Research on glass cells for He neutron spin filters

Sakaguchi, Yoshifumi; Kira, Hiroshi; Oku, Takayuki   ; Shinohara, Takenao   ; Suzuki, Junichi; Sakai, Kenji ; Nakamura, Mitsutaka   ; Suzuya, Kentaro; Aizawa, Kazuya  ; Arai, Masatoshi; Takeda, Masayasu  ; Wakimoto, Shuichi  ; Yamazaki, Dai  ; Koizumi, Satoshi; Endo, Yasuo; Chang, L.-J.; Arimoto, Yasushi*; Ino, Takashi*; Shimizu, Hirohiko*; Kamiyama, Takashi; Oyama, Kenji*; Hiraka, Haruhiro*; Tsutsumi, Kenji*; Yamada, Kazuyoshi*; Ohara, Koji*; Kakurai, Kazuhisa

Polarized He neutron spin filters have attracted much attention because of their available wide energy range for polarizing neutrons and their large solid-angle. To use He neutron spin filters for the experiments, it is necessary to produce glass cells with good quality. For this purpose, we made research on the glass cells from several aspects. Firstly, we investigated on the microscopic structure for several glasses by means of X-ray diffraction measurement and tried to find a good measure of evaluating the quality of the cells in terms of their structure. Secondly, we investigated on the glass window, which the laser beam passes through for optical pumping. Thirdly, the cells should be optimized for the polarized neutron scattering experiments and the background from the cells needs to be evaluated. The scattered intensity from the cell in small-angle neutron scattering will also be presented.