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The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields / Michael, Charlton; Dirk, van der Werf; Christopher, Baker; Aled, Isaac

New Journal of Physics, Volume: 14, Issue: 7, Start page: 075022

Swansesa University Authors: Michael, Charlton, Dirk, van der Werf, Christopher, Baker, Aled, Isaac

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Abstract

Positron clouds are compressed following accumulation in a Surkotype two-stage buffer gas trap using an asymmetric rotating wall electric field. An analytic theory used to describe measurements of the rate of compression is discussed. Furthermore, we describe measurements taken without the rotating...

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Published in: New Journal of Physics
ISSN: 1367-2630
Published: 2012
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URI: https://cronfa.swan.ac.uk/Record/cronfa13706
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first_indexed 2013-07-23T12:10:43Z
last_indexed 2018-02-09T04:44:34Z
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spelling 2011-10-01T00:00:00.0000000 v2 13706 2012-12-16 The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields d9099cdd0f182eb9a1c8fc36ed94f53f Michael Charlton Michael Charlton true false 4a4149ebce588e432f310f4ab44dd82a 0000-0001-5436-5214 Dirk van der Werf Dirk van der Werf true false 0c72afb63bd0c6089fc5b60bd096103e 0000-0002-9448-8419 Christopher Baker Christopher Baker true false 06d7ed42719ef7bb697cf780c63e26f0 0000-0002-7813-1903 Aled Isaac Aled Isaac true false 2012-12-16 SPH Positron clouds are compressed following accumulation in a Surkotype two-stage buffer gas trap using an asymmetric rotating wall electric field. An analytic theory used to describe measurements of the rate of compression is discussed. Furthermore, we describe measurements taken without the rotating wall applied and with the rotating wall compression present during accumulation of the positron cloud. This has enabled total loss rates for the positrons via annihilation and collisional-induced radial transport to be isolated, with the latter mechanism found to be dominant. We have shown that the application of the rotating wall at a resonant frequency virtually eliminates radial transport, such that the positron loss is caused by annihilation in the gas. Journal Article New Journal of Physics 14 7 075022 1367-2630 31 12 2012 2012-12-31 10.1088/1367-2630/14/7/075022 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2011-10-01T00:00:00.0000000 2012-12-16T17:51:17.3558837 College of Science Physics D P van der Werf 1 C A Isaac 2 C J Baker 3 T Mortensen 4 S J Kerrigan 5 M Charlton 6 Michael Charlton 7 Dirk van der Werf 0000-0001-5436-5214 8 Christopher Baker 0000-0002-9448-8419 9 Aled Isaac 0000-0002-7813-1903 10
title The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields
spellingShingle The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields
Michael, Charlton
Dirk, van der Werf
Christopher, Baker
Aled, Isaac
title_short The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields
title_full The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields
title_fullStr The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields
title_full_unstemmed The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields
title_sort The behaviour of positron clouds in the single-particle regime under the influence of rotating wall electric fields
author_id_str_mv d9099cdd0f182eb9a1c8fc36ed94f53f
4a4149ebce588e432f310f4ab44dd82a
0c72afb63bd0c6089fc5b60bd096103e
06d7ed42719ef7bb697cf780c63e26f0
author_id_fullname_str_mv d9099cdd0f182eb9a1c8fc36ed94f53f_***_Michael, Charlton
4a4149ebce588e432f310f4ab44dd82a_***_Dirk, van der Werf
0c72afb63bd0c6089fc5b60bd096103e_***_Christopher, Baker
06d7ed42719ef7bb697cf780c63e26f0_***_Aled, Isaac
author Michael, Charlton
Dirk, van der Werf
Christopher, Baker
Aled, Isaac
format Journal article
container_title New Journal of Physics
container_volume 14
container_issue 7
container_start_page 075022
publishDate 2012
institution Swansea University
issn 1367-2630
doi_str_mv 10.1088/1367-2630/14/7/075022
college_str College of Science
hierarchytype
hierarchy_top_id collegeofscience
hierarchy_top_title College of Science
hierarchy_parent_id collegeofscience
hierarchy_parent_title College of Science
department_str Physics{{{_:::_}}}College of Science{{{_:::_}}}Physics
document_store_str 0
active_str 0
description Positron clouds are compressed following accumulation in a Surkotype two-stage buffer gas trap using an asymmetric rotating wall electric field. An analytic theory used to describe measurements of the rate of compression is discussed. Furthermore, we describe measurements taken without the rotating wall applied and with the rotating wall compression present during accumulation of the positron cloud. This has enabled total loss rates for the positrons via annihilation and collisional-induced radial transport to be isolated, with the latter mechanism found to be dominant. We have shown that the application of the rotating wall at a resonant frequency virtually eliminates radial transport, such that the positron loss is caused by annihilation in the gas.
published_date 2012-12-31T03:23:28Z
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score 10.900106