Evaluation of Magnetic Field Vector by Polarization Analysis Using Pulsed Neutrons at HUNS for Magnetic Field Imaging

Magnetic field imaging using polarized pulsed neutrons is attractive technique because it has the capability to visualize spatial distribution of the magnetic field. Analyzing neutron polarization change due to neutron spin rotation result under a magnetic field at each position makes it possible to obtain a spatial distribution of magnetic field. As previous work, One-dimensional polarization analysis setup using pulsed neutrons was established at J-PARC MLF and HUNS. In this paper, we have established three-dimensional polarization analysis setup to deducea magnetic field strength and the directionprecisely and, quantitatively evaluated averaged magnetic field strength and the directioninside a coil by comparing ones calculated by magnetic calculation using FEM and one measured by a hall probe.