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Design and performance of a novel low energy multispecies beamline for an antihydrogen experiment

Christopher Baker Orcid Logo, W. Bertsche, A. Capra, C. L. Cesar, Michael Charlton, A. J. Christensen, R. Collister, A. Cridland Mathad, Stefan Eriksson Orcid Logo, A. Evans, N. Evetts, S. Fabbri, J. Fajans, T. Friesen, M. C. Fujiwara, D. R. Gill, P. Grandemange, P. Granum, J. S. Hangst, M. E. Hayden, D. Hodgkinson, Christopher Aled Isaac Orcid Logo, M. A. Johnson Orcid Logo, J. M. Jones, S. A. Jones, A. Khramov, L. Kurchaninov, Niels Madsen Orcid Logo, Daniel Maxwell Orcid Logo, J. T. K. McKenna, S. Menary, T. Momose, P. S. Mullan, J. J. Munich, K. Olchanski, J. Peszka, A. Powell, C. Ø. Rasmussen, R. L. Sacramento, M. Sameed, E. Sarid, D. M. Silveira, C. So, D. M. Starko, G. Stutter, T. D. Tharp, R. I. Thompson, C. Torkzaban, Dirk van der Werf Orcid Logo, J. S. Wurtele, (ALPHA Collaboration), Jack Jones

Physical Review Accelerators and Beams, Volume: 26, Issue: 4

Swansea University Authors: Christopher Baker Orcid Logo, Michael Charlton, Stefan Eriksson Orcid Logo, Christopher Aled Isaac Orcid Logo, Niels Madsen Orcid Logo, Daniel Maxwell Orcid Logo, Dirk van der Werf Orcid Logo, Jack Jones

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Abstract

The ALPHA Collaboration, based at the CERN Antiproton Decelerator, has recently implemented a novel beamline for low energy (≲100  eV) positron and antiproton transport between cylindrical Penning traps that have strong axial magnetic fields. Here, we describe how a combination of semianalytical and...

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Published in: Physical Review Accelerators and Beams
ISSN: 2469-9888
Published: American Physical Society (APS) 2023
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa63230
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Abstract: The ALPHA Collaboration, based at the CERN Antiproton Decelerator, has recently implemented a novel beamline for low energy (≲100  eV) positron and antiproton transport between cylindrical Penning traps that have strong axial magnetic fields. Here, we describe how a combination of semianalytical and numerical calculations was used to optimize the layout and design of this beamline. Using experimental measurements taken during the initial commissioning of the instrument, we evaluate its performance and validate the models used for its development. By combining data from a range of sources, we show that the beamline has a high transfer efficiency and estimate that the percentage of particles captured in the experiments from each bunch is (78±3)% for up to 105 antiprotons and (71±5)% for bunches of up to 107 positrons.
Keywords: Beam Optics, Penning Traps, Low- & intermediate energy accelerators, Nonneutral plasmas
College: Faculty of Science and Engineering
Funders: EPSRC, STFC, Royal Society, Leverhulme Trust
Issue: 4