Analysis of Thermal Effect for China Spallation Neutron Source Primary Stripper Foil

Primary stripper foil device is one of the most important devices in rapid cycling synchrotron of China Spallation Neutron Source (CSNS). In normal operation conditions, the high temperature and other thermal effects on foil are the main factors which influence the foil’s lifetime. In order to predict the foil’s working conditions and choose an appropriate design scheme, the finite element analysis software was utilized to calculate the foil’s temperature, thermal stress and deformation in different working conditions of CSNS-Ⅰ. The simulation result shows that the highest temperature on foil is 1450 K, and the mounting mode would hardly affect the thermal stress and deformation. Based on the simulation result, the final spare foil’s number is designed to be 20, and the two-edge fixed method is utilized as the foil’s mounting scheme.