New source for ultracold neutrons at the Institut Laue-Langevin
New source for ultracold neutrons at the Institut Laue-Langevin
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劳厄-朗之万研究所的超冷中子新源
DOI：
10.1103/physrevc.90.015501
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发表时间：
2014
影响因子：
3.1
通讯作者：
O. Zimmer
中科院分区：
文献类型：
--
作者：
F. Piegsa;M. Fertl;S. Ivanov;M. Kreuz;K. Leung;P. Schmidt;T. Soldner;O. Zimmer
在劳厄-朗之万研究所的专用束线上安装了一个新的超冷中子（UCN）强超热源。波长为0.89 nm的入射中子在温度约为0.7 K的充满超流体He的5升体积中转化为UCN。UCN可以被提取到室温实验。我们提出了低温设置的源，冷中子束的表征，和UCN生产测量，其中UCN密度至少为55每立方厘米的生产量被确定。
A new intense superthermal source for ultracold neutrons (UCN) has been installed at a dedicated beam line at the Institut Laue-Langevin. Incident neutrons with a wavelength of 0.89 nm are converted to UCN in a five liter volume filled with superfluid $^4$He at a temperature of about 0.7 K. The UCN can be extracted to room temperature experiments. We present the cryogenic setup of the source, a characterization of the cold neutron beam, and UCN production measurements, where a UCN density in the production volume of at least 55 per cm$^3$ was determined.