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Leite, A. M. M.ORCID iD iconorcid.org/0000-0003-2389-3078
Publications (2 of 2) Show all publications
Niang, S., Charlton, M., Choi, J. J., Chung, M., Clade, P., Comini, P., . . . Baker, C. J. (2020). Accumulation of Positrons from a LINAC Based Source. Acta Physica Polonica. A, 137(2), 164-166
Open this publication in new window or tab >>Accumulation of Positrons from a LINAC Based Source
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2020 (English)In: Acta Physica Polonica. A, ISSN 0587-4246, E-ISSN 1898-794X, Vol. 137, no 2, p. 164-166Article in journal (Refereed) Published
Abstract [en]

The GBAR experiment aims to measure the gravitational acceleration of antihydrogen (H) over bar. It will use (H) over bar (+) ions formed by the interaction of antiprotons with a dense positronium cloud, which will require about 1010 positrons to produce one (H) over bar (+). We present the first results on the positron accumulation, reaching 3.8 +/- 0.4x10(8) e(+) collected in 560 s.
National Category
Physical Sciences
Identifiers
urn:nbn:se:su:diva-181978 (URN)10.12693/APhysPolA.137.164 (DOI)000529332100022 ()2-s2.0-85083848798 (Scopus ID)
Available from: 2020-06-03 Created: 2020-06-03 Last updated: 2022-11-07Bibliographically approved
Kim, B. H., Choi, J. J., Chung, M., Clade, P., Comini, P., Crivelli, P., . . . Yoo, K.-H. (2020). Development of a PbWO4 Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment. Acta Physica Polonica. A, 137(2), 122-125
Open this publication in new window or tab >>Development of a PbWO4 Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment
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2020 (English)In: Acta Physica Polonica. A, ISSN 0587-4246, E-ISSN 1898-794X, Vol. 137, no 2, p. 122-125Article in journal (Refereed) Published
Abstract [en]

We have developed a PbWO4 (PWO) detector with a large dynamic range to measure the intensity of a positron beam and the absolute density of the ortho-positronium (o-Ps) cloud it creates. A simulation study shows that a setup based on such detectors may be used to determine the angular distribution of the emission and reflection of o-Ps to reduce part of the uncertainties of the measurement. These will allow to improve the precision in the measurement of the cross-section for the (anti)hydrogen formation by (anti)proton-positronium charge exchange and to optimize the yield of antihydrogen ion which is an essential parameter in the GBAR experiment.
National Category
Physical Sciences
Identifiers
urn:nbn:se:su:diva-181977 (URN)10.12693/APhysPolA.137.122 (DOI)000529332100011 ()2-s2.0-85083860780 (Scopus ID)
Available from: 2020-05-28 Created: 2020-05-28 Last updated: 2022-11-08Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-2389-3078

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