  The China ADS (C-ADS) project is proposed 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 different schemes for the injector section. The
Injector-I scheme is based on a 325-MHz RFQ and superconducting spoke cavities
of same RF frequency and the Injector-II scheme is based on a 162.5-MHz RFQ and
superconducting HWR cavities of same frequency. The main linac design will be
different for different injector choice. The two different designs for the main
linac have been studied according to the beam characteristics from the
different injector schemes.
