Simulation Research on Neutron Guide Systemfor China Advanced Research Reactor

China Advanced Research Reactor is just under building, neutron scattering is one of its important applications, and neutron guide system is an important facility for neutron scattering project. Using program VITESS, the simulation and optimization of the neutron guide system are performed in the paper, and the optimized parameters for CNGA, CNGB, CNGD are obtained. The position calculation program NGPS is developed, and the results are also shown in the paper.