Details

Autor(en) / Beteiligte

• Xu, Q
• Sato, K
• Yoshiie, T
• Sano, T
• Kawabe, H
• Nagai, Y
• Nagumo, K
• Inoue, K
• Toyama, T
• Oshima, N
• Kinomura, A
• Shirai, Y

Titel

Positron beam facility at Kyoto University Research Reactor

Ist Teil von

• Journal of physics. Conference series, 2014-04, Vol.505 (1), p.12030-5

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2014

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• A positron beam facility is presently under construction at the Kyoto University Research Reactor (KUR), which is a light-water moderated tank-type reactor operated at a rated thermal power of 5 MW. A cadmium (Cd) - tungsten (W) source similar to that used in NEPOMUC was chosen in the KUR because Cd is very efficient at producing γ-rays when exposed to thermal neutron flux, and W is a widely used in converter and moderator materials. High-energy positrons are moderated by a W moderator with a mesh structure. Electrical lenses and a solenoid magnetic field are used to extract the moderated positrons and guide them to a platform outside of the reactor, respectively. Since Japan is an earthquake-prone country, a special attention is paid for the design of the in-pile positron source so as not to damage the reactor in the severe earthquake.