High pressure neutron diffractometer "PLANET" at J-PARC

Sano, Asami   ; Hattori, Takanori   ; Arima, Hiroshi*; Utsumi, Wataru; Katayama, Yoshinori; Nagai, Takaya*; Inoue, Toru*; Kagi, Hiroyuki*; Yagi, Takehiko*

High-pressure neutron diffractometer named "PLANET" is constructed at BL11 of Materials and Life Science Experimental Facility (MLF), spallation neutron source in Japan Proton Accelerator Research Complex (J-PARC). Using the features of neutron scattering that differs from X-ray, the beamline will provide new information not only about hydrogen in minerals, but also order-disorder transition and magnetic structures of minerals. A feature of the beamline is that 6-ram multi anvil press (named "ATSUHIME") is installed to generate high pressure and high temperature. The 6-rams press is suitable for neutron diffraction experiment because it has a wide window for detector coverage compared to other multi anvil press using guide block. Six hydraulic rams are operated by independent plunger pump to achieve highly synchronized compression of the sample assembly. In the talk, I will present the detail design of PLANET and its performance that is demonstrated through the commissioning.