CSNS中使用多毛细管透镜的最新中子聚焦实验
Recent neutron focusing experiments using polycapillary lens in CSNS
摘要：
较高的中子流密度可以为中子实验提供方便。利用中子光学聚焦元件，可以实现大通量束流向样品的传输。聚合物毛细管透镜作为一种聚焦元件，非常适用于PGAA和NDP技术等中子吸收实验。目前，正在中国南方科学院建设的中子物理与应用谱仪是我国第一台脉冲中子源。为了给后续的多毛细管透镜增强型PGAA或NDP装置的设计提供一些建议和思路，首次在CSNS中进行了多毛细管透镜中子聚焦实验。对于0.5-12.6多色光束，获得了FWHM为800的焦斑。随着波长的增大，光束尺寸、传输效率和增益都增大。对于冷中子，增益保持在7的水平。
英文摘要：
Higher neutron current densities can provide convenience for neutron experiments. Using neutron optical focusing elements, large flux beams transported to sample can be achieved. As one kind of focusing elements, polycapillary lens is very suitable for neutron absorption experiments such as PGAA and NDP technology. At present, a Neutron Physics and Application Spectrometer was in construction in CSNS, which is the first pulsed neutron source in China. To provide some suggestions and ideas for the following design of enhanced PGAA or NDP instrument with polycapillary lens in CSNS, a first neutron focusing experiment using polycapillary lens in CSNS was conducted. For 0.5-12.6 polychromatic beam, a focal spot with FWHM of 800 was obtained. As the value of wavelength increased, the beam size, transmission efficiency and gain increased. For cold neutron, the gain maintained in a level of 7.
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。
