The new 300 kV multi-nuclide AMS system at the Tono Geoscience Center, Japan Atomic Energy Agency
Dr Natsuko Fujita1, Mr Masayasu Miyake2, Dr Akihiro Matsubara1, Dr Yoko Saito-Kokubu1, Mr Erickson Columna3, Dr Matthias Klein3, Dr Grazia Scognamiglio3, Dr Dirk Mous3, Mr Akiomi Shimada1, Mr Tsuneari Ishimaru1
1Japan Atomic Energy Agency, Gifu, Japan, 2PESCO Co., Ltd, Gifu, Japan, 3High Voltage Engineering, Europa B.V., Amersfoort, Nederland
In the Tono Geoscience Center, Japan Atomic Energy Agency, investigation of deep underground environments for R&D program related to the geological disposal of High-Level Radioactive Waste (HLW) has been performed by using various dating systems including an AMS system. In response to the increasing demand for our AMS measurements especially from a newly established R&D program supporting development of technology for geological disposal of HLW, a state-of-the-art multi-nuclide AMS system was installed.
This system is equipped with a 300 kV AMS (4103Bo-AMS), namely “JAEA-AMS-TONO-300kV”, manufactured by High Voltage Engineering, Europa B.V., Netherlands. The system has capability to measure four nuclides: carbon-14, beryllium-10, aluminium-26 and iodine-129. JAEA-AMS-TONO-300kV is featuring the SO-110C ion source, a low energy spectrometer with electrostatic analyzer (ESA) and injection magnet with fast sequential isotope injection, tandem accelerator which maximum voltage is 300 kV, a high energy analyzer comprised of one ESA and two analysis magnets which degrees are 90 and 120, and an ionization chamber with a gas cell. The system footprint is 6.9 m x 5.0 m. The system structure and features, as well as the results of performance test will be presented.
This installation was carried out by a contract with the Ministry of Economy, Trade and Industry of Japan as part of its R&D supporting program titled “Establishment of Advanced Technology for Evaluating the Long-term Geosphere Stability on Geological Disposal Project of Radioactive Waste (Fiscal Year 2020)”.
We installed the new 300 kV multi-nuclide AMS system at the Tono Geoscience Center, Japan Atomic Energy Agency.