Journal article 1434 views
Antiproton cloud compression in the ALPHA apparatus at CERN
,
N. Evetts,
J. Fajans,
T. Friesen,
M. C. Fujiwara,
D. R. Gill,
J. S. Hangst,
W. N. Hardy,
M. E. Hayden,
Aled Isaac ,
S. Jonsell,
L. Kurchaninov,
A. Little,
Niels 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,
Dirk van der Werf ,
J. S. Wurtele,
A. I. Zhmoginov
Hyperfine Interactions, Volume: 235, Issue: 1-3, Pages: 21 - 28
Swansea University Authors:
Michael Charlton, Stefan Eriksson , Aled Isaac , Niels Madsen , Dirk van der Werf
Full text not available from this repository: check for access using links below.
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...
| Published in: | Hyperfine Interactions |
|---|---|
| ISSN: | 0304-3843 1572-9540 |
| Published: |
Springer Science and Business Media LLC
2015
|
| Online Access: |
Check full text
|
| URI: | https://cronfa.swan.ac.uk/Record/cronfa24055 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| 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 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. |
|---|---|
| Item Description: |
Proceedings of the 6th International Conference on Trapped Charged Particles and Fundamental Physics (TCP 2014), Takamatsu, Japan, 1–5 December 2014 |
| Keywords: |
Antiprotons; Rotating wall; Compression; Electrons; Penning-Malmberg trap; Non-neutral plasma; Antihydrogen |
| College: |
Faculty of Science and Engineering |
| Issue: |
1-3 |
| Start Page: |
21 |
| End Page: |
28 |