THE 3MV MULTI-ELEMENT AMS IN XIAN, CHINA: UNIQUE FEATURES AND PRELIMINARY TESTS

Abstract

A 3MV multi-element accelerator mass spectrometer (AMS) has been installed in Xian, China, and preliminary tests have been completed. The results of both background and precision tests for 4 nuclides are 3.1 1016, 0.2% (14C); 1.8 1014, 1.4% (10Be); 2.3 1015, 1.14% (26Al); and 2.0 1014, 1.75% (129I). The unique features of this facility are the newly developed ion source accepting solid and CO2 samples; the specially designed low-energy injector, including a beam blanking unit and Q-snout; the acceleration tube structure with the combined magnetic and electrostatic suppression; and the function of the slit stabilization in the post-acceleration system. These features are discussed in terms of the end-users point of view.