Physics design for the C-ADS main linac based on two dif f erent injector design schemes

The China ADS(C-ADS)project proposes to build a 1000 MW Accelerator Driven sub-critical System around 2032.The accelerator will work in CW mode with 10 mA in beam current and 1.5 GeV in final beam energy.The linac is composed of two major sections:the injector section and the main linac section.There are two diferent schemes for the injector section.The Injector-scheme is based on a 325 MHz RFQ and superconducting spoke cavities of the same RF frequency and the Injector-scheme is based on a 162.5 MHz RFQ and superconducting HWR cavities of the same frequency.The main linac design will be diferent for diferent injector choices.The two diferent designs for the main linac have been studied according to the beam characteristics from the diferent injector schemes.