AMS at ANTARES ± The ®rst 10 years E.M. Lawson * , G. Elliott, J. Fallon, D. Fink, M.A.C. Hotchkis, Q. Hua, G.E. Jacobsen, P. Lee, A.M. Smith, C. Tuniz, U. Zoppi Physics Division, Australian Nuclear Science and Technology Organisation, Private Mailbag 1, Menai, NSW 2234, Australia Abstract The status and capabilities of the ANTARES AMS facility after 10 years are reviewed. The common AMS ra- dioisotopes, 10 Be, 14 C, 26 Al, 36 Cl and 129 I, are routinely analysed. A capability for the detection of 236 U and other actinide isotopes has been developed. The measurement program includes support to Quaternary science projects at Australian universities and to ANSTO projects in global climate change and nuclear safeguards. Ó 2000 Elsevier Science B.V. All rights reserved. PACS: 07.75.+h Keywords: AMS; Tandem accelerator; Mass spectrometry; Radiocarbon; Cosmogenic radioisotopes 1. Introduction The development of the ANTARES AMS fa- cility began with the delivery of the Rutgers Uni- versity FN tandem and various ancillary pieces of equipment to the Lucas Heights site in September 1989. Ten years on, our AMS capabilities include the analysis of the radioisotopes 10 Be, 14 C, 26 Al, 36 Cl, 129 I, and most recently 236 U. Over this period, ANSTO has committed considerable resources to create a world-class AMS facility, previously re- viewed in [1±3]. Concurrent with the required de- velopments on the accelerator, isotope-speci®c pre-treatment and target preparation laboratories have been established to cover a wide range of materials. The present paper describes the current status of the facility, in particular new develop- ments, and key applications. 2. Facility status The layout of the facility is shown in Fig. 1. The ANTARES accelerator is a shared facility with AMS taking about 60% of the available accelera- tor time. The 860 sputter source, Alphatross source and two high energy beamlines are used for ion beam analysis (IBA). The 846B ion source is used for all AMS work. Sample changing is automated, under the control of the data acquisition computer. Fast isotope cycling is achieved by applying high voltage pulses to the injection magnet chamber; this is unchanged Nuclear Instruments and Methods in Physics Research B 172 (2000) 95±99 www.elsevier.nl/locate/nimb * Corresponding author. Tel.: +61-2-9717-3025; fax: +61-2- 9717-3257. E-mail address: eml@ansto.gov.au (E.M. Lawson). 0168-583X/00/$ - see front matter Ó 2000 Elsevier Science B.V. All rights reserved. PII: S 0 1 6 8 - 5 8 3 X ( 0 0 ) 0 0 2 7 6 - 7