Antiproton cloud compression in the ALPHA apparatus at CERN

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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Detalles Bibliográficos
Autores principales: Gutierrez, A, Ashkezari, M D, Baquero-Ruiz, M, Bertsche, W, Burrows, C, Butler, E, Capra, A, Cesar, C L, Charlton, M, Dunlop, R, Eriksson, S, Evetts, N, Fajans, J, Friesen, T, Fujiwara, M C, Gill, D R, Hangst, J S, Hardy, W N, Hayden, M E, Isaac, C A, Jonsell, S, Kurchaninov, L, Little, A, Madsen, N, K McKenna, J T, Menary, S, Napoli, S C, Nolan, P, Olchanski, K, Olin, A, Pusa, P, Rasmussen, C Ø, Robicheaux, F, Sacramento, R L, Sarid, E, Silveira, D M, So, C, Stracka, S, Tarlton, J, Tharp, T D, Thompson, R I, Tooley, P, Turner, M, der Werf, D P, Wurtele, J S, Zhmoginov, A I
Lenguaje:eng
Publicado: 2015
Materias:
Nuclear Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1007/s10751-015-1202-4
http://cds.cern.ch/record/2159205
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author Gutierrez, A
Ashkezari, M D
Baquero-Ruiz, M
Bertsche, W
Burrows, C
Butler, E
Capra, A
Cesar, C L
Charlton, M
Dunlop, R
Eriksson, S
Evetts, N
Fajans, J
Friesen, T
Fujiwara, M C
Gill, D R
Hangst, J S
Hardy, W N
Hayden, M E
Isaac, C A
Jonsell, S
Kurchaninov, L
Little, A
Madsen, N
K McKenna, J T
Menary, S
Napoli, S C
Nolan, P
Olchanski, K
Olin, A
Pusa, P
Rasmussen, C Ø
Robicheaux, F
Sacramento, R L
Sarid, E
Silveira, D M
So, C
Stracka, S
Tarlton, J
Tharp, T D
Thompson, R I
Tooley, P
Turner, M
der Werf, D P
Wurtele, J S
Zhmoginov, A I
author_facet Gutierrez, A
Ashkezari, M D
Baquero-Ruiz, M
Bertsche, W
Burrows, C
Butler, E
Capra, A
Cesar, C L
Charlton, M
Dunlop, R
Eriksson, S
Evetts, N
Fajans, J
Friesen, T
Fujiwara, M C
Gill, D R
Hangst, J S
Hardy, W N
Hayden, M E
Isaac, C A
Jonsell, S
Kurchaninov, L
Little, A
Madsen, N
K McKenna, J T
Menary, S
Napoli, S C
Nolan, P
Olchanski, K
Olin, A
Pusa, P
Rasmussen, C Ø
Robicheaux, F
Sacramento, R L
Sarid, E
Silveira, D M
So, C
Stracka, S
Tarlton, J
Tharp, T D
Thompson, R I
Tooley, P
Turner, M
der Werf, D P
Wurtele, J S
Zhmoginov, A I
author_sort Gutierrez, A
collection CERN
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 antiproton 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.
id oai-inspirehep.net-1419835
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2015
record_format invenio
spelling oai-inspirehep.net-14198352019-09-30T06:29:59Zdoi:10.1007/s10751-015-1202-4http://cds.cern.ch/record/2159205engGutierrez, AAshkezari, M DBaquero-Ruiz, MBertsche, WBurrows, CButler, ECapra, ACesar, C LCharlton, MDunlop, REriksson, SEvetts, NFajans, JFriesen, TFujiwara, M CGill, D RHangst, J SHardy, W NHayden, M EIsaac, C AJonsell, SKurchaninov, LLittle, AMadsen, NK McKenna, J TMenary, SNapoli, S CNolan, POlchanski, KOlin, APusa, PRasmussen, C ØRobicheaux, FSacramento, R LSarid, ESilveira, D MSo, CStracka, STarlton, JTharp, T DThompson, R ITooley, PTurner, Mder Werf, D PWurtele, J SZhmoginov, A IAntiproton cloud compression in the ALPHA apparatus at CERNNuclear Physics - ExperimentWe 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 antiproton 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.oai:inspirehep.net:14198352015
spellingShingle Nuclear Physics - Experiment
Gutierrez, A
Ashkezari, M D
Baquero-Ruiz, M
Bertsche, W
Burrows, C
Butler, E
Capra, A
Cesar, C L
Charlton, M
Dunlop, R
Eriksson, S
Evetts, N
Fajans, J
Friesen, T
Fujiwara, M C
Gill, D R
Hangst, J S
Hardy, W N
Hayden, M E
Isaac, C A
Jonsell, S
Kurchaninov, L
Little, A
Madsen, N
K McKenna, J T
Menary, S
Napoli, S C
Nolan, P
Olchanski, K
Olin, A
Pusa, P
Rasmussen, C Ø
Robicheaux, F
Sacramento, R L
Sarid, E
Silveira, D M
So, C
Stracka, S
Tarlton, J
Tharp, T D
Thompson, R I
Tooley, P
Turner, M
der Werf, D P
Wurtele, J S
Zhmoginov, A I
Antiproton cloud compression in the ALPHA apparatus at CERN
title 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_short Antiproton cloud compression in the ALPHA apparatus at CERN
title_sort antiproton cloud compression in the alpha apparatus at cern
topic Nuclear Physics - Experiment
url https://dx.doi.org/10.1007/s10751-015-1202-4
http://cds.cern.ch/record/2159205
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