Spallation UCN Production for nEDM

A new superthermal UCN production in He-II, which is placed in a spallation neutron source, is discussed. In the new UCN source, the production rate is expected to be 200 UCN/cm3/s at a proton beam power of 500 MeV×40μA and the UCN maximum energy of Ec = 210 neV. The γ heating in the He-II can be re...

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Bibliographic Details
Published in:Physics procedia 2014, Vol.51, p.89-92
Main Authors: Masuda, Yasuhiro, Hatanaka, Kichiji, Jeong, Sun-Chan, Kawasaki, Shinsuke, Matsumiya, Ryohei, Matsuta, Kensaku, Mihara, Mototsugu, Watanabe, Yutaka
Format: Article
Language:English
Subjects:
EDM
superfluid helium
UCN
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Summary:A new superthermal UCN production in He-II, which is placed in a spallation neutron source, is discussed. In the new UCN source, the production rate is expected to be 200 UCN/cm3/s at a proton beam power of 500 MeV×40μA and the UCN maximum energy of Ec = 210 neV. The γ heating in the He-II can be removed by means of 3He pumping according to calculations. For an EDM measurement, UCN are extracted from a He-II bottle through an aluminum window by using a superconducting magnet. The possibility of a 129Xe magnetometer for the EDM measurement is also discussed.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2013.12.020