Spallation UCN Production for nEDM

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• 作者：Yasuhiro Masuda ; Kichiji Hatanaka ; Sun-Chan Jeong ; Shinsuke Kawasaki ; Ryohei Matsumiya ; Kensaku Matsuta ; Mototsugu Mihara ; Yutaka Watanabe
• 关键词：UCN ; EDM ; superfluid helium
• 刊名：Physics Procedia
• 出版年：2014
• 年：2014
• 卷：51
• 期：Complete
• 页码：89-92
• 全文大小：486 K

文摘

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脳40 渭A and the UCN maximum energy of E_c = 210 neV. The 纬 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.