近赤外吸収イメージング法を用いた微小磁性球の発熱量推定と磁場強度分布の評価

抄録

This paper presents a determination method of heat production rates in a 1-mm-diameter magnetic sphere at different positions in a magnetic field. In this method, three-dimensional radial temperature distributions of water around the sphere were obtained by the inverse Abel transform of two-dimensional radial profiles in absorption images at a wavelength of 1150 nm, at which the absorption coefficient of water depends on temperature. Through minimizing the residuals between the measured temperature distributions and the numerical solutions of thermal conduction equation, heat production rates were determined. Finally, a two-dimensional map of the heat production rates, corresponding to the distribution of magnetic field intensity, was constructed and discussed.