论文标题
使用CSN中的多毛透镜的最新中子聚焦实验
Recent neutron focusing experiments using polycapillary lens in CSNS
论文作者
论文摘要
较高的中子电流密度可以为中子实验提供便利。使用中子光聚焦元件，可以实现传输到样品的大型通量梁。作为一种焦点元素，多毛细管晶状体非常适合中子吸收实验，例如PGAA和NDP技术。目前，CSN中的中子物理学和应用光谱仪正在建设中，CSN是中国第一个脉冲中子来源。为了提供一些建议和想法，用于以下在CSN中使用多环拉里透镜的增强的PGAA或NDP仪器设计，在CSN中使用了多毛细管透镜进行了首个中子聚焦实验。对于0.5-12.6多色光束，获得了FWHM为800的焦点。随着波长的增加，梁尺寸，传输效率和增益增加。对于冷中子，增益保持在7个水平。
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.
