Magnetic field imaging using pulsed polarized neutrons

偏極パルス中性子を利用した磁場イメージング

篠原 武尚   ; 廣井 孝介  ; 林田 洋寿*; Su, Y. H.  ; 甲斐 哲也   ; Parker, J. D.*; Sales, M.*; Strobl, M.*; Schmidt, S.*; 鬼柳 善明*

Shinohara, Takenao; Hiroi, Kosuke; Hayashida, Hirotoshi*; Su, Y. H.; Kai, Tetsuya; Parker, J. D.*; Sales, M.*; Strobl, M.*; Schmidt, S.*; Kiyanagi, Yoshiaki*

Magnetic field imaging using polarized neutrons is an attractive technique for neutron imaging due to its capability to study magnetic field distributions not only in free space but also inside bulk materials. The use of a pulsed neutron beam with the polarization imaging technique allows us to analyze the wavelength dependent polarization efficiently and precisely and enables us to evaluate accumulated field strength along the beam trajectory. Recently, we have constructed a 3D polarization analysis apparatus at the RADEN beam line of the J-PARC Materials and Life Science Experimental Facility, which is the world's first dedicated pulsed neutron imaging instrument. In this presentation, we will introduce our pulsed polarized neutron imaging technique and show results of recent application studies and technical development.