The hydrogen isotope retention in tungsten is an important issue for fusion devices. In this paper we study the possibility of using a μ m-focused deuterium beam in order to quantify deuterium distributions in microscopic dimensions. Due to the lack of cross-section data for deuteron-deuteron-scattering (dd-scattering) a validated reference sample is needed. For this purpose we used a15 μ m thick aluminum foil covered by a-C:D-layers that have been deposited in a CD 4 plasma discharge from both sides. At the SNAKE facility of the Munich tandem accelerator we already established a three-dimensional microscopy of hydrogen using protons within an energy range between 17 and 25 MeV. Now, we have tested the possibility for deuteron microscopy. As a first application we analyzed a25 μ m foil implanted with 2.0 × 10 20 atom cm −2 deuterons.    «

The hydrogen isotope retention in tungsten is an important issue for fusion devices. In this paper we study the possibility of using a μ m-focused deuterium beam in order to quantify deuterium distributions in microscopic dimensions. Due to the lack of cross-section data for deuteron-deuteron-scattering (dd-scattering) a validated reference sample is needed. For this purpose we used a15 μ m thick aluminum foil covered by a-C:D-layers that have been deposited in a CD 4 plasma discharge from both...    »