VACUUM BARRIER DESIGN OF ADS INJECTOR-ⅡHELIUM CRYOGENIC SYSTEM

In helium cryogenic superconducting accelerator system，vacuum barrier is important equipment to isolate vacuum of different systems.At first，this paper briefly introduces ADS injector-Ⅱcryogenic system，then describes structure design of vacuum barrier，after that，thermal-stress coupled analysis model is established.We obtain temperature and stress distribution of different working conditions and verify the rationality of structure design.This design provides reference basis for optimization and similar design of large cryogenic system.