论文标题
实现仪器PF1B的高级超级固态中子偏振器在laue-langevin研究所
Realization of an advanced super-mirror solid-state neutron polarizer for the instrument PF1B at the Institut Laue-Langevin
论文作者
论文摘要
在有关高级固态中子偏光层开发的三篇论文中的最后一系列论文中，我们介绍了偏光层的最终结构及其调试结果。偏振器使用覆盖有偏振超晶状体的界面对中子的自旋选择反射。偏振器完全是为PF1B冷束机构的内部内部建造的。它已安装在PF1B腔室中，并在实际条件下进行了测试。 “良好”自旋组件的平均传输量> 30％。对于中子束中的全角差异，由H113中子指南传递的全角差异和全波长lambda为0.3-2.0 nm的全角差异达到了PN〜0.997的记录值。这种前所未有的性能归因于以下域中设计和制造的一系列创新：基板材料的选择，超级摩尔和反射多层涂料，磁化场，组装过程。自2020年最后一个反应堆周期以来，偏振器用于PF1B的用户实验。
In this last of a series of three papers on the development of an advanced solid-state neutron polarizer, we present the final construction of the polarizer and the results of its commissioning. The polarizer uses spin-selective reflection of neutrons by interfaces coated with polarizing super-mirrors. The polarizer is built entirely in-house for the PF1B cold neutron beam facility at the Institut Max von Laue - Paul Langevin (ILL). It has been installed in the PF1B casemate and tested at real conditions. The average transmission for the "good" spin component is measured to be >30 %. The polarization averaged over the capture spectrum reaches a record value of Pn ~ 0.997 for the full angular divergence in the neutron beam, delivered by the H113 neutron guide, and the full wavelength band lambda of 0.3-2.0 nm. This unprecedented performance is due to a series of innovations in the design and fabrication in the following domains: choice of the substrate material, super-mirror and anti-reflecting multilayer coatings, magnetizing field, assembling process. The polarizer is used for user experiments at PF1B since the last reactor cycle in 2020.
