Development of a method to focus a polychromatic neutron beam with a multiple magnet.

低能中子由于其独特的特性，在材料和生命科学研究中是一个有价值的探测器：它深入到材料中，它可以获得关于轻元素、同位素原子和磁矩的信息。为了提高中子的利用效率，研制了一种多磁铁聚焦多色中子束，并考虑了它在J-PARC中的应用。

The low-energy neutron is a valuable probe in research in materials and life science owing to its unique characteristics : it penetrates deeply into a material, it picks up information on light elements, isotopic atoms and magnetic moments. In order to increase the utilization efficiency of neutrons, a multiple magnet to focus a polychromatic neutron beam was developed and its application to the J-PARC was considered.