
publishDate 2015
institution Swansea University
doi_str_mv 10.1007/s10751-015-1202-4
url http://link.springer.com/article/10.1007%2Fs10751-015-1202-4
document_store_str 0
active_str 0
description We have observed a new mechanism for compression of a non-neutral plasma, where antiprotons embedded in an electron plasma are compressed by a rotating wall drive at a frequency close to the sum of the axial bounce and rotation frequencies. The radius of the antiproton cloud is reduced by up to a factor of 20 and the smallest radius measured is ∼ 0.2 mm. When the rotating wall drive is applied to either a pure electron or pure antipro- ton plasma, no compression is observed in the frequency range of interest. The frequency range over which compression is evident is compared to the sum of the antiproton bounce frequency and the system’s rotation frequency. It is suggested that bounce resonant transport is a likely explanation for the compression of antiproton clouds in this regime.
published_date 2015-10-12T03:38:25Z
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score 10.81997