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When particles in a Penning trap are subject to a magnetic multipole field, those beyond a critical radius will be lost. The critical radius depends on the history by which the field is applied, and c...

A novel antiproton radial diagnostic based on octupole induced ballistic loss

Phys. Plasmas 15, 032107 (2008); doi:10.1063/1.2899305

Published 31 March 2008

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G. B. Andresen,1 W. Bertsche,2 P. D. Bowe,1 C. C. Bray,3 E. Butler,2 C. L. Cesar,4 S. Chapman,3 M. Charlton,2 J. Fajans,3 M. C. Fujiwara,5 R. Funakoshi,6 D. R. Gill,5 J. S. Hangst,1 W. N. Hardy,7 R. S. Hayano,6 M. E. Hayden,8 A. J. Humphries,2 R. Hydomako,9 M. J. Jenkins,2 L. V. Jørgensen,2 L. Kurchaninov,5 R. Lambo,4 N. Madsen,2 P. Nolan,10 K. Olchanski,5 A. Olin,5 R. D. Page,10 A. Povilus,3 P. Pusa,10 F. Robicheaux,11 E. Sarid,12 S. Seif El Nasr,7 D. M. Silveira,4 J. W. Storey,5 R. I. Thompson,9 D. P. van der Werf,2 J. S. Wurtele,3 and Y. Yamazaki13
1Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
2Department of Physics, Swansea University, Swansea SA2 8PP, United Kingdom
3Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, USA
4Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-972, Brazil
5TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
6Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
7Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
8Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
9Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada
10Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
11Department of Physics, Auburn University, Auburn, Alabama 36849-5311, USA
12Department of Physics, NRCN-Nuclear Research Center Negev, Beer Sheva IL-84190, Israel
13Atomic Physics Laboratory, RIKEN, Saitama 351-0198, Japan
We report results from a novel diagnostic that probes the outer radial profile of trapped antiproton clouds. The diagnostic allows us to determine the profile by monitoring the time history of antiproton losses that occur as an octupole field in the antiproton confinement region is increased. We show several examples of how this diagnostic helps us to understand the radial dynamics of antiprotons in normal and nested Penning–Malmberg traps. Better understanding of these dynamics may aid current attempts to trap antihydrogen atoms. ©2008 American Institute of Physics
History: Received 25 January 2008; accepted 28 February 2008; published 31 March 2008
Permalink: http://link.aip.org/link/?PHPAEN/15/032107/1
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KEYWORDS and PACS

Keywords
PACS
  • 37.10.Gh
    Atom traps and guides
  • 29.40.-n
    Radiation detectors
  • 36.10.Gv
    Mesonic, hyperonic and antiprotonic atoms and molecules
  • YEAR: 2008

PUBLICATION DATA

ISSN:
1070-664X (print)   1089-7674 (online)
Publisher:
AIP is a member of CrossRef AIP

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