【作者】 彭梅； 陈良； 孙良卫； 闫冠云； 李新喜；

【Author】 Peng Mei Chen Liang Sun Liangwei Yan Guanyun Li Xinxi (Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics, Mianyang 621900)

【机构】 中国工程物理研究院核物理与化学研究所；

【摘要】 速度选择器是中子小角散射谱仪的关键部件之一,使用速度选择器可以获得具有一定宽度的单色中子束,文中针对不同的参数模型,利用Vitess程序进行了计算和优化设计,根据客观需求,得到了优化的速度选择器参数。并对速度选择器后中子光学特性进行了分析,发现转子倾角和束流发散度对中子光学特性影响明显。更多还原

【Abstract】 Velocity selector is one key component of small angle neutron scattering instrument, and single wavelength neutron beam with a small width can acquired by one velocity selector. In this paper, diffirent parameters calculation and optimized designing have been done by Vitess program for several models. And have gotten optimized parameters of velocity selector based according to the external requirement. Optical characteristic of neutron after velocity selector has been analysed and found that beam devergency and tilt angle of rotor affect the optical characteristic of neutron beam markedly.更多还原