光学精密工程2013，Vol.21Issue(7)：1755-1762,8.DOI:10.3788/OPE.20132107.1755
使用山嵛酸银标定中子小角散射谱仪的关键参数
Calibration of key parameters for small angle neutron scattering spectrometer by using silver behenate
摘要
Abstract
To calibrate quickly key parameters of a small angle neutron scattering spectrometer,such as selecting neutron wavelengths,wavelength resolution,and the Q resolution under a geometrical layout of the spectrometer,the experiment data of small angle neutron scattering for silver behenate powder were fitted.First,the geometrical layout of spectrometer was chosen including the size of circular source,sample apertures of the collimator,the source-to-sample distance and the sample-to-detector distance.Then,the spectra of small angle neutron scattering on silver behenate were obtained under four different revolving speeds of mechanical velocity selector.Finally,these experiment data were inversed and analyzed.Obtained results show that the velocity selector constant is 2 329.2 r · m-1 · nm,correspondingly,four different selecting neutron wavelengths are 0.776、0.582、0.466、0.388 nm,respectively.The wavelength resolution of the velocity selector is 23.75％ by fitting these experiment data and the spectrometer Q resolution curves can be obtained by using the chosen layout parameter and different rotating speeds.It concludes that the key parameters of small angle neutron scattering spectrometer can be achieved by using silver behenate,which supports the exact analysis and inversion for experiment data of small angle neutron scattering.关键词
中子小角散射谱仪/山嵛酸银/选择波长/波长分辨率/标定Key words
small angle neutron scattering spectrometer/silver behenate/selection wavelength/wavelength resolution/calibration分类
能源科技引用本文复制引用
陈良,彭梅,孙良卫,王燕,陈波..使用山嵛酸银标定中子小角散射谱仪的关键参数[J].光学精密工程,2013,21(7):1755-1762,8.基金项目
中国工程物理研究院科学技术发展基金资助项目(No.2010A0103002) （No.2010A0103002）
