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Ko, Young Ju
지하실험 연구단
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Positron production using a 9 MeV electron linac for the GBAR experiment

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Title
Positron production using a 9 MeV electron linac for the GBAR experiment
Author(s)
Charlton, M.; Choi, J.J.; Chung, M.; Clade, P.; Comini, P.; Crepin, P.-P.; Crivelli, P.; Dalkarov, O.; Debu, P.; Dodd, L.; Douillet, A.; Guellati-Khelifa, S.; Hervieux, P.-A.; Hilico, L.; Husson, A.; Indelicato, P.; Janka, G.; Jonsell, S.; Karr, J.-P.; Kim, B.H.; Kim, E.-S.; Kim, S.K.; Young Ju Ko; Kosinski, T.; Kuroda, N.; Latacz, B.; Lee, H.; Jaison Lee; Leite, A.M.M.; Leveque, K.; Lim, E.; Liszkay, L.; Lotrus, P.; Louvradoux, T.; Lunney, D.; Manfredi, G.; Mansoulie, B.; Matusiak, M.; Mornacchi, G.; Nesvizhevsky, V.V.; Nez, F.; Niang, S.; Nishi, R.; Nourbaksh, S.; Park, K.H.; Paul, N.; Perez, P.; Procureur, S.; Radics, B.; Regenfus, C.; Rey, J.-M.; Reymond, J.-M.; Reynaud, S.; Rousse, J.-Y.; Rousselle, O.; Rubbia, A.; Rzadkiewicz, J.; Sacquin, Y.; Schmidt-Kaler, F.; Staszczak, M.; Tuchming, B.; Vallage, B.; Voronin, A.; Welker, A.; van, der Werf D.P.; Wolf, S.; Won, D.; Wronka, S.; Yamazaki, Y.; Yoo, K.-H.
Publication Date
2021-01
Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.985
Publisher
ELSEVIER
Abstract
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. Staying below 10 MeV ensures no persistent radioactive activation in the target zone and that the radiation level outside the biological shield is safe for public access. An annealed tungsten-mesh assembly placed directly behind the target acts as a positron moderator. The system produces 5 x 10(7) slow positrons per second, a performance demonstrating that a low-energy electron linac is a superior choice over positron-emitting radioactive sources for high positron flux.
URI
https://pr.ibs.re.kr/handle/8788114/7506
DOI
10.1016/j.nima.2020.164657
ISSN
0168-9002
Appears in Collections:
Center for Underground Physics(지하실험 연구단) > 1. Journal Papers (저널논문)
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