The Development of the He spin filter for the time reversal violation search using compound nuclei at JAEA

Okudaira, Takuya; Oku, Takayuki   ; Sakai, Kenji ; Ino, Takashi*; Hayashida, Hirotoshi*; Hiroi, Kosuke  ; Shinohara, Takenao   ; Kakurai, Kazuhisa*; Aizawa, Kazuya  ; Shimizu, Hirohiko*; Kitaguchi, Masaaki*; Yamamoto, Tomoki*; Sato, Takumi*

The technology development section carries out the development of the neutron polarization device: He Spin Filter. Since this device is often used for the fundamental physics region, it is important to cooperate with scientists in this region for further development. In order to explain the matter-dominated universe, a time reversal violation is necessary and searches for new physics are conducted in the world. The T-violation search experiment using a polarized neutron beam is planned at J-PARC. A large He spin filter is needed to polarize epi-thermal neutron for the experiment and is developed in JAEA. Recently, user's experiments for the T-violation search using He spin filter were conducted. The current status of the development of the He spin filter and feature plan will be presented.