Competitive 10Be measurements below 1 MeV with the upgraded ETH–TANDY AMS facility

Competitive 10Be measurements at energies as low as 0.75 MeV are now possible with the compact ETH AMS system TANDY. In this paper we describe and discuss the modifications that led to the significantly improved performance for 10Be at the 0.6 MV accelerator. Results from the first routine measurement show that 10Be on the upgraded TANDY is now fully competitive with larger AMS systems with respect to background and measurement precision. The total efficiency for 10Be is comparable to our large 6 MV Tandem system and thus sufficient for the full range of applications in the Earth and Environmental Sciences.