Enhancement of TOF diffractometer Sirius with 90� detector bank

A TOF powder diffractometer, Sirius, installed at the Neutron Science Laboratory (KENS) of the High Energy Accelerator Research Organization (KEK), has realized both high resolution and high intensity with its large backward detector bank together with supermirror guide. Sirius also has a large 90° detector bank (0.54 str), which is used for diffraction studies under special environments, such as high pressure, high temperature, and so on. Recent works using a high-pressure cell (Prris–Edinburgh cell) and a high-temperature furnace with a gas-control device (modeled on the Miller Furnace at IPNS) are presented.