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Effects of Extreme Magnetic Quadrupole Fields on Penning Traps and the Consequences for Antihydrogen Trapping / J Fajans, W Bertsche, K Burke, S Chapman, D. van der Werf, Dirk van der Werf

Physical Review Letters, Volume: 95, Issue: 15

Swansea University Author: Dirk van der Werf

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Abstract

Measurements on electrons confined in a Penning trap show that extreme quadrupole fields destroy particle confinement. Much of the particle loss comes from the hitherto unrecognized ballistic transport of particles directly into the wall. The measurements scale to the parameter regime used by ATHENA...

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Published in: Physical Review Letters
ISSN: 0031-9007 1079-7114
Published: 2005
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URI: https://cronfa.swan.ac.uk/Record/cronfa1556
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Abstract: Measurements on electrons confined in a Penning trap show that extreme quadrupole fields destroy particle confinement. Much of the particle loss comes from the hitherto unrecognized ballistic transport of particles directly into the wall. The measurements scale to the parameter regime used by ATHENA and ATRAP to create antihydrogen, and suggest that quadrupoles cannot be used to trap antihydrogen.
Item Description: This paper reports on electron-plasma stability in quadrupolar fields and resolved a longstanding controversy. The results meant that an octupolar magnetic trapping field was chosen for the new ALPHA antihydrogen experiment. Van der Werf initiated the collaboration with Berkeley and was actively involved with the measurements and preparing the manuscript.
College: College of Science
Issue: 15