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Compression of positron clouds using rotating wall electric fields

Dirk Peter Werf, Christopher Aled Isaac, Christopher John Baker, Timothy Mortensen, Michael Charlton, Dirk van der Werf Orcid Logo, Aled Isaac Orcid Logo

Hyperfine Interactions, Volume: 212, Issue: 1-3, Pages: 125 - 132

Swansea University Authors: Dirk van der Werf Orcid Logo, Aled Isaac Orcid Logo

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DOI (Published version): 10.1007/s10751-011-0384-7

Abstract

An asymmetric dipolar rotating electric field can be used to compress a trapped cloud of positrons when applied with a frequency close that of their axial bounce, and in the presence of a low pressure molecular gas to provide cooling. Measurements of the compression rate and associated parameters ar...

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Published in: Hyperfine Interactions
ISSN: 0304-3843 1572-9540
Published: 2012
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URI: https://cronfa.swan.ac.uk/Record/cronfa13702
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spelling 2011-10-01T00:00:00.0000000 v2 13702 2012-12-16 Compression of positron clouds using rotating wall electric fields 4a4149ebce588e432f310f4ab44dd82a 0000-0001-5436-5214 Dirk van der Werf Dirk van der Werf true false 06d7ed42719ef7bb697cf780c63e26f0 0000-0002-7813-1903 Aled Isaac Aled Isaac true false 2012-12-16 SPH An asymmetric dipolar rotating electric field can be used to compress a trapped cloud of positrons when applied with a frequency close that of their axial bounce, and in the presence of a low pressure molecular gas to provide cooling. Measurements of the compression rate and associated parameters are presented and compared with results of a theory we have developed. The latter treats positron behaviour in a perfect Penning trap potential, in the presence of the rotating field, with the cooling modelled in the Stokes viscous drag approximation. Good agreement between the theory and experiment has been found, which has allowed us to identify the phenomenon as a new form of sideband cooling. Journal Article Hyperfine Interactions 212 1-3 125 132 0304-3843 1572-9540 31 12 2012 2012-12-31 10.1007/s10751-011-0384-7 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2011-10-01T00:00:00.0000000 2012-12-16T17:36:06.9789104 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Dirk Peter Werf 1 Christopher Aled Isaac 2 Christopher John Baker 3 Timothy Mortensen 4 Michael Charlton 5 Dirk van der Werf 0000-0001-5436-5214 6 Aled Isaac 0000-0002-7813-1903 7
title Compression of positron clouds using rotating wall electric fields
spellingShingle Compression of positron clouds using rotating wall electric fields
Dirk van der Werf
Aled Isaac
title_short Compression of positron clouds using rotating wall electric fields
title_full Compression of positron clouds using rotating wall electric fields
title_fullStr Compression of positron clouds using rotating wall electric fields
title_full_unstemmed Compression of positron clouds using rotating wall electric fields
title_sort Compression of positron clouds using rotating wall electric fields
author_id_str_mv 4a4149ebce588e432f310f4ab44dd82a
06d7ed42719ef7bb697cf780c63e26f0
author_id_fullname_str_mv 4a4149ebce588e432f310f4ab44dd82a_***_Dirk van der Werf
06d7ed42719ef7bb697cf780c63e26f0_***_Aled Isaac
author Dirk van der Werf
Aled Isaac
author2 Dirk Peter Werf
Christopher Aled Isaac
Christopher John Baker
Timothy Mortensen
Michael Charlton
Dirk van der Werf
Aled Isaac
format Journal article
container_title Hyperfine Interactions
container_volume 212
container_issue 1-3
container_start_page 125
publishDate 2012
institution Swansea University
issn 0304-3843
1572-9540
doi_str_mv 10.1007/s10751-011-0384-7
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description An asymmetric dipolar rotating electric field can be used to compress a trapped cloud of positrons when applied with a frequency close that of their axial bounce, and in the presence of a low pressure molecular gas to provide cooling. Measurements of the compression rate and associated parameters are presented and compared with results of a theory we have developed. The latter treats positron behaviour in a perfect Penning trap potential, in the presence of the rotating field, with the cooling modelled in the Stokes viscous drag approximation. Good agreement between the theory and experiment has been found, which has allowed us to identify the phenomenon as a new form of sideband cooling.
published_date 2012-12-31T03:15:39Z
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score 11.013015

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