A new AMS facility in Korea

E/Q and ME/Q2 contributions to machine background in sequential injection radiocarbon AMS

“…A vertical slits is placed at the object point of the first 110°high energy magnet to maximise the attenuation of ME/Q 2 ambiguities resulting from charge exchange processes along the acceleration tube [10]. The high energy spectrometer is essentially based on the original design by Purser and Litherland [10] and it is very similar, in its main features, to those installed in other AMS facilities [11][12][13][14]. The HE (high energy) analysis is in fact carried out by mean of three dispersive elements a 110°magnet, a 33°cylindrical ESA and a 90°m agnet.…”

“…3) with the rest of the HE system tuned for 14 C 3+ ions, allows to identify the origin of the contribution at E 2 as due to 13 C particles charge exchanging (4+ ? 3+) into the accelerator such that their magnetic rigidity becomes closer to the value for 14 C 3+ at 9.6 MeV (ME/ Q 2 = 14.93) (ME/Q 2 ambiguities).…”

Current activities at the Seoul National University AMS facility

“…The 100°magnetic-analyzer was installed on the 30°line of the multipurpose system (MPS) of our 4130 Tandetron AMS/MPS from HVEE [2], following two diagnostic beam viewers and a TURBOVAC pumping station. We conducted a test of the beam line using carbon beams and the beam profiles of 12 C and 13 C were successfully observed at the focal point just behind the switching magnet.…”

“…An external beam PIXE system was constructed on the 15°port of our multi-purpose beam-line [2]. Proton beams (2 MeV) were extracted through a 10 lm thick Kapton window and were used to bombard obsidian targets.…”

Simulation Study for the Separation of Rare Isotopes at the Seoul National University AMS Facility

“…It has been used for a wide variety of dating and tracing applications in the geological and planetary sciences, archaeology, biomedicine, etc. The AMS facility of Seoul National University (SNU-AMS) in Korea was completed in December 1998 (Kim et al 2000). It uses a Tandetron accelerator of the Cockroft-Walton type, manufactured by High Voltage Engineering Europa in Holland, and has a dedicated radiocarbon AMS beam line, as well as 5 ports available for other experimental purposes.…”