Current status of extreme environment single crystal neutron diffractometer SENJU, and latest news from JRR-3

単結晶中性子回折計SENJUと研究炉JRR-3の現状

金子 耕士   ; 大原 高志   ; 鬼柳 亮嗣  ; 川崎 卓郎   ; 及川 健一   ; 田村 格良  ; 山内 康弘; 花島 隆泰*; 茂吉 武人*; 中尾 朗子*; 宗像 孝司*; 黒田 哲也*; 野田 幸男; 下条 豊; 大河原 学*; 川名 大地*; 杉浦 良介*; 浅見 俊夫*

Kaneko, Koji; Ohara, Takashi; Kiyanagi, Ryoji; Kawasaki, Takuro; Oikawa, Kenichi; Tamura, Itaru; Yamauchi, Yasuhiro; Hanashima, Takayasu*; Moyoshi, Taketo*; Nakao, Akiko*; Munakata, Koji*; Kuroda, Tetsuya*; Noda, Yukio; Shimojo, Yutaka; Okawara, Manabu*; Kawana, Daichi*; Sugiura, Ryosuke*; Asami, Toshio*

The TOF-Laue single crystal neutron diffractometer, SENJU installed at BL18 in MLF, J-PARC aims at structural studies in extreme sample environments. The instrument is equipped with 36 two-dimensional scintillation detectors arranged cylindrically around the demountable sample chamber, and one additional detector beneath the sample. The standard sample environment in SENJU is standard 4 K CCR, in which the fixed- two-axes goniometers driven by piezo-based motors are attached to the cold finger. This enables us to rotate a sample without moving the cryostat, which helps to reduce background. Since the first beam in 2012, several improvements were achieved, and the system can be steadily used in user programs. In addition to the 4 K CCR, other apparatuses including superconducting magnet were tested and used in the experiment. I will present representative data taken on SENJU, and latest news from the research reactor JRR-3.