2005 Annual report of MEXT specially promoted research, "Development of the 4D space access neutron spectrometer (4SEASONS) and elucidation of the mechanism of oxide high- superconductivity"

Arai, Masatoshi; Yokoo, Tetsuya*; Kajimoto, Ryoichi  ; Nakajima, Kenji  ; Shamoto, Shinichi  ; Yamada, Kazuyoshi*; Fujita, Masaki*; Ino, Takashi*; Soyama, Kazuhiko  ; Nakamura, Mitsutaka   ; Aizawa, Kazuya  ; Oyama, Kenji*; Hiraka, Haruhiro*; Asaoka, Hidehito  ; Kodama, Katsuaki   ; Inamura, Yasuhiro; Imai, Yoshinori

A research project entitled "Development of the 4D Space Access Neutron Spectrometer (4SEASONS) and Elucidation of the Mechanism of Oxide High- Superconductivity" has started in 2005 (repr. by M. Arai). It is supported by MEXT, Grant-in-Aid for Specially Promoted Research and is going to last until fiscal 2009. The goal of the project is to elucidate the mechanism of oxide high- superconductivity by neutron scattering technique. For this purpose, we will develop an inelastic neutron scattering instrument 4SEASONS (4d SpacE AccesS neutrON Spectrometer) for the spallation neutron source in Japan Proton Accelerator Research Complex (J-PARC). The instrument will have 100 times higher performance than existing world-class instruments, and will enable detailed observation of anomalous magnetic excitations and phonons in a four-dimensional momentum-energy space. This report summarizes the progress in the research project in fiscal 2007.