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Shin, Yun Chang
액시온 및 극한상호작용 연구단
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Compact ultracold neutron source concept for low-energy accelerator-driven neutron sources

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Title
Compact ultracold neutron source concept for low-energy accelerator-driven neutron sources
Author(s)
Yun Chang Shin; Snow, W. Michael; Baxter, David V.; Liu, Chen-Yu; Dongok Kim; Younggeun Kim; Yannis K. Semertzidis
Publication Date
2021-08
Journal
European Physical Journal Plus, v.136, no.8
Publisher
Springer Science and Business Media Deutschland GmbH
Abstract
© 2021, The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.The concept of a small-scale, pulsed-proton accelerator-based compact ultracold neutron (UCN) source is presented. The essential idea of the compact UCN source is to enclose a volume of superfluid 4He converter with a supercold moderator in the vicinity of a low-radiation neutron production target from (p, n) reactions. The supercold moderator should possess an ability to produce cold neutron flux with a peak brightness near the single-phonon excitation band of the superfluid 4He converter, thereby augmenting the UCN production in the compact UCN source even with very low intensity of neutron brightness. The performance of the compact UCN source is studied in terms of the UCN production and thermal load in the UCN converter. With the proposed concept of the compact UCN source, a UCN production rate of PUCN=80UCN/cm3/s in the UCN converter could be obtained while maintaining thermal load of the superfluid 4He and its container at a level of 22mW. This study shows that the compact UCN source can produce a high enough density of UCNs at a small-scale, low-energy, pulsed-proton beam facility with reduced efforts on the cooling and radiation protection.
URI
https://pr.ibs.re.kr/handle/8788114/10224
DOI
10.1140/epjp/s13360-021-01740-1
ISSN
2190-5444
Appears in Collections:
Center for Axion and Precision Physics Research(액시온 및 극한상호작용 연구단) > 1. Journal Papers (저널논문)
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