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Measurements of Penning-Malmberg trap patch potentials and associated performance degradation
,
W. Bertsche,
A. Capra,
C. L. Cesar,
Michael Charlton,
A. Christensen ,
R. Collister,
April Cridland ,
Stefan Eriksson ,
A. Evans,
N. Evetts,
J. Fajans,
T. Friesen,
M. C. Fujiwara,
D. R. Gill,
P. Grandemange,
P. Granum,
J. S. Hangst,
M. E. Hayden,
D. Hodgkinson,
E. D. Hunter,
Christopher Aled Isaac ,
M. A. Johnson,
Jack Jones,
S. A. Jones,
S. Jonsell,
A. Khramov,
L. Kurchaninov,
H. Landsberger,
Niels Madsen ,
Daniel Maxwell ,
J. T. K. McKenna,
S. Menary,
T. Momose,
Patrick Mullan,
J. J. Munich,
K. Olchanski,
A. Olin,
JOANNA PESZKA,
A. Powell,
P. Pusa,
C.Ø. Rasmussen,
F. Robicheaux,
R. L. Sacramento,
M. Sameed,
E. Sarid,
D. M. Silveira,
C. So,
G. Stutter,
T. D. Tharp,
R. I. Thompson,
C. Torkzaban,
Dirk van der Werf ,
E. Ward,
J. S. Wurtele,
(ALPHA Collaboration)
Physical Review Research, Volume: 6, Issue: 1
Swansea University Authors:
Christopher Baker , Michael Charlton, April Cridland , Stefan Eriksson , Christopher Aled Isaac , Jack Jones, Niels Madsen , Daniel Maxwell , Patrick Mullan, JOANNA PESZKA, Dirk van der Werf
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DOI (Published version): 10.1103/physrevresearch.6.l012008
Abstract
Antiprotons created by laser ionization of antihydrogen are observed to rapidly escape the ALPHA trap. Further, positron plasmas heat more quickly after the trap is illuminated by laser light for several hours. These phenomena can be caused by patch potentials—variations in the electrical potential...
| Published in: | Physical Review Research |
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| ISSN: | 2643-1564 |
| Published: |
American Physical Society (APS)
2024
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa65508 |
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| Abstract: |
Antiprotons created by laser ionization of antihydrogen are observed to rapidly escape the ALPHA trap. Further, positron plasmas heat more quickly after the trap is illuminated by laser light for several hours. These phenomena can be caused by patch potentials—variations in the electrical potential along metal surfaces. A simple model of the effects of patch potentials explains the particle loss, and an experimental technique using trapped electrons is developed for measuring the electric field produced by the patch potentials. The model is validated by controlled experiments and simulations. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
EPSRC |
| Issue: |
1 |