Development and demonstration of a multi-channel spheroidal focusing device for neutron beams
Development and demonstration of a multi-channel spheroidal focusing device for neutron beams
复制标题
多通道球面中子束聚焦装置的研制与演示
DOI：
10.1088/1742-6596/528/1/012007
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
et al.
中科院分区：
文献类型：
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作者：
H. Hayashida;et al.
多通道中子聚焦镜由于其多通道结构可以覆盖较大的中子束发散角，是一种能够有效提高中子强度的紧凑型装置。在这项研究中，我们试图开发一个紧凑的多通道球形（MS）中子聚焦装置的二维聚焦。MS镜的原型由三个不同直径的球面镜组成。反射镜通过镀铜方法制造，没有超反射镜涂层，并使用环形间隔物同轴对准。MS镜在J-PARC的束线10 NOBORU端口进行了演示，该端口提供了具有飞行时间谱的中子束。在大于0.5nm的波长上获得中子强度的增益因子为6，并且可以以10 s的曝光时间进行具有样品扫描的成像测试。采用Gd图案化的标准样品，成功地获得了空间分辨率为200 μm的二维图像。
A multi-channel neutron focusing mirror is a compact device that can effectively enhance neutron intensity because the multi-channel structure can cover a large divergence of a neutron beam. In this study, we attempted to develop a compact multi-channel spheroidal (MS) neutron focusing device for two-dimensional focusing. A prototype of the MS mirror consists of three spheroidal mirrors of different diameters. The mirrors are fabricated through the copper plating method without supermirror coating and are aligned coaxially using ring-shaped spacers. The MS mirror was demonstrated at beam line 10 NOBORU port at J-PARC, which provides neutron beams with time-of-flight spectra. A gain factor of 6 in neutron intensity was obtained over wavelengths greater than 0.5 nm, and an imaging test with sample scanning could be performed with an exposure time of 10 s. A Gd-patterned standard sample was employed and a 2D image with a spatial resolution of 200 μm was successfully obtained.