To improve the intensity of the front beam of neutron horizontal geometry scattering reflectometer

we try to find out the optimized combination of beam shutter and focus neutron guide by numercal calculation method. According to the distinctness of entrance and exit section of channel and supermirror index

the combinatorial design model is divided into different groups. Select a optimized combination design model combine with the horizontal scattering geometry neutron reflectometer after calculation..The result shows that the optimized design of focusing neutron guide is that only focus on the horizontal walls of the guide with supermirror index 3 and supermirror index of the vertical wall is 2 with channel width of 10mm

and the supermirror index of shutter is 2. After analysis of many groups of combinations

we got the optimized parameters of the shutter and the focus guide and set up a theoretical foundation for the conceptual design of the neutron reflectometer.