Design, fabrication and performance of taper cavity cryomodule for ADS Injector II

A β=0.15 taper cavity cryomodule was designed for the China Accelerator Driven Sub-critical System Injector II(ADS) at the Institute of Modern Physics (IMP) of the Chinese Academy of Science (CAS). This cryomodule is the third cryomodule of the ADS Linac and contains five β=0.15 taper cavities and five 5.5 T solenoids that operate at 4.2 K and 1.05 Bar. Manufacturing of the cryomodule and construction of the cold mass was finished at the beginning of 2017. The cryomodule assembly was completed at the end of March, 2017. The ADS Injector II linac accelerated a 10 mA proton beam to 25 MeV in June of 2017. This paper reports the design, fabrication and performance of this taper cavity cryomodule.