THE NOVEL HVEE MULTIELEMENT AMS SYSTEM

During the last decades, accelerator mass sspectrometry (AMS) has deve loped into an important scientific tool for the detection of extremely low concentrations of long-lived radio-isotopes. In addition to C-14, isotopes such as I-129 are of growing interest for applications where AMS is used because of its high sensitivity. Today, isotopes such as Be-10, C-14, Al-26 and I-129 can be measured by small AMS machines (ma ximum terminal voltage 3 MV) with a sensitivity as low as 10(-15) and with a precision as low as 0.2%. Low backgrounds and high precision me asurements require specific AMS techniques for each element. In order to design an AMS system capable of measuring Be-10, C-14, Al-26, Cl-36 , Ca-41 and I-129, We have combined the advantages of a high precision C-14 AMS spectrometer, based on simultaneous injection, with the flex ibility of sequential injection for other elements. In this article th e layout of the system and its physical characteristics will be presen ted. Furthermore, we present calculations which demonstrate that Cl-36 can be measured with a sensitivity of 10(-15) at a terminal voltage o f 3 MV.