Construction of new time-of-flight single crystal diffractometer SENJU at J-PARC

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

A new time-of-flight single crystal diffractometer, SENJU, is being constructed in Materials and Life Science Experimental Facility (MLF) at Japan Proton Accelerator Research Complex (J-PARC). This instrument aims to pursue precise crystal and magnetic structure analyses of the small samples with the lattice constants up to 50. Available sample environments will include low temperature, high magnetic field and high pressure. A superconducting magnet has a wide opening angle for diffracted neutrons and a large bore around sample area. A dilution refrigerator ( 50 mK) can be mounted onto the magnet. Other ancillary equipment can be also utilized in combination with another. Softwares were also developed based on the software "STARGazer" that has been developed for iBIX at J-PARC. New features such as controlling goniometers and ancillary equipment, live-monitoring of measurements and the reconstruction of a intensity distribution in 3D reciprocal space were introduced.