Characterization of glasses for He neutron spin filter cells

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

Polarized He neutron spin filters are promising neutron polarizers in polarized neutron scattering experiments at facilities with two-dimensional detectors and pulsed neutron source. Although they are now operational at several institutions, it is still desired to be developed. Among required factors for the development, the study on the glasses in the filters is one of the important issues. In this paper, we report our recent investigation on the glass cells such as X-ray diffraction measurements and the measurements of the degree of circular polarization of the transmitted laser light through the glass window in the filter.