Accelerator mass spectrometry on SIRIUS: new 6MV spectrometer at ANSTO

Abstract

As a part of Australian Federal Government funding in 2009 to establish a centre for accelerator science a new 6 MV state of the art accelerator – SIRIUS – was purchased. The system is now commissioned and comprises ion sources and beam lines to cater for a wide variety of both IBA and AMS applications. The ion source used for AMS (MC-SNICS) is the latest incarnation followed by 45 degree spherical ESA(R=0.3 m) and double focusing injection magnet (R=1 m, ME=20) prior the accelerator. At the terminal we have a choice of 2 stripper gasses and/or stripper foils. The high-energy spectrometer for AMS consists of a 1.27 m radius analyzing magnet with ME=176, 45 degree ESA (R=3.81m), followed by a switching magnet and 3 beam lines: one with a standard multianode ionization chamber; one with an absorber cell in front of the detector; whereas the third beam line has a time-of- ight detector. Details of the instrument design and performance data for 10Be, 26Al and 36Cl will be presented. © The Authors