GINA -布达佩斯中子中心的极化中子反射计
GINA - A Polarized Neutron Reflectometer at the Budapest Neutron Centre
摘要：
介绍了布达佩斯中子中心最近安装的掠入射中子装置GINA的结构、性能和工作参数。GINA是一种舞池型、恒定能量、角色散反射计，配备了一个2D位置敏感探测器，用于研究镜面和离镜面散射。非极化和极化中子的波长选择在3.2和5.7 nm之间。自旋极化和分析是通过磁化透射超镜和射频绝热自旋翻转器实现的。由于五元素（热解石墨）单色仪的垂直聚焦，来自20 × 20 mm样品的反射强度加倍。GINA致力于磁性薄膜和异质结构的研究，但也提供非磁性薄膜，膜和其他表面的非极化选择。启动后不久，在仪器上测得的反射率值低至3x 10 -5。该设施目前已向国际用户开放，但其开发工作仍在继续，主要是确定新的样品环境选择、非镜面散射辐射的自旋分析和进一步降低本底。
英文摘要：
The setup, capabilities and operation parameters of the neutron reflectometer GINA, the recently installed "Grazing Incidence Neutron Apparatus" at the Budapest Neutron Centre, are introduced. GINA, a dance-floor-type, constant-energy, angle-dispersive reflectometer is equipped with a 2D position-sensitive detector to study specular and off-specular scattering. Wavelength options between 3.2 and 5.7 Å are available for unpolarized and polarized neutrons. Spin polarization and analysis are achieved by magnetized transmission supermirrors and radio-frequency adiabatic spin flippers. As a result of vertical focusing by the five-element (pyrolytic graphite) monochromator the reflected intensity from a 20x20 mm sample has doubled. GINA is dedicated to studies of magnetic films and heterostructures, but unpolarized options for non-magnetic films, membranes and other surfaces are also provided. Shortly after its startup, reflectivity values as low as 3x10-5 have been measured on the instrument. The facility is now open for the international user community, but its development is continuing mainly to establish new sample environment options, the spin analysis of off-specularly scattered radiation and further decrease of the background.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
