A small and compact AMS facility for tritium depth profiling

摘要

Depth profiling measurements of tritium in carbon samples have been performed during the past seven years at the AMS facility installed at the Rossendorf 3MV Tandetron. The samples have been cut from the inner walls of the fusion experiments ASDEX-upgrade/Garching and JET/Culham. The tritium content of the samples from JET required a dedicated AMS facility to prevent any contamination of the versatile 3MV Tandetron. On the basis of an air-insulated 100kV tandem accelerator equipped with a gas stripper an AMS facility exclusively devoted to tritium depth profiling was installed, tested and used for routine measurements. After additional successful tests employing diamond-like carbon (DLC) stripper foils at this accelerator, another small and compact 100kV tandem accelerator with SF_6 insulation and a DLC stripper has been installed at the AMS facility. Results obtained with the different tandem accelerators are presented.