An Angular Sensitivity Study of the Boron-Lined Honeycomb Convertor Neutron Detector Used for the Small Angle Neutron Scattering

摘要

The signal to background (S/B) ratio is a key parameter to small angle neutron scattering (SANS) measurement. Higher S/B ratio is contributed to get a more accurate result. To improve the S/B ratio, the boron-lined honeycomb convertor neutron detectors (BHCND) array were designed in this paper, which refer to the ³He detectors array design, based on the intrinsic detection efficiency angular sensitivity of single BHCND. The three-dimensional sensitivities of ³He detectors and BHCNDs array were simulated and the S/B ratios were calculated and compared, respectively. The research indicates that the BHCND array could suppress background neutrons and improve the S/B ratio performing the advantages to replace the ³He detector.