Syed Mohd A, Pütter S, Mattauch S, Koutsioubas A, Schneider H, Weber A, Brückel T
Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85747 Garching, Germany.
Rev Sci Instrum. 2016 Dec;87(12):123909. doi: 10.1063/1.4972993.
We report on a versatile mini ultra-high vacuum (UHV) chamber which is designed to be used on the MAgnetic Reflectometer with high Incident Angle of the Jülich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum in Garching, Germany. Samples are prepared in the adjacent thin film laboratory by molecular beam epitaxy and moved into the compact chamber for transfer without exposure to ambient air. The chamber is based on DN 40 CF flanges and equipped with sapphire view ports, a small getter pump, and a wobble stick, which serves also as sample holder. Here, we present polarized neutron reflectivity measurements which have been performed on Co thin films at room temperature in UHV and in ambient air in a magnetic field of 200 mT and in the Q-range of 0.18 Å. The results confirm that the Co film is not contaminated during the polarized neutron reflectivity measurement. Herewith it is demonstrated that the mini UHV transport chamber also works as a measurement chamber which opens new possibilities for polarized neutron measurements under UHV conditions.
我们报道了一种多功能小型超高真空（UHV）腔室，其设计用于德国加兴市亥姆霍兹慕尼黑中心的于利希中子科学中心的高入射角磁反射仪上。样品在相邻的薄膜实验室通过分子束外延制备，然后移入紧凑腔室进行转移，而不暴露于环境空气中。该腔室基于DN 40 CF法兰，配备有蓝宝石视窗、小型吸气泵和一根还用作样品架的摆动棒。在此，我们展示了在室温下于超高真空和环境空气中，在200 mT磁场以及0.18 Å的Q范围内对钴薄膜进行的极化中子反射率测量。结果证实，在极化中子反射率测量过程中钴膜未被污染。由此证明，小型超高真空传输腔室也可作为测量腔室，这为在超高真空条件下进行极化中子测量开辟了新的可能性。
