SENJU; A New time-of-flight single crystal neutron diffractometer at J-PARC

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

SENJU is a new single crystal diffractometer for spallation neutron source in Materials and Life Science Experimental Facility (MLF) at Japan Photon Accelerator Research Complex (J-PARC). It is currently under construction and is scheduled to be complete by spring 2011. The diffractometer is esigned to perform diffraction experiment under various environmental conditions, and the crystal and magnetic structure of materials whose lattice constants up to 50 will be studied. SENJU also shed light on the superlattice reflection or diffuse scattering in the reciprocal lattice space to analyze the local structures as well as phase transitions of the materials. At the beginning, the diffractometer will have 31 two-dimensional scintillation detectors to observe the wide area of reciprocal lattice space by one measurement. Various sample environments will be provided, such as cryogenic cooling and magnetic field.