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

Refereed Publication

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 semi analytical 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.

Baker, C. J. and Bertsche, W. and Capra, A. and Cesar, C. L. and Charlton, M. and Christensen, A. J. and Collister, R. and Cridland Mathad, A. and Eriksson, S. and Evans, A. and Evetts, N. and Fabbri, S. and Fajans, J. and Friesen, T. and Fujiwara, M. C. and Gill, D. R. and Grandemange, P. and Granum, P. and Hangst, J. S. and Hayden, M. E. and Hodgkinson, D. and Isaac, C. A. and Johnson, M. A. and Jones, J. M. and Jones, S. A. and Khramov, A. and Kurchaninov, L. and Madsen, N. and Maxwell, D. and McKenna, J. T. K. and Menary, S. and Momose, T. and Mullan, P. S. and Munich, J. J. and Olchanski, K. and Peszka, J. and Powell, A. and Rasmussen, C. \O{}. and Sacramento, R. L. and Sameed, M. and Sarid, E. and Silveira, D. M. and So, C. and Starko, D. M. and Stutter, G. and Tharp, T. D. and Thompson, R. I. and Torkzaban, C. and van der Werf, D. P. and Wurtele, J. S.

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