R&D STATUS OF A 3.5MEV RFQ ACCELERATOR FOR ADS STUDY IN CHINA

ADS technology is under study in China for the purpose to provide a new option for the development of nuclear power station, which is going to play a more important role in our newly increased power resources to meet the demand of the rapid economy growth. In an ADS basic research program supported by Chinese government, a long-pulse intense-beam RFQ accelerator will be built at IHEP, Beijing, as the means to master the key technology in a CW RFQ. At present we have finished the design of the RFQ with pulse beam current of 50mA, output energy of 3.5MeV and length of 4.7m with two segments coupled by a resonant coupling cell. A technological copper model cavity of 1.2m long has been machined. The RF power supply of 352.2MHz, 1.2 MW is now under installation. In this paper, we will report the R&D activities on the RFQ, including the beam dynamics design, 3-D cavity modeling, the copper model manufacture and the RF power supply.