论文标题
研究薄铁膜用于超速中子的极化分析
Study of Thin Iron Films for Polarization Analysis of Ultracold Neutrons
论文作者
论文摘要
Tucan（Triumf Ultra-Cold Advanced中子）协作旨在以前所未有的精度寻找中子电动偶极矩（NEDM）。 NEDM测量值的基本要素之一是超速中子（UCN）的极化分析仪，其主要成分是磁化的薄铁膜。几个薄铁膜沉积在铝和硅二元，并以振动磁力测定法和冷中子反射仪为特征。对于铝底物上的那些饱和铁膜所需的磁场为$ \ sim $ 12 ka/m，硅底物为6.4 ka/m。通过中子反射法估计铁膜在Si底物上的磁电势为2 t，这对于NEDM测量的UCN极化分析仪来说是足够的性能。
The TUCAN (TRIUMF Ultra-Cold Advanced Neutron) collaboration aims to search for the neutron electric dipole moment (nEDM) with unprecedented precision. One of the essential elements for the nEDM measurement is a polarization analyzer of ultracold neutrons (UCNs), whose main component is a magnetized thin iron film. Several thin iron films were deposited on aluminum and silicon ubstrates and were characterized by vibrating sample magnetometry and cold-neutron reflectometry. A magnetic field required to saturate the iron film is $\sim$12 kA/m for those on the aluminum substrates and 6.4 kA/m for the silicon substrates. The magnetic potential of the iron films on the Si substrate was estimated to be 2 T by the neutron reflectometry, which is sufficient performance for an UCN polarization analyzer of the nEDM measurement.
