A New polarized neutron reflectometer SHARAKU at Material Life Science Facility (MLF) at Japan Proton Accelerator Research Complex (J-PARC)

Takeda, Masayasu  ; Yamazaki, Dai  ; Soyama, Kazuhiko  ; Hayashida, Hirotoshi; To, Kentaro  ; Yamagishi, Hideshi*; Katagiri, Masaki*; Sakasai, Kaoru  ; Maruyama, Ryuji   ; Mizusawa, Tazuko*; Miyata, Noboru*; Sakaguchi, Yoshifumi*; Sato, Junichi*; Kasai, Satoshi*; Kiriyama, Koji*; Kubota, Masato ; Asaoka, Hidehito  ; Akutsu, Kazuhiro*; Aizawa, Kazuya  ; Arai, Masatoshi; Inamura, Yasuhiro  ; Ito, Takayoshi*; Kaneko, Koji   ; Nakamura, Tatsuya  ; Nakatani, Takeshi ; Oikawa, Kenichi   ; Ohara, Takashi   ; Shinohara, Takenao   ; Suzuki, Junichi*; Suzuya, Kentaro; Tamura, Itaru  ; Hirano, Tatsumi*

A new polarized neutron reflectometer (SHARAKU) was installed at the beam line 17 (BL17) of MLF as the second neutron reflectometer in J-PARC. This reflectometer was designed for a variety of surface science applications except the free surface and interface investigation. Therefore, this reflectometer has the capability of performing full polarization analysis, grazing incidence small-angle neutron scattering (GISANS), and the grazing incidence diffraction (GID) measurements. Four kinds of detectors are employed to cover a wide q-range with a proper q-resolution. One is a point detector, and the other three are two-dimensional position-sensitive-detectors. A polarizer and analyzer both of which consist of Fe/Si polarizing supermirrors and two-coil flippers are used for the polarization analysis. We will report the outline design specification, and the basic performance of this new reflectometer.