Beam Dump Window Design for CSNS

Beam dump window is one of the most important parts of beam dump of China Spallation Neutron Source(CSNS). The material, structure and other concerned issue have been discussed in this paper. Thermal analyses have been applied for the beam dump window design. By comparison, GlidcopAL-15 and 316L have been chosen as window material. The window section has been designed as inner convex spherical surface and the window thickness has been set 1.5mm to 3mm by structure optimization. The window safety has been confirmed under the damage of magnet. All these analyses proved that the window can meet the requirements of CSNS beam dump well.