Current status of a time-of-flight single crystal neutron diffractometer SENJU at J-PARC

単結晶中性子回折装置SENJUの現状

田村 格良  ; 及川 健一   ; 川崎 卓郎   ; 大原 高志   ; 金子 耕士   ; 鬼柳 亮嗣  ; 木村 宏之*; 高橋 美和子; 清谷 多美子*; 新井 正敏; 野田 幸男*; 大嶋 建一*

Tamura, Itaru; Oikawa, Kenichi; Kawasaki, Takuro; Ohara, Takashi; Kaneko, Koji; Kiyanagi, Ryoji; Kimura, Hiroyuki*; Takahashi, Miwako; Kiyotani, Tamiko*; Arai, Masatoshi; Noda, Yukio*; Oshima, Kenichi*

SENJU is a state-of-the-art single crystal time-of-flight Laue diffractometer in Materials and Life Science Experimental Facility at Japan Proton Accelerator Research Complex (J-PARC). The diffractometer is designed for precise crystal and magnetic structure analyses under multiple extreme conditions, such as low temperature, high-pressure, high-magnetic field. A measurement using small sample less than 1.0 mm will be also realized, which allows us to study wide variety of materials. SENJU is aimed at a poisoned decoupled moderator to obtain peak profiles of Bragg reflection, and intensity distributions of superlattice reflections and diffuse scatterings with good accuracy. At the beginning, the diffractometer will have 31 two-dimensional scintillator detectors to cover wide area of reciprocal lattice space by a single measurement. The instrument is currently under construction and is scheduled to start on-beam commissioning by the end of 2011.