Polarization analysis for magnetic field imaging at RADEN in J-PARC/MLF

International Conference on Polarised Neutrons for Condensed Matter Investigations

Shinohara, Takenao^1 ; Hiroi, Kosuke^1 ; Su, Yuhua^1 ; Kai, Tetsuya^1 ; Nakatani, Takeshi^1 ; Oikawa, Kenichi^1 ; Segawa, Mariko^1 ; Hayashida, Hirotoshi^2 ; Parker, Joseph D.^2 ; Matsumoto, Yoshihiro^2 ; Zhang, Shuoyuan^2 ; Kiyanagi, Yoshiaki^3

J-PARC Center, Japan Atomic Energy Agency, Ibaraki-Tokai

319-1195, Japan^1

Comprehensive Research Organization for Science and Society, Ibaraki-Tokai

319-1106, Japan^2

Nagoya University, Chikusa-ku, Aichi, Nagoya

464-8601, Japan^3

关键词: Experimental facilities;    Imaging instruments;    Magnetic field imaging;    Polarization analysis;    Polarization distributions;    Polarization vectors;    Pulsed neutron beams;    Quantitative evaluation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/862/1/012025/pdf
DOI  :  10.1088/1742-6596/862/1/012025

来源: IOP

【 摘 要 】

Polarized neutron imaging is an attractive method for visualizing magnetic fields in a bulk object or in free space. In this technique polarization of neutrons transmitted through a sample is analyzed position by position to produce an image of the polarization distribution. In particular, the combination of three-dimensional spin analysis and the use of a pulsed neutron beam is very effective for the quantitative evaluation of both field strength and direction by means of the analysis of the wavelength dependent polarization vector. Recently a new imaging instrument "RADEN" has been constructed at the beam line of BL22 of the Materials and Life Science Experimental Facility (MLF) at J-PARC, which is dedicated to energy-resolved neutron imaging experiments. We have designed a polarization analysis apparatus for magnetic field imaging at the RADEN instrument and have evaluated its performance.