It is well demanded to improve the precision of 14C dating and the sensitivity of long lived radioisotopes such as 10Be and 26Al in the AMS field. A set of new dual-purpose injection system based on HVEE model 4130 AMS facility is proposed by Xi’an AMS Center

which can operate in both simultaneous and sequential modes on one set of the system by using the Wien filter. It obviously simplifies the layout as compared with the existing dual-injector and dual high energy beam line system. The calculation shows that the new dual injection system will increase the species of radionuclides which can be analyzed. Keeping the high precision of model 4130 AMS for radiocarbon dating the new system can achieve the ultra-sensitivity measurements for the nuclides such as 10Be and 26Al.