Fusion energy is a potential future energy source that is safe and sustainable. The most advanced concept for fusion power plants are Tokamaks, where hydrogen isotopes (deuterium and tritium) are fused into helium in a plasma within a toroidal vacuum chamber. The plasma facing walls are exposed to a number of adversarial conditions, such as high temperatures and thermoshocks, neutron radiation and implantation of hydrogen and helium. In current tokamaks, a divertor in the toroidal chamber is used to remove helium from the plasma, and is subjected to high fluxes of hydrogen isotopes leading to radiation damage radioactive inventories of tritium. Currently, tungsten is considered a leading candidate material for use in divertors [1]. Therefore, characterisation methods are needed to understand the hydrogen damage and retention in tungsten in tokamak reactors. Most established microscopy techniques have a low sensitivity to hydrogen and cannot resolve low concentrations of hydrogen However, Atom Probe Tomography (APT), has the same sensitivity for all elements, including hydrogen. In this study, we use newly developed APT protocols to accurately extract hydrogen contents from simulated divertor materials. We conduct APT on self-irradiated tungsten samples (2 MeV energy), serially implanted with deuterium. This leads to the accumulation of deuterium primarily in the radiation damaged (and defect-rich) layer near the sample surface, which we can track via APT. The samples are coated with iridium as a surface marker, and APT specimens are prepared by focused ion beam (FIB) milling.